JP2011135980A - Golf club - Google Patents

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JP2011135980A
JP2011135980A JP2009296906A JP2009296906A JP2011135980A JP 2011135980 A JP2011135980 A JP 2011135980A JP 2009296906 A JP2009296906 A JP 2009296906A JP 2009296906 A JP2009296906 A JP 2009296906A JP 2011135980 A JP2011135980 A JP 2011135980A
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side
portion
crown
sole
face
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JP5427598B2 (en
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Suketo Imai
資人 今井
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Globeride Inc
グローブライド株式会社
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Abstract

Provided is a golf club capable of improving the balance of resilience between a crown side and a sole side in the vicinity of the center position of a ball striking surface, and improving and stabilizing a flight distance.
A face portion 7a is formed such that a lateral length on a crown side is longer than a lateral length on a sole side. The face part has a thick part 20 at the center part, and has extension parts 21 and 22 extending from the thick part toward the crown side and the sole side, and a horizontal line P1 passing through the center position C of the face part. When the face portion is divided into the crown side and the sole side, the area obtained by adding the thick portion and the extension portion is wider on the crown side than the sole side, and is ±± from the center position C in the toe-heel direction. Within the range of 20mm and ± 15mm in the crown / sole direction, the average CT value at the equidistant position within the range of 10mm from the horizontal line to the crown side and the sole side is set on the crown side so that it is equal to or greater than the sole side. did.
[Selection] Figure 5

Description

  The present invention relates to a golf club, and more particularly, to a golf club having a hollow structure head.

  Conventionally, it has been known that the face portion of a metal head having a hollow structure can be easily bent to prevent the ball from being crushed at the time of hitting, thereby reducing the energy loss due to the deformation of the ball and improving the flight distance. It has been. Therefore, in order to improve the flight distance, the central region of the face portion may be configured to be easily bent, but the deflection of the face portion is regulated by rules.

  In other words, as a measure of the deflection of the face portion, there is a method of measuring in accordance with the USGA (American Golf Association) pendulum test. It has been generalized to evaluate the deflection of the part. Specifically, the CT value specifies the center of the face portion (hereinafter also referred to as the center position of the face portion) according to the above-described Pendulum test procedure, and the contact time when a predetermined test piece collides with the center position. Is used to evaluate the elasticity of the face part. If the CT value increases (the contact time becomes longer), the face part is easily bent and the flight distance of the ball can be improved. When the CT value at the center position of the face part exceeds a predetermined value, it is determined that the value does not conform to the rule.

  For this reason, in order to adjust the rigidity and resilience of the face part, for example, as disclosed in Patent Document 1, by forming an X-shaped rib on the back surface of the face part, While the resilience is regulated, the surrounding resilience is not reduced. In other words, since the center of the face portion is the most flexible region in terms of structure, the rib is formed so that the rigidity and resilience of the central portion are regulated and the resilience around the periphery is not reduced. Has been done.

Japanese Patent No. 3315618

  As described in Patent Document 1 described above, it is known to adjust the rigidity and resilience of the face part by forming a rib with a suitably thick wall on the back surface of the face part. By simply forming ribs, the rebound of the central area of the face portion is efficiently regulated and set to a CT value that approximates the central area of the face portion over a wide range (the CT value is effectively reduced). It is difficult to adjust the head structure to obtain the same flight distance as when the ball is hit at the center position.

  That is, with the X-shaped rib, it is difficult to set the CT value approximate to the center of the face portion over a wide range in the toe / heel direction of the face portion. In particular, it is difficult to adjust the resilience in the crown / sole direction, and it is difficult to improve the resilience over a wide range in the toe / heel direction on the sole side.

  The present invention has been made paying attention to the above-mentioned problems, and in the vicinity of the center position of the ball striking surface, a golf club capable of improving the balance of resilience between the crown side and the sole side and improving and stabilizing the flight distance. The purpose is to provide.

  In the present invention, when swinging and swinging, the length of the toe-heel direction on the crown side of the ball striking surface is the same as the length of the toe-heel direction on the sole side in order to prevent the sole portion from contacting the ground. In the face portion formed longer than the length, the balance of the resilience on the crown side and the sole side can be improved. In improving the balance of resilience between the crown side and the sole side, pay attention to the rigidity of the face portion at the actual hitting ball position in addition to the overall deflection characteristics (CT value distribution) of the club head face portion. It is characterized by that.

