JP4912277B2 - Metal wood club - Google Patents

Description

The present invention relates to an improved golf club. More specifically, the present invention relates to a wood-type golf club head with improved physical attributes.
This application is a continuation-in-part of US Patent Application No. 29 / 245,472, filed on December 23, 2005.

  Golf club heads come in many different forms and types, such as wood or metal-type (including drivers and fairway wood), iron-type (including wedge-type club heads), utility or special types, and putters There are types. Each of these styles has a defined function and structure. The present invention relates primarily to hollow golf club heads, such as wood-type and utility-type (generally referred to herein as wood-type golf clubs).

  Wood-type or metal-type golf club heads typically include a front face or striking face, a crown, a sole, and an arcuate skirt, which includes a heel, a toe, and a back. Crowns and skirts are often called shells. The front face hits and hits the golf ball. A plurality of grooves are formed on the face to serve to impart the spin of the ball and to achieve a decorative purpose, often referred to as a “score line”. The crown generally gives the golfer a special look and provides a solid structure for the striking face. The golf club sole is particularly important for golf shots because it contacts and interacts with the ground during a swing.

  It is known that the design of golf club heads is complex. The specifications of each part of the club (i.e., club head, shaft, grip, and these parts) directly affect club performance. Therefore, special performance characteristics can be realized by changing the design specifications to tailor the golf club.

  The design and manufacture of wood-type club heads requires careful attention to the club head structure. Many factors to consider include material selection, material processing, structural integrity, and overall geometric design. Examples of geometric design considerations include loft, lie, face angle, horizontal face bulge, vertical face roll, face size, center of gravity, sole curvature, and overall head weight. The club head internal design is finished to achieve specific features, for example by including hosel or shaft coupling means, club head face or body-like peripheral weights, and fillers in the hollow club head. Club heads are typically manufactured from stainless steel, aluminum, or titanium and are manufactured from casting, stamping by forming sheet metal under pressure, forging, or any combination of any two or more of these processes.

  The club head is formed from a plurality of elements, which are joined together by welding or the like to form a hollow head, which is often the case of the club head, which is designed with an insert such as a sole plate or a crown plate. The multi-element construction facilitates access to the cavity formed within the club head, thereby allowing various components, such as internal weights and club shafts, to be coupled to the head. The cavities may remain hollow and may be partially or completely filled, for example with a blowing agent. Adhesive may be injected into the club head to achieve an accurate swing weight, or any debris within the club head may be collected and held. Further, since it is difficult to manufacture a plurality of one-piece club heads with a highly accurate dimensional error, a club head can be manufactured with a close standard set by using a multi-part structure.

  It is known to make wood-type golf clubs from metallic materials. These clubs were originally manufactured by casting a strong metal, such as stainless steel, aluminum, beryllium copper, etc., to form a unitary structure including a metal body, face and hosel. As technology has advanced, it has become desirable to improve the performance of club faces. For example, this is achieved using a titanium material.

  Players typically seek a combination of a metal wood drive and a golf ball that achieves maximum distance and landing position accuracy. The ball flight distance after hitting is governed by the magnitude and direction of the translational speed of the ball and the rotation speed of the ball, that is, the spin. Environmental conditions including atmospheric pressure, humidity, temperature and wind speed further affect ball flight. However, the environmental effects are beyond the control of golf equipment manufacturers. The exact landing of a golf ball is also determined by many factors. Some of these factors are due to club head designs such as center of gravity and club head flexibility.

  Known techniques for improving the weight distribution of a wood-type club head so that the club does not open when in contact with the ball are usually to add weight to the body casting itself, Including strategically adding weight elements in place. Many efforts have been made to incorporate heavy elements into wood-type club heads. These weight elements are usually placed in place, which has a positive effect on the flight of the ball and eliminates the disadvantages of certain golfers.

  The club head sole is particularly important in golf shots because it interacts in contact with the ground during golf shots. There are many sole structures that maximize the performance of the club. Typically, the club sole is slightly bent so that when the club head is placed on the ground, its tip is above the ground. Bending to the front of the club generally achieves bounce. Bounce prevents the club from entering the ground and substantially reducing the club head speed. Bends to the rear end generally prevent the club head from hitting the ground during backswing.

  The present invention is directed to an improved golf club sole of a wood-type golf club that improves the operability of the club. Furthermore, the present invention is directed to an improved weighting system for wood-type golf clubs that improves the operability of the club.

  The invention has a face, a sole, a crown, and a body having a heel end and a toe end having a skirt connecting the face, sole, and crown, the body bouncing at zero degrees on the sole The present invention relates to a golf club head having an address position forming a part and a central sole position forming a negative bounce part on the sole. In one embodiment, the negative bounce portion has a surface of minus 0.5 to minus 4.0 degrees, and preferably has a surface of at least minus 2.0.

  The negative bounce portion may further include a cutout portion that extends to the back of the sole. The depth of this notch may be about 0.05 to 0.5 inches. The negative bounce portion may be generally triangular or parabolic. The negative bounce portion may be disposed on the sole at a distance of about 0.1 to 1.0 inches from the face of the club head, and preferably about 0.35 to 0.65 inches from the face of the club head. It may be arranged at a distance.

  In another embodiment, a golf club according to the present invention has a face, a sole, a crown, and a body having a heel end and a toe end, and a skirt connecting the face, sole, and crown. Where the first measurement of the face is a scar when the toe end is at least 5 degrees above, and the second measurement of the face at the center position is different from the first measurement. . The face measurement may be more open at least twice in the second measurement and may be open at least twice. The central location may have a negative bounce portion. A second measurement of the center position may be made upon impact of the club head with the golf ball. In the second measurement, the shaft angle may be about 55 to 60 degrees from the ground. The first measurement is taken at the address position and the shaft angle may be about 55 to 45 degrees from the ground.

  In another embodiment, the present invention relates to a golf club head having a face, a sole, a crown, and a skirt connecting the face, the sole, and the crown, and a body having a center of gravity. The main body has a coordinate system consisting of an x-axis arranged parallel to the club face, a y-axis orthogonal to the club face, and a z-axis passing through the club face, where the center of gravity is at least along the z-axis and y-axis. Can be adjusted. The center of gravity is movable within a distance of 6 mm along the z axis, and more preferably is movable within a distance of 4 mm along the z axis. The center of gravity is movable within a distance of 6 mm along the y axis, and more preferably within a distance of 2 mm along the y axis. The center of gravity is movable within a distance of 2 mm along the x axis, and more preferably is movable within a distance of 0.5 mm along the x axis.

  The weight system may have at least one tube disposed within the club head within the plane formed by the y-axis and the z-axis to adjust the center of gravity. In one embodiment, a plurality of inserts having different weights may be placed at various positions within the tube to move the center of gravity to a desired position. Alternatively, a weight is provided at one end of the tube, which is placed in the club head to move the center of gravity to the desired position to achieve the desired ball flight. The tube may be angled by at least 3 degrees downward from the z-axis toward the face of the club head, more preferably from about 3 to about 7 degrees.

  The tube may be reversible so that the weight can be moved to the other end of the club head to move the center of gravity to achieve the desired other ball flight. When the weight is located at the back of the club head, shots launched from the club head have increased back spin, have a higher launch angle, and achieve a softer landing. When the weight is located in front of the club head, shots launched from the club head are accompanied by less backspin, resulting in a lower trajectory, shallower landing and increased distance.

  In one embodiment, the weight includes tungsten. The weight of the weight can be from about 10 grams to about 35 grams. The combined weight of the tube and weight is about 20 to about 40 grams. The tube may comprise aluminum. The tube may include a fastener at least at one end to facilitate attachment of the tube to the club head. The tube may be clamped inside the club head adjacent to the face. In an alternative embodiment, the tube may be clamped to the outside of the club head so that it is substantially flush with the club head body.

  In an alternative embodiment, the weight system may further include three cavities provided in the club head and three separate inserts provided to be disposed within the cavities, where Each insert has a different weight and may be placed in different cavities to move the center of gravity within the coordinate system.

  In still other embodiments, the weight system may further include a pipe for placement in the club head to move the center of gravity. At least one weight is slidably provided on the pipe to move the center of gravity to a desired position. The slidable weight may be moved manually along the shaft from the outside of the club head to the desired position. The pipe may be angled down from the z-axis by at least 3 degrees toward the face of the club head, more preferably from about 3 degrees to about 7 degrees.

  The above and other features of the present invention can be readily understood from the following description of the invention shown in the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of the specification, explain the principles of the invention and enable one skilled in the art to practice the invention.

  FIG. 1 shows a golf club head 10 of the present invention. The club head 10 includes a striking face 14, a sole 16, a crown 18, a body 12 with a skirt 20, and a hosel 22. The body forms a hollow interior volume 24 (see FIGS. 4B-4D). Foam or other material may be partially or completely filled into the internal volume. Weights may be included in this internal volume. The face may be provided with grooves or scores of various designs. The club head includes a toe 26 and a heel 28.

  A golf club shaft (not shown) is coupled to hosel 22 and is disposed along shaft axis A-A. The hosel 22 may extend as far as the club head 10, may terminate at a position between the sole and crown portions 16, 18 of the club head 10, or the hosel 22 may terminate flush with the crown portion 26. May be.

  It is recommended that the volume of the inner volume 24 be greater than 125 cubic cm, preferably greater than 175 cubic cm. Preferably, the mass of the club head 10 of the present invention is greater than 150 grams but less than 220 grams. However, the club head may have any appropriate weight. The body 12 may be manufactured from integrally welded sheets or casting, and preferably from steel, aluminum, or titanium or any suitable other material or combination thereof.

  The skirt 14 may be manufactured by milling, casting, forging, or stamp forming. Face 14 may be made from any suitable material including titanium, titanium alloys, carbon steel, stainless steel, beryllium copper, and other metals or composites. The thickness of the face 1 is any appropriate one and may be uniform or non-uniform. As can be readily appreciated, the face 14 may be coupled to the body 12 by any suitable means including adhesion and welding. Alternatively, the body 12 and the face 14 can be cast simultaneously to form a uniform shell so that the face 14 need not be glued or otherwise permanently secured to the body 12. Alternatively, the sole 16 or crown 18 may be manufactured separately and fitted into the rest of the body 12, as is known to those skilled in the art.

  The sole 16 preferably has a complex shape that accomplishes two purposes. The first objective is to realize a surface on which the club head 10 is seated at an address position that makes the face scar with respect to the target. A second object is to provide a sole shape that can be used in a club head having a normal sole and that realizes a larger gap than the gap with the ground at the time of impact. In order to achieve the first purpose, an address part, ie a zero degree bounce part 30 is provided. This portion has a sufficiently large area on the sole 16 to rest the club head thereon when the golfer places it in the address position. The zero degree bounce portion 30 may be a flat portion provided on the sole 16. The zero degree bounce portion 30 may be disposed just in the center on the back surface of the face 16, or may be provided closer to the heel 28 as shown. As shown in FIGS. 1 and 2, the sole 16 has a zero degree bounce portion 30 so that at the address, the club head 10 rests in this position and the face 14 is scarred relative to the target. . The zero degree bounce portion 30 allows the club head 10 to be seated just like a normal club head that does not have a complex shaped sole. Therefore, even the complicated sole of the club head 10 of the present invention does not adversely affect the manner in which the club head is seated at the address.

To achieve the second objective, a portion of the sole 16 is perforated to provide a multiple relief surface 32 with negative bounce. Preferably, a negative bounce portion 34 is provided on the sole 16 at a central location away from the face 14 of the club head 10. For this reason, the club head 10 has two bounce areas. As shown in FIGS. 3A and 3B, the impact position I _p of the club head 10 is different from the address position A _p because the shaft bends during impact and the position of the club head 10 moves due to the behavior of the golf swing. is there. Figure 3B shows a club head address position, where the face is scare the target, the shaft axis A-A is an angle with respect to the ground G, this is referred to as shaft angle beta _a. As shown in FIG. 3A, upon impact, the club head rotates upright by a slight angle and the shaft axis A-A makes a different angle with respect to the ground G, which is referred to as the shaft angle β _i .

Note that in one embodiment, the toe 26 may be at least 5 degrees up when the first measurement, for example, when the club head 10 is seated in the address position and the face 14 is in scar. At the time of the second measurement, for example, at the time of impact with the golf ball, the face 14 is different from that at the time of the first measurement. For example, the face 14 may be more open at least twice than during the first measurement during the second measurement, and may be open at least twice compared with the first measurement during the second measurement. Good. The central location has a negative bounce portion 34, which is a substantially flat surface. When performing a first measurement at the address position, the shaft angle beta _a is preferably about 55 to 45 degrees. When the second measurement is performed at the impact of the club head, the shaft angle β _i is about 55 to 60 degrees.

  As shown in FIGS. 1 and 2, the sole 16 is characterized by a multi-relief surface 32 that provides a larger ground clearance at the rear end 36 of the sole 16 to minimize friction with the lawn. In this configuration, the ground / sole contact point remains forward toward the tip of the striking face 14. Maintaining the ground / sole contact point forward improves directional control and ball flight distance due to the ability to suppress bounce or skip of the club head 10 to the ball. This is particularly noticeable for players who place the ball ahead of the stance or players who sweep the ball off the lawn with a shallow angle launch. Preferably, the sole of the multiple relief surface 32 is characterized by a negative bounce portion 32 and a notch portion 40.

  The negative bounce portion 34 may have any desired shape, and preferably the negative bounce portion 34 is triangular in shape as shown in FIGS. 4A-4D show the negative bounce portion 34 and the notch portion 40 in the sole 16. The cross section illustrated in FIGS. 4B and 4D shows the notch 40 compared to a typical surface of a typical club head sole 42. FIG. 4B shows a cross-section of the central portion of the club head 10 with a negative bounce portion 34 and a notch portion 40 compared to a typical surface of a typical club head sole 42.

The cutout portion 40 extends from the negative bounce portion 34 to the rear end 36 of the club head 10. As shown in FIGS. 4B to 4D, the notch portion 40 is continuous, and the negative surface may be gradually increased from the surface S extending along the bottom of the sole. Preferably, the depth d _cp of the notched portion 40 is about 0.05 to 0.5 inches from the typical surface of a typical golf club sole 42, and this depth may or may not be constant. FIGS. 5 and 6 show the club head back 44 and heel 28. The notched portion 40 can be sufficiently assumed.

  7A-7B show the layer cross section at the sole 16 of the club head 10 and its line 7B-7B, showing the multiple relief surface 32 of the sole 16. FIG. The negative bounce portion 34 is spaced a distance D1 from the striking face, which is preferably about 0.1 to 1.0 inches, and more preferably about 0.35 to 0 from the striking face 14 of the club head 10. .65 inches. The distance D1 may be different for different club heads because the distance D1 depends on the face evolution and the club head loft. As shown, the negative bounce portion 34 has a surface that forms an angle α from a plane S that extends along the bottom of the sole 16 parallel to the z-axis of the coordinate system through the club head. The negative bounce portion 34 has a surface of approximately minus 0.5 to minus 4.0 degrees, and the angle α is approximately minus 0.5 to minus 4.0 degrees from the surface S. Preferably, the negative bounce portion 34 has a surface of approximately minus 2.0 degrees. Note that the angle of the negative bounce portion 34 may be constant or may vary toward the back of the sole. Negative bounce portion 34 may have multiple radius locations.

  As shown, the multiple relief surface 32 includes a negative bounce portion 34 and a notch portion 40 that constitute a triangular shape. The triangular shape forms an angle φ, which is preferably 35 to 50 degrees, more preferably about 38 to 44 degrees. The length L of the negative bounce portion 34 and the notch portion 40 is preferably about 1 to 5 inches, more preferably about 2 to 4 inches.

Figure 8 shows an alternative embodiment of a source Lumpur 16. The club head 46 is characterized by a multiple relief surface 32 as described above. The multiple relief sole features a negative bounce portion 34 and a notch portion 40 as features. Note that the shape of negative bounce portion 34 and notch portion 40 may be any suitable shape.

  Generally, the center of gravity of the club head is moved to the bottom and back of the club head to increase the sweet spot. This allows the average golfer to launch the ball high in the sky, quickly launch it and fly the ball far away. Furthermore, the moment of inertia of the club head is increased to minimize distance and accuracy penalties associated with off-center hits. Increasing the overall weight of the club head In order to move the weight downward and to the publication in the pear, material or mass is generally taken from one area of the club head and transferred to the other. Material can be taken from the face of the club in a thin club face and taken from the crown and / or sole and placed on the back of the club.

