WO2006018929A1

WO2006018929A1 - Golf club with adjustable loft angle and face angle

Info

Publication number: WO2006018929A1
Application number: PCT/JP2005/011412
Authority: WO
Inventors: Fukujyu Sato
Original assignee: Sato, Kaichi
Priority date: 2004-08-17
Filing date: 2005-06-22
Publication date: 2006-02-23
Also published as: JP4177414B2; JPWO2006018929A1

Abstract

A golf club having a loft angle, a face angle, and a weight easily and continuously adjustable according to the body form and taste of a player by after-processing and usable also for regular competitions. A sole recessed part is recessedly formed in the sole face of a golf club head and a detachable sole weight fitted to the sole recessed part is fixed to the solve recessed part at a specified projected height from the sole surface. Thus, since a sole inversion can be changed, the loft angle and the face angle can be adjusted by changing the sole inversion.

Description

Specification

Adjustable golf club with loft angle and face angle

Technical field

[0001] The present invention relates to a golf club with adjustable loft angle and face angle.

Background art

[0002] Since the loft angle and face angle of a golf club are required to be various according to the player's body shape and place diameter, a golf club that can change the loft angle and face angle in post-processing is proposed. It is.

For example, the force disclosed in Japanese Patent Application Laid-Open No. 2001-46557 This invention provides a golf club in which the lie angle of a golf club can be easily changed in accordance with the player's body shape and preferences. And a plate which is fixed to the inside of the golf club head in an inclined state, a guide hole which is drilled in the plate to guide the angle of inclination of the club shaft, and which corresponds to the guide hole. The shaft fixing pipe, which is mounted in the inserted state of the golf club head, and the club shaft, which is fixed in the inserted state in the shaft fixing pipe, are made to be a force.

The applicant of the present invention has also proposed an invention which can change the loft angle and face angle of the golf club by post-processing, and the invention is disclosed in Japanese Patent Application Laid-Open No. 2002-282400 and Patent Application 2003- No. 62,131.

The one disclosed in Japanese Patent Application Laid-Open No. 2002-282400 will be described based on FIG. 6 is a perspective view (FIG. 6 (a)) of the tip portion of the club shaft according to the embodiment disclosed in Japanese Patent Publication No. 2002-282400, and a cross-sectional view of the joint portion of the golf club head and the club shaft (FIG. )). The club shaft 101 is made of hollow carbon graphite, and its tip is slightly bent, so that the bent portion 102 is in the form of a solid solid filled with the hollow portion. Then, after the bent portion 102 is embedded in the hosel portion 104 drilled in the golf club head 103, by rotating the club shaft 101, the loft angle and the face angle of the golf club are changed, and the desired loft is obtained. The hosel portion 104 and the bent portion 102 are adhesively fixed at a rotational position at which the angle and the face angle are reached. The thing disclosed in Japanese Patent Application Laid-Open No. 2003-62131 will be described based on FIG. FIG. 7 is a look-up view (FIG. 7 (a)) and a side view (FIGS. 7 (b) and 7 (c)) of a golf club head according to an embodiment disclosed in JP-A-2003-62131. In the sole surface 202 of the golf club head 201, a disc 203 tapered in one direction in a side view is attached in a rotating manner, and by rotating the disc 203, the loft angle of the golf club and the golf club The disc 203 is fixed to the sole surface 202 of the golf club head 201 at a pivot position where the face angle changes and the desired loft angle and face angle are achieved.

Patent Document 1: Japanese Patent Application Publication No. 2001-46557

Patent Document 2: Japanese Patent Application Laid-Open No. 2002-282400

Patent Document 3: Japanese Patent Application Laid-Open No. 2003-62131

Disclosure of the invention

Problem that invention tries to solve

However, in the golf club disclosed in JP-A-2001-46557, the position and the number of the guide holes drilled in the plate (in the embodiment, it is drilled in five places) The lie angle is determined intermittently, and the lie angle can not be continuously and finely changed.

In addition, the one disclosed in JP-A-2002-282400 includes a bent portion 10 of a club shaft 101.

