JP2009061264A - Golf club and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To optimize the center of gravity of a golf club head. <P>SOLUTION: A golf club has a shaft and a body 100 coupled to the shaft. The body 100 has a toe end, a heel end located on the side opposite to the toe end, a front end, a back end located on the side opposite to the front, a front face 150 located at the front end, a top wall 160, and a bottom wall 270 located on the side opposite to the top wall 160. The body 100 further has a body height 205 measured in a first direction substantially normal to the bottom wall 270 from the bottom wall 270 to the top point of the front face 150. The body 100 further has a center of gravity 280 and a center of gravity height 285 measured in the first direction along a center of gravity line extended from the bottom wall 270 to the center of gravity 280. The body 100 has a center of gravity ratio, which consists of the center of gravity height 285 to body height 250, and the center of gravity ratio which is less than 0.50. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates generally to golf club heads, and more particularly to a golf club head and a method of manufacturing a golf club head.

  Golf clubs, and specifically golf club heads of various designs, have generally been developed to improve golfer swing functionality and, consequently, golf shots. A common problem that many golfers fall into is the ability to hit the ball, that is, the ability to hit the ball from the front in a regular manner or not consistently. In recent years, golf club designs that optimize the position of the center of gravity of a golf club have become popular among golf club manufacturers in order to eliminate the above-described general problems. By placing the center of gravity towards the bottom of the golf club, this position guides the golfer to hit the ball during the swing, ie hit the ball from the front.

  The manufacture of oversized golf clubs having a relatively large striking face, followed by a relatively large impact area, is another design that has become popular among golf club manufacturers in recent years. These oversized clubs were designed to meet the “mishits” by golfers. Instead of guiding the golfer to hit the ball from the front by optimizing the club's center of gravity position, these oversized clubs have a relatively large sweet spot area to accommodate hitting and hitting the ball. Is used. In this way, as a result of the trajectory of making a mistake and hitting the ball, it reacts as if hitting in front.

  The general trend of golf club manufacturers is to produce irons with an optimized center of gravity and oversized drivers, fairway woods, and utilities. However, golfers, like irons, may benefit from drivers, fairway woods, and utilities where the center of gravity is optimally located, specifically the center of gravity located at the bottom of the club.

  As a result, the center of gravity of these golf club heads can be lowered or further optimized by golf clubs and their manufacturing methods.

  The present specification teaches a golf club head. The golf club head includes a main body. The main body includes a toe end, a heel end opposite to the toe end, a front end, a rear end opposite to the front end, a front face located on the front end, an upper wall, and an opposite side to the upper wall. And a bottom wall located at the bottom. The body has a body height measured from the bottom wall to the top position of the front face in a first direction substantially perpendicular to the bottom wall. The main body has a center of gravity and a center of gravity height measured from the bottom wall to the center of gravity along the center of gravity line in the first direction. The main body has a center-of-gravity ratio composed of the height of the center of gravity relative to the height of the main body. The center of gravity ratio is approximately less than 0.50.

  For the sake of brevity and clarity, the figure represents an overview of the configuration, and details and descriptions of well-known features and techniques have been omitted to avoid unnecessarily obscuring the golf club and its manufacturing method. There are things to do. Further, elements in the drawings are not necessarily drawn with an accurate reduction ratio. For example, the dimensions of some elements in the drawings may be exaggerated relative to other elements to aid in understanding embodiments of the invention. The same reference numerals in different drawings mean the same elements.

  The terms “first”, “second”, “third”, “fourth”, etc. in the description and claims are used to distinguish similar elements, if used, It does not necessarily represent a specific order and time order. Such terms may be substituted according to the appropriate circumstances so that embodiments of the golf club and manufacturing method described herein can be performed in an order other than that shown or described herein. Will be understood. Also, the terms “including”, “including”, “having” and other variations thereof are intended to include, but are not limited to, other ingredients. That is, a process, method, article or device with the listed elements is not necessarily limited to those elements, but other elements not explicitly listed in such processes, methods, articles or devices. Alternatively, other elements that are not unique may be included.

  "Left", "Right", "Front (front)", "Back (back)", "Top (top)", "Bottom (bottom)", "Side (horizontal)", "Bottom" in the description and claims The terms “of”, “above” and the like are used for explanatory purposes, even if they are used, and do not describe universal positional relationships. Such terms are interchangeable as appropriate, so that embodiments of the golf clubs and manufacturing methods described herein can be implemented in a positional relationship other than those shown or described herein. Will be understood. The term “coupled” as used herein is defined as being connected directly or indirectly in electrical, physical, mechanical or other ways.

  In one embodiment of the golf club and method of manufacture described herein, the golf club head includes a toe end, a heel end opposite the toe end, a front end, and a rear end opposite the front end. A main body having a front face located at the front end, an upper wall, and a bottom wall located on the opposite side of the upper wall is provided. The body has a body height measured in a first direction substantially perpendicular to the bottom wall. The body height extends from the bottom wall to the top point of the front face. The body has a center of gravity and a center of gravity height measured in a first direction extending along the center of gravity line. The height of the center of gravity extends from the bottom wall to the center of gravity. The main body also has a center-of-gravity ratio consisting of the center-of-gravity height with respect to the body height, and the center-of-gravity ratio is less than about 0.50.

