JP3208316U - Golf club head - Google Patents

Abstract

Provided is a golf club head having improved sweet spots gathered around a geometric center and using a bent portion of either a sole or a crown portion to improve the flexibility of a hitting face. A golf club head has a variable thickness profile comprising a thick central portion, a transition portion, and a thin peripheral portion, the transition portion surrounding the thick central portion and the thin peripheral portion including the transition portion. Surrounding, the thick central portion has a center, and the center of this thick central portion is located at an equal distance from the thickest central portion of the thickest heel portion and the thickest central portion of the thickest toe side The center of the central portion is offset from the geometric center of the striking face. [Selection] Figure 14

Description

  This technique relates generally to golf clubs, and more specifically to golf club heads with improved sweet spots collected around the geometric center of the golf club head. Furthermore, this technique also improves the flexibility of the hitting face of the golf club head by utilizing a bend in either the sole or crown portion of the golf club head.

  In the highly competitive industry of golf club design, distance and accuracy are two of the most important performance factors that help define the requirements for metal wood type golf clubs. Some people may argue that the appearance, sensation, and sound (look, feel, and sound) of a golf club affect their views about the golf club, but performance factors determine the desired conditions of the golf club. There is no objection to playing an important role in the above. The performance factor of maximizing distance while still maintaining accuracy is even more dominant in metalwood golf club heads. Unlike iron-type golf club heads, where the accuracy of the golf shot surpasses the distance advantage afforded by any specific golf club, metal-wood type golf club heads allow the golfer to move the golf ball as far as possible, And designed to be able to strike more straightly.

  To maximize the distance while maintaining the accuracy of a metalwood golf club head, with the goal of maximizing the distance of the golf ball hit by the golf club head near the geometric center of the golf club head Metal wood golf clubs have been designed. The geometric center of the golf club head will generally achieve golf shots that maximize energy by reducing energy loss between the golf ball and the golf club head, according to inherent physical laws. In order to quantify this value, the United States Golf Association (USGA) has worked with the golf industry in various ways, such as calculating coefficient of restitution (COR), or calculating characteristic time (CT), golf clubs. It has been prepared as a method for quantifying the rebound characteristics of golf balls after colliding with them.

  US Pat. No. 6,390,933 (Gallaway et al., '933 patent) is a golf club head that has a coefficient of restitution greater than 0.845 and withstands when hitting a golf ball 2000 times at 110 miles / hour. Thus, one method of increasing the COR of a golf club head is contemplated by disclosing a club head that may be composed of three parts, a face, a sole, and a crown. More specifically, the '933 patent may be composed of a titanium material, with a volume ranging from 175 cubic centimeters to 400 cubic centimeters, a weight ranging from 165 grams to 300 grams, and a striking plate surface area of 4.00 square. A golf club head is disclosed that may range from inches to 7.50 square inches.

  Focusing on accuracy instead of distance, U.S. Patent Publication No. 2004/0116202 (Lin, '202) discloses a plurality of holes around a golf club head so that the club head hits the golf ball. A golf club head by disclosing a golf club head in which most of the generated vibration and acoustic waves are dissipated from these holes, thereby improving the accuracy of the direction of the striking golf ball. We are investigating ways to improve the accuracy.

  However, more rigorously, the development of maximizing distance while maintaining the accuracy of a metalwood golf club head is predicated on the fact that a golfer can hit a golf ball at a sweet spot. . It will be difficult for the average golfer to hit the golf ball consistently at the sweet spot. Thus, in addition to the performance factors described above, the size and position of the sweet spot can be optimized so that the average golfer can enjoy the design benefits of maximizing the accuracy and distance of the golf club head. Would be desired.

US Pat. No. 6,390,933 US Patent Publication No. 2004/0116202

  The systems, methods, and apparatus described herein involve a number of innovative aspects, and any one of these aspects is not essential to achieve these desired attributes, and is solely associated with it. is not. Some of the useful features are summarized here. However, the scope of claims is not limited.

  One aspect of this technique is the recognition that some golf club head structures produce a sweet spot that is offset from the geometric center of the striking face. Accordingly, there is a need for an improved golf club head structure that can employ innovative features while concentrating the sweet spot around the geometric center of the striking face. The embodiments disclosed herein provide a golf club head structure that improves the performance of the golf club head.

  One non-limiting example of this technique is a golf club head; a striking face; a rear body having a crown portion and a sole portion, wherein the crown portion is coupled to the upper portion of the striking face. The sole portion coupled to the lower portion of the striking face; the striking face; a heel side and a toe side; a main shaft positioned on a surface of the striking face; The main axis being the longest line drawn from the heel side to the toe side and drawn on the striking face; the minor axis positioned on the surface of the striking face, the crown The short axis, which is substantially oriented from part to the sole part and drawn on the striking face, perpendicular to the main axis and being the longest line; variable thickness The variable thickness profile has a thick central portion; a transition portion; a thin peripheral portion; the transition portion surrounds the thick central portion; and the thin peripheral portion is the transition portion. The thick central portion has a center, and the center of the thick central portion extends along an axis parallel to the main axis along the most heel-side portion of the thick central portion and the thick central portion. Positioned equidistant from the toe portion; the center of the thick central portion includes the golf club head offset from the geometric center of the striking face along an axis parallel to the main axis.

  In an additional non-limiting example of this technique, the center of the thick central portion is offset from the geometric center in the direction of the toe side of the striking face by at least 2 mm.

  In an additional non-limiting example of this technique, the center of the thick central portion is offset from the geometric center in the direction of the toe side of the striking face by at least 3 mm and less than 7 mm.

  In an additional non-limiting example of this technique, the center of the thick central portion is offset from the geometric center in the direction of the toe side of the striking face by at least 4 mm and less than 6 mm.

  In an additional non-limiting example of this technique, the distance H from the center of the central portion to the most heeled portion of the transition portion is from the center of the central portion to the toe side of the transition portion. The distance H and the distance G are each measured along an axis parallel to the main axis.

  In an additional non-limiting example of this technique, the hitting face has a sweet spot, the sweet spot being at least 99 of the maximum achieved ball speed achieved when a golf ball hits the hitting face. Defined as the portion of the striking face that can form a velocity of 7%, the sweet spot is substantially centered about the geometric center of the striking face.