  That is, in order to achieve the above-described object, the present invention forms an outer shell body with a face portion, a crown portion, a sole portion, a side portion constituted by a toe side and a heel side, and a back portion. A golf club having a hollow metal club head, in which the length of the hitting surface on the crown side of the face portion on the crown side is longer than the length on the sole side in the toe / heel direction In the club, the face portion has a thick portion at a central portion, and has an extension portion extending from the thick portion toward the crown side and the sole side, and the center of the face portion When the face portion is divided into the crown side and the sole side with respect to a horizontal line passing through the position, the area obtained by adding the thick portion and the extension portion is arranged wider on the crown side than the sole side, and the center position Within the range of ± 20 mm in the toe-heel direction and ± 15 mm in the crown / sole direction, the average CT value at the equidistant position within the range of 10 mm from the horizontal line to the crown side and the sole side is greater than the sole side. The crown side is set so that

  In the above-described configuration, the CT value in the face portion is in a state where the periphery is connected to the crown portion, the side portion, and the sole portion. Although the upper limit value is regulated), as described above, the thick portion is formed at the center portion of the face portion, and the extended portion is formed from the thick portion toward the crown side and the sole side, It is possible to efficiently suppress the CT value in the central region.

  In addition, in the structure of the face portion in which the length of the hitting surface on the crown side in the toe / heel direction is longer than the length in the toe / heel direction on the sole side, the face portion is necessarily on the crown side. Since the structure is easy to bend, when a ball is hit in this region, local deformation at the hitting point becomes large, resulting in a weak ball with a high launch angle. In other words, as the local deformation at the hitting point increases, the loft angle when moving away from the ball becomes larger than the set loft angle, which is higher than the launch height imaged by the player, and the flight distance is increased. It will decline. For this reason, in the shape of the face part having the thick part and the extension part described above, by increasing the rigidity on the crown side, local deflection at the hitting point is suppressed, the launch angle is high, and weak ball muscles are formed. It becomes possible to suppress becoming.

  That is, in a structure in which a thick part is formed at the center part of the face part and an extension part is formed from the thick part toward the crown side and the sole side, the face part is based on a horizontal line passing through the center position of the face part. When the area is divided into the crown side and the sole side, the rigidity of the crown side can be relatively increased by arranging the area obtained by adding the thick part and the extension part wider on the crown side than on the sole side. . As a result, local deformation at the hitting point when the ball is hit on the crown side is suppressed, and the launch height can be approached to the player's image without becoming higher than necessary, and the flight distance is improved, and Stabilization is possible.

  Furthermore, within a range of ± 20 mm in the toe / heel direction from the center position and ± 15 mm in the crown / sole direction (this is a range in which a complete miss shot is not made and a normal hit ball is formed), The crown side is set so that the average CT value at the equidistant position within the range of 10 mm from the horizontal line to the crown side and the sole side is equal to or greater than the sole side.

  Usually, a roll is formed on the face portion in a cross-sectional side view, and the upper side (crown side) tends to collide obliquely with the ball, and the lower side (sole side) tends to collide frontward with the ball. For this reason, considering the collision efficiency with the ball, the resilience on the sole side will be improved, so the average CT value at an equidistant position within a range of 10 mm from the horizon to the crown side and the sole side, respectively. By setting the crown side so that it is greater than or equal to the sole side, it becomes possible to obtain substantially uniform resilience in the crown / sole direction, and even if the hit points vary, the flight distance is improved and stabilized It will be able to plan.

  According to the present invention, it is possible to obtain a golf club that improves the balance of the resilience between the crown side and the sole side in the vicinity of the center position of the ball striking surface and can improve and stabilize the flight distance.

1 is a front view showing a golf club according to a first embodiment of the present invention. The top view of a head part. The front view of a head part. Sectional drawing (longitudinal sectional drawing) along the AA line of FIG. Rear view of face part (view of face part from inside of head). It is a figure which shows another embodiment of this invention, and is a figure which shows a face part.

Hereinafter, embodiments of a golf club according to the present invention will be described.
FIG. 1 to FIG. 5 are views showing a first embodiment of a golf club according to the present invention. FIG. 1 is a front view of the golf club, FIG. 2 is a top view of a head portion, and FIG. FIG. 4 is a cross-sectional view (vertical cross-sectional view) along the line AA in FIG. 2, and FIG. 5 is a back view of the face portion (view of the face portion from the inside of the head). is there.

  The golf club 1 according to the present embodiment is configured by fixing a head 7 set to a specified lie angle and loft angle with respect to a reference horizontal plane P at the tip of a shaft 5 made of metal or FRP. ing. In this case, the head main body 7A constituting the head 7 includes a face portion 7a having a hitting surface 7B, a crown portion 7b extending rearward from the upper edge of the face portion 7a, and a rearward extending from the lower edge of the face portion 7a. There is provided a protruding sole portion 7c, a side portion 7d connecting the edges of the crown portion 7b and the sole portion 7c, and a back portion 7e positioned on the rear side of the side portion 7d. The side portion 7d includes a toe portion 7f and a heel portion 7g that pass through the back portion 7e.

  The head body 7A is integrated by casting, for example, a titanium alloy (Ti-6Al-4V, Ti-15V-3Cr-3Sn-3Al), an aluminum alloy, or a magnesium alloy except for the face portion 7a. The face member 8 constituting the hitting surface of the face portion 7a, which will be described in detail below, is fixed to the front side of the face member 7 (in this embodiment, a predetermined portion is attached to the face portion 7a). An opening 7C is formed, and the face member 8 is fitted into the opening, the periphery is welded, etc., and then polished to form a hollow metal head body 7A).

In this case, for the head main body 7A, each member (face part, crown part, sole part, side part; outer shell body) constituting the head main body 7A is individually formed and fixed by welding, bonding or the like. Alternatively, a plurality of members or partial components of each member may be integrally formed by casting or the like, and they may be fixed by welding, adhesion, or the like.
Further, a hosel part (not shown) for fastening the tip of the shaft 5 is integrally formed in the head main body 7A. The shaft 5 is fixed to the hosel part by fitting a tip part through a shaft insertion hole 9 formed in the crown part 7b.

  The face portion 7a is a portion where a hit ball is actually formed, and as described above, an opening 7C is formed in the face portion, and a face member 8 is separately attached to this portion. The face member 8 is made of, for example, titanium, titanium alloy (Ti-15V-3Cr-3Sn-3Al, Ti-6Al-4V, SP700, Ti-15V-6Cr-4Al, Ti-15Mo-5Zr-3Al, Ti-30Nb -10Ta-5Zr) is integrally formed into a plate shape by pressing or forging, and is fixed by, for example, welding, brazing, adhesion, laser welding, or CNC processing.

  Further, the face portion 7a has a face surface (ball striking surface to be hit) 7B as viewed from the front. The face surface 7B is a region surrounded by a top edge 7P that defines the upper and lower sides, a sole edge 7Q, and a side edge 7R. That is, with respect to the face surface 7B, when the head main body 7A is viewed from the front, the ridge line (the top edge 7P, the sole edge 7Q, And the side edge 7R) (when the ridge is curved, it is defined by the curved top). In this case, a score line 7S may be separately formed on the face surface 7B, or the colors may be classified by colors or the like so that the face surface 7B becomes clear.

  The face portion 7a is formed with, for example, a roll that curves along a crown / sole direction (hereinafter also referred to as an up / down direction) and a toe / heel direction (hereinafter referred to as a left / right direction). ), And a central position C of the face portion 7a specified in accordance with the above-described pendulum test procedure exists in the top region of both curved portions.

  In the present embodiment, when the golf ball 1 is held at a specified lie angle with respect to the reference horizontal plane P, when the hitting surface (face surface) 7B of the face portion is viewed from the front, the length of the crown side in the toe-heel direction is It has a face shape that is longer than the length in the toe / heel direction on the sole side, and both sides become narrower toward the sole side (the width becomes narrower from the crown side both sides toward the sole side center) (Substantially triangular).

  The face portion 7a configured as described above is configured such that the CT value changes according to the position where the hit ball is formed. Specifically, while efficiently regulating the CT value of the center region of the face part, with reference to the horizontal line passing through the center position C of the face part, the balance between the resilience of the crown side and the sole side is improved. The thickness of the face member 8 is changed.

Hereinafter, a configuration example of the face portion 7a (face member 8) and a distribution of CT values in the present embodiment will be specifically described.
First, the relationship between the CT value and the structure of the face portion will be described.
The CT value is a value obtained by installing the head itself in the measuring device, and is a contact time with the face portion when a so-called ball is hit. For this reason, the higher the CT value, the more easily the face portion bends, and the flight distance of the ball can be improved. Usually, the deflection characteristics of the face portion depend on the material, but greatly depend on the thickness and the distance from the edge region of the face portion. That is, by reducing the wall thickness, the face portion itself is easily bent, and the region farthest from the edge region (the central position C of the face portion) is easily bent greatly. Tend to be higher. In addition, for example, by changing the thickness partially, such as by forming a thin-walled portion, the bending rigidity around the periphery is lowered and it becomes easy to bend, so the CT value can be improved.

  On the other hand, the CT value is suppressed because the bending amount is small in areas with high rigidity, such as the edge area of the face part (the connection part between the crown part, side part, and sole part, which is the support area around the face part). Is possible. In addition to this, for example, by appropriately arranging a rib on the back surface of the face portion and appropriately forming a thick region, the bending rigidity around the periphery increases and it becomes difficult to bend, so the CT value is efficiently reduced. It is possible.

  As is clear from the above description, the CT value at the center position is the area farthest from the edge area and can be easily improved, but the upper limit is determined by the rule, so the hitting position In order to obtain the same flight distance (stable flight distance) as when the ball is hit at the center position when the variation occurs, the CT values at the center position are efficiently regulated while the CT values around the center position are controlled. It is important that the value is approximated by the CT value at the center position or adjusted so as to be a value larger than that.

  Specifically, it is possible to suppress the bending in the central region to some extent by arranging the thick portion in the central region while making the entire face portion flexible. That is, if the structure does not form a thick part at all in the face part, the CT value of the central area can be increased, but in the area approaching the edge, the rigidity increases rapidly and the CT value can be extremely reduced. However, it is possible to adjust the CT value other than the central region to a state close to it or to a high state by making the central region thicker and making it somewhat difficult to bend. Become.

  Therefore, in the head structure of the present invention, for example, as shown in FIG. 5, a thick portion 20 is formed in the center portion of the face portion 7a (face member 8), and the thick portion 20 is connected to the crown side and the sole. By forming the extension portions 21 and 22 having the same thickness as the thick portion 20 toward the side, the CT value of the central region is efficiently suppressed.

  The thick portion 20 at the center portion only needs to include the center position C of the face portion, and the extension portions 21 and 22 in this embodiment have the above-described face shape (toe heel on the crown side of the hitting surface). The length in the direction is longer than the length in the toe / heel direction on the sole side), and on the crown side, two of the thick part 20 extend on both sides in the toe / heel direction 1 (extension portions 21 and 21), and one on the sole side is extended to the central portion of the thick portion 20 (extension portion 22). For this reason, the thick part 20 and the extension parts 21 and 22 are formed in a substantially Y shape as a whole.

  Specifically, regarding the thickness of the thick portion 20 and the extension portions 21 and 22, the thinnest portion of the face member 8 (to be described later) so that the CT value in the central region can be effectively suppressed. The thickness of the thin-walled portions 28, 29) may be set to 1.5 to 3.5 times, preferably 1.5 to 2.5 times, 3.0 to 6.0 mm, preferably What is necessary is just to set to the range of 3.0-5.0 mm.

  In the face shape as described above, by forming the thick portion 20 in the central portion including the central position C, it becomes possible to effectively regulate the bending in the central region, and such a thick portion. 20 by forming substantially Y-shaped extensions 21 and 22 on the crown side and the sole side, so that the CT value of the central portion is more effectively regulated, and a high repulsion region is formed in the toe-heel direction. It becomes possible to enlarge.

  Note that the CT value in the central region can be effectively suppressed with respect to the size, height and thickness of the thick part 20 and the extension parts 21 and 22, and the formation positions and number of the extension parts 21 and 22. If it is, it will not be specifically limited, However, It is essential to satisfy the following requirements. Moreover, about the thick part 20 and the extension parts 21 and 22, it is not necessary to set to the exact same thickness. In this embodiment, it is possible to easily increase the rigidity on the crown side, as will be described later, by forming an extension portion having a larger number on the crown side than on the sole side.

  In the face shape described above, the face portion inevitably has a structure in which the crown side is easily bent. Therefore, when a ball is hit in this region, local deformation at the hitting point increases, and the loft angle when the ball is separated from the ball is increased. Will become bigger. The increase in the loft angle when moving away from the ball means that the launch angle becomes higher than expected by the player, and as a result, the weak ball line, that is, the initial velocity of the ball becomes slower, resulting in a flight distance. Will lead to a decline.

  Therefore, in the shape of the face part 7a (face member 8) having the thick part 20 and the extension parts 21 and 22 as shown in FIG. 5, the rigidity on the crown side is increased, whereby the local part at the hitting point is obtained. To prevent the launch angle from increasing.

  Specifically, when the face portion 7a is divided into the crown side and the sole side with reference to a horizontal line P1 passing through the center position C of the face portion 7a (the horizontal line P1 is parallel to the reference horizontal plane P), The area obtained by adding the thick portion 20 and the extension portions 21 and 22 is arranged wider on the crown side than on the sole side. That is, the thick wall portion 20 and the extension portion 21 on the crown side have an added area A1 larger than the sum area A2 of the thick wall portion 20 and the extension portion 22 on the sole side (A1> A2). 20 and extensions 21 and 22 are formed (thick regions are deviated upward).

  Thereby, since the rigidity of the face portion 7a is relatively increased on the crown side, local deformation at the hitting portion on the crown side at the time of hitting the ball is prevented, and the loft angle of the face surface when the ball is separated from being excessively tilted. It is possible to prevent a decrease in flight distance.

The CT value distribution in the face portion 7a is set as follows.
That is, the average CT at equidistant positions within a range of ± 20 mm in the toe / heel direction and ± 15 mm in the crown / sole direction from the central position C and within a range of 10 mm from the horizontal line P1 to the crown side and the sole side, respectively. The crown side is set so that the value is greater than or equal to the sole side.

  Here, the range of ± 20 mm in the toe / heel direction and ± 15 mm in the crown / sole direction from the center position C is the range where the above-mentioned range does not cause a so-called miss shot when hitting a normal golf club. Based on something. The equidistant position from the horizontal line P1 is, for example, a position 5 mm from the horizontal line P1 to the crown side, a position 5 mm from the sole side, a position 10 mm from the horizontal line P1 to the crown side, and a position 10 mm from the sole side. Applicable and compare both at equidistant positions. Therefore, for example, at a position 5 mm from the horizontal line P1 to the crown side, CT values at predetermined intervals (in this embodiment, 5 mm intervals) are measured in the toe-heel direction, and an average value is obtained. Similarly, from the horizontal line P1 At a position of 5 mm on the sole side, CT values at a predetermined interval (in this embodiment, 5 mm interval) are measured in the toe-heel direction, and an average value is obtained.

  The face portion 7a is configured such that the average value of CT values at a position 5 mm from the horizontal line P1 to the crown side is equal to or greater than the average value of CT values at a position 5 mm from the horizontal line P1 to the sole side. In this case, the average value of CT values at a position 10 mm from the horizontal line P1 to the crown side is also configured to be equal to or greater than the average value of CT values at a position 10 mm from the horizontal line P1 to the sole side.

  In addition, when obtaining the equidistant position and the average value from the horizontal line P1, it may be a shorter distance, but since it is a relative relationship between the crown side and the sole side, if it is 5 mm as described above, It is enough for comparison.

The CT value distribution as described above is set for the following reason.
Usually, a roll is formed on the face portion 7a in a cross-sectional side view, and the upper side (crown side) tends to collide obliquely with the ball, and the lower side (sole side) tends to collide frontward with the ball. . For this reason, in consideration of the collision efficiency with the ball, the resilience on the sole side is improved, so the average CT at equidistant positions within a range of 10 mm from the horizontal line P1 to the crown side and the sole side, respectively. By setting the crown side so that the value is greater than or equal to the sole side, almost uniform resilience can be obtained in the crown / sole direction, and even if the hit points vary, the flight distance is improved and stabilized Can be planned.

Actually, if the golf club includes the thick portion 20 as shown in FIG. 5 and the face portion 7a in which the extended portions 21 and 22 are formed, the CT value distribution as shown in the following table can be obtained. Is possible.
Here, specific numerical values are not specified, but an example in which the CT value distribution is set to a preferable state by adjusting the configuration of the thick portion 20 and the configurations of the extension portions 21 and 22 described above. It is. In the table, the CT value measured at the center position C is used as a reference (a value that falls within the rule range, and this value is assumed to be 100%), the crown (U) / sole (D) direction, and the toe (T ) The distribution of CT values is shown in 5 mm increments in the heel (H) direction.

As seen in this CT value distribution, the average value of CT values at the position (U5) 5 mm from the horizontal line P1 to the crown side is 100.2, and the CT value at the position (D5) 5 mm from the horizontal line P1 to the sole side. The average value is 98.2, and the CT value on the crown side is set to be high at the position ± 5 mm from the horizontal line P1. Similarly, the average value of CT values at the position (U10) 10 mm from the horizontal line P1 to the crown side is 95.9, and the average value of CT values at the position (D10) 10 mm from the horizontal line P1 to the sole side is 91 The average CT value on the crown side is set high even at a position ± 10 mm from the horizontal line P1.

  According to the golf club having the structure of the face portion 7a as described above, the following effects can be obtained.

  As described above, the thick-walled portion 20 and the extended portions 21 and 22 are distributed over the crown side with respect to the horizontal line P1, so that the rebound on the crown side is efficiently increased. On the other hand, the regulation of the resilience on the sole side can be reduced, and the resilience can be approximated over a wide range in the crown / sole direction. In this case, on the crown side, since there are many thick regions, the rigidity is increased with respect to the sole side, and as described above, local deformation of the face at the time of hitting is suppressed, and the flight distance is improved, and Stabilization can be achieved. Moreover, the balance of the launch height can be improved between the center position of the face part and the position on the sole side, and the rebound (CT value) on the crown side and the sole side is also improved in a balanced manner. It becomes possible to do.

  In addition, as compared with the crown side, it is possible to largely distribute a thin range in the toe / heel direction on the sole side, so that the resilience of the position where the resilience is relatively likely to be reduced is improved. It becomes possible.

  In addition, by setting the crown side so that the average CT value at the equidistant position within the range of 10 mm from the horizontal line P1 to the crown side and the sole side is equal to or greater than the sole side, A substantially uniform resilience can be obtained, and the flying distance can be improved and stabilized even if the hit points vary.

  Therefore, the resilience can be further optimized over a wide range of the hitting surface of the face portion 7a, and the flight distance can be reliably improved and stabilized.

  In the above configuration, regarding the CT value at the equidistant position within the range of 10 mm from the horizontal line P1 to the crown side and the sole side, the sole side becomes higher depending on the measurement position (for example, the measurement points shown in Table 1). There may be a part. That is, since the CT value depends on the shape of the thick portion and the shape of the extension portion, there may be a position (region) where the sole side is partially increased depending on the shape. However, of the number of measurement points to be compared, it is only necessary to set the number of 1/2 or more so that the crown side is higher than the sole side. Preferably, 70% or more, or 80% or more, of the measurement location (comparison number) is higher on the crown side. Actually, it is considered that it is preferable that the 100% crown side is high, but considering the limitation of the allowable range that can be set, and the effects and productivity, if the above range, the necessary operational effects are obtained. It is possible to play.

  In the above configuration, as shown by the CT value distribution in Table 1, the CT value at the center position of the face portion 7a is used as a reference, the position 20 mm from the center position C in the horizontal toe side, and the position 20 mm from the horizontal heel side. In addition, the CT value within the range surrounded by the four positions of 15 mm from the central position C on the vertical crown side and 10 mm on the vertical sole side should be 80% or more of the CT value at the central position. preferable.

  In such a configuration, since the CT value on the crown side is relatively larger than that on the sole side, the resilience at the time of hitting can be improved over a wide range, and even if the hit points vary, it is even more The flight distance can be improved and stabilized.

  Further, in the above configuration, when the face portion 7a is divided vertically on the crown side and the sole side with respect to the horizontal line P1 passing through the center position C of the face portion 7a, the total area on the crown side / the whole on the sole side It is preferable to set the value so that (area of the thick portion and extension portion on the crown side / area of the thick portion and extension portion on the sole side) is larger than (area).

  With such a setting, the high rigidity region on the crown side has a relatively higher structure with respect to the horizontal line P1, so that the above-described effects can be obtained more reliably. .

  Further, in the structure of the face portion 7 a (face member 8) shown in FIG. 5, a region having a thinner thickness is formed around the thick portion 20 and the extended portions 21 and 22. In the above-described embodiment, since the thick portion 20 and the extended portions 21 and 22 are formed in a substantially Y shape, the thin region is the crown side region 25 and the toe side region. 26 and a heel side region 27.

  By forming such thin and thick portions (thin relative to the thick portion 20 to be thin) 25, 26 and 27 around, the regions of the thick portion 20 and the extended portions 21 and 22 are formed. It can be easily bent and can be set to a high value without lowering the CT value of the entire face portion.

  In the present embodiment, the face portion 7a is formed by a face member 8 that is formed with an opening 7C and is separately attached to this portion. The extension portions 21 and 22 are shown in FIG. Thus, it is terminated before reaching the edge of the face member 8.

  With this configuration, it is possible to suppress a decrease in CT value in the edge region and to easily set the CT value in the central region to a high value.

  Further, the flange portion 7F defining the opening 7C may have the same thickness as the edge region of the face member 8, but by further reducing the thickness, the flange portion 7F in the central region of the face portion 7a may be used. CT value can be improved. In this case, a thickened region may be formed in the flange portion 7F as necessary.

  In the configuration of the present embodiment, the second thin-walled portions 28 and 29 that are thinner than the thin-walled portions (referred to as first thin-walled portions) 25, 26, and 27 are formed. is doing. Such thin and thick portions 28 and 29 are widely formed on the toe side and the heel side, which makes it easy to approximate the CT value to the CT value at the center position over a wide range in the toe and heel direction, Even when the hit point at the time of hitting the ball deviates from the center position of the face in the toe-heel direction, the flight distance can be improved and stabilized.

  In addition, about the 1st thin thickness part 25,26,27, by approaching the thickness of the thick part 20 and the extension parts 21 and 22 (specifically, the thick part 20 and the extension parts 21 and 22 of 22). By setting the thickness to 70 to 90% of the wall thickness, the function of increasing the rigidity on the crown side is increased, and local deformation at the time of hitting can be effectively suppressed. Alternatively, the first thin-walled portions 25, 26, 27 are made closer to the thickness of the second thin-walled portions 28, 29 (specifically, the thickness of the second thin-walled portions 28, 29 is 110 to 150%), the resilience can be further improved over a wide range in the toe-heel direction. Of course, these thin portions are not limited to such thicknesses.

  Further, in the above-described configuration, it is preferable to form the inclined portion 30 that gradually inclines toward the thin-walled side, instead of forming a step (perpendicular) at a portion having a different thickness.

  By forming such an inclined portion 30, it becomes possible to effectively prevent cracks and the like due to stress concentration, and further prevent sudden changes in CT value and sudden changes in vibration (vibration). Is possible.

  In the above-described configuration, the first thin wall portions 25, 26, 27 and the second thin wall portions 28, 29 may have a substantially uniform wall thickness within the area, but shift to the peripheral side. As it goes on, it is preferable to gradually reduce the thickness. With this configuration, it becomes possible to more easily approximate the resilience to the center position.

Next, another embodiment of the present invention will be described with reference to FIG.
FIG. 6 is a diagram showing the configuration of the face portion. In the above-described embodiment, the face portion 7a is formed with a flange on the front side of the crown portion 7b, the sole portion 7c, and the side portion 7d, and the face member 8 is fitted into an opening defined by the end face of the flange to be stopped. As shown in FIG. 6, the face member 8 is not formed in a plate shape, but is formed so as to have a cup shape by bending the periphery, and the bent portion is formed as shown in FIG. 6. Alternatively, the crown portion 7b, the sole portion 7c, and the side portion 7d may be fixed to the opening end faces. Alternatively, the face portion 7a may be integrally formed with the head main body 7A instead of fixing the face member 8 as a separate member.

  In this embodiment, the thick part 20 and the extension parts 21 and 22 are formed in a substantially Y shape, and each extension part 21 and 22 is extended to the edge of the face part 7a. Further, regions 25A, 26A, and 27A that are thinner than the thick portion 20 and the extended portions 21 and 22 are formed.

  In such a configuration, an opening is provided on the face surface side and it is fixed by welding or the like. Since there is no weld bead on the face surface, it is easy to set the CT value in the edge region of the face to a high value. Since the thin and thick portions 26A and 27A are relatively wide in the toe-heel direction, the CT value can be easily approximated to the CT value at the center position over a wide range in the toe-heel direction. Even when the hit point deviates from the center position of the face in the toe-heel direction, the flight distance can be further improved and stabilized.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the face structure as in the above-described embodiment, and various modifications can be made.

  That is, the face portion in the present invention is formed such that the length of the hitting surface on the crown side in the toe-heel direction is longer than the length on the sole side in the toe-heel direction, and at the center of the face portion. Forming a thick portion and forming an extended portion extending from the thick portion toward the crown side and the sole side; with respect to a horizontal line passing through the center position of the face portion, the face portion is defined as the crown side and the sole When divided into the sides, the area obtained by adding the thick part and the extension part is wider on the crown side than the sole side, and ± 20 mm in the toe-heel direction from the center position, the crown sole Within the range of ± 15 mm in the direction, the average CT value at the equidistant position within the range of 10 mm from the horizontal line to the crown side and the sole side is set so that it is greater than or equal to the sole side As long as the round side is set, the specific structure of the face portion can be appropriately modified.

  For this reason, the thickness change (configuration of the extension portion) depending on the constituent material and position (region) of the face portion 7a is not limited to a specific structure, and in addition to the above configuration, the back surface of the face portion 7a. Additional structures such as ribs, grooves, recesses, and protrusions may be integrally formed, or may be added by bonding or welding. In this case, for additional structures, for example, by changing the height, thickness, formation position, and shape of the ribs and protrusions, or by changing the depth and width of the grooves and recesses, the formation position, It is possible to change the CT value.