  In a further embodiment of the golf club and manufacturing method, the golf club head also includes a bottom wall that extends from the front end to the rear end and is substantially parallel to the ground when the club head is in the address position. Yes. The upper wall extends downward so as to intersect the bottom wall at the intersection at the rear end.

  In a further embodiment of the golf club and method of manufacture, the golf club head includes a front face that extends from the top wall to the bottom wall at the front end, the front face being a second substantially parallel to the front face. With maximum face height measured in direction. The face height extends from the top position of the front face to the bottom position of the front face. The front face also has a front face center of gravity position, and a line along a third direction substantially perpendicular to the second direction crosses the front face center of gravity position and the center of gravity of the main body. The front face also has a front face center distance measured along the second direction from the bottom position of the front face to the position of the center of gravity of the front face. In this embodiment, the main body has a front face ratio including a front face center distance with respect to the face height, and the front face ratio is less than 0.6.

  In yet another embodiment of the golf club and method of manufacture, the golf club head includes a toe end, a heel end opposite the toe end, and a front end having a front face extending between the toe end and the heel end. The front face has a top position and a bottom position. This embodiment further includes a rear end located on the opposite side of the front end, and the rear end has an intersection position. In this embodiment, the golf club and manufacturing method includes a bottom wall substantially parallel to the ground when the club head is in the address position, the bottom wall being coupled to the front face at the bottom position, It has the maximum length measured from the bottom position to the intersection position. An upper wall is disposed on the side opposite to the bottom wall, and the upper wall is gradually inclined from the highest point to the intersection. The top wall is connected to the bottom wall at the intersection, and the top wall has a maximum height and a minimum height. The maximum height includes the top position, is measured from the top position to the ground along a first vertical plane substantially perpendicular to the ground, and the minimum height includes the intersection position; Measured from the top point to the ground along a second vertical plane substantially perpendicular to the ground.

  In one embodiment of the golf club and the manufacturing method, the upper wall of the club head extends downward so as to intersect the bottom wall at the intersection of the rear ends. The intersection position includes one end of an intersection distance measured along the first direction from the intersection position to the ground when the club head is located at the address position. This embodiment further comprises an intersection ratio consisting of an intersection distance with respect to the body height, the intersection ratio being less than 0.20.

  In a further embodiment of the golf club and manufacturing method, the intersection of the top wall and the bottom wall at the intersection location forms an intersection angle of less than about 55 degrees, except for the transition radius at the intersection location.

  In one embodiment of a golf club and manufacturing method, a method of manufacturing a golf club head includes a toe end, a heel end, a front end, a rear end, a front face, an upper wall, and a front end to a rear end. And providing a body having a bottom wall adjacent to the top wall at the toe end, the heel end and the rear end. The body has a body height measured along a first direction substantially perpendicular to the bottom wall from the bottom wall to the top position of the front face. The body has a center of gravity and a bottom wall to the center of gravity. It has a center of gravity height measured along the first direction. The main body has a center-of-gravity ratio comprising a center-of-gravity height with respect to the body height, and the center-of-gravity ratio is less than about 0.50.

  In a further embodiment of a golf club and manufacturing method, a method of manufacturing a golf club head includes a bottom extending from the front end to the rear end and substantially parallel to the ground when the club head is in the address position. The method further includes a step of preparing a wall and a step of preparing an upper wall extending downward so as to intersect the bottom wall at the rear end.

  The method of manufacturing a golf club further provides a body having a maximum face height measured from a top position of the front face to a bottom position of the front face along a second direction substantially parallel to the front face. The process of carrying out is further provided. This method includes a front face having a front face center of gravity position, and has a line along a third direction substantially perpendicular to the second direction where the front face center of gravity position and the center of gravity of the main body intersect. . The front face has a front face center distance measured along the second direction from the bottom position of the front face to the front face center of gravity position, and the main body has a front face ratio consisting of the front face center distance to the face height. The front face ratio is less than 0.6.

  In a further embodiment of the golf club and manufacturing method, the manufacturing method includes providing a golf club head having a radius of curvature at the center of the top wall that is less than the radius of curvature at the center of the bottom wall. The method further includes a step of defining a center of gravity located below the front face center of gravity position. Furthermore, this method can also define a center of gravity height that is smaller than the front face center distance.

  In a further embodiment of the golf club and method of manufacturing, a method of manufacturing a golf club head comprises the step of providing a top wall extending downwardly to intersect the bottom wall at the intersection of the rear ends. The intersection position further includes one end of an intersection distance measured along the first direction from the intersection position to the ground when the club head is located at the address position. In this embodiment, the body has an intersection ratio consisting of an intersection distance with respect to the body height, and the intersection ratio is less than 0.20.

  In one embodiment of a golf club and manufacturing method, a method of manufacturing a golf club head includes a top wall and a bottom at an intersection location to form an intersection angle of less than about 55 degrees, except for a transition radius at the intersection location. The method further includes providing an intersection with the wall.

  In some embodiments, the golf club head comