JP2006288882A - Wood club head and golf club having it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wood club head and a golf club having it, varying specific characteristics such as the distance from the shaft axis to the center of gravity and inertia moment around shaft axis while maintaining the other weight characteristics. <P>SOLUTION: This wood club head includes: a head body 51; a plane P provided on the head body 51 and defined by the axis O of a shaft 9 and the center of gravity G of the head body 51; and weights 11, 12 respectively disposed on the toe part 5 side and the heel part 2 side on an intersecting line R of the sole part 4 and the side part 8 of the head part body 51. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wood head club and a golf club including the same.

  It is known that there are two major groups of wrist movements just before a golfer's impact. That is, there are a group that makes the wrist suddenly immediately before the impact, and a group that makes the wrist gently, and a group that gently returns the wrist from the top of the swing to the impact.

  These two groups exist regardless of the golfer's technical proficiency and physical skill (ie head speed). Also, for golfers that return their wrists suddenly, the moment of inertia of the golf club around the shaft axis is reduced in order to increase the controllability of the club (in the head, the distance between the shaft axis and the center of gravity of the head (= below) (Represented as the heavy axis distance) is preferable. For golfers that gently return their wrists, increase the moment of inertia of the golf club around the shaft axis in order to suppress variations in the orientation of the face during impact ( It is known that it is preferable to increase the distance between the heavy axes in the head.

  However, in the past, it was recognized that skilled people would return their wrists sharply and beginners would gently return their wrists, so those with a short heavy axis distance would have a lower loft, a smaller sweet area, and a higher center of gravity. A large number of heads are set, and a long heavy axis distance has a large loft, a large sweet area, a low center of gravity, and many heads that are said to be suitable for beginners, and there are clubs suitable for individual golfers That wasn't true.

  Therefore, conventionally, particularly in a wood club head, attempts have been made to adjust the heavy axis distance by attaching weights to the toe side and the heel side portion of the head portion.

For the purpose of adjusting the position of the center of gravity, the magnitude of the moment of inertia, and the like, a weight is also arranged at a specific part of the wood club head. For example, Japanese Patent Application Laid-Open No. 2001-597 aims to control the angle of inclination of the inertial spindle, but a toe tip weight member is provided on the side part of the toe part of the wood club head, and the back part and heel part of the sole part are provided. Describes a golf club provided with a sole back center weight member in the vicinity thereof.
JP 2001-597 A

  However, according to the conventional golf club described above, by providing the weight, the head characteristics other than the target heavy axis distance, for example, the value of the moment of inertia in the vertical direction and the horizontal direction, the height of the center of gravity, and the depth of the center of gravity change simultaneously. Even if you are satisfied with the controllability of the golf club related to turning your wrist, the performance of the club before adjustment, such as the sweet area size, launch angle, ballistic height, etc. It had a problem that it was different from that before adjustment.

  The present invention has been made in view of the above problems, and its object is to largely change only the heavy axis distance and the inertia moment of the head around the shaft axis affected by this while suppressing fluctuations in other characteristics. It is to provide a wood club head and a golf club head that can.

  In one aspect, the wood club head according to the present invention is on the intersection of the head portion main body, a plane defined by the axis of the shaft connected to the head portion main body and the center of gravity of the head portion main body, and the head portion main body. Weights disposed on the toe side and the heel side, respectively. Preferably, the weight is disposed on the side portion on the toe portion side and the sole portion on the heel side on the intersection line. Preferably, the plane is parallel to a first plane defined by the head unit main body, the axis of the shaft connected to the head unit main body, and the center of gravity of the head unit main body, and is 25 mm from the first plane to the back unit side. A second plane located within the range, and weights arranged on the toe side or the heel side on the line of intersection with the head body. Preferably, the weight is disposed on the side portion on the toe portion side and the sole portion on the heel portion side on the intersection line. In one aspect, the golf head club according to the present invention includes the wood club head.

  According to the wood club head and the golf club thereof according to the present invention, the distance from the shaft axis to the center of gravity and the moment of inertia around the shaft axis can be adjusted, and other characteristics can be maintained before and after the adjustment. .

  The golf club head and golf club according to the present embodiment will be described with reference to FIGS.