  FIG. 9 shows the top of a club head 50 according to another embodiment of the present invention. The club head 50 includes a striking face 54, a sole 56 (see FIGS. 10A and 10B), a crown 58, a body 52 with a skirt 60, and a hosel 62. The body forms a hollow interior volume 64 (see FIGS. 10B and 12B). The face may be provided with grooves or scores of various designs. The club head includes a toe 66 and a heel 68.

  FIG. 9 shows the center of gravity (c.g.) along the x and z axes. In order to improve the operability of the club head 50, c. g. It is desirable to be able to move to a more preferred position. Preferably, the club head 50 has a weight system 70 (see FIGS. 10A-10B and 12A-12B) as a feature thereof, and c. g. Move to a more ideal position. Preferably, c. g. Can be moved over a distance of 6 mm along the z-axis compared to a club head without a weight system. More preferably, it can be moved in the range of a distance of 4 mm along the z-axis. c. g. May be moved along the x-axis in a distance range of 6 mm compared to a club head without a weight system, more preferably in a distance range of 2 mm, more preferably a distance of 0.5 mm. It may be possible to move within the range. And c. g. Can be moved over a distance of 6 mm along the y-axis compared to a club head without a weight system (see FIGS. 10A-10B and 12A-12B). Preferably, c. g. Can be moved in the range of a distance of 2 mm along the y-axis.

  c. g. Adjustable will not substantially affect the loft behavior of the club head. For example, for a 3 mm front-back movement, the loft behavior only changes about 0.4 degrees. c. g. Backspin increases as it moves backward, e.g., c. g. The backspin is increased by an increase between 100 and 300 rpm per 3 mm of movement toward the rear surface.

  FIG. 10A illustrates the front face 54 of the club head, showing the x-axis and the y-axis. 10B is a cross-sectional view taken along line 10B-10B of FIG. 10A. FIG. 10B shows the interior of the club head, which features a weight system 70 according to the present invention, c. g. Is movable along the z-axis and the y-axis.

  FIG. 10B shows the club head c.c. being positioned within the plane formed by the y and z axes. g. A tube 72 that adjusts the weight is shown as a weight system 70. It should be noted that more than one tube 72 may be provided inside the club head 50 as shown in FIG. As shown in FIG. 10B, the weight system 70 features a tube 72 having a weight 74 at one end 76 thereof. As shown in FIG. 10B, the weight 74 is disposed on the back of the club head 50 and c. g. Is moved to the desired position for the desired ball flight. When the weight 74 is placed on the back of the club head 50, shots launched from the club head 50 have increased back spin and increased launch angle resulting in a soft landing. In an alternative embodiment, the tube 72 is characterized by a plurality of inserts having different weights disposed in the tube 72 and c. g. Note that may be moved to a desired position.

  As shown, the tube 72 is preferably provided at an angle within the club head 50. The tube 72 is angled downward with respect to the face 54 of the club head 50 so that the tube 72 is provided in a plane formed by the z-axis and the y-axis. The tube 72 is angled by an angle δ, where δ is at least 1 degree with respect to the plane W formed by the z-axis and the x-axis. Preferably, the tube 72 is angled at least 3 degrees below the face 54 of the club head 50 and relative to the plane W formed by the z-axis and the x-axis. More preferably, the tube 72 is angled about 3 to 7 degrees below the face 54 of the club head 50 and about a plane W formed by the z-axis and the x-axis. Although the tube 72 is described herein as being provided in a plane formed by the y-axis and the z-axis, the tube 72 may be offset from the surface in any desired amount in any direction. Easy to understand.

  12A-12B, the tube 72 is inverted in the club head 50 and a weight 74 is provided at the other end 76 of the club head 50 and is located closer to the face 54, c. g. It can be seen that can be moved to another position to achieve the desired ball flight. When the weight 74 is arranged in front of the club head 50, backspin caused by shots launched from the club head 50 is reduced, the trajectory is lowered, the landing is shallow, and the distance is increased. The tube 72 itself may be inserted into the club head with the weight 74 in either direction, and the one having the weight 74 at the desired end is selected from a different tube 72 and then the club. Note that the head may be provided.

