JP2002186689A - Golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club whose face angle is adjustable to a desirable angle, while maintaining a desirable lie angle. SOLUTION: The hosel part (20) is formed into the shape of a bottomed cylinder, whose open mouth is formed into the shape of a real circle with the inner diameter (a) almost equal to the outer diameter of a point edge of the shaft (30). The bottom of the bottomed cylinder is formed into an oval shape extendable up to a longer distance (c) than the outer diameter of the point edge of the shaft to the right angle direction (c) against a hit face (11) with an almost equal width (b) to the outer diameter of the point edge of the shaft (30). The point edge of the shaft (30) is set up at any optional place between a front edge and a rear edge of the bottom of the bottomed cylinder, making a contact part with the open mouth at the top of the bottomed cylinder as a fulcrum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club, and more particularly to a golf club capable of adjusting a face angle to a desired angle while maintaining a desired lie angle.

[0002]

2. Description of the Related Art Recently, a wide range of people, both young and old, have come to enjoy golf. However, some golf players, such as the elderly and women, have weak muscles, Some golfers have strong muscles, some beginners have just begun playing golf, and some have advanced golfers like professional golfers. There is a great difference in head speed when swinging a golf club.

For example, in the case of beginners, women with weak muscles, and the elderly, the head speed is low, and the club head tends to be a so-called open face in which the club head is slightly opened at the moment of hitting the golf ball. Cheap.

On the other hand, in the case of advanced users and young men, the head speed is high, and the club head tends to be a so-called hook face in which the club head is slightly closed at the moment of hitting the golf ball, so that the golf ball tends to hook.

[0005] In addition, the manufacturing error of the components in the club head,
Due to assembly errors or welding distortion, the hosel part is at an angle different from the design angle with respect to the striking face, and the club head becomes an open face or hook face even if the golf club is held square. There is.

[0006] In the case of advanced players, variations in the club head can be absorbed by the swing technique, but if there is no such technique as a beginner or an intermediate player, it is easy to immediately judge that the club is difficult to use.

[0007] Therefore, various golf clubs have been proposed which can be adjusted to a face angle suitable for the swing characteristics of the golf player.

For example, a cylindrical first mounting pipe is fixed to a hosel portion of a club head, while a second mounting pipe whose central axis is inclined with respect to the shaft central axis is fixed to the shaft, and the second mounting pipe is fixed. There has been proposed a golf club in which the face angle can be adjusted by fitting a pipe into a first mounting pipe and rotating a shaft (Japanese Patent Application Laid-Open No. 08-336622 and Japanese Utility Model Application Laid-Open No. 64-20875). ,reference).

A golf club has been proposed in which the face angle can be adjusted by bending the tip of the shaft, fitting it into the hosel, and rotating the shaft (see JP-A-09-108387). .

[0010] Here, the face angle means an advance angle or a delay angle on the head toe side with respect to a square hitting face at the moment of hitting the golf ball. Also,
The lie angle refers to the angle between the shaft and the floor when the golf club is squared, and the loft angle refers to the angle between the striking face and the floor when the golf club is squared.

[0011]

However, in the golf club described in the above-mentioned conventional publication, when the face angle is adjusted, the loft angle and the lie angle change at the same time.

[0012] The loft angle is related to the rising angle of the golf ball at the time of hitting, but even if there is some variation in the loft angle, the psychological effect on golf play is small. On the other hand, the lie angle is closely related to whether the hitting face can hit the golf ball properly when the golf player makes his own natural swing, and when the lie angle changes, the position at which the golf ball is set is set. Also need to be changed, which has a great psychological effect on the player.

Therefore, when a golf player purchases a golf club, he or she holds the golf club in a square shape, checks the lie angle, and swings the golf club to intuitively check the flexure of the shaft, to determine his or her preference and In many cases, golf clubs that match the characteristics are purchased, and if the lie angle changes, the subtle sensation at the moment of hitting the golf ball changes, resulting in a completely different golf club feeling.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a golf club capable of adjusting a face angle to a desired angle while maintaining a desired lie angle.