In additional non _-limiting examples of this technique, | (CT _{Toe-0.5 "} / CT _Center ) -1 | <= 0.06 and | (CT _Heel-0.5" / CT _Center ) -1 | <= 0.06, CT _Center is the CT measurement value of the geometric center of the striking face, and CT _{Toe-0.5 "} is the geometric dimension along an axis parallel to the principal axis. CT measured value at a point shifted by 0.5 inch from the center to the toe side, and CT _{Heel-0.5 "} is the direction from the geometric center to the heel side along an axis parallel to the main axis. CT measured value at a point shifted by 0.5 inch.

  In an additional non-limiting example of this technique, the thick central portion is substantially elliptical and has a substantially constant thickness, and the geometric center of the striking face is within the main axis. Positioned at a point.

  One non-limiting example of this technique is a golf club head; a striking face; a rear body having a crown portion and a sole portion, wherein the crown portion is coupled to the upper portion of the striking face. The sole portion coupled to the lower portion of the striking face; the striking face; a heel side and a toe side; a main shaft positioned on a surface of the striking face; The main axis being the longest line drawn from the heel side to the toe side and drawn on the striking face; the minor axis positioned on the surface of the striking face, the crown The short axis, which is substantially oriented from part to the sole part and drawn on the striking face, perpendicular to the main axis and being the longest line; variable thickness The variable thickness profile has a thick central portion; a transition portion; a thin peripheral portion; the transition portion surrounds the thick central portion; and the thin peripheral portion is the transition portion. The thick central portion has a center, and the center of the thick central portion extends along an axis parallel to the main axis along the most heel-side portion of the thick central portion and the thick central portion. The sole portion further includes a bent portion spaced from the striking face, the bent portion having a front wall, a top portion, and a rear wall, and the front wall And the back wall extends into the golf club head, the front wall and the back wall are connected at the top; the bent portion is a geometric center of the striking face along an axis parallel to the main axis Or Deviation; from the center the geometrical center of the striking face along an axis parallel with the spindle of the thick center portion, in substantially the same direction as the bent portion includes a deviation has the golf club head.

  In an additional non-limiting example of this technique, the bend has a center, the center of the bend being along the axis parallel to the main axis, the most heel portion of the bend. And the center of the bent portion is at least 2 mm away from the geometric center of the golf club head, and the center of the thick central portion of the striking face is It is offset from the geometric center of the golf club by at least 2 mm.

  In an additional non-limiting example of this technique, the center of the bend is offset from the geometric center by at least 3 mm and less than 7 mm, and the center of the thick central portion is at least 3 mm from the geometric center. And less than 7 mm.

  In an additional non-limiting example of this technique, the center of the bend and the center of the thick central portion are offset from the geometric center in substantially the same direction along an axis parallel to the main axis. ing.

  In an additional non-limiting example of this technique, both the bend and the thick central portion are offset toward the toe side of the striking face.

  In an additional non-limiting example of this technique, the hitting face has a sweet spot, the sweet spot being at least 99 of the maximum achieved ball speed achieved when a golf ball hits the hitting face. Defined as the portion of the striking face that can form a velocity of 7%, the sweet spot is substantially centered about the geometric center of the striking face.

In additional non _-limiting examples of this technique, | (CT _{Toe-0.5 "} / CT _Center ) -1 | <= 0.06 and | (CT _Heel-0.5" / CT _Center ) -1 | <= 0.06, CT _Center is the CT measurement value of the geometric center of the striking face, and CT _{Toe-0.5 "} is the geometric dimension along an axis parallel to the principal axis. CT measured value at a point shifted by 0.5 inch from the center to the toe side, and CT _{Heel-0.5 "} is the direction from the geometric center to the heel side along an axis parallel to the main axis. CT measured value at a point shifted by 0.5 inch.

  In an additional non-limiting example of this technique, the thick central portion is substantially elliptical and has a substantially constant thickness, and the geometric center of the striking face is within the main axis. Positioned at a point.

  One non-limiting example of this technique is a golf club head; a striking face; a rear body having a crown portion and a sole portion, wherein the crown portion is coupled to the upper portion of the striking face. The sole portion coupled to the lower portion of the striking face; the striking face; a heel side and a toe side; a main shaft positioned on a surface of the striking face; The main axis being the longest line drawn from the heel side to the toe side and drawn on the striking face; the minor axis positioned on the surface of the striking face, the crown The short axis, which is substantially oriented from part to the sole part and drawn on the striking face, perpendicular to the main axis and being the longest line; variable thickness The variable thickness profile has a thick central portion; a transition portion; a thin peripheral portion; the transition portion surrounds the thick central portion; and the thin peripheral portion is the transition portion. The thick central portion has a center, and the center of the thick central portion extends along an axis parallel to the main axis along the most heel-side portion of the thick central portion and the thick central portion. The sole portion further includes a bent portion spaced from the striking face, the bent portion having a front wall, a top portion, and a rear wall, and the front wall And both the back wall extend into the golf club head, the front wall and the back wall are connected at the top; the bent portion includes a toe portion in a toe direction from the geometric center of the hitting face; A heel portion in a heel direction from a geometric center; either the toe portion of the bent portion or the heel portion of the bent portion is more flexible than the opposite portion; the center of the thick central portion is the main axis The golf club head being offset along the axis parallel to the direction of the softer portion of the bend.

  In an additional non-limiting example of this technique, the center of the thick central portion is offset by at least 2 mm from the geometric center.

  In an additional non-limiting example of this technique, the center of the thick central portion is offset from the geometric center by at least 3 mm and less than 7 mm.

  In an additional non-limiting example of this technique, the center of the thick central portion is offset from the geometric center by at least 4 mm and less than 6 mm.

  In an additional non-limiting example of this technique, the hitting face has a sweet spot, the sweet spot being at least 99 of the maximum achieved ball speed achieved when a golf ball hits the hitting face. Defined as the portion of the striking face that can form a velocity of 7%, the sweet spot is substantially centered about the geometric center of the striking face.

In additional non _-limiting examples of this technique, | (CT _{Toe-0.5 "} / CT _Center ) -1 | <= 0.06 and | (CT _Heel-0.5" / CT _Center ) -1 | <= 0.06, CT _Center is the CT measurement value of the geometric center of the striking face, and CT _{Toe-0.5 "} is the geometric dimension along an axis parallel to the principal axis. CT measured value at a point shifted by 0.5 inch from the center to the toe side, and CT _{Heel-0.5 "} is the direction from the geometric center to the heel side along an axis parallel to the main axis. CT measured value at a point shifted by 0.5 inch.

