JP2001062007A - Golf club head and golf club set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head with which a slice hardly occurs. SOLUTION: This golf club head 1 is recessed with a plurality of substantially parallel extending face line grooves 4 on a clubface 2a. All the face line grooves 4 in a reference state that the head 1 is soled to a horizontal surface GL at a lie angle α inclines upward from a heel h side toward a toe t side. The angle of inclination of the face line grooves 4 with the horizontal line N on the clubface 2a is specified to >=0.5 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head and a golf club set that can be held without any discomfort even when the face is closed.

[0002]

2. Description of the Related Art Generally, in a typical beginner golfer or the like, when hitting a ball, the head does not fully return to a state at the time of addressing.
It is easy to hit the ball with the face open. Therefore, in the case of a right-handed golfer (hereinafter, the right-handed golfer will be described unless otherwise specified), the hit ball is sliced or flies rightward from the target. Often. Especially the club length is long and the loft is standing (the loft angle is small)
In the case of a so-called long iron or the like, the face surface is easily opened when hit, so that slicing is easy. For this reason, for beginner golfers, it is often the case that a golf club in which a loft is standing has a face surface closed in advance at the time of addressing and suppresses a slice ball or the like by compensating for the difficulty of returning the head. Is being done.

In the case of a conventional iron-type golf club head, for example, as shown in FIG. 5, a plurality of face line grooves c extending substantially parallel to the face surface b.
Is formed in a recessed state, and in the reference state in which the head a is solely set on the horizontal plane GL at the lie angle α, the face line groove c
Are formed substantially parallel to the horizontal plane GL. For this reason, in the golf club having such a head a, when the face surface is closed at a small angle β as shown in FIG. 6, the direction A2 orthogonal to the face line groove c is on the left side of the target direction A1. There is a problem that it is difficult to swing because the player is turned around. Such psychological discomfort also causes disturbance of the swing.

[0004] In view of the above problems, in the invention described in claims 1 to 3, all face line grooves are directed from the heel side to the toe side in a reference state in which the head is solely level on a horizontal plane at a lie angle. It is an object of the present invention to provide a golf club head which can be held without discomfort even in a state where the face surface is closed, based on the fact that the angle of inclination is limited to a certain range while being inclined upward.
Japanese Utility Model Application Laid-Open No. 63-114678 and the like disclose that the face line groove is inclined. However, this is because the face line groove is inclined upward from the toe side toward the heel side. Is fundamentally different from

[0005] In the invention according to claim 4 or 5, the inclination of the face line groove is set to be larger for a golf club head which is easier to slice.
It is an object of the present invention to provide a golf club set that helps to suppress slicing through all counts.

[0006]

According to a first aspect of the present invention, there is provided a golf club head in which a plurality of face line grooves extending substantially in parallel are recessed in a face surface, and the lie angle is provided. In a reference state in which the head is solely leveled in the horizontal plane, all the face line grooves are inclined upward from the heel side to the toe side, and the inclination angle θ of the face line groove with respect to a horizontal line on the face surface
Is set to 0.5 ° or more.

According to a second aspect of the present invention, the face surface has a substantial ball hitting area in which the face line groove is recessed, and the ball hitting area has an end on a toe side and an end on a heel side. 3. The golf club head according to claim 1, wherein a boundary line on the toe side and a boundary line on the heel side, respectively, are substantially orthogonal to the horizontal line in the reference state.

According to a third aspect of the present invention, the golf club according to the first or second aspect, wherein the inclination angle θ is 0.5 ° or more and less than 3.0 ° and is an iron type. The club head.

According to a fourth aspect of the present invention, the golf club includes at least one iron golf club equipped with the golf club head according to the third aspect, and the loft angle is increased from the lowest-numbered golf club having the smallest loft angle. A golf club set in which n (where n is an integer of 3 or more) golf clubs are set as a maximum golf club having the largest golf club, wherein the face line groove of the golf club of an arbitrary golf club is set. The inclination angle θa and the inclination angle θb of the face line groove of the golf club having a larger loft angle satisfy the relationship of θa ≧ θb.

According to a fifth aspect of the present invention, the inclination angle of the face line groove is θ1, θ2,..., Θn in the order from the lowest golf club to the highest golf club. 5. The golf club set according to claim 4, wherein a relationship of θ1> θn and θ1 ≧ θ2 ≧.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 illustrates an iron-type golf club G. The golf club G is a golf club head (hereinafter, may be simply referred to as “head”).
1 and a shaft S. The head 1 has a head body 2 and a shaft insertion portion 3 connected to the heel h side thereof and into which the shaft S can be inserted. The head body 2 is integrally formed, for example, stainless steel, soft iron, titanium alloy or any of these. It can be composed of various materials such as a composite material in which two or more kinds are combined. FIG. 1 shows a reference state in which the golf club G is solely formed on the horizontal plane GL at the lie angle α. The lie angle is determined in advance for each golf club G or head 1, the axis center line CL of the shaft S (or the shaft insertion portion 3) is positioned in a vertical plane, and the face surface 2 a is positioned on the horizontal plane GL. This is the angle between the horizontal plane GL and the axis center line CL when the sole 2b of the head 1 is solely inclined to the horizontal plane GL while being inclined at the loft angle. “Sole” means that the sole portion 2b is brought into contact with the horizontal plane GL.

The head main body 2 has a plurality of face line grooves 4 extending substantially parallel to the face 2a, which is the side on which the ball is hit. The face line groove 4 plays a role of increasing friction with the ball on the face surface 2a, and may be formed, for example, with a groove cross section having a substantially triangular cross section. Regarding the face line groove 4, the golf rules of the Japan Golf Association,
It is specified that the groove width is 0.9 mm or less, the groove depth is 0.5 mm or less, and the groove interval is three times or more the groove width. The face line groove 4 of the present example is set, for example, so that the groove width is 0.5 to 0.9 mm, the groove depth is 0.3 to 0.5 mm, and the interval between the grooves is 3 to 5 times the groove width.

In the head 1 of the embodiment, in the reference state, all the face line grooves 4 are inclined upward from the heel h side to the toe t side, and
The inclination angle θ of the face line groove 4 with respect to the horizontal line N extending on the face surface 2a is 0.5 ° or more.

As described above, in the head 1 of the present embodiment, all the face line grooves 4 are inclined upward from the heel h side to the toe t side so that the face surface 2a is oriented in the target direction as shown in FIG. When closed at a smaller angle β than the conventional one,
It is alleviated that the direction A2 perpendicular to the left direction is more leftward than the target direction A1, for example, it is possible to make these directions coincide. Therefore, it is possible to reduce a sense of incongruity when the face 2a is held in a closed state, which is useful for making it easier to swing.

As a result of various experiments by the inventors, a test hit test was conducted with a golf club equipped with a head having a large lie angle and a head with a large lie angle. The larger the angle of the head, the more psychologically secure it is.
It was found that the grip of the ball was improved and the slice was less likely to come out. In the head 1 of the present embodiment,
Since the toe side of the face line groove 4 is inclined upward, when the face surface 2a is correctly held in the target direction without closing, the golfer feels that the lie angle of the golf club G is large. You can do it (club angling). Therefore, the head 1 of this embodiment is useful for stabilizing the direction of the hit ball by reducing the number of slices also from such a psychological aspect.

Here, the reason for limiting the inclination angle θ of the face line groove 4 to 0.5 ° or more is that if the angle θ is less than 0.5 °, the face line groove 4 This is because it becomes difficult to visually distinguish the inclination of the image. Conversely, even if the inclination angle θ is excessively large, it is easy to feel a sense of incongruity when holding the camera.
Is 0.5 ° or more and 3.0 ° or less, more preferably 0.5 ° or more and less than 3.0 °, more preferably 0.5 ° or more and less than 3.0 °.
It is particularly desirable that the angle be in the range of 2.5 to 2.5, more preferably 1.0 to 2.5. The inclination angle θ is measured along the surface of the face 2a.

As shown in FIG. 1, the face surface 2a has a substantial ball hitting area 5 in which the face line groove 4 is formed in a recess. The ball hitting area 5 has a toe t
Toe-side boundary line L indicating the end of the side and the end of the heel h, respectively
1 and the heel-side boundary line L2, the toe-side end 6
t and the end 6h on the heel side. Specifically, such a ball hitting area 5 is visually represented by being color-coded with an end 6t on the toe side and an end 6h on the heel side, or by changing the presence or absence of plating and the roughness of the surface. In many cases, as shown in FIG. 3, the face line groove 4 may be specified only by the end 4e. In this case, the boundary lines L1 and L2 can be virtually specified by connecting the ends 4e and 4e of the face line grooves 4 having substantially the same length in the vertical direction except for the short grooves 4 on the toe t side. .

