JP4599662B2 - Golf club head - Google Patents

Golf club head Download PDF

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Publication number
JP4599662B2
JP4599662B2 JP2000167797A JP2000167797A JP4599662B2 JP 4599662 B2 JP4599662 B2 JP 4599662B2 JP 2000167797 A JP2000167797 A JP 2000167797A JP 2000167797 A JP2000167797 A JP 2000167797A JP 4599662 B2 JP4599662 B2 JP 4599662B2
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JP
Japan
Prior art keywords
sole
club head
golf club
sole portion
width
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.)
Expired - Fee Related
Application number
JP2000167797A
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Japanese (ja)
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JP2001340501A (en
Inventor
秀夫 島崎
Original Assignee
ブリヂストンスポーツ株式会社
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.)
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Publication of JP2001340501A publication Critical patent/JP2001340501A/en
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a metal golf club head having an improved shape of a sole portion.
[0002]
[Prior art]
In conventional metal golf club heads, the width of the sole is often determined in accordance with the size of the head. For example, in an iron club, since the length is shortened as the count is increased, the sole width is designed to be increased so that the weight of the golf club head is increased as the count is increased in order to equalize the swing balance. .
[0003]
[Problems to be solved by the invention]
In general, in a golf club head having a small loft angle called a long iron, the head volume is reduced in order to set the same swing balance as that of the short iron, and the sole width is also small. For this reason, there is a problem that the center of gravity of the head becomes high and the ball is difficult to rise.
[0004]
In view of this problem, by attaching a so-called utility club head, a metal golf club head having a hollow portion, which is an intermediate golf club head between a wood and an iron, a sole width is increased compared to an iron, and a low center of gravity. A utility club has been developed.
[0005]
However, in the above-mentioned utility club, since the sole width of the head is large, when hitting a golf ball in the rough where the turf is elongated, the resistance of the turf is greatly received by the wide sole portion and it may be difficult to hit.
[0006]
The present invention is to solve such problems of the conventional long AIA emissions, even loft angle 27 ° or less of the golf club head, to provide a low center of gravity, yet not susceptible golf club head the resistance of the turf With the goal.
[0007]
[Means for Solving the Problems]
The golf club head of the present invention is a metal golf club head, which is located on the back side, as a sole portion on the bottom surface of the golf club head, a first sole portion S 1 for contacting the ground located on the face side. , first second sole part is formed in the upper than the sole portion has a S 2, the first sole width W 1 of the sole portion S 1 is the second sole portion S 2 sole width in the face center A golf club head larger than W 2 , wherein the golf club head is an iron club head, W 1 is 15 to 25 mm, and the overall width of the sole portion is 20 to 35 mm . A step is provided between the first sole portion S 1 and the second sole portion S 2 .
[0008]
By providing such a second sole portion S 2, expanding the sole width, it is possible to deepen the centroid, even hit the ball removed from the sweet spot, the flight distance and direction of the ball becomes stable . Further, the second sole portion S 2 is for positioning the upper than the first sole portion S 1, less subject to resistance of the turf.
[0009]
According to the present invention, in particular Oite loft angle is called long AIA emissions of 27 ° or less, without increasing the resistance of the turf, lower the center of gravity, to obtain a good blow function.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a golf club head of the present invention will be described in detail with reference to the drawings.
[0011]
1 to 4 are views showing an iron head according to an embodiment of the present invention. FIG. 1 is a front view, FIG. 2 is a cross-sectional view taken along the line II-II (face center position) in FIG. 4 and 4 are enlarged views of the sole portion of FIG. FIG. 5 is a cross-sectional view (a cross-sectional view along the face center position) showing a utility club head according to a reference example .
[0012]
As shown in FIGS. 1 to 5, the sole portion S of the golf club heads 1 and 2 is located on the face portion F side, and the ground line G. A first sole portion S 1 in contact with L, and a back side of the first sole portion S 1 . A second sole portion S 2 which are not in contact L, and is composed of a chamfer M, first sole portion S 1 of the sole width (hereinafter sometimes referred to as "first sole width".) W 1 second sole The sole width of the portion S 2 (hereinafter sometimes referred to as “second sole width”) is greater than W 2 .
[0013]
The first sole portion S 1 is a ground line G.P. A sole surface in contact L, and second sole portion S 2 is a sole surface of the rear of the first sole portion S 1. The second sole portion S 2 also includes stepped slope of the first immediately behind the sole portion S 1.
[0014]
In this embodiment, the chamfered portion M is provided at the leading edge portion where the face portion F and the sole portion S intersect. This is to prevent the ball from being damaged when it is topped. First sole width W 1 is the width excluding the chamfered portion M.
[0015]
In the present invention, the sole width of the golf club head, as shown in FIG. 1, is measured with reference to the position of the face center in the lateral direction when set golf club 1 normal lie angle theta 2. In the case of an iron head or a utility club head, the center of the width in the left-right direction of a corrugation (groove) C generally formed in the hitting portion of the face surface is defined as a face center L. In the case of a wood head, it is set to a normal lie angle and the G. The contact point with L (ground line) is the face center.