By rotating 2, the loft angle and the face angle are changed. Describe the loft angle. In the present invention, since the face angle is changed by changing the real loft, the loft angle and the face angle change in a mutual relation, for example, the loft angle is made constant to change the face angle. It is not possible. And since what is disclosed by Unexamined-Japanese-Patent No. 2003-62131 changes a loft angle and a face angle by rotating the disk 203 attached by the sole surface 202 of the golf club head 201, it is a golf rule. It is difficult to use it in official competitions because it may violate the supplementary rules for golf clubs.

Therefore, the present invention allows the loft angle and the face angle of the golf club to be easily and continuously changed finely according to the player's physical shape and preferences by post-processing, and it is also used in official competitions The aim is to provide a possible golf club. Means to solve the problem

In the golf club with adjustable loft angle and face angle according to claim 1 of the present invention, a sole weight is fitted in a sole recess portion recessed in a sole surface of a head, and a bottom surface of the sole weight is the sole surface force. It is characterized in that it is fixed with a desired protruding height.

The loft angle and face angle adjustable golf club according to claim 2 of the present invention is the loft angle and face angle adjustable golf club according to claim 1, wherein the sole recess has a plan view. Is circular,

The sole weight is a disc-like head and a round bar-like male screw portion fixed to the center of the head and a male screw screwed on its circumferential surface, and the head is fitted in the sole recess The male screw portion is drilled on the bottom surface of the sole recess and is screwed into a first bolt insertion hole in which a female screw is screwed on the inner surface, and the protrusion height of the bottom surface of the sole weight with respect to the sole surface Is characterized in that it is adjusted and fixed.

The loft angle and face angle adjustable golf club according to claim 3 of the present invention is the loft angle and face angle adjustable golf club according to claim 2, and the inner surface of the golf club is the inner surface thereof. And a first set screw insertion hole in which a female screw is screwed, the set screw is screwed into the first set screw insertion hole, and the tip of the set screw presses the bottom surface of the sole recess. The protrusion height of the bottom surface of the sole weight with respect to the sole surface is fixed.

Furthermore, the loft angle and face angle adjustable golf club according to claim 4 of the present invention is the loft angle and face angle adjustable golf club according to claim 1, which is a plan view of the sole recess. Is a polygon having one side on the face side of the head as a curved line or a straight line substantially parallel to the face surface, and the sole weight has a bottom surface substantially the same as the sole recess in plan view, and the bottom surface It has a peripheral wall rising from the edge of the bottom surface, and the peripheral wall fits into the sole recess, and the edge on the face side of the bottom surface of the sole weight and the back face of the head opposite to the edge The edges are respectively fixed with the desired surface height of the sole surface, and the sole weight as required in the space formed by the sole recess and the sole weight. Homolog tone of It is characterized in that adjustment weights and adjustment weights separate from Z or the sole weight are fixed.

In the present specification, claims and drawings (hereinafter referred to as "the present specification etc."), the back face means the rear of the head facing the face. The loft angle and face angle adjustable golf club according to claim 5 of the present invention is the loft angle and face angle adjustable golf club according to claim 4, wherein the polygon is the face. One side of the side is a substantially trapezoidal quadrilateral longer than the side on the back face side substantially parallel to the back face, and the projection height of the face side edge portion of the bottom surface of the sole weight Is lower than the protruding height of the edge on the back face side of the bottom surface of the sole weight.

Furthermore, the loft angle and face angle adjustable golf club according to claim 6 of the present invention is the loft angle and face angle adjustable golf club according to claim 4 or claim 5, wherein The bottom surface is provided with a bolt through hole whose inner surface is smooth and a second fixing screw insertion hole in which a female screw is screwed in the inner surface, and the bottom surface of the sole recess has a position corresponding to the bolt through hole. A second bolt insertion hole is formed by screwing a female screw on the inner surface, and a headed bolt penetrates the bolt through hole and its tip is screwed into the second bolt insertion hole The projection height of the bottom surface of the sole weight with respect to the head is adjusted, and the set screw is screwed into the second set screw insertion hole, and the tip of the set screw presses the bottom surface of the sole recess to set the set against the sole surface. Seo It is characterized in that the protrusion height of the bottom of the archeite is fixed.