[0015]

SUMMARY OF THE INVENTION Accordingly, a golf club according to the present invention has a grip formed at a rear end portion of a shaft, a hosel portion formed at a heel side of a club head, and a shaft formed at a hosel portion. In a golf club having a tip portion inserted and fixed with an adhesive, the hosel portion is formed in a bottomed cylindrical shape, and a top end opening of the bottomed tubular shape is a true circle having an inner diameter substantially equal to the outer diameter of the shaft tip portion. While the bottom surface of the bottomed cylindrical shape has a width substantially equal to the outer diameter of the shaft tip portion and extends in a direction perpendicular to the striking face by a distance larger than the outer diameter of the shaft tip portion. The shaft is formed in a circular shape, and the shaft has a contact point with the upper end opening of the bottomed cylindrical shape as a fulcrum, and the tip of the shaft is located at an arbitrary position between the rear end side and the front end side of the bottomed cylindrical bottom surface. Set to Characterized in that none so as to obtain.

One of the features of the present invention is that the hosel portion is formed in a bottomed cylindrical shape in which the upper end opening has a perfect circular shape and the bottom surface has an oval shape extending in a direction perpendicular to the striking face. The contact point with the cylindrical upper end opening is set as a fulcrum, and the tip of the shaft can be set at an arbitrary position between the rear end side and the front end side of the bottomed cylindrical bottom.

With this arrangement, when the tip of the shaft is located at the rear end side of the bottomed cylindrical shape having a bottomed cylinder, the face angle of the striking face is slightly closed when the golf club is held on the square ((FIG. 6)). a)). Then, for beginners with slow head speed, women with weak muscles and elderly people,
At the moment of hitting the golf ball, the hitting face was in a square state due to the bending of the shaft, or the so-called closed face or hook face where the toe side of the club head was slightly advanced, so it was hit. The golf ball will fly straight or fly slightly like a hook with a slight rotation of the hook.

In the case of long wood clubs (45-48 inch shafts), which are particularly popular with seniors, the shafts are greatly bent at the time of downswing, the club head is delayed, and the hitting face is slightly open, and the golf ball is slightly open. Although the ball may be hit, if the face angle is set to a closed face or a hook face as described above, even if the club head is delayed due to the bending of the shaft, the face angle is squared at the moment of hitting the golf ball. Can be controlled.

Conversely, if the tip of the shaft is positioned on the tip side of the bottomed cylindrical shape with the bottom, the striking face is open when the golf club is held on the square (see FIG. 6 (c)). . Then, in the case of an advanced person or a young man with a high head speed, at the moment of hitting the golf ball, the hitting face is in a square state due to the bending of the shaft, or the toe side of the club head is slightly delayed, The so-called open face causes the hit golf ball to fly straight, or to fly slightly like a slice with a slight slice rotation.

Further, even when the hosel portion is at an angle different from the designed angle with respect to the striking face due to a manufacturing error, an assembly error, a welding distortion, or the like of a golf club part, the tip of the shaft may be removed. By swinging in the front-back direction, the face angle can be adjusted arbitrarily.

As described above, by sliding the front end side of the shaft along the bottom surface of the hosel portion, a face angle according to the request of the golf player can be obtained.

Further, since the bottom surface of the hosel portion has an oval shape extending in a direction perpendicular to the striking face, the lie angle does not change at all. However, the loft angle may slightly change, but it has been confirmed that the loft angle is within a range that can be used without a sense of incongruity.

Specifically, the outer diameter of the shaft tip is 8
mm to 9 mm, the upper end opening of the bottomed cylindrical shape of the hosel part is formed into a perfect circle having a diameter of 8 mm to 9 mm, and the bottom surface is 12 mm to 14 mm in a direction perpendicular to the striking face.
It is preferable that the shaft is formed in an oval shape having a width of 8 mm to 9 mm so that the mounting angle of the shaft with respect to the club head can be adjusted with a swing angle of about 5 ° or less.