  In an additional non-limiting example of this technique, the thick central portion is substantially elliptical and has a substantially constant thickness, and the geometric center of the striking face is within the main axis. Located at a point, the thick central portion is offset from the geometric center in the direction of the toe side of the striking face.

  In an additional non-limiting embodiment of the invention, the front wall of the bend has a wall thickness greater than or equal to the thickness of the back wall of the bend, and the apex of the bend is greater than the back wall thickness. Or equal wall thickness.

  In an additional non-limiting embodiment of the invention, the sole portion further has a bend spaced from the striking face. The bend further includes a central portion located near the geometric center of the striking face, and two or more intermediate transition regions located near the toe and heel portions of the central portion, Or two or more outer transition regions positioned near the toe and heel portions of the plurality of intermediate transition regions. The central portion further includes a front wall, a back wall, and a top, the front wall having a wall thickness that is greater than the wall thickness of the back wall, the back wall comprising a plurality of intermediate transition regions of two or more. And the two or more intermediate transition regions have a wall thickness that is greater than the wall thickness of the two or more outer transition regions.

  The accompanying drawings constitute a part of the specification and should be understood in conjunction therewith. However, the illustrated embodiments are merely examples and are not intended to be limiting. Like reference symbols in the various drawings indicate like elements.

1 is a perspective view of a golf club head according to one embodiment of the present invention. 1 shows a front view of a golf club head. 2 shows a graphic display between a golf club and a golf ball. FIG. 3 shows a front view of a golf club head with a sweet spot positioned near the geometric center of the striking face. 1 shows a side view of one embodiment of a golf club head including a bend. 1 shows a front view of a golf club head including a bend and a sweet spot away from the geometric center of the striking face. FIG. FIG. 2 shows a side view of one embodiment of a golf club head including a striking face with a variable thickness profile and a bend. FIG. 8 shows a front view of the internal geometry of the golf club head of FIG. 7. FIG. 8 is a front view of the internal geometry of the golf club of FIG. 7 including a plurality of relationships for the location of each part of the variable face thickness profile and the location of the bend relative to the geometric center of the striking face. FIG. 10 of the accompanying drawings shows a cross-sectional view of a golf club head according to an alternative embodiment of the present invention. FIG. 11 of the accompanying drawings shows an enlarged cross-sectional view of the sole portion of region A of the golf club head shown in FIG. FIG. 12 of the accompanying drawings shows a cross-sectional view of a golf club head according to another alternative embodiment of the present invention. FIG. 13 of the accompanying drawings shows an enlarged cross-sectional view of the sole portion of the region B of the golf club head shown in FIG. FIG. 14 of the accompanying drawings shows a cross-sectional view along different planes showing the features of the sole of the golf club head according to another alternative embodiment of the present invention.

  In the following detailed description, reference is made to the accompanying drawings, which form a part hereof. The illustrative embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be adopted and other changes may be made without departing from the spirit or scope of the subject matter presented here. The aspects of this disclosure may be employed, substituted, combined, and designed in a wide variety of different configurations, as generally described herein and illustrated in the figures, which are clearly It is understood to form part of this disclosure. For example, a system or apparatus or method may be implemented or implemented using any number of aspects disclosed herein. Further, such a system or apparatus and such a method may be implemented using other configurations and functions, and in addition to one or more aspects disclosed herein, other configurations, It may be implemented using a function. Variations and other modifications of the features of the invention described herein, as well as further applications of the principles of the invention described herein, will occur to those of ordinary skill in the art based on this disclosure. It is considered to be within the range.

  Outside of the examples, or unless otherwise stated, all numerical ranges, amounts, values and percentages such as those relating to material amounts, moments of inertia, center of gravity positions, loft and draft angles, etc. in the specification Can be recognized as having such a term “about”, even if the term “about” is not clearly indicated with a value, amount, or range. Accordingly, unless indicated otherwise, the numerical parameters in the specification and claims are approximations, which vary depending upon the desired properties desired to be realized by the present invention. Although not intended to exclude the application of the equivalence theory of the claims, at least the parameters of each quantity should be understood under the reported number of execution digits and understood by the usual rounding method.

  Although the quantity ranges and parameters representing the broad range of this invention are approximate, the quantity values shown in the examples of the specification are reported as accurately as possible. However, any quantity value has inherent errors due to the standard deviations found in the measurements of each experiment. Further, where ranges of quantities are indicated for various things, it should be understood that combinations of the above indicated value ranges can be used.

  In describing this technique, the following terms may be used. The singular forms ("a", "an", and "the") include plural forms unless the context clearly dictates otherwise. Therefore, for example, the description regarding one item includes the description regarding one or more items. The term “plurality” includes two or more items. The term “substantially” does not require that the feature, parameter, or value indicated be exactly the same, and deviations or variations do not exclude the effect that the feature was intended to achieve. These deviations or variations include, for example, tolerances, measurement errors, measurement accuracy constraints, and other factors known to those skilled in the art. Multiple items may be presented in a common list for convenience. However, in these lists, it should be recognized that each of the list components is individually identified as another unique element. Thus, the individual elements of such lists should be construed as the de facto equivalent of any other element of the same list, unless a contradictory indication is made. It derives only from the fact that they are displayed. Further, where the terms “and” (“and”), and “or” (“or”) are used in connection with a list of elements, they should be interpreted broadly and any of the listed elements Means that one or more of the following may be used alone or in combination with other listed elements. The term “alternatively” means selecting one of two or more alternatives, and the selection of those listed elements at a time among those listed rare alternatives It is not intended to be limited to only one.

  The features of this disclosure will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. After considering the discussion here, especially after reading the Detailed Description section, you should understand how these illustrated features can help explain these given principles of this disclosure. Let's go.

  The embodiments described herein generally relate to golf clubs having improved sweet spots. More specifically, some embodiments relate to golf club heads that aggregate sweet spots around the geometric center of the golf club head.

  FIG. 1 shows an overhead view of a golf club head 100 according to an exemplary embodiment of the present invention. The golf club head 100 shown in FIG. 1 may generally include a striking face 102, a rear body portion 104, and a hosel 105. The rear body portion 104 may generally further comprise a crown portion 106, a sole portion (not shown), and a skirt portion 110. The crown portion 106 is generally coupled to the upper portion of the striking face 102, while the sole portion (not shown) may be generally coupled to the lower portion of the striking face 102. The skirt portion 110 may be generally disposed between the crown portion 106 and the sole portion (not shown) to complete the posterior body portion 104, as shown in current example embodiments.

  The golf club head 100 may generally include a radiused transition portion 116, as shown in the current example embodiment illustrated by FIG. Surround at least the surroundings. More specifically, as can be understood from FIG. 1, the R-shaped transition portion 112 may further comprise a toe-side R-shaped transition portion 114 and a heel-side R-shaped transition portion 116, which are respectively in the impact face 102. Surrounding the striking face 102 near the toe and heel portions. Although the current example embodiment shown in FIG. 1 shows only the R transition portion 112 that covers the toe and heel portions of the golf club head 100, the R transition portion 112 departs from the scope and content of the present invention. Note that the perimeter of the striking face 102 may be completely enclosed to the extent that it does not.

1, a surface area of the striking face 102 is generally greater than about 3600 mm ^2, more preferably greater than 3700 mm ^2, and most preferably it should be noted that may be greater than about 3750mm ^2. Furthermore, the surface area of R with the transition portion 112 is generally less than about 850 mm ^2, more preferably less than 825 mm ^2, and most preferably may be less than about 810 mm ^2. Finally, the overall surface area of the golf club head 100 is between about 32000 mm ² and about 35000 mm ² . In relation to the surface area values described above, it is important to determine the ratio of the surface area of the striking face 102 to the overall total area of the golf club head 100. The striking face surface area ratio is generally greater than about 9%, more preferably greater than about 10%, and most preferably greater than about 11%. Alternatively, the above surface area also determines the R-transition partial surface area ratio. The R-transitioned portion surface area is generally less than about 3.0%, more preferably less than about 2.75%, and most preferably less than about 2.5%.

FIG. 2 shows a front view of a golf club head 200 in accordance with an exemplary embodiment of the present invention. The front view of this golf club head 200 can more directly show the striking face 202, which is strikingly oval, with the main shaft 220 running significantly from the heel to the toe, Shows a remarkable run from crown to sole. The striking face 202 of the golf club head 200 according to an exemplary embodiment of the present invention generally has an ellipticity factor of greater than about 0.33, more preferably greater than about 0.41, and most preferably about 0.50. It can be accompanied. The elliptic factor discussed above may be defined by Equation 1 below.
Elliptic factor = length of minor axis 222 / length of principal axis 220 Formula (1)

  The major axis length 220 may be generally defined as the distance of the longest line that can be drawn on the striking face 202. In the current example embodiment shown here in FIG. 2, the main shaft 220 extends significantly in the heel-to-toe direction, but the main shaft 220 is oriented in any other direction deviating from the current orientation. Also good. However, it represents the longest line that can be drawn on the striking face 202 without departing from the scope and content of the present invention. The minor axis 222 may be generally defined as a line that runs perpendicular to the major axis 220 and traverses the striking face 202 as shown in the current example embodiment, but the geometric center 201 of the striking face 202. Pass through. In some embodiments, the geometric center 201 of the striking face 202 is located at the midpoint of the minor axis 222. In another embodiment, the geometric center 201 of the striking face 202 is outlined by the procedure for measuring golf club head flexibility, USGA-TPX3004, version 1.0.0, May 1, 2008, by the United States Golf Association. Is defined by the center of the collision spot determined by the collision position template described.

  The length of the main shaft 220 may generally be less than about 120 mm (millimeters), more preferably less than about 110 mm, and most preferably less than about 100 mm, as shown in current example embodiments. . On the other hand, the length of the minor axis 222 may generally be greater than about 40 mm, more preferably greater than about 45 mm, and most preferably greater than about 50 mm, as shown in current example embodiments. . Therefore, when the length of the short axis 222 is divided by the length of the main axis 220, the resulting elliptic factor may be in the range previously discussed.

  The front view of the golf club head 200 shown in FIG. 2 shows how much the striking face 202 of the golf club head 200 is tilted to a more upright position even when the golf club head 200 is maintained in a relatively flat position. Help to show. In other words, the vertical minor axis 222 of the striking face 202 may generally be inclined by an angle θ when compared to the vertical axis 223 perpendicular to the ground 225. The angle θ is generally greater than about 3.0 degrees and less than about 16.0 degrees, and more preferably greater than about 3.0 degrees and about 12 degrees, as shown in current example embodiments. It may be less than 0.0 degrees, and most preferably greater than about 3.0 degrees and less than about 8.0 degrees. As can be understood from FIG. 2, the inclination of the hitting face 202 of the golf club head 200 with respect to the ground 225 causes the main shaft 220 and the short shaft 222 to be inclined in the same direction by the same degree. Viewed another way, the slope of the striking face 202 is greater than about 3.0 degrees and less than about 16.0 degrees, more preferably less than about 16.0 degrees, with the major axis 220 and minor axis 222 moving from high toe to low heel. It can also be defined as tilting by an angle greater than 3.0 degrees and less than about 12.0 degrees, and most preferably greater than about 3.0 degrees and less than about 8.0 degrees.

  It is useful to look at FIG. 3 to understand the reason behind the slope of the striking face 202 of the golf club head 200, which shows a golfer's typical impact pattern against the striking face 202, and the points on the graph Indicates a typical hitting position when a golfer hits a golf ball with a golf club. F. Werner and R.W. Greg, How Golf Clubs Really Working and How to Optimize The Designs, Ch. 4, pp. As reported in 17-21 (2000), the typical dispersion of golf ball hits on the face of a driver club follows an elliptical pattern with the major axis oriented from high toe to low heel. It matches the elliptical pattern shown in FIG. Examining the collision pattern shown in FIG. 3 closer, it can be seen that the main axis 320 of the impact pattern forms an angle α with respect to the horizontal axis 323. This angle α may generally coincide with the inclination angle θ of the hitting face 202 of the golf club head 200 shown in FIG. More specifically, α is generally greater than about 3.0 degrees and less than about 16.0 degrees, more preferably greater than about 3.0 degrees and less than about 12.0 degrees, most preferably It is larger than about 3.0 degrees and smaller than about 8.0 degrees.

  Returning to FIG. 2, it can be seen from the striking pattern shown in FIG. 3 that the striking face of the golf club head 200 is preferably tilted by an angle θ corresponding to the tilt angle α of the impact pattern. It is more important that the major axis 220 and the minor axis 222 are inclined than the inclination of the striking face 202 of the golf club head 200. This is because the hitting face 202 can be made to more closely match the typical hitting pattern shown in FIG. 3 by inclining the above-mentioned axis.