Effect of the invention

A golf club with adjustable loft angle and face angle according to claim 1 comprises a method of adjusting the projection height from the sole surface of the bottom surface of the sole weight, ie, a golf club, as a method of changing the loft angle and the face angle. It depends on how to adjust the weight of the Therefore, the golf club can be used in official competitions in compliance with the rules of golf. Also, since the sole weight is fitted in the sole recess, even if the sole surface comes in contact with the ground while the golf club is swinging, the sole weight will not fall off or be damaged. The loft angle and face angle adjustable golf club according to claim 2 of the present invention uses a disc-like member fitted to a circular sole recess in a sole weight. Since the disk rotates about its center, the disk can always be kept fitted to the sole recess. Also, the protrusion height of the bottom surface of the disc-like head from the sole surface can be the maximum thickness of the disc, and by changing the thickness of the disc, the desired loft angle and feather angle can be obtained. And the sole weight can be the desired weight. The adjustment of the projection height according to the present invention is performed by rotating the male screw portion screwed into the first bolt insertion hole and moving the disk-shaped head up and down.

[0013] As a method of projecting and screwing the bottom surface of the disk-like head to a desired height by means of a sole surface force, it is possible to glue or weld the sole weight and the sole recess after screwing. In the loft angle and face angle adjustable golf club according to claim 3 of the present invention, the sole weight is fixed by the set screw. Therefore, even after the sole weight is fixed, the protrusion height of the disc-like head of the sole surface strength can be adjusted again by loosening the set screw. In addition, in order to fix the protrusion height of the bottom surface of the sole weight, the number of the first stop screw penetration holes may be one, but it is preferable to be two or more. In Example 1 to be described later, two first fixing screw insertion holes are provided, and the first fixing screw insertion holes are respectively disposed at symmetrical positions with respect to the center of the head of the sole weight. Ru.

The loft angle and face angle adjustable golf club according to claim 4 of the present invention has a sole weight shaped like a container having a polyhedron as a bottom and a peripheral wall, and has a polyhedral face surface. One side is a curved or straight line substantially parallel to the face surface. For this reason, the sole weight surface of the golf club comes into surface contact with the ground, so the sole weight according to the present invention can be attached to the fairway wood as well.

In addition, it is desirable to fix an adjustment weight identical to the sole weight and an adjustment weight separate from the Z or sole weight, if necessary, in the space formed by the recess and the sole weight. It is possible to obtain a golf club having a loft angle and a face angle, and a balance matched to the preference of the player. The adjustment weight used here refers to an adjustment weight that is integrally molded with the sole weight to form an integral weight, and a separate adjustment weight is an adjustment weight that is separate from the sole weight. Say The second embodiment described later shows the case where the same adjustment weight is used.

According to the fifth aspect of the present invention, the loft angle and the face angle of the adjustable golf club have a bottom surface of the sole weight in a substantially trapezoidal shape in which one side on the face side is longer than one on the back face side. Since it has a rectangular shape, and the protruding height of the edge on the face surface side is lower than the protruding height of the edge on the back face side, the golf club swings better, and it is used for fairway wood. If you do, you can get a club that is easy to use.

[0016] The loft angle and face angle adjustable golf club according to claim 6 of the present invention is to adjust and fix the protrusion height of the bottom surface of the sole weight with respect to the sole surface by means of a head bolt and a set screw, respectively. As in the invention according to claim 3 of the present application, even after the sole weight is fixed, the protrusion height of the sole weight of the sole surface force can be adjusted again. In addition, in order to fix the protrusion height of the bottom of the sole weight, each of the second bolt insertion hole and the second set screw insertion hole may be one, but at least two or more of them may be two or more. It is preferable to do. In the second embodiment described later, the second bolt insertion holes are two, the second set screw insertion holes are one, and the second bolt insertion holes are on the face side and the back face side of the sole weight. The force that arranges and places the second stop screw hole in the middle The two second stop screw holes are arranged on the face side and the back face side of the sole weight, and one first one is in the middle You may arrange 2 bolt insertion holes!

Of course, the head and sole weight according to claims 1 to 6 of the present application may be made of metal or synthetic resin, respectively.

Brief description of the drawings

FIG. 1 is a look-up view of a sole surface of a golf club head with adjustable loft angle and face angle according to a first embodiment.

[FIG. 2] FIG. 2 is a cross-sectional view taken along line II in FIG.

[FIG. 3] FIG. 3 is an explanatory view of a loft angle and a face angle of a golf club head having adjustable loft angle and face angle according to the first embodiment.

[FIG. 4] FIG. 4 is a perspective view of a sole surface of a golf club head with adjustable loft angle and face angle according to a second embodiment. [FIG. 5] FIG. 5 is a sectional view taken along the line V-V in FIG.

[Fig. 6] Fig. 6 (a) is a perspective view of the tip portion of the club shaft according to the embodiment disclosed in Japanese Patent Application Laid-Open No. 2002-282400, and Fig. 6 (b) is a joint of the club head and the club shaft. It is a sectional view of a part.

[FIG. 7] FIG. 7 (a) is a view of a golf club head according to an embodiment disclosed in Japanese Patent Application Laid-Open No. 2003-62131, and FIGS. 7 (b) and 7 (c) are clubs. It is a side view of a head.

Explanation of sign

1 Golf club head with adjustable loft angle and face angle according to the first embodiment

2 Golf club head with adjustable loft angle and face angle according to the second embodiment

10 sonore surface

12 faces

14 knock face

16 Beausel

22 The sole recess according to the first embodiment

24 'Seal recess according to Example 2

26 sow weight according to the first embodiment

28 Sole weight according to the second embodiment

34 1st bolt insertion hole

36 Stop screw

38 1st stop screw insertion hole

40 headed bolt

42 bolt through hole

44 Second bolt insertion hole

46 Second set screw insertion hole

48 Adjustment weight

BEST MODE FOR CARRYING OUT THE INVENTION

Example 1 and Example 2 according to the best mode for carrying out the present invention will be described with reference to FIG. 1 and FIG. FIG. 1 is an elevation view of a sole surface of a golf club head with adjustable loft angle and face angle according to Example 1, FIG. 2 is a cross-sectional view taken along the line II in FIG. Explanatory drawing of the loft angle and face angle of the golf club head with adjustable loft angle and face angle according to Example 1, FIG. 4 shows the golf club head with adjustable loft angle and face angle according to Example 2. FIG. 5 is a perspective view of the sole surface, and FIG. 5 is a sectional view taken along the line V-V in FIG.

In FIGS. 1 to 5, reference numeral 1 denotes a golf club head with adjustable loft angle and face angle according to the first embodiment, and reference numeral 2 denotes adjustable loft angle and the face angle according to the second embodiment. The head of a golf club, numeral 10 is a sole surface, numeral 12 is a face, numeral 14 is a knock face, numeral 16 is a bezel, numeral 22 is a sole recess according to the first embodiment, and numeral 24 is a sole recess according to the second embodiment. The reference numeral 26 denotes a sole weight according to the first embodiment, the reference numeral 28 denotes a sole weight according to the second embodiment, the reference numeral 30 denotes a head, the reference numeral 32 denotes a male screw, the reference numeral 34 denotes a first bolt insertion hole, and the reference numeral 36 denotes Locking screw 38 is a first locking screw insertion hole, 40 is a head bolt, 42 is a bolt through hole, 44 is a second bolt insertion hole, 46 is a second locking screw insertion hole, 48 is a weight for adjustment.

Example 1

First, a golf club head 1 with adjustable loft angle and face angle according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 3. FIG.

The loft angle and face angle adjustable golf club according to the first embodiment comprises a head 1 and a shaft (not shown) having a grip attached to one end thereof. It is attached to the hosel 16. For Example 1 and Example 2 to be described later, the shaft and the grip use well-known ones, and the method of fixing the shaft to the head also uses known techniques. Therefore, in the first and second embodiments, the head will be mainly described.