[0016]
When the first sole width W 1 is smaller than the second sole width W 2, the center of gravity of the golf club head is excessively becomes the rear, the golf club head is likely to fall to the rear. That is, when the player addresses to hit the ball and touches the golf club head to the ground, the head feels a sense of incongruity like a subtle retreat. Accordingly, the present invention has a first width sole W 1 larger than the second width sole W 2.
[0017]
It should be noted that, when the first sole width W 1 is too wide, turf of resistance is increased when the hit the rough of the ball extending the turf. Further, in a large short irons loft angle, it is possible to swing to drive the golf club head from above, when the first sole width W 1 is too wide, the sole portion is repelled on the ground, it is easy to top Become.
[0018]
For this reason, the first sole width W 1 is a 15~25mm For iron head 1 normal. In the case of the utility club head 2 having the hollow portion 2A, 22 to 35 mm is preferable. This range is almost the same as the sole width of a normal iron head, and is a range where swinging can be performed without a sense of incongruity.
[0019]
Total width of the sole S, i.e., the first sole width W 1, the second sole width W 2 and the width of the chamfered portion M (hereinafter sometimes referred to as "chamfer width".) The total width W of the W 3 being , and 20~35mm case of a Ian head 1. In the case of a utility club head , 30 to 60 mm is preferable.
[0020]
It should be noted that the chamfer width W 3 is usually about 0.5~2.0mm is preferable.
[0021]
As described above, loft angle 27 ° or less, especially 22 ° or less of the golf club head, since it is preferable to lower the center of gravity of the case of the iron head, it is preferable that the second sole width W 2 to 3mm or more than 6mm . In the case of utility club head, it is preferable that the second sole width W 2 in particular more than 10 mm 15 to 20 mm.
[0022]
In the present invention, as shown in FIGS. 1 to 5, it provided the first and sole portion S 1 a step D between the second sole portion S 2. The step D is preferably 0.5 mm or more, particularly 0.8 mm or more, and is preferably 5 mm or less, particularly 3 mm or less.
[0023]
When the level difference D is too small, also the second sole portion S 2 will be grounded, the effect is to sufficiently obtain the present invention in which the second sole part for deep center of gravity is so less susceptible to resistance of grass I can't. If this level difference D is too large, the appearance will be worse and the center of gravity of the head will be higher, which is not preferable. Accordingly, the step D is preferably 0.5 to 5 mm, particularly preferably 0.8 to 3 mm.
[0024]
Incidentally, the stepped slope of the first sole portion S 1 toward the second sole portion S 2, when the boundary is clear as shown in FIG. 4 (b) of the second sole portion S 2 of the flat surface subsequent thereto is a step D the height difference between the boundary and the first sole portion S 1. Figure 4 step surface becomes more curved slope as (a), the and when the boundary is unclear in the slope and a flat sole surface, the inclined surface of the first sole portion S 1 toward the second sole portion S 2 A point 1 mm before and after the inflection point P is taken, and the difference in height is defined as a step D. Further, when the inflection point is difficult to understand, the step D is defined as the place where the width difference is 2 mm and the height difference is the largest.
[0025]
According to a second sole portion S 2 is, go to the back side, G. It is preferable that the surface has an inclined surface away from L because it is less likely to be caught by the back portion during swinging and can swing smoothly.
[0026]
Sole of the heel side may be recessed from the first sole portion S 1, as shown in FIG. 3, may be formed sole portion S 3 of the heel side to the second sole portion S 2 of the same surface . In this way, especially when hitting a rough ball, there is little turf trapping and swinging can be performed very smoothly.
[0027]
In the present invention, the place that is most likely to touch the ground during a swing is slightly above the heel H from the sole center, so that the overall width W of the sole is when the narrower one on the heel H side contacts the ground than the toe T side This is preferable because of its low resistance. In particular, for the first sole shape of the sole unit S 1, better width of the heel H side is narrower than the toe T side.
[0028]
In the iron head, by which is extended a second sole portion S 2, the weight of the head is increased to form a recess (cavity portion) 1A to the back of the face portion F, the weight reduction as a so-called cavity iron head It is preferable to try.
[0029]
In the case of a golf club set such as an iron set, normally, a 3rd iron to a 9th iron, a pitching wedge, and a sand wedge are included. In the present invention, since a club that hits a ball from a fairway is an application target, only those from the 3rd iron to the pitching wedge are set as an iron set.
[0030]
In the case of a utility club, there are various combinations and a wide range of loft angles. In the reference example, the loft angle theta 1 is a utility golf club set a set of configured utility clubs in the range of 15 ° to 48 °.
[0031]
This is a golf club set, the first difference in sole width W 1 2 mm or less for each golf club head, in particular by a 1.5mm or less, it is possible to obtain a unity as a set.
[0032]
【Example】
The effects of the present invention will be described more specifically with reference to the results of actual hit tests using a golf club having the golf club head of the present invention and a golf club according to a comparative example.