  Referring to FIG. 4, this shows another front view of a golf club head according to an embodiment of the present invention, where the golf club head 400 is located near the geometric center 401 of the striking face 402 of the golf club head 400. It can be seen that the sweet spot 430 is shown. More specifically, the sweet spot 430 may generally be concentric with the geometric center 401 of the striking face 402 of the golf club head 400. In the context of this application, the sweet spot 430 is generally defined as the area of all striking faces 402 that can achieve at least 99.7% of the maximum ball speed achievable by the golf club head 400. good. A value of 99.7% would be reasonable to use in determining the size of the sweet spot 430. This is because a golf ball that can achieve 99.7% of the maximum ball speed is about 1/2 when compared to a direct center hit that achieves 100% of the maximum ball speed that can be achieved with the golf club head 400. Only mile, par, and time are lost. The maximum ball speed that can be achieved with the golf club head 400 as shown in the current example embodiment is generally achieved with the golf club head, regardless of where the golf club head 400 strikes the golf ball. It will be related to the highest ball speed possible.

  In some embodiments, the golf club head may include various features that affect the position of the sweet spot relative to the geometric center of the golf club head's striking face. Examples of such features may be found in “Golf Clubs with Bends” in US Patent Application No. 14 / 089,574 of Golden et al., Filed Nov. 25, 2013, filed by the present applicant. The contents of which are incorporated herein by reference. As shown in FIG. 5, the bent portions 536 and 538 are examples of features that allow the sweet spot to move away from the geometric center of the hitting face. Bends 536, 538 are generally formed in the front portion of the crown, sole, and / or skirt. The bent portion 536 generally extends in a toe direction from the heel and has a long wave shape formed at the front portion of the sole. The bent portion 538 is formed in the front portion of the crown. The bent portions 536 and 538 are generally flexible in the front-rear direction, and are separated from the striking face 502 to realize a flexible portion of the club head 500. When the striking face collides with the golf ball, the collision point In addition to bending at a position close to, a part of the striking face 502 reciprocates as a unit and rotates. The bent portions 536 and 538 can realize improved performance with respect to the collision of the center face with the golf ball as well as the collision between the hitting face 502 and the golf ball.

  FIG. 6 illustrates the bend 636 formed in the front portion of the sole portion 608. The bent portion 636 generally extends in the toe direction from the geometric center of the striking face 602, which extends in the heel direction. Golf club head features such as toe biased bends 636 can asymmetrically affect the stiffness of the golf club head, thereby affecting the position of the sweet spot 630 on the striking face. FIG. 6 illustrates how the bend 636 moves the sweet spot 630 from the geometric center 601 of the striking face 602 in the toe direction. Other structures, features, or asymmetries in the golf club head design can also move the sweet spot 630 from the geometric center 601 of the golf club head 600.

  As discussed above, the sweet spot is preferably located at the geometric center of the striking face, as illustrated in FIG. FIG. 7 shows a golf club head 700 according to an exemplary embodiment of the present invention, which includes a striking face 702 with a variable face thickness profile 740. Golf club head 700 may include a striking face 702 with a variable face thickness profile 740 behind the striking face 702, as illustrated in FIG. More specifically, the variable face thickness profile 740 may generally have a thick central portion 742 surrounded by a transition portion 743, as shown in the example embodiment, and the transition A portion 743 is surrounded by a thin peripheral portion 744. The striking face 702 of the golf club head 700 deforms like a trampoline when striking a golf ball, so that with a variable face thickness profile, the thin peripheral portion 744 of the striking face 702 provides a trampoline effect. And yet the thick central portion 742 of the variable face thickness profile 740 can be thick enough to withstand the stress associated with impact with a golf ball. The radiused transition portion 112 (shown in FIG. 1) can provide additional structural rigidity to the striking face 702 of the golf club head 700, thereby allowing the golf club head striking face 702 to be thinner and larger. Form a sweet spot. More specifically, because of increased structural rigidity, the thickness of the thin peripheral portion 744 can be less than about 3.00 mm, more preferably less than about 2.9 mm, and most preferably about 2 Less than 8mm thickness. A more detailed disclosure can be found in US Pat. No. 7,029,403 (Rice et al.) Regarding the use of variable face thickness to improve the performance of golf club heads, the contents of which are hereby incorporated by reference Incorporate

  FIG. 7 also illustrates the bend 736. The bent portion 736 is separated from the striking face 702. The bend 736 includes a front wall 771, a back wall 772, and a top 773. Both the front wall 771 and the back wall 772 extend inside the golf club head 700. Front wall 771 and back wall 772 are joined at top 773.

  FIG. 8 shows a front view of the internal geometry of the golf club head of FIG. 7 with a variable face thickness profile 740. FIG. 8 shows the relative dimensions and positions of the thick central portion 742, the transition portion 743, and the thin peripheral portion 744. More specifically, FIG. 8 shows a thick central portion 742 that is offset from the geometric center 701 of the striking face 702. As discussed and illustrated above in FIG. 6, various golf club head structures or features such as bend 636 can form a sweet spot 630 that is not centered on the striking face geometric center 601. As illustrated in FIG. 8, the striking face 702 incorporates a variable face thickness profile 740 in which the thick central portion 742 is offset in the toe direction of the golf club head 700, so that the sweet spot has a striking face 702 geometry. It can be concentrated around the center 701. In other embodiments, the thick central portion 742 can be offset in the heel direction of the golf club head 700. In some embodiments, the thick central portion 742 is offset in the same direction as the bend 736, as illustrated in FIG. By positioning the thick central portion 742 at a position that is offset from the geometric center 701 of the strike face 702, the sweet spot is located from a less ideal position as illustrated in FIG. 6 to the geometry of the strike face 702 as illustrated in FIG. 4. It can be moved to a more ideal position centered around the center 701, which causes the golf club head 700 to shift a sweet spot, such as a bend 736, otherwise from the geometric center 701. This is also the case, as illustrated in FIGS.

  FIG. 9 is a reproduction of a front view of the internal geometry of the golf club head 700 from FIG. 9 and shows a plurality of portions relating to the position of the variable face thickness profile 740 and the bend 736 relative to the geometric center 701 of the striking face 702. Various embodiments of the invention are further described, including the relationship. As discussed and illustrated above in FIG. 6, various golf club head structures or features, such as bends, can modify the flex characteristics of the striking face 602 and are not centered on the striking face geometric center. 630 can be formed. FIG. 9 illustrates that in one embodiment, the bend 736 or other golf club head feature can extend further in the toe direction rather than the heel of the golf club head 700.

  As illustrated in FIG. 9, the center 737 of the bent portion 736 is indicated by X and is offset from the geometric center 701 in the toe direction of the golf club head by a distance A. The distance A is measured along an axis parallel to the main axis 220 illustrated in FIG. 2 and discussed above, along with distances BH described below. The center 737 of the bent portion 736 is positioned substantially equidistant from the most toe side portion of the bent portion 736 and the most heel side portion of the bent portion 736. Therefore, the center 737 of the bent portion 736 is defined by the distance B and the distance C equal to this, where the distance B is the distance between the center 737 and the most toe side portion of the bent portion 736, and the distance C is a distance between the center 737 and the most heel side portion of the bent portion 736. In some embodiments, the center 737 of the bend 736 is offset from the geometric center of the club head by a distance A, as illustrated in FIG.

  In some embodiments, the distance A may be between 0.25 mm and 15 mm. In some embodiments, the distance A may be between 1 mm and 10 mm. In some embodiments, the distance A may be between 2 mm and 8 mm. In some embodiments, the distance A may be between 3 mm and 7 mm. In some embodiments, the distance A may be between 4 mm and 6 mm. In some embodiments, the distance A may be greater than 1 mm. In some embodiments, the distance A may be greater than 2 mm. In some embodiments, the distance A may be greater than 3 mm. In some embodiments, the distance A may be greater than 4 mm. In some embodiments, the distance A may be greater than 5 mm.

  As discussed above in connection with FIGS. 8 and 9, the thick central portion 742 may be offset from the geometric center 701 of the striking face 702. FIG. 9 illustrates the center 741 of the thick central portion 742, indicated by X, which is offset by a distance D from the geometric center 701 of the striking face 702 in the direction of the toe of the golf club head 700. The center 741 of the thick central portion 742 is positioned substantially equidistant from the toe portion of the thick central portion 742 and the heel side portion of the thick central portion 742. Accordingly, the center 741 of the thick central portion 742 is defined by a distance E and a distance F equal thereto, where the distance E is the distance between the center 741 and the most toe side portion of the thick central portion 742. The distance F is the distance between the center 741 and the heel side portion of the thick central portion 742. In some embodiments, as illustrated in FIGS. 8 and 9, the golf club head has a bend 736 with the center 737 displaced in the toe direction and a thick central portion 742 with the center 741 displaced in the toe direction. May have. In some embodiments, the center 741 of the thick central portion 742 may be offset from the geometric center 701 by a distance D, which is substantially similar to the distance A, where the center 737 of the bend 736 is at the geometric center 701. It is the distance which has deviated from.

  In some embodiments, the distance D may be between 0.25 mm and 15 mm. In some embodiments, the distance D may be between 1 mm and 10 mm. In some embodiments, the distance D may be between 2 mm and 8 mm. In some embodiments, the distance D may be between 3 mm and 7 mm. In some embodiments, the distance D may be between 4 mm and 6 mm. In some embodiments, the distance D may be greater than 1 mm. In some embodiments, the distance D may be greater than 2 mm. In some embodiments, the distance D may be greater than 3 mm. In some embodiments, the distance D may be greater than 4 mm. In some embodiments, the distance D may be greater than 5 mm.

  As previously discussed and illustrated in FIG. 9, the variable thickness profile 740 includes a transition portion 743 and a thin peripheral portion 744 in addition to the thick central portion 742. In some embodiments, the transition portion 743 is substantially centered with respect to the thick central portion 742, where the distance G is from the toe-most portion of the transition portion to the center 741 of the thick central portion 742. The distance H represents the distance from the most heel side portion of the transition portion to the center 741 of the thick central portion 742, where the distance G is substantially equal to the distance H. In some embodiments, distance G and distance H are between about 15 mm and 30 mm, respectively. In some embodiments, distance G and distance H are between about 20 mm and 25 mm, respectively. In some embodiments, distance G and distance H are between about 22 mm and 24 mm, respectively. In other embodiments, the transition portion 743 may not be centered with respect to the thick central portion 742 and the distance G may not be equal to the distance H. In some embodiments, the transition portion 743 may deviate from the thick central portion 742 in the heel direction, where the distance H is greater than the distance G. In some embodiments, distance H is greater than distance G by at least 1 mm. In some embodiments, distance H is greater than distance G by at least 2 mm. In some embodiments, the distance G is greater than the distance H by at least 1 mm. In some embodiments, the distance G is greater than the distance H by at least 2 mm.

  In some embodiments, the center 737 of the bend 736 may not deviate from the geometric center of the striking face 702, but still provides asymmetric stiffness characteristics to move the sweet spot away from the geometric center 701. Asymmetric stiffness characteristics can be achieved by a plurality of structures, including, for example, asymmetric size ratios, asymmetric thicknesses, asymmetric curvatures, hosel structures, asymmetric ribs, and the like. Accordingly, in some embodiments, the golf club head 701 may include a bend 736 that does not shift the center 741 from the geometric center 701 and a thick central portion 742 that shifts the center 741 from the geometric center 701. In other embodiments, the center 741 of the thick central portion 742 may be offset in the heel direction. In some embodiments, the center 741 of the thick central portion 742 may be offset to the portion of the golf club head that includes the bend 736 and the more flexible portion of other golf club features.

One method of measuring the characteristics of the striking face is characteristic time (CT). CT measurements are outlined in the US Golf Association procedure for measuring golf club head flexibility, USGA-TPX3004, revision 1.0.0, May 1, 2008. CT can be measured at various locations on the striking face 702 of the golf club head 700. CT can be measured at the geometric center 701 of the striking face 702 (CT _Center ). CT is shifted from the geometric center 701 of the striking face 702, for example, a point shifted 0.5 inches in the toe direction from the geometric center 702 along an axis parallel to the main axis (CT _{Toe-0.5 "} ), or It can be measured at a point (CT _{Heel-0.5 "} ) shifted 0.5 inches in the toe direction from the geometric center 702 along an axis parallel to the main axis. In some embodiments, the golf club head 700 may have a CT relationship of | (CT _{Toe-0.5 "} / CT _Center ) -1 | <= 0.06. The club head 700 may have a CT relationship of | (CT _{Heel−0.5 ”} / CT _Center ) −1 | <= 0.06.