  The thick portion 20 is preferably formed so that the center position thereof approximates the center position C of the face portion 7a, but the center position C is substantially the center of the thick portion 20. It may exist in the vicinity of the position (within a radius of 10 mm). For example, the thick portion 20 may be displaced to the crown side or to the toe side.

  Also, the point where the perpendicular to the face portion 7a is lowered from the center of gravity position of the head, the so-called sweet spot depends on the design of the center of gravity of the head, and may not coincide with the center position C of the face portion. Since it is the part where the feeling that the ball is most captured at the time of hitting can be obtained and the head speed can be transmitted most efficiently to the ball, It is desirable to set it in the vicinity position (at least within a radius of 10 mm from the center position).

DESCRIPTION OF SYMBOLS 1 Golf club 5 Shaft 7 Head 7A Head main body 7B Face surface 7a Face part 7b Crown part 8 Face member 20 Thick part 21 and 22 Extension part C Center position

Claims (4)

  1. A metal club head having a hollow structure in which an outer shell is formed by a face portion, a crown portion, a sole portion, a side portion constituted by a toe side and a heel side, and a back portion; A golf club in which the length in the toe-heel direction on the crown side of the hitting surface is longer than the length in the toe-heel direction on the sole side,
    The face part has a thick part at the center part, and has an extension part extending from the thick part toward the crown side and the sole side,
    When the face part is divided into the crown side and the sole side with reference to the horizontal line passing through the center position of the face part, the area obtained by adding the thick part and the extension part is arranged wider on the crown side than the sole side. And
    An average CT value at an equidistant position within a range of ± 20 mm in the toe / heel direction and ± 15 mm in the crown / sole direction from the central position and within a range of 10 mm from the horizontal line to the crown side and the sole side, A golf club characterized in that the crown side is set to be at least the sole side.
  2.   Using the CT value at the center position of the face portion as a reference, a position 20 mm from the center position on the horizontal toe side, a position 20 mm from the horizontal heel side, a position 15 mm from the center position on the vertical crown side, and a vertical sole 2. The golf club according to claim 1, wherein a CT value within a range surrounded by four positions of 10 mm on the side is 80% or more of a CT value at a central position.
  3.   Based on the horizontal line passing through the center position of the face portion, when the face portion is divided into the top and bottom on the crown side and the sole side, (the crown-side thick area on the crown side / the total area on the sole side) 3. The golf club according to claim 1, wherein an area of the extension portion / a thickness of the thick portion on the sole side and an area of the extension portion) is set to a large value.
  4.   The face portion has a first thin-walled portion that is thinner than the thick-walled portion and the extension portion, and a first-thick-walled portion that is thinner than the first thin-walled portion. The golf club according to claim 1, wherein the golf club has two thin portions.
JP2009296906A 2009-12-28 2009-12-28 Golf club Active JP5427598B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013202143A (en) * 2012-03-28 2013-10-07 Globeride Inc Golf club head, and golf club

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002017912A (en) * 2000-07-11 2002-01-22 Mizuno Corp Golf club
JP3315618B2 (en) * 1997-03-18 2002-08-19 有限会社マークス クリエイティブ クラフト Golf club head
JP2004358224A (en) * 2003-05-01 2004-12-24 Acushnet Co Golf club head with variable flexural stiffness for controlled ball flight and trajectory
JP2006505329A (en) * 2002-11-04 2006-02-16 テイラー メイド ゴルフ カンパニー インコーポレイテッド Golf club face manufacturing method
JP3130865U (en) * 2006-08-04 2007-04-12 復盛股▲分▼有限公司 Golf club head
JP2008022987A (en) * 2006-07-19 2008-02-07 Daiwa Seiko Inc Golf club

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3315618B2 (en) * 1997-03-18 2002-08-19 有限会社マークス クリエイティブ クラフト Golf club head
JP2002017912A (en) * 2000-07-11 2002-01-22 Mizuno Corp Golf club
JP2006505329A (en) * 2002-11-04 2006-02-16 テイラー メイド ゴルフ カンパニー インコーポレイテッド Golf club face manufacturing method
JP2004358224A (en) * 2003-05-01 2004-12-24 Acushnet Co Golf club head with variable flexural stiffness for controlled ball flight and trajectory
JP2008022987A (en) * 2006-07-19 2008-02-07 Daiwa Seiko Inc Golf club
JP3130865U (en) * 2006-08-04 2007-04-12 復盛股▲分▼有限公司 Golf club head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013202143A (en) * 2012-03-28 2013-10-07 Globeride Inc Golf club head, and golf club

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