[0033]
[Actual hit test 1: cavity iron set]
<Example 1>
Golf club heads from No. 3 iron to pitching wedge (PW) having the structure shown in FIGS. 1, 2, 3, and 4 (a) were manufactured using stainless steel SUS630. A cavity having a depth of 4 mm was provided on the rear rear surface of the head. A step of 0.8 mm was provided between the first sole portion and the second sole portion, and the heel side of the sole portion was made to be flush with the second sole portion. The specifications of each part of the iron head of Example 1 are shown in Table 1 below.
[0034]
A carbon shaft was attached to each head to make an iron. The length of each golf club is as follows.
3 iron; 99cm (39 ")
4 iron; 97.8cm (38.5 ")
5 iron; 96.5cm (38 ")
6 iron; 95.3cm (37.5 ")
7 iron; 94.0cm (37 ")
8 iron; 92.7cm (36.5 ")
9 iron; 91.5cm (36 ")
PW: 90.2 cm (35.5 ")
[0035]
[Table 1]
[0036]
<Comparative Example 1>
As Comparative Example 1, an iron head having only the first sole portion was manufactured according to the specifications shown in Table 2 below, and the same shaft as that of Example 1 was attached to form an iron club.
[0037]
[Table 2]
[0038]
The actual hit results of the club of Example 1 of the present invention and the club of Comparative Example 1 will be described. In particular, the evaluation was high for a long iron head, and the No. 3 iron (I # 3) to which the iron head of Example 1 of the present invention was attached was likely to raise the ball. Moreover, even if the ball was rough, it was difficult to receive the great resistance of the grass on the sole, and it was possible to swing smoothly and hit the ball. On the other hand, in the club of Comparative Example 1, the ball was slightly difficult to rise, and the ball that entered the rough was subjected to turf resistance and could not hit the ball well from the rough.
[0039]
Moreover, in Example 1, since the sole width | variety of a 1st sole part is narrow in Example 1, it can be driven easily and various hitting methods can be performed, and when a ball enters a bunker or the like, 2 It was evaluated that it was easy to handle because the sole part worked and slipped on the sand. On the other hand, it was evaluated that the club of Comparative Example 1 was slightly difficult to work on how to hit.
[0040]
Further, in Example 1, since the width of the sole (the width of the first sole) is constant in the entire club set, the feel when the ball is hit from the rough is unified.
[0041]
[Actual test 2: Utility club set]
< Reference Example 1>
A utility club head, was fabricated using a stainless steel SUS630. The utility iron head has a hollow portion as shown in FIG. In the case of utility club heads, the volume of the smaller golf club head was increased by providing a hollow portion, and efforts were made to expand the sweet area. A step of 1.5 mm is provided from the first sole part to the second sole part, and the second sole part is inclined upward as it goes to the back side.
[0042]
Utility clubs are generally positioned as intermediate clubs between irons and wood, and are used as substitutes for long irons by general golfers with low head speeds. Therefore, in Reference Example 1 , a set of utility iron heads of Nos. 2 to 4 was created.
[0043]
The specifications of the head of Reference Example 1 are shown in Table 3 below.
[0044]
A carbon shaft of the following length was attached to each head to form a utility club.
[0045]
2nd; 104cm (41 inches)
No. 3; 101.5cm (40 inches)
No.4; 99cm (39 inches)
[0046]
[Table 3]
[0047]
<Comparative example 2>
A utility club head having a second sole width wider than the first sole width was manufactured according to the specifications shown in Table 4 below, and the same shaft as in Reference Example 1 was attached to form a utility club head.
[0048]
[Table 4]
[0049]
<Comparative Example 3>
A utility club head consisting of only the first sole portion without the second sole portion was manufactured according to the specifications shown in Table 5 below, and the same shaft as in Reference Example 1 was attached to form a utility club head.
[0050]
[Table 5]
[0051]
As a result of a trial hit comparison between the utility club of Reference Example 1 and the utility club of Comparative Example 2, the utility club of Comparative Example 2 was difficult to stabilize because it was easily tilted backward when addressed. In Reference Example 1 , the sole portion sat satisfactorily on the ground and was stable.
[0052]
Next, a trial hit comparison between the utility club shown in Reference Example 1 and the utility club of Comparative Example 3 was performed. As a result, when hitting a semi-rough ball with the turf slightly extended from the fairway, the reference example 1 has less resistance from the turf on the sole portion than the comparative example 3, and hits a middle iron. It was easy to beat. In addition, since the width of the sole is constant, the resistance applied to the sole is almost the same in each club, and the hit feeling is unified.
[0053]
【The invention's effect】
As described above in detail, according to the present invention, a golf club head having a low center of gravity and being less susceptible to turf resistance even with a loft angle of 27 ° or less is provided. According to the club provided with this golf club head, the flight distance can be extended as compared with the conventional product, and the ball can be hit accurately in various ways from various situations.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a golf club head of the present invention.
2 is a cross-sectional view taken along line II-II in FIG.
3 is a bottom view of the golf club head of FIG. 1. FIG.
4 is an enlarged view of a bottom portion of the head shown in FIG. 2. FIG.
FIG. 5 is a cross-sectional view showing another embodiment of a golf club head of the present invention.
[Explanation of symbols]
1, 2 Golf club head 1A Concave part 2A Hollow part F Face part M Chamfered part S Sole part S 1 1st sole part S 2 2nd sole part

Claims (5)

  1. In a metal golf club head,
    As the sole portion of the bottom surface of the golf club head, a first sole portion S 1 for contact with the ground located on the face side, a second sole located on the back side, which is formed in the upper than the first sole Department has a S 2,
    The sole width W 1 of the first sole portion S 1 in the face center is a large golf club head than the sole width W 2 of the second sole portion S 2,
    The golf club head is an iron club head, W 1 is 15 to 25 mm, and the entire width of the sole portion is 20 to 35 mm.
    The golf club head, wherein a step is provided between the first and sole portion S 1 and the second sole portion S 2 in the face center.
  2.   2. The golf club head according to claim 1, wherein the loft angle is 27 [deg.] Or less.
  3. In Claim 1 or 2 , the curved slope is provided between the 1st sole part and the 2nd sole part,
    The step is
    The height of the slope at a position 1 mm away from the inflection point of the slope on the side of the horizontal face relative to the first sole portion;
    A golf club head characterized by a difference in height from a slope at a position spaced 1 mm from the inflection point to the first sole portion on the horizontal back side.
  4. In any one of claims 1 to 3, the golf club head the entire sole of the heel side of the golf club head, characterized in that it is formed by the second sole portion S 2 in the same plane.
  5. In any one of claims 1 to 4, a golf club head, wherein the stepped difference is 0.5 to 5 mm.
JP2000167797A 2000-06-05 2000-06-05 Golf club head Expired - Fee Related JP4599662B2 (en)