  It can be readily appreciated that a club with a weight system 70, such as a tube 72 and weight 74, may include multiple relief surfaces 32 as described above on the sole 56. For example, in FIGS. 10B and 12B, the sole 56 may feature multiple relief surfaces 32 that include the negative bounce portion 34 and the notch portion 40 as described above. It can also be seen that the angle δ of the tube is substantially parallel to the multiple relief surface 32.

  FIG. 13 shows how the tube 72 can be inserted into the club head 50. The sheath 78 extends from the block 79 of the club head 50 and houses a tube 72 with a weight 74, and a fastener 80 secures the tube 72 within the club head 50 and locks it. The tube 72 is clamped to the outside of the club head 50 to be substantially flush with the outside surface of the club head, as shown in FIG.

  FIG. 15 shows a tube 72 according to the embodiment of FIG. A weight 74 is provided at the end 76 of the tube 72. Tube 72 and weight 74 may be coupled by screw engagement, epoxy, mechanism lock, or other coupling techniques. The weight 74 may comprise tungsten or any other suitable material. The weight 74 is about 10 to 25 grams. The combined weight of tube 72 and weight 74 is about 20 to 40 grams. Preferably, the tube 72 comprises aluminum, but any other suitable material may be employed.

Note that the orientation of the tube 72 may be set at the time of manufacture, may be changed by the user, or may be modified at the manufacturer or designated adjustment location. The diameter t _{d of the} tube 72 is about 0.3 to 0.5 inches and its length t _l is about 2 to 3 inches. More than one tube 72 may be provided in the club head 50 at any point in time, as shown in FIG. 11, and multiple tubes 72 may be provided to the user or adjustment location at different weights. Good things are easy to understand.

  FIG. 16 shows an alternative embodiment for placing the tube 72 within the club head 50. In this embodiment, the tube 72 has threaded grooves 84 at both ends 86 and 88, which are the engaging threaded grooves 90 of the block 93 adjacent the face 54 inside the club head, and the skirt 60 of the club head 50. Are mutually coupled by screw engagement with the thread groove 94 of the block 96 adjacent to the block 96. Tube 72 is clamped within club head 50 adjacent to face 54. Note that the orientation of the tube 72 may be set at the time of manufacture, may be changed by the user, or may be modified by the manufacturer or designated adjustment location.

FIG. 17 illustrates the tube 72 of the embodiment of FIG. 16 and shows the double threaded ends 86 and 88 of the tube, which can be inserted into the club head 50 from either direction and attached to the face 54. Adjacent by screwing. The diameter t _d and the length t _l of the tube 72 are as described above, and the weights of the weight 74 and the tube 72 are similar to those described above. The exterior of the tube 72 is aligned to be substantially flush with the outer surface 82 of the club head 50.

  FIG. 18 shows an alternative embodiment of the weight system 70 where the weight 98 can slide along the pipe 100 provided in the club head 50. The outer surface 102 of the sole 56 of the club head 50 moves the weight 98 along the pipe 100 to the desired position, c. g. As a feature, the mechanism 104 is configured to move the motor and realize the desired ball flight as described above. Alternatively, the position of the weight 98 on the pipe 100 may be set during manufacture of the club head.

  FIG. 19 characterizes another alternative embodiment of the weight system 70. This embodiment features two or more cavities 106 in the sole 56 of the club head 50 to accommodate the insert. The cavity 106 may be located at any desired location on the club head 50. As shown, three cavities 106 are provided along an axis O that is offset from the x-axis. The cavity 106 may be aligned parallel to the x-axis or may be offset in either direction. The cavity 106 may be provided along an axis O that is offset from 0 to 90 degrees in either direction from the x-axis. The club head back portion 110 is characterized in that it replaces the tube 72 described above for a surface having a deeper cavity 106 and formed by the z-axis and the x-axis. The plurality of inserts 108 may be of various weights and are disposed in different cavities 106 c. g. Is moved to a desired position. The insert 108 is movable by the user, may be set at the time of manufacture, and may be modified in an adjustment environment.