  FIG. 1 is a perspective view of a wood fluff head according to the present embodiment. As shown in FIG. 1, the golf club 1 includes a wood club head 50 and a shaft 9 connected to the wood club head 50.

  FIG. 2 is a perspective view of the wood club head 50. As shown in FIG. 2, the wood club head 50 includes a head part main body 51 and weights 11 and 12 provided on the head part main body 51. As shown in FIG. 1, the head portion main body 51 includes a heel portion 2, a face portion 3, a sole portion 4, a toe portion 5, a crown portion 6, a back portion 7, and a side portion 8. Yes. The head body 51 has an outer shell structure and is formed in a hollow shape. The head body 51 is typically formed of an α-β titanium alloy represented by Ti-6Al-4V and a β titanium alloy represented by Ti-15V-3Cr-3Sn-3Al. However, other than this, it is made of a single material or a combination of materials such as pure titanium, aluminum alloy, soft iron, stainless steel alloy and beryllium copper.

  The sum of the mass of the weight 11 and the mass of the weight 12 shown in FIG. 2 is constant, and the mass of the wood club head 50 is kept constant. FIG. 3 is a diagram showing an intersection line between a plane P defined by the axis O of the shaft 9 and the center of gravity G of the head body 51 and the outer peripheral edge of the outer shell of the head body 51. In FIG. 3, the plane P is defined by the shaft axis O and the center of gravity G of the head portion main body 51, and the intersection line R indicated by the one-dot chain line is the plane P and the head portion main body 51. The line of intersection. A weight 11 shown in FIG. 2 is disposed at a position Q1 of the side portion 8 on the toe portion 5 side of the intersection line R, and a weight 12 shown in FIG. 2 is located at a position Q2 of the sole portion 4 on the heel portion 2 side. Has been placed. In FIG. 3, the center of gravity G, the position Q1, and the position Q2 are preferably arranged on a straight line. However, depending on the shape of the head portion main body 51, the position Q1 and the position Q2 have an intersection line R. You may arrange | position in the position shifted | deviated slightly along.

  As shown in FIG. 2, the head portion main body 51 is formed with storage portions 11a and 12a in which the weights 11 and 12 are stored at the positions Q1 and Q2 shown in FIG. Weights 11 and 12 are detachably disposed in the storage portions 11a and 12a.

  FIG. 4 is a diagram in which the sole side of the wood club head 50 is projected onto a plane perpendicular to the axis O of the shaft of the wood club head 50. As shown in FIG. 4, the weight 11 is disposed on the side line 8 on the toe part 5 side and the sole part 4 on the heel part 2 side on the intersection line between the plane P1 and the head part main body 51. . In FIG. 4, the distance between the plane P and the back portion 7 of the head portion main body 51 is about 55 mm.

  FIG. 5 is a view showing a first modification of the wood club head 50 shown in FIG. 4, and is a view in which the sole side of the wood club head 50A is projected onto a plane perpendicular to the axis O1 of the shaft. As shown in FIG. 5, the wood club head 50 </ b> A includes a head portion main body 51 </ b> A and weights 11 and 12. And it is a plane parallel to a plane (first plane) P1 defined by the axis O1 of the shaft provided in the head section main body 51A and the center of gravity G1 of the head section main body 51A, and from the plane P1 to the back section 7 side. The weights 11 and 12 are arranged on the intersection line between the plane (second plane) P2 arranged at a position 15 mm apart from the side and the side part 8 and the sole part 4 of the head part main body 51A. The weight 11 is disposed at the position of the side portion 8 on the toe portion 5 side in the intersection line between the plane P2 and the head portion main body 51. Further, the weight 12 is arranged at the position of the sole portion 4 on the heel portion 2 side in the intersection line between the plane P2 and the head portion main body 51.

  FIG. 6 is a view showing a second modification of the wood club head 50 shown in FIG. 4, and is a view in which the sole side of the wood club head 50B is projected on a plane perpendicular to the axis O1 of the shaft. As shown in FIG. 6, in the wood club head 50B, the plane P2 is arranged at a position 30 mm away from the plane P1 toward the back portion 7 side. The weight 11 is disposed at the position of the side portion 8 on the toe portion 5 side of the intersection line between the plane P2 and the head portion main body 51. Further, the weight 12 is disposed at the position of the sole portion 4 on the heel portion 2 side in the intersection line between the plane P2 and the head portion main body 51.

  The wood club heads 50, 50A, and 50B according to the present embodiment are each formed with one storage for storing the weights 11 and 12, but the present invention is not limited to this. For example, in FIGS. 5A and 5B, the storage portions 11a and 12a include a plane P2 and a head portion main body that are arranged on the intersection line between the plane P1 and the side portion 8 and the sole portion 4 of the head portion main body 51A and at a position separated from the plane P1. It may be formed at a plurality of locations on the intersection line with the side portion 8 and the sole portion 4 of 51A.

  Table 1 below shows the head mass, the UD moment of inertia (the moment of inertia in the vertical direction), and TH for the wood club head 50, and the wood club head 50A in which the distance between the plane P1 and the plane P2 is 15 mm, 30 mm, and 40 mm. Measurement results of measuring moment of inertia (moment of inertia in the toe-heel direction), G height (height of center of gravity), heavy axis distance, G depth (depth of center of gravity), and moment of inertia around the shaft axis It is a table | surface which shows.

  Here, the center of gravity depth is the distance from the face portion 3 of the wood club head 50 to the center of gravity G in FIG. The shaft inertia M means a moment of inertia around the axis of the shaft.

  And the sum of the masses of the weights 11 and 12 is constant, the mass of the weight 11 is 12.5 mg, the mass of the weight 12 is 2.5 mg, the mass of the weight 11 is 2.5 mg, and the mass of the weight 12 is Each measurement was performed for the case of 12.5 mg. For comparison, the specifications of the wood club head when 7.5 g of mass was distributed to the weights 11 and 12 were also measured. The result is shown in the column of equal mass distribution in Table 1.

  As shown in Table 1 above, the wood club head 50 and the wood club head 50A in which the distance between the plane P1 and the plane P2 is 15 mm and 30 mm are interchanged by changing the mass distribution of the weight 11 and the weight 12. The heavy axis distance can be increased or decreased. Further, the wood club head 50 and the wood club head 50A in which the distance between the plane P1 and the plane P2 is 15 mm and 30 mm can adjust the moment of inertia around the shaft axis, similarly to the heavy axis distance. I understand. Thereby, the return easiness of a ball | bowl and the catch degree of a ball | bowl can be fluctuate | varied according to a user.

  FIG. 7 is a graph showing a change rate of each characteristic of the wood club heads 50 and 50A when the mass distribution of the weight 11 and the weight 12 is switched. In the graph shown in FIG. 7, the horizontal axis represents the distance between the plane P1 and the plane P2, and the vertical axis represents the rate of change of each characteristic.

  Here, the heavy axis distance of a general golf club head for a driver is often in the range of about 25 mm to 40 mm, but in particular, there are many in the range of 28 mm to 32 mm. As a result of performing a sensory test on a golf club having such a general golf club head for a driver while changing the heavy axis distance, the user recognizes a difference in controllability of the golf club at the time of hitting the ball. It has been found that a difference of 3 mm or more is necessary. This is a difference of about 10% in the wood club head 50A shown in FIG. As shown in FIG. 7, it can be seen that the range in which the difference of 10% or more in the heavy axis distance occurs is that the distance between the plane P1 and the plane P2 is about 0 mm to 25 mm.

  Further, as shown in FIG. 7, when the distance between the plane P1 and the plane P2 is in the range of 0 mm to 25 mm, fluctuations in the values of the moment of inertia in the vertical direction and the horizontal direction, and the height of the center of gravity and the depth of the center of gravity are kept small. It can be seen that fluctuations in performance such as the size of the sweet area, the launch angle of the hit ball, and the height of the trajectory are suppressed.

  On the other hand, it can be seen that the moment of inertia of the shaft axis sharply decreases when the distance between the plane P1 and the plane P2 exceeds about 30 mm. It can also be seen that the moment of inertia in the vertical direction increases rapidly from around the vicinity of 20 mm.

  That is, in FIG. 5, the plane P2 is preferably arranged at a position within the range of 0 mm or more and 25 mm or less from the plane P1 to the back portion 7 side. The weight 12 is disposed in such a range, and is disposed at the position of the sole portion 4 on the heel portion 2 side, which is an intersection line between the plane P2 and the head body 51, and the weight 11 is disposed between the plane P2 and the plane P2. Further, it is preferably arranged on the side portion 8 on the toe portion 5 side, which is a line of intersection with the head portion main body 51. Furthermore, it is preferable that the plane P2 is disposed at a position within the range of 0 mm or more and 20 mm or less from the plane P1 to the back portion 7 side.