On the sole surface 10 of the head 1, a sole recess 22 having a circular plan view is provided. The sole recess 22 is open to the sole surface 10 and has a substantially cylindrical shape. Then, in the first embodiment, the size of the opening surface of the sole recess 22 is approximately 20 mm, and the depth of the recess is approximately 10 mm. The size of the surface and the depth of the recess are appropriately determined. Change It is possible. Further, in the first embodiment, the position at which the sole recess 22 is provided may be a force that is closer to the back face 14 of the head 1 and closer to the heel. This position can also be changed as appropriate. Furthermore, a first bolt insertion hole 34 is drilled at the center of the bottom of the sole recess 22. A female screw is screwed into the inner surface of the first bolt insertion hole 34, and a male screw portion 32 of a sole weight 26 described later is screwed into this female screw.

The sole weight 26 also exerts a force with the disk-shaped head 30 and the male screw portion 32, and the male screw portion 32 is erected at the center of the disk-shaped head 30, and the overall shape is the head. It is in the form of a bolt. The male screw portion 32 is screwed into the first bolt insertion hole 34 described above, and the screwing length is adjusted to adjust the surface of the head 30 (that is, when the sole weight 26 is inverted). It is possible to adjust the height of the bottom surface protruding from the sole surface 10).

Further, in the head portion 30, first fixing screw insertion holes 38, 38 are bored in the thickness direction of the disc, and on the inner surface thereof, a female screw in which the locking screw 36 is screwed is provided. It is screwed. Furthermore, a groove is formed on the surface of the head 30 so as to cross the central part thereof, and the tip of the screw driver is fitted in this groove so that the sole weight 26 can be fitted to the sole recess 22. Can now be turned!

The set screw 36 has a round bar shape having the same diameter throughout the entire length, and a male screw is screwed on the circumferential surface thereof, and as described above, the set screw 38 is screwed into the first set screw insertion hole 38. When the end of the set screw 36 is screwed into the first set screw insertion hole 38 and protrudes toward the bottom of the sole recess 22, the other end of the set screw 36 is the first set screw insertion hole. Immersed in 38. Further, a groove is engraved on the surface of the other end of the set screw 36 so as to cross the central part thereof, and the tip of the screw driver is fitted in this groove.

Next, the terms describing the loft angle, face angle and sole inversion used in the present specification and the like will be described based on FIG. GL in FIG. 3 is the ground.

The angle α with the line B, which is the face surface, with respect to the shaft axis A is called the face angle, and the case of a = 0 ° is a square, and the case of α 0 0 ° (the case of illustration) is a hook face, α The case of> 0 ° is called open face. Also, the sole inversion means the line D force formed by the surface of the knoll, as shown in Fig. 3 (c). When there is a sole inversion, when there is a line D and GL, I say that there is no sole inversion. The loft angle indicates the degree of inclination of the face, and the angle β 1 between the line A and the line C indicating the inclination of the face is called real loft, and the angle β 2 between GL and the line C才 Giji レレ Ρ ヽぅ and 卜.

By screwing the male screw portion 32 of the sole weight 26 into the first bolt insertion hole 34 of the sole recess 22 and changing the screwing length, the bottom surface of the sole weight 26 relative to the sole surface 10 is The protrusion height changes. The change in the height of the bottom of the sole weight 26 changes the state of the sole inversion, the state strength and the state of the sole inversion, and the inclination of the line D changes, so the original loft 132 changes, but the real loft / 3 1 does not change.

Specifically, as the protrusion height of the bottom surface of the sole weight 26 is gradually increased, the original loft β 2 gradually decreases while the face angle α also gradually changes in the negative direction. I will. That is, the face angle α changes from the open face to the hook face (the state shown in FIG. 3A). Then, with the desired original loft j 8 2 and the face angle a, that is, with the desired height of the sole weight 26 bottom surface, the first set screw penetration holes 38, 38 are provided. When the setscrews 36 and 36 are inserted and screwed in by turning the setscrews 36 and 36 clockwise, the tip of the setscrew 36 presses the bottom surface of the sole recess 22. When the set screw 36 presses the bottom surface of the sole recess 22, the sole weight 26 can not be turned and the sole weight 26 is fixed to the sole recess 22. The sole weight 26 itself can be turned again by turning the setscrews 36, 36 counterclockwise to separate the tips of the setscrews 36, 36 from the bottom force of the sole recess 24. Therefore, after the sole weight 26 is fixed, the projection height of the bottom of the sole weight 26 can be readjusted.