If the bottom surface of the hosel portion is formed in an oval shape, the shaft may rattle with respect to the hosel portion. Therefore, it is preferable to interpose a spacer having a plane arc shape and a triangular cross section between the shaft tip portion and the inner surface of the hosel portion. In this case, it is preferable to prepare a plurality of spacers having a triangular cross section with different lengths, select a spacer of an appropriate size from among them, and interpose the spacer between the tip portion of the shaft and the inner surface of the hosel portion.

Further, the tip of the shaft is fixed to the hosel with an adhesive, but if the bottom surface of the hosel is made elliptical as described above, there is a concern that the shaft may come off from the hosel. Therefore, it is preferable to form a recess at the tip of the shaft continuously or intermittently in the circumferential direction of the shaft, and to prevent the shaft from coming off by introducing an adhesive into the recess.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to specific examples shown in the drawings. 1 to 6 show a preferred embodiment of a golf club according to the present invention. In the figure, a club head 10 is a hollow forged product (a hollow cast product) in which a hosel portion 20 is integrally formed on the heel side, and a tip portion of a shaft 30 is fitted into the hosel portion 20 and an adhesive 50 is formed. It is fixed at.

The club head 10 includes a striking face 11, a top face 12, a sole 13, and a back face 14.
And the striking face 11 is formed as a spherical face.

The hosel part 20 has a bottomed cylindrical shape,
As shown in FIG. 5, the upper end opening has an inner diameter a = 8.5.
mm, the bottom surface has a width b = 8.5 mm, and the length c = 13 mm in a direction e perpendicular to the direction d of the striking face 11.
The upper end opening and the bottom surface are continuous with a linear inclined surface.

On the other hand, the length of the shaft 30 is approximately 109c.
The front end portion has a substantially circular shape with a cross section of 8.5 mm in outer diameter, and a concave portion 31 is continuously formed in the front end portion of the shaft 30 in the circumferential direction.

The tip of the shaft 30 is fitted into the hosel portion 20, and the tip is set at an arbitrary position between the front end and the rear end of the bottom surface of the hosel portion 20.
Adhesive 5 between the front end of the hosel 20 and the inner surface of the hosel 20.
0 is filled and fixed, and the adhesive 50 is
The shaft 30 is prevented from coming off by turning into the recess 31 at the tip end of the shaft.

Further, spacers 40, 40 are interposed between the tip of the shaft 30 and the inner surface of the hosel portion 20 (however, only one spacer may be used depending on the angle of the shaft 30). (B) and (c) have a triangular cross section to prevent the shaft 30 from rattling. As the spacer 40, an appropriate spacer corresponding to the position of the tip of the shaft 30 is selected from a plurality of spacers having a triangular cross section and different lengths of the bottom side.

Next, the operation will be described with reference to FIG. FIG. 6 shows the face angle of the striking face 11 more exaggeratedly for convenience of explanation, and the advance and delay of the toe side T of the club head 10 are actually larger than the advance and delay shown in FIG. small.

For example, when the tip of the shaft 30 is located at the center of the oval bottom surface of the hosel portion 30, FIG.
As shown in (b), when the golf club is held square, the face angle of the striking face 11 is square. Here, the striking face 11 is square in the direction in which the golf ball is intended to fly.
1 refers to the state in which it faces directly.

The tip of the shaft 30 is connected to the hosel portion 3.
0 is located on the rear end side of the bottom ellipse of FIG.
As shown in (a), when the golf club is held in a square shape, the face angle of the striking face 11 is slightly closed. Then, at the moment of the impact of the golf ball, the face angle of the impact face 11 becomes square or the club head 10
Is slightly advanced on the toe side T, that is, a so-called closed face or hook face.

Therefore, even when the head speed is slow, such as a swing of a beginner, a weak woman, or an elderly person, the hit golf ball flies straight or turns slightly hooking and flies like a hook. Will be done.