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JP4599662B2 true JP4599662B2 (en) 2010-12-15

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4657484B2 (en) * 2001-04-02 2011-03-23 Sriスポーツ株式会社 Golf club head and golf club
JP2005334648A (en) 2004-04-21 2005-12-08 Acushnet Co Transitioning hollow golf clubs
US7137903B2 (en) * 2004-04-21 2006-11-21 Acushnet Company Transitioning hollow golf clubs
US7153219B2 (en) * 2004-06-14 2006-12-26 Adams Golf Ip, L.P. Golf club head
JP5220455B2 (en) * 2008-03-28 2013-06-26 美津濃株式会社 Golf club head and golf club
US20160067558A1 (en) * 2014-09-04 2016-03-10 Dunlop Sports Company Limited Article with metallic strip and method of making same
JP5928643B1 (en) * 2015-07-31 2016-06-01 株式会社プロギア Golf club head
JP5950065B1 (en) * 2016-02-09 2016-07-13 株式会社プロギア Golf club head

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS533667U (en) * 1976-06-24 1978-01-13
JPS5592362U (en) * 1978-12-21 1980-06-26
JPH0731073U (en) * 1993-11-17 1995-06-13 ダイワゴルフ株式会社 Set of golf clubs
JPH07299164A (en) * 1994-05-09 1995-11-14 Toshimi Ebisawa Iron club head for wedge shot
JPH08257179A (en) * 1995-03-10 1996-10-08 Acushnet Co Iron club or set of golf clubs
WO1999038576A1 (en) * 1998-02-03 1999-08-05 Purespin Golf Company, Inc. Golf club head with improved sole configuration
JPH11290489A (en) * 1998-04-08 1999-10-26 Sumitomo Rubber Ind Ltd Head of wood type golf club

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1204305A (en) * 1968-04-16 1970-09-03 Brunswick Corp Golf club heads

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS533667U (en) * 1976-06-24 1978-01-13
JPS5592362U (en) * 1978-12-21 1980-06-26
JPH0731073U (en) * 1993-11-17 1995-06-13 ダイワゴルフ株式会社 Set of golf clubs
JPH07299164A (en) * 1994-05-09 1995-11-14 Toshimi Ebisawa Iron club head for wedge shot
JPH08257179A (en) * 1995-03-10 1996-10-08 Acushnet Co Iron club or set of golf clubs
WO1999038576A1 (en) * 1998-02-03 1999-08-05 Purespin Golf Company, Inc. Golf club head with improved sole configuration
JPH11290489A (en) * 1998-04-08 1999-10-26 Sumitomo Rubber Ind Ltd Head of wood type golf club

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