In the head 1 of this embodiment, in the reference state, the toe-side boundary line L1 and the heel-side boundary line L2 are each substantially orthogonal to the horizontal line N. Here, that each of the boundary lines L1, L2 is substantially orthogonal to the horizontal line N means that each of the boundary lines L1, L2,
The intersection angle between L2 and the horizontal line N is in a range of 90 ± 3 °, more preferably in a range of 90 ± 2 °, further preferably 90 ± 1 °, more preferably 90 ± 1 °.
It means that it is in the range of {± 0.5}. Each boundary line L
If L1 and L2 are not substantially perpendicular to the horizontal line N, a strong sense of discomfort is likely to be felt when the golf club G is held, and the swing tends to be psychologically disturbed. In addition, when only the face line groove 4 is inclined, such a problem is improved.

Such a head 1 is suitable for an iron type head as shown in the drawings, for example, a so-called utility type head having a hollow portion inside and having an intermediate shape between a wood type and an iron type. Also applicable to heads. In addition, in the case of the iron type, in addition to the 1st iron to the 9th iron, pitching wedges, approach wedges, sand wedges, lob wedges, and the like can be applied irrespective of the number of irons. The present invention can be particularly suitably applied to an iron golf club having a strong tendency, for example, for a middle or long iron having a loft angle of 40 ° or less, preferably 35 ° or less, more preferably 30 ° or less.

FIG. 4 shows an embodiment of an iron golf club set including one or more, preferably a plurality of iron golf clubs to which such a head 1 is attached. The iron golf club set includes n golf clubs from the lowest golf club having the smallest loft angle to the highest golf club having the largest loft angle (where n is 3).
The golf club of the above-mentioned integer number can be configured as a set. Specifically, a set of 7 irons from 3 irons to 9 irons, and more than 8 sets including one or more wedges such as pitching wedges, approach wedges, sand wedges, and lob wedges However, in addition to this, for example, the number of counts may be a half set including only odd numbers or even numbers, and the total number of sets is 3 or more, preferably 6 or more.
More preferably, it can be composed of 7 or more, and still more preferably 8 to 10. In the iron golf club set, for example, the loft angle is the smallest, and
A combination of 5 degrees and the largest loft angle of about 56 to 60 degrees is preferable.

FIG. 4 shows three iron type golf clubs G taken out of these sets, and other golf clubs are not shown. FIG. 4 (A)
The golf club of FIG. 4C and the golf club of FIG.
Also shows that the length gradually decreases as the loft angle increases.

In such an iron golf club set, the inclination angle of the face line groove 4 of the golf club of an arbitrary number is θa, and the inclination angle of the face line groove of the golf club having a larger loft angle is θa. Is preferably θb, there is preferably a combination that satisfies the relationship of θa ≧ θb. In general, the smaller the loft angle, the larger the club length, the more difficult it is to grasp the ball, and the higher the probability of slicing. Therefore, it is possible to provide a golf club set that suppresses slicing or the like by increasing the inclination angle θ of the face line groove 4 for a head having a smaller loft angle.

From this point of view, it is particularly preferable that the inclination angles of the face line grooves are θ1, θ2,..., Θn in the order from the lowest golf club to the highest golf club. Where θ1>
It is desirable to set the inclination angle θ of the face line groove 4 so as to satisfy the relationship of θn and θ1 ≧ θ2 ≧. 4A to 4C, θ1>θ2> θ
3 is shown.

In a set, a so-called short iron having a large loft angle is difficult to slice even for a beginner and is relatively easy to hit in a target direction. Accordingly, only golf clubs having a low loft angle, such as middle or long irons having a loft angle of 40 ° or less, preferably 35 ° or less, more preferably 30 ° or less in the set,
The head 1 whose face line groove 4 is inclined with respect to the horizontal line N may be mounted.

Although the embodiment of the present invention has been described in detail above, for example, when a set is formed, it can be suitably used as a so-called utility club set.