For example, in one embodiment of a golf club head, CT _Center is 235, CT _{Toe-0.5 "} is 247, and CT _Heel-0.5" is 234. The absolute value of (CT _{Toe-0.5 "} / CT _Center ) -1 is equal to 0.051064, which satisfies | (CT _Toe-0.5" / CT _Center ) -1 | <= 0.06. Also, the absolute value of (CT _{Heel-0.5 "} / CT _Center ) -1 is equal to 0.012766, which is | (CT _Heel-0.5" / CT _Center ) -1 | <= 0.06. Fulfill. In other embodiments, the golf club head 700 may have a CT relationship of | (CT _{Toe-0.5 "} / CT _Center ) -1 | <= 0.05. In another embodiment, the golf club head. 700 may have a CT relationship of | (CT _{Heel-0.5 "} / CT _Center ) -1 | <= 0.05. In other embodiments, the golf club head 700 may have a CT relationship of | (CT _{Toe-0.5 "} / CT _Center ) -1 | <= 0.04. In another embodiment, the golf club head. 700 may have a CT relationship of | (CT _{Heel-0.5 "} / CT _Center ) -1 | <= 0.04. In other embodiments, the golf club head 700 may have a CT relationship of | (CT _{Toe-0.5 "} / CT _Center ) -1 | <= 0.03. In another embodiment, the golf club head. 700 may have a CT relationship of | (CT _{Heel-0.5 "} / CT _Center ) -1 | <= 0.03.

  FIG. 10 of the accompanying drawings shows a cross-sectional view of a golf club head according to an alternative embodiment of the present invention. More specifically, the present invention improves performance by adjusting the different stresses generated by the golf club head 1000 when impacting a golf ball by varying the thickness at different portions of the bend 1036. Doing so, incorporate a portion of bend 1036. The flexure 1036 in this embodiment generally comprises a thickened front wall 1071 and a thickened back wall 1072 with a thickest top 1073. Due to the fact that different stress levels may occur at different locations within the bend 1036, the various portions of the bend may each have a unique thickness without departing from the scope and content of the invention. More specifically, the front wall 1071 may have a first thickness d1, the top 1073 may have a second thickness d2, and the back wall 1072 has a third wall d3. Good.

  FIG. 11 shows an enlarged view of the circular region A shown in FIG. 10, and the front wall 1072, the back wall 1072, and the top 1073 of the bent portion 1036 are clearly shown together with the respective dimensions. More specifically, the portion of the sole connected to the front wall 1071 generally has a thickness of about 0.8 mm at the portion leading to the front wall 1071, and the thickness of the front wall 1071 is greater than about 1.10 mm. More preferably greater than about 1.20 mm and most preferably greater than about 1.30 mm. This thickened front wall 1071 can generally help improve the durability of the bend 1036 because the portion of the front wall 1071 of the bend 1036 is generally subjected to high stress levels. is there. Beyond the front wall 1071, the bent portion 1036 reaches the top portion 1073. As shown in this example embodiment of the invention, the top 1073 has the largest wall thickness d2 of the entire bend 1036. In an exemplary embodiment of the present invention, the thickness d2 of the top 1073 is generally greater than about 1.50 mm, more preferably greater than about 1.60 mm, and most preferably greater than about 1.75 mm. Finally, the bend 1036 has a back wall 1072, whose thickness d3 is greater than about 1.10 mm, more preferably greater than about 1.20 mm, most preferably greater than about 1.30 mm, and the bend The portion 1036 transitions to the sole of the golf club head 1000.

  Based on the foregoing, the bend 1036 may have a thickness of the front wall 1071 that is equal to the thickness of the back wall 1072, but the maximum thickness of the bend 1036 generally occurs at the top 1073. It ’s okay. The maximum thickness is generally greater than about 120% of the thickness of the front wall 1071 and the back wall 1072, more preferably greater than about 125% of the thickness of the front wall 1071 and the back wall 1072, most preferably It is greater than about 130% of the thickness of the front wall 1071 and the back wall 1072.

  FIG. 12 of the accompanying drawings shows a cross-sectional view of a golf club head 1200 according to another alternative embodiment of the present invention, wherein the thickness of the bend 1236 varies between the front wall 1271 and the back wall 1273. In fact, in this embodiment of the invention, the thickest part may move from the top 1273 to the front wall 1271, and the top 1273 will act as a transition point rather than the desired wall thickness. Further, this embodiment of the present invention may incorporate thickness changes in the heel and toe orientation at the bend 1236 without departing from the scope and content of the present invention.

  FIG. 13 is an enlarged view of the circular region B shown in FIG. 12, and the special configuration and thickness of the bent portion 1236 are clearly shown. The bent portion 1236 shown in FIG. 13 includes the bent portion 1036 shown in FIG. 11 and the bent portion 1236 having a thick front wall 1271 and a slightly thick rear wall, and the thickest portion in the bent portion 1236 is It is different in that it is not the top portion 1273. More specifically, the front wall 1271 shown in this embodiment of the invention has a thickness d1 that is greater than about 1.30 mm, more preferably greater than about 1.40 mm, and most preferably greater than about 1.50 mm. You can do it. The back wall 1272 shown in this embodiment of the invention may have a thickness d3 that is greater than about 1.20 mm, more preferably greater than about 1.30 mm, and most preferably greater than about 1.40 mm. In this embodiment of the invention, the top 1273 is no longer the thickest part in the bend 1236 because the front wall 1271 is thicker, but rather between the front wall 1271 and the back wall 1272. Acts as a transition part that changes the thickness.

  FIG. 14 shows a cross-sectional view of the golf club head 1200 along a plane orthogonal to the striking face so that the entire bend 1236 can be shown along the heel-to-toe direction. In this cross-sectional view, it can be seen that the thicknesses of the front wall 1271 and the back wall 1273 do not remain constant in the heel / toe direction along the entire length of the bent portion 1236. In fact, in an alternative embodiment of the invention, the thickness of the front wall 1271 and the back wall 1273 is controlled only in the central part with a distance d4 of about 20 mm. It is not noted that the central portion need not be located just at the geometric center of the striking face. This is because the position where the stress is greatest often occurs at a position slightly deviated from the geometric center of the striking face. In this embodiment of the invention, the central portion may be disposed at a position about 9.0 mm away from the geometric center of the striking face in the toe direction.