By the way, in the club shaft (hereinafter referred to as “bend shaft”) disclosed in Japanese Patent Laid-Open No. 2002-282400 shown in “Patent Document 2”, the real loft j 8 1 is a changing force. Narloft 2 does not change. Table 1 shows the relationship between the bend shaft and the head 1 of the golf club according to the first embodiment of the present invention (hereinafter referred to as “head 1”). In Table 1, 1 represents no change, X does not change, and X represents a case.

[0031] [Table 1] Real Loft (1) Origami Nano Reloft (/ 3 2) Face Angle () Bend Shaft X X ヘッド Head 1 X 〇

From the relationship between the bend shaft and the head 1 as described above, the present invention exerts the effect even more by combining it with the bend shaft, which will be described below.

Insert the bent portion 102 (see FIG. 6) of the bend shaft 101 into the hosel 16 and turn the bend shaft 101 slightly to the left or right, the real loft | 81 decreases and the face angle α increases And become an open face. Therefore, as described above, as the protrusion height of the bottom surface of the sole weight 26 is gradually increased, the face angle a also gradually changes in the negative direction, and the face surface which has become an open face returns to the original state. It will be. By such a procedure, it is possible to obtain a golf club having a desired original loft / 32 and a face angle (X.

Example 2

Next, a golf club head 2 with adjustable loft angle and face angle according to a second embodiment of the present invention will be described based on FIG. 4 and FIG. In the second embodiment, the same elements as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted if the description is duplicated.

The loft angle and face angle adjustable golf club according to the second embodiment comprises a head 2 and a shaft (not shown) having a grip attached to one end thereof. It is anchored to Hosel 16.

A sole recess 24 having a substantially trapezoidal shape in plan view is recessed in the sole surface 10 of the head 2. The shape of the sole concave portion 24 in a plan view is such that one side on the face 12 side is a curved line substantially parallel to the face 12 and the one side on the back face 14 is substantially curved parallel to the back face 14 And one side on the face 12 side is a shape in which both ends on one side on the face 12 side longer than one side on the back face 14 side and one end on the back face 14 side are connected by straight lines. It has become. The sole recess 24 is recessed substantially vertically, and the depth of the recess is deeper at the back face 14 side than at the face 12 side. Implementation In Example 2, the size of the substantially trapezoidal shape of the sole recess 24 is approximately 35 mm for the side on the face 12 side, approximately 25 mm for the side on the back face 14 side, and the side on the face 12 side and the back face The distance from the side on the 14 side is approximately 55 mm, the depth of the recess on the face 12 side is approximately 5 mm, and the depth of the recess on the back face 12 side is approximately 10 mm. The depth of the recess can be changed as appropriate. Further, second bolt insertion holes 44, 44 are formed respectively on the face 12 side and the back face 14 side of the bottom surface of the sole recess 24, and the inner surface of the second bolt insertion hole 44 is formed. Is screwed with a female screw. Here, the second bolt insertion hole 44a is used as the knotter ace 14 side, and the second bolt insertion hole 44b is used as the face 12 side.

The sole weight 28 is formed to fit in the sole recess 24. That is, the surface of the sole weight 28 (the bottom surface when the weight weight 28 is inverted) has a trapezoidal shape substantially the same as the shape of the sole recess 24 in plan view, and the substantially trapezoidal edge of the sole weight 28 And the height of the peripheral wall on the back face 14 side is higher than the height of the peripheral wall on the face 12 side.