[0026]

EXAMPLE An iron golf club set was prototyped according to the specifications shown in Table 1, and a test hit test was conducted by three right-handed beginner golfers having handicap of 36, 30, and 27, respectively. In the test hit test, each golfer hit five golf balls at a time for each golf club, and the amount of deviation from the target direction (right deviation +, left deviation-displayed) was represented by an arithmetic mean value of five times. In addition, each of the golf clubs had a common feature that the groove depth of the face line groove was 0.35 mm, the groove width was 0.7 mm, and the interval between the grooves was 3.6 times the groove width. The specifications of the set are shown in Table 1 and the test results are shown in Table 2. From the results, it can be seen that in the example, the rightward shift amount was significantly reduced, and the slice and the hitting ball in the rightward direction were reduced. It was confirmed that it was reduced.

[0027]

[Table 1]

[0028]

[Table 2]

[0029]

As described above, according to the first or third aspect of the present invention, all the face line grooves are inclined upward from the heel side to the toe side to close the face surface from the target direction. Even when the camera is held in the (covered) state, the direction indicated by the face line groove is largely deviated to the left from the target direction as compared with the related art, and it is possible to reduce a sense of discomfort when the player holds the camera. . This allows
Helps to swing easily and stabilizes the direction of the hit ball. In addition, when the player correctly holds the face in the target direction without closing the face, the lie angle looks large, so that the number of slices is reduced from the psychological side, which helps stabilize the directionality of the hit ball.

According to the second aspect of the present invention, the boundary line on the toe side and the boundary line on the heel side indicating the end on the toe side and the heel side of the ball hitting area, respectively, are orthogonal to the horizontal line extending substantially on the face surface. By doing so, it is possible to reduce the sense of incongruity when holding, and to further stabilize the directionality of the hit ball.

In the invention according to claims 4 and 5,
Since the inclination angle θ of the face line groove 4 can be increased as the head has a smaller loft angle, it is possible to provide a golf club set capable of suppressing slicing through all counts.

[0032]

[Brief description of the drawings]

FIG. 1 is a front view of a head according to an embodiment of the present invention in a reference state.

FIG. 2 is a plan view showing a state in which the head of the embodiment is held with the face surface closed.

FIG. 3 is a front view of a head showing another embodiment.

FIG. 4 is a partial front view of a golf club exemplified by extracting a part from an iron golf club set.

FIG. 5 is a front view illustrating a conventional head.

FIG. 6 is a plan view showing a state in which a conventional head is held with its face surface closed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head 2 Head main body 2a Face surface 4 Face line groove 5 Ball hitting area L1 Toe side boundary line L2 Heel side boundary line G Golf club

Claims (5)

[Claims] 1. A golf club head having a plurality of face line grooves extending substantially in parallel on a face surface, wherein all of the face lines are provided in a reference state in which the head is solely formed on a horizontal plane at a lie angle. A golf club head, wherein the groove is inclined upward from the heel side to the toe side, and an inclination angle θ of the face line groove with respect to a horizontal line on the face surface is 0.5 ° or more. 2. The face surface has a substantially ball hitting area in which the face line groove is recessed, and the ball hitting area has a toe side boundary indicating a toe side end and a heel side end, respectively. 3. The golf club head according to claim 1, wherein a line and a boundary line on the heel side are substantially orthogonal to the horizontal line in the reference state. 3. The inclination angle θ is 0.5 ° or more and 3.
3. The golf club head according to claim 1, wherein the golf club head is less than 0 [deg.] And is an iron type. 4. An iron golf club equipped with the golf club head according to claim 3, wherein the golf club head has the smallest loft angle and the highest golf club having the largest loft angle. A golf club set including n golf clubs (where n is an integer of 3 or more) up to the golf club, wherein the inclination angle θa of the face line groove of the golf club of an arbitrary golf club and A golf club set, wherein the inclination angle θb of the face line groove of the golf club having a large loft angle satisfies the relationship of θa ≧ θb. 5. When the inclination angles of the face line grooves are represented by θ1, θ2,..., Θn in the order of the number from the lowest golf club to the highest golf club, θ1> θn and The golf club set according to claim 4, wherein a relationship of θ1 ≧ θ2 ≧ ... ≧ θn is satisfied.