  This embodiment of the present invention gradually reduces the wall thickness when the bent portion 1236 moves away from the central portion of the bent portion 1236 in order to reduce the wall thickness of the bent portion 1236 in a portion that is not subjected to large stress. ing. The wall thickness of the intermediate transition region 1274 may generally be less than the wall thickness of the back wall 1272, while the wall thickness of the outer transition region 1276 may be further thinner than the wall thickness of the intermediate transition region 1274. More specifically, in this embodiment of the invention, the front wall 1271 is generally between about 1.50 mm and about 2.0 mm thick, more preferably between about 1.60 mm and about 1.90 mm. A thickness of between about 1.65 mm and about 1.85 mm. The back wall 1272 according to this embodiment of the invention may be generally thinner than the front wall 1271, and may be between about 1.20 mm and about 1.70 mm thick, more preferably between about 1.30 mm and about 1 A thickness of between .60 mm, most preferably between about 1.35 mm and about 1.55 mm may be provided. The intermediate transition region 1274 may generally be slightly thinner than the back wall 1272 and has a thickness between about 1.10 mm and about 1.60 mm, more preferably between about 1.20 mm and about 1.50 mm. A thickness may be provided, most preferably between about 1.25 mm and about 1.45 mm. Finally, the outer transition region 1276 may be generally thinner than the intermediate transition region 1274, with a thickness between about 0.80 mm to about 1.10 mm, more preferably from about 0.85 mm to about 1.. It may comprise a thickness between 05 mm, most preferably between about 0.90 mm and about 1.00 mm.

  Based on the foregoing, the bend 1236 may generally have the thickest portion located on the front wall 1271 and may have the next thickest portion located on the back wall 1272. It can be said that this may be followed by an intermediate transition region 1274 and the outer transition region 1276 may have the thinnest wall thickness.

  In the preferred embodiment of the present invention, the thickness changes of the various portions of the golf club head, including the striking face and the bend area, may generally be achieved by simply increasing the wall thickness. However, in alternative embodiments of the invention, various thickness changes may be used to change the thickness of the internal weight pad, external weight pad, or wall without departing from the scope and content of the invention. It can be realized through any other kind of mechanism that can.

  It is important to note that the flexure is not the only golf club feature that changes the flex characteristics of the golf club head when it hits the golf ball. Other features may include, for example, wall thickness, curvature, ribs, weight ports, hosel structures, etc., which have an asymmetrical effect on the stiffness of the golf club head, resulting in a sweet spot on the golf club head striking face Can affect the position of. Various embodiments of the variable thickness profile discussed here as well as the moved thick central portion may be employed in combination with a plurality of golf club head features in addition to the bends discussed herein.

  In other embodiments, the golf club head may be formed from a plurality of parts that are combined together to form the golf club head. In some embodiments, the sole portion and the striking face can be formed from a single piece using a technique called superplastic forming. Superplastic forming is performed at high temperatures and sometimes in vacuum, allowing the forming process to stretch the material significantly compared to conventional cases. This process is particularly attractive for treating disturbing materials. In some embodiments, instead of bringing a physical mold into contact with the surface of the material during deformation, a compressed gas is employed instead of the female mold to form the part. The compressed gas can apply a more uniform force while still minimizing the local friction that forms holes in the material. More complex geometries can be formed by super plastic forming. In addition, the super plastic forming can reduce or eliminate the spring back and can support more accurate manufacturing. In addition, unlike molded materials, the sole and striking face formed by superplastic forming have no alpha case or oxygen present on the surface, minimizing surface defects, creating a smooth surface, and chaining stress cracks. Can be minimized. In some embodiments, the various features discussed above, such as bends, and variable thickness profiles can be manufactured using superplastic forming, such as striking faces, soles, bends, and variable Includes thickness profile.

  In describing this technique, certain features described in the context of separate embodiments can also be implemented as a combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can be implemented separately in multiple embodiments and can be implemented in any suitable sub-combination. Further, a plurality of features may have been previously described as being implemented in a given combination, and as such may have originally been recited in the claims, but from such a described combination, 1 Or multiple features may be removed from the combination in some cases, and such claim combinations may be directed to sub-combinations or variations of sub-combinations.

  Various modifications to the embodiments described in this disclosure will be apparent to those skilled in the art, and the generic principles defined herein may be adapted to other implementations without departing from the spirit or scope of this disclosure. good. The claims are not intended to be limited to the embodiments shown, but are to be accorded the widest scope consistent with this disclosure and the principles and novel features disclosed herein. .

1200 Golf club head 1236 Bending portion 1271 Front wall 1272 Rear wall 1274 Middle transition region 1276 Outer transition region

Claims (7)

A golf club head,
Hitting face,
A rear body having a crown portion and a sole portion, wherein the crown portion is coupled to an upper portion of the striking face, and the sole portion is coupled to a lower portion of the striking face. ,
The sole portion further includes a bent portion spaced from the hitting face, and the bent portion is
A central portion located near the geometric center of the hitting face;
Two or more intermediate transition regions positioned near the toe and heel portions of the central portion;
Two or more outer transition regions positioned near the toe and heel portions of the two or more intermediate transition regions;
The central portion further has a front wall, a back wall, and a top,
The front wall has a wall thickness that is greater than the wall thickness of the back wall, and the back wall has a wall thickness that is greater than the wall thickness of the two or more intermediate transition regions, the 2 or more The golf club head according to claim 1, wherein the plurality of intermediate transition regions have a wall thickness greater than the wall thickness of the two or more outer transition regions.   The golf club head of claim 1, wherein the wall thickness of the front wall is between 1.50 and 2.0 mm.   The golf club head of claim 2, wherein the wall thickness of the front wall is between 1.60 mm and 1.90 mm.   4. The golf club head of claim 3, wherein the wall thickness of the front wall is between 1.65 mm and 1.85 mm.   The golf club head of claim 2, wherein the wall thickness of the back wall is between 1.20 mm and 1.70 mm.   6. The golf club head of claim 5, wherein the wall thickness of the plurality of intermediate transition regions is between 1.10 mm and 1.60 mm.   The golf club head of claim 6, wherein the wall thickness of the plurality of outer transition regions is between 0.80 mm and 1.10 mm.

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