  As shown in Table 1, in the wood club head 50A in which the distance between the plane P1 and the plane P2 is 15 mm, even when the mass distribution of the weight 11 and the weight 12 is changed, the vertical moment of inertia In addition, fluctuations in the height of the center of gravity are kept small, and fluctuations in other characteristics are also kept small. For this reason, even when the mass distribution of the weight 11 and the weight 12 is changed, it is possible to suppress changes in ballistic height and the like. In FIG. 7, when the distance between the plane P1 and the plane P2 exceeds the vicinity of 15 mm, the height of the center of gravity sharply decreases. Therefore, the plane P2 is 0 mm or more and 15 mm or less from the plane P1 to the back portion 7 side. It is preferable to arrange at a position within the range.

  By arranging the weights 11 and 12 within such a range, the heavy axis distance of the wood club head 50 can be adjusted, and the user can recognize the ease of returning the ball and the degree of catching the ball. Can be adjusted clearly. Furthermore, before and after the adjustment of the heavy axis distance, fluctuations in performance such as the size of the sweet area, the launch angle of the hit ball, and the height of the trajectory can be suppressed.

  If the weight 12 is disposed in the vicinity of the shaft axis O, the shaft and the weight 12 may interfere with each other. For this reason, the weights 11 and 12 are arranged on the intersection line between the plane P2 arranged at a position slightly separated from the plane P1 and the sole part 4 and the side part 8, and on the toe part 5 side and the heel part 2 side. Preferably they are arranged.

  In addition, since the weights 11 and 12 are detachably attached to the head body 51, by selecting a combination of the masses of the weights 11 and 12, the user can control the ease of returning the ball and the degree of catching the ball. It can be adjusted to suit. When a plurality of storage portions 11 a and 12 a for the weights 11 and 12 are formed, various adjustments can be made depending on the positions where the weights 11 and 12 are stored and the masses of the weights 11 and 12.

  Although the embodiments of the present invention have been described as above, the embodiments disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention is suitable for a wood club head and a golf club.

It is a perspective view of the wood fclub head concerning this embodiment. It is a perspective view of a wood club head. It is the figure which showed the intersection line of the plane P and the outer-periphery edge part of the outer shell of a head part main body. It is the figure which projected the sole side of the wood club head on the plane perpendicular to the shaft of the wood club head. . It is a figure which shows the 1st modification of the wood club head shown by FIG. It is a figure which shows the 2nd modification of the wood club head shown by FIG. It is a graph which shows the change rate of each characteristic of a wood club head when the mass distribution of a weight and a weight is replaced.

Explanation of symbols

  1 golf club, 2 heel part, 3 face part, 4 sole part, 5 toe part, 6 crown part, 6a crown member, 7 back part, 8 side part, 9 shaft, 11a, 12a storage part, 50 wood club head, 51 Head body, P plane.

Claims (5)

A head body (51);
The plane (P) defined by the axis (O) of the shaft (9) connected to the head body (51) and the center of gravity (G) of the head body (51) and the head body (51) Weights (11, 12) respectively disposed on the toe part (5) side and the heel part (2) side on the line of intersection (R) with
Wood club head with   The weights (11, 12) are arranged in a side part (8) on the toe part (5) side and a sole part (4) on the heel (2) side on the intersection line (R). Wood club head as described. A head body (51A);
A plane parallel to a first plane (P1) defined by the axis (O1) of the shaft (9) connected to the head body (51A) and the center of gravity of the head body (51A), From the first plane (P1) to the back section (7) side, the second plane (P2) located within a range of 25 mm and the toe section (5) side or heel on the intersection of the head body (51A) 2) Weights (11, 12) respectively arranged on the part side;
Wood club head with   3. The weight (11, 12) is arranged on a side part (8) on the toe part (5) side and a sole part (4) on the heel part (2) side on the intersecting line. Wood club head.   A golf club comprising the wood club head according to any one of claims 1 to 4.

Images