Bolt through holes 42 are formed at positions on the surface of the sole weight 28 corresponding to the second bolt insertion holes 44a and the second bolt insertion holes 44b, respectively. 4 2a and bolt through hole 42b. The inner surface of the bolt through hole 42 is smooth, and two holes with different diameters centered on the same axis are continuously provided. That is, due to the difference in diameter, a step portion is formed on the inner surface of the bolt through hole 42 and is opened at the bottom surface of the large diameter force S sole weight 28. Also, a second set screw insertion hole 46 is bored between the bolt through hole 42a of the sole weight 28 and the bolt through hole 42b, and the inner surface of the second set screw insertion hole 46 is formed. Is screwed with a female screw.

And, through the headed bolt 40 consisting of the head and the male screw portion, the 40 force bolt through hole 42a and the bolt through hole 42b, the tip end thereof is the second bolt insertion hole 44a and the second The sole weight 28 is screwed into the sole recess 24 by screwing into the bolt insertion hole 44b. Then, in order for the head of the headed bolt 40 to engage with the step formed on the inner surface of the bolt through hole 42, the height at which the surface of the sole weight 28 protrudes from the sole surface 10 is adjusted. That is, a headed bolt which passes through the bolt through hole 42a and is screwed into the second bolt insertion hole 44a. The projection height of the edge on the back face 14 side of the bottom surface of the sole weight 28 is adjusted by the screwing length of the bolt 40, and the head is threaded through the bolt through hole 42b and screwed into the second bolt insertion hole 44b. The height at which the edge on the face 12 side of the bottom surface of the sole weight 28 is adjusted by the screwing length of the bolt 40.

The shape of the set screw 36 has been described in the first embodiment, and thus the description thereof is omitted.

A closed space is formed by screwing the sole weight 28 and the sole recess 24. The adjustment weight 48 is accommodated and fixed in the closed space. The adjustment weight 48 in the second embodiment is integrally molded with the bottom of the sole weight 28. That is, the weight of the adjustment weight 48 is adjusted by appropriately adjusting the thickness of the bottom surface of the sole weight 28. Of course, the sole weight 28 and the adjustment weight 48 may be separately provided and fixed at a predetermined position in the closed space formed by the sole weight 28 and the sole recess 24.

Next, the operation of the head 2 will be described. As to the terms of loft angle, face angle and sole inversion, the contents described in Example 1 can be applied to Example 2 as they are, so the description thereof is omitted, and the loft angle, face angle and sole inversion are omitted. The code attached for the explanation of John is also used as it is.

After the sole weight 28 is fitted in the sole recess 24, the headed bolts 40, 40 are passed through the bolt through holes 42a, 42b and further screwed in the second bolt wedge holes 44a, 44b. Let it go. Then, the edge on the face 12 side of the bottom of the sole weight 28 is made substantially the same as the sole surface 10, and the projection height of the edge on the back face 14 side of the bottom of the sole weight 28 is adjusted. Line D shown in c) goes up to the right. That is, the protrusion height of the edge on the face 12 side of the bottom surface of the sole weight 28 is fixed substantially the same as that of the sole surface 10, and only the protrusion height of the edge on the bottom face of the sole weight 28 on the knock face 14 side The loft angle and face angle adjustment method in the first embodiment described in paragraph number (0028) and paragraph number (0029) can be applied as it is.

[0044] Further, as in Example 1, the golf club head 2 capable of adjusting the loft angle and the face angle according to Example 2 and disclosed in Japanese Patent Application Laid-Open No. 2002-282400 disclosed in "Patent Document 2". Be A golf club having a desired original loft j 82 and a face angle α can be obtained by using a dovetail shaft in combination, as in Example 1. Adjustment of the loft angle and face angle in Example 2 The description of the method is omitted.

[0045] With the desired original loft 13 2 and face angle (with X, screw the set screw 36 into the second set screw hole 46 and place the tip of the set screw 36 on the bottom of the sole recess 24 When the set screw 36 presses the bottom of the sole recess 24, the sole weight 28 is fixed to the sole recess 24. In order to adjust the height of the sole weight 28 again, As in the first embodiment, this can be achieved by turning the set screw 36 to the left to separate the bottom force of the sole recess 24.