  FIG. 20 shows yet another alternative embodiment of a weight system 70 for moving the center of gravity along the y-axis. As shown, the club head 50 features a vertical cavity 112 that extends from the sole 56 to the volume 64 of the club head cavity. The cavity 112 may be disposed at any desired position in the sole 56, for example, disposed at the center along the width of the first face 54 and at a position near the back of the club head 50. This is as shown in the figure. The weight 114 is manufactured to fit into the cavity 114 and is securely engaged within the cavity 112. It will be readily appreciated that the weight 114 may be mounted in the cavity in any suitable manner, and that this approach includes screw engagement, epoxy, mechanism locking or other coupling techniques. As shown, the cavity 112 is cylindrical and the weight 114 is a correspondingly cylindrical plug, but the weight 114 and the engagement cavity can be any suitable shape and size, as will be readily appreciated. You may have. The weight 114 has a heavy end 114 and a light end 116 as its features. The weight or light end 116 and 118 close to the sole 56 c. g. May be moved to a desired position along the y-axis. As can be readily understood, the orientation of the weight 114 may be set at the time of manufacture, may be changed by the user, or may be modified at the manufacturer or designated adjustment location. In this embodiment, one attribute is made independent and c. g. Can be easily moved along the y-axis, which makes the club adjustment more direct.

  As shown in FIG. g. This movement is shown according to the structure of FIG. This is because c. g. A normal Titleist 904F fairway wood without a weight system and a club head 50 with the weight system 70 of FIG. 13 with a weight 74 in the back of the club head 50. FIG. 14 shows the club head 50 with the weight system 70 of FIG. 13 having a weight 74 in the front of the club head 50. FIG. 21 shows c. Along the y and z axes for these various club heads. g. Indicates the relative position.

  As shown in FIG. g. This movement is shown according to the structure of FIG. This is because c. g. A normal Titleist 904F fairway wood without a weight system and a club head 50 with the weight system 70 of FIG. 13 with a weight 74 in the back of the club head 50. FIG. 14 shows the club head 50 with the weight system 70 of FIG. 13 having a weight 74 in the front of the club head 50. FIG. 22 shows the c. Along the y and x axes for these various club heads. g. Indicates the relative position.

  As shown in FIG. g. This movement is shown according to the structure of FIG. This is because c. g. A normal Titleist 904F fairway wood without a weight system, and a club head 50 with the weight system 70 of FIG. 16 with a weight 74 in the back of the club head 50. FIG. 17 shows the club head 50 with the weight system 70 of FIG. 16 with a weight 74 in the front of the club head 50. FIG. 21 shows c. Along the y and z axes for these various club heads. g. Indicates the relative position.

  As shown in FIG. g. This movement is shown according to the structure of FIG. This is because c. g. A normal Titleist 904F fairway wood without a weight system and a club head 50 with the weight system 70 of FIG. 16 with a weight 74 in the back of the club head 50. FIG. 17 shows the club head 50 with the weight system 70 of FIG. 16 with a weight 74 in the front of the club head 50. FIG. 24 shows the c. Along the y and x axes for these various club heads. g. Indicates the relative position. C. Shown in FIGS. g. The position of was calculated using a commercially available CAD (Computer Aided Design) system.

As described above, although has been described in a variety of this invention, various features of each embodiment alone, also should be noted that can be employed in combination. Accordingly, the present invention is not limited to the specific preferred embodiments described above. For example, multiple relief surface soles can be combined with a weight system in one club head, c. g. You may make it move. Furthermore, it should be noted that variations and modifications within the spirit and scope of the invention will occur to those skilled in the art. Accordingly, ad hoc modifications that can be readily obtained by one of ordinary skill in the art from the disclosure within the scope and spirit of the invention disclosed herein are to be included as further embodiments of the invention. The scope of the invention is therefore defined as set forth in the appended claims.