A long wood club is popular among the seniors. In the case of such a long foot club, the shaft 30 is greatly bent at the time of downswing to delay the club head 10 and the striking face 11 is slightly opened. Although the golf ball tends to hit the golf ball slightly, if the face angle is set to a closed face or a hook face, even if the club head 10 is delayed due to the bending of the shaft 30, the golf ball is hit at the moment of hitting the golf ball. Face 1
One face angle can be controlled squarely (see FIG. 6A).

Conversely, the tip of the shaft 30 is connected to the hosel 2
When it is located on the tip side of the bottom ellipse of 0, FIG.
When the golf club is set in a square shape, the striking face 11 is slightly open. Then, due to the bending of the shaft 30 at the moment of the impact of the golf ball, the face angle of the impact face 11 becomes square or the so-called open face, in which the toe side T of the club head 10 is slightly delayed.

Therefore, even when the head speed is high, such as a swing of a senior or a young man, the hit golf ball flies straight or turns slightly sliced and flies slightly. .

As described above, by sliding the tip of the shaft 30 in the front-rear direction along the bottom surface of the hosel portion 20, a face angle according to the request of the golf player can be obtained.

Also, since the bottom surface of the hosel portion is formed in an elliptical shape extending in the direction perpendicular to the hitting face, the lie angle is not changed at all, so that it can be used without any sense of incongruity.

[Brief description of the drawings]

FIG. 1 is a side sectional configuration view showing a preferred embodiment of a golf club according to the present invention.

FIG. 2 is a plan view showing the embodiment.

FIG. 3 is a front sectional configuration diagram showing the embodiment.

FIG. 4 is a diagram showing a shaft tip (a) and spacers (b) and (c) in the embodiment.

FIG. 5 is a diagram showing a relationship between a hosel portion and a striking face in the embodiment.

FIG. 6 is a diagram for explaining an operation in the embodiment.

[Explanation of symbols]

 Reference Signs List 10 club head 11 hitting face 20 hosel part 30 shaft 31 recess 40 spacer 50 adhesive

Claims (5)

[Claims] 1. A golf club comprising a grip formed at a rear end portion of a shaft, a tubular hosel portion formed at a heel side of a club head, and a shaft tip portion inserted into the hosel portion and fixed with an adhesive. In the above, the hosel portion is formed in a bottomed cylindrical shape, and the upper end opening of the bottomed cylindrical shape is formed in a perfect circle having an inner diameter substantially equal to the outer diameter of the shaft tip portion, while the bottomed cylindrical shape is formed. The bottom surface is formed in an oval shape having a width substantially equal to the outer diameter of the shaft tip portion and extending in a direction perpendicular to the striking face by a distance larger than the outer diameter of the shaft tip portion. Golf, wherein a contact point with the cylindrical upper end opening is used as a fulcrum, and the tip of the shaft can be set to an arbitrary position between the rear end side and the front end side of the bottomed cylindrical bottom. club. 2. The outer diameter of a shaft tip portion is 8 mm to 9 m.
m, the upper end opening of the bottomed cylindrical shape of the hosel portion has a perfect circular shape with a diameter of 8 mm to 9 mm, the bottom surface has a length of 12 mm to 14 mm in a direction perpendicular to the striking face, and a width of 8 mm.
2. The golf club according to claim 1, wherein the golf club is formed in an elliptical shape having a diameter of from about 9 mm to about 9 mm, and the mounting angle of the shaft with respect to the club head can be adjusted with a swing angle of about 5 degrees or less. 3. The golf club according to claim 1, wherein a spacer having a plane arc shape and a triangular cross section is interposed between the shaft tip portion and the inner surface of the hosel portion. 4. The shaft according to claim 1, wherein a concave portion is formed continuously or intermittently in a circumferential direction of the shaft at an end portion of the shaft, and an adhesive flows into the concave portion to prevent the shaft from coming off. 3. The golf club according to any one of 3. 5. The golf club according to claim 3, wherein the spacer interposed between the tip portion of the shaft and the inner surface of the hosel portion is selected from a plurality of spacers having a triangular cross section and different base lengths. .