Further, since the sole weight 28 according to the second embodiment is in surface contact with the ground, it can also be used for a fairway wood where the resistance to the grass (ground) at the time of striking is small, and The shape force in plan view of the ball weight 28 is approximately trapezoidal with a long face 12 side and a short back face 14 side, and the protrusion height on the face 12 side is substantially the same as that of the sole surface 10, so swinging off during swinging It will be very good.

Since the closed space is formed by the sole weight 28 and the sole recess 24, it has been described that the adjustment weight 48 can be accommodated and fixed in this space. In this way, by attaching the adjustment weight 48, it is possible to obtain a golf club having a loft angle, face angle and balance suitable for individual players who do not attach the balance weight to the outer surface of the golf club head. .

The edge on the face 12 side of the bottom surface of the sole weight 28 is fixed to the sole surface 10 substantially at the same height as that of the sole surface 10, so the face 12 side of the sole weight 28 is concaved in the sole recess. 26. Support the bolt through holes 42 and 42 so that they can be opened and closed, and make the bolt through holes 42, 42 only the bolt through holes 42a.

Claims

The scope of the claims

[1] The sole weight fits in the sole recess provided in the sole surface of the head,

The loft angle and face angle adjustable golf club characterized in that a bottom surface of the sole weight is fixed with a desired protrusion height of the sole surface force.

[2] The sole recess has a circular plan view,

The sole weight is a disc-like head and a round bar-like male screw portion fixed to the center of the head and having a male screw screwed on its circumferential surface,

The head fits in the sole recess,

The male screw portion is drilled on the bottom surface of the sole recess portion, and is screwed into a first bolt insertion hole in which a female screw is screwed on the inner surface, and the protrusion height of the bottom surface of the sole weight with respect to the sole surface is The loft angle and face angle adjustable golf club according to claim 1, characterized in that it is adjusted and fixed.

[3] A first set screw insertion hole in which a female screw is screwed on the inner surface of the head is bored, and a set screw is screwed into the first set screw insertion hole and the tip of the set screw is inserted. The loft angle and face angle adjustable golf according to claim 2, wherein the projection height of the bottom surface of the sole weight with respect to the sole surface is fixed by pressing the bottom surface of the concave portion of the sole. club.

[4] A planar view of the sole recess is a polygon having one side on the face side of the head in a curved or straight shape substantially parallel to the face surface,

The sole weight has a bottom surface substantially identical in plan view to the sole recess and a peripheral wall rising from an edge of the bottom surface,

The peripheral wall fits in the sole recess;

The edge on the face side of the bottom surface of the sole weight and the edge on the back face side of the head opposite to the edge are respectively fixed with the desired surface height of the sole surface.

In the space formed by the sole recess and the sole weight, an adjustment weight identical to the sole weight and an adjustment weight separate from Z or the sole weight may be fixed, as necessary. The loft angle of claim 1, characterized in that And adjustable face angle golf club.

[5] The polygon is a substantially trapezoidal quadrilateral whose one side on the face side is longer than one side on the back face side substantially parallel to the back face,

5. The loft according to claim 4, wherein the protrusion height of the edge on the face side of the bottom surface of the sole weight is lower than the protrusion height of the edge on the back face side of the bottom surface of the sole weight. Angle and face angle adjustable golf club.

[6] The bottom surface of the sole weight is provided with a bolt through hole having a smooth inner surface and a second fixing screw insertion hole in which a female screw is screwed on the inner surface,

A second bolt insertion hole, in which a female screw is screwed on the inner surface, is formed at the bottom surface of the sole recess at a position corresponding to the bolt through hole.

A head bolt passes through the bolt through hole and its tip is screwed into the second bolt insertion hole to adjust the height of the bottom surface of the sole weight with respect to the sole surface, and the set screw is the second set The screw is inserted into the screw insertion hole, and the tip of the set screw presses the bottom of the recess of the sole to fix the protrusion height of the bottom of the sole weight with respect to the sole surface. An adjustable loft angle and a golf club according to claim 5.