It is a perspective view of the Example of the club head of this invention. FIG. 2 is a bottom view of the embodiment of the club head of FIG. 1. It is a front view at the time of the impact with the golf ball of the Example of the club head according to FIG. It is a front view at the time of the address of the Example of the club head according to FIG. FIG. 2 is a bottom view of the embodiment of the club head of FIG. 1. FIG. 5 is a cross-sectional view of the club head of FIG. 4 taken along line 3B-3B of FIG. FIG. 5 is a cross-sectional view of the club head of FIG. 4 taken along line 4C-4C of FIG. FIG. 5 is a cross-sectional view of the club head of FIG. 4 taken along line 4D-4D of FIG. It is a rear view of the club head of FIG. FIG. 2 is a side view of the heel side of the club head of FIG. 1. FIG. 2 is a bottom view of the club head of FIG. 1 having the sole of the present invention. FIG. 7B is a cross-sectional view of the club head of FIG. 7A along line 7B-7B. FIG. 6 is a bottom view of another alternative embodiment of the present invention. FIG. 6 is a plan view of an alternative embodiment of a club head according to the present invention. FIG. 10 is a front view of a club head according to the embodiment of the club head of FIG. 9. FIG. 10B is a cross-sectional view of the club head of FIG. 10A taken along line 10B-10B. FIG. 10 is a plan view of a club head according to the embodiment of FIG. FIG. 10 is a front view of a club head according to the embodiment of the club head of FIG. 9. 12B is a cross-sectional view of the club head of FIG. 12A taken along line 12B-12B. FIG. 10 is a cutaway rear perspective view of the embodiment of the club head according to FIG. 9. FIG. 14 is a rear view of the club head of FIG. 13. FIG. 14 is a perspective view of a weight tube according to the embodiment of FIG. 13. FIG. 10 is a cutaway rear perspective view of another embodiment of the club head according to FIG. 9. FIG. 18 is a perspective view of a weight tube according to the embodiment of FIG. 17. FIG. 10 is a cutaway rear perspective view of another embodiment of the club head according to FIG. 9. FIG. 10 is a bottom view of another embodiment of the club head according to FIG. 9. FIG. 10 is a cutaway front perspective view of another embodiment of the club head according to FIG. 9. 14 is a graph showing the movement of the center of gravity along the y-axis and the z-axis according to the embodiment of FIG. 14 is a graph showing the movement of the center of gravity along the y-axis and the x-axis according to the embodiment of FIG. FIG. 17 is a graph showing the movement of the center of gravity along the y-axis and the z-axis according to the embodiment of FIG. FIG. 17 is a graph showing the movement of the center of gravity along the y-axis and the x-axis according to the embodiment of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Golf club head 12 Main body 14 Hitting face 16 Sole 18 Crown 20 Skirt 22 Hosel 26 Toe 28 Heel 30 Zero degree bounce part 32 Multiple relief surface 34 Negative bounce part 40 Notch part

Claims (11)

A golf club,
A face, a sole, a crown, and a skirt connecting the face, the sole, and the crown; and a body having a heel end and a toe end;
The sole,
(A) a flat portion and a transition portion between the flat portion and the face of the main body, and a first sole portion adjacent to the face of the main body at the transition portion ;
(B) a second sole portion that is provided on the back side of the face apart from the face and is adjacent to the flat portion of the first sole portion directly or through a peripheral portion ;
(C) cutout portions adjacent to the rear side portion of the second sole portion and has a <br/>,
The surface of the flat portion of the first sole portion is parallel to the ground level when the golf club head is addressed, and the surface of the second sole portion extends from the face side to the back side. A golf club head, wherein the golf club head is inclined so as to be upward.
  The golf club head according to claim 1, wherein an angle formed by the ground level and the surface of the second sole portion is 0.5 to 4.0 degrees.   The golf club head according to claim 2, wherein the surface of the second sole portion is a flat surface.   The golf club head according to claim 1, wherein an angle formed by the ground level and the surface of the second sole portion is at least 2.0 degrees.   The golf club head of claim 1, wherein the notch has a depth of 0.05 to 0.5 inches.   The golf club head according to claim 1, wherein the second sole portion is generally triangular.   The golf club head according to claim 1, wherein the second sole portion has a parabolic shape as a whole.   The golf club head of claim 1, wherein the face side tip of the second sole portion is separated from the face of the club head by a distance of 0.154 to 2.54 cm (0.1 to 1.0 inches).   9. A golf club head according to claim 8, wherein the face side tip of the second sole portion is separated from the face of the club head by a distance of 0.85 to 1.65 cm (0.35 to 0.65 inches).   The golf club head according to claim 1, wherein an angle formed by the ground level and a tangent of each point of the second sole portion is constant.   The golf club head according to claim 1, wherein an angle formed by the ground level, a tangent of each point of the second sole portion, and the surface changes as it goes toward the back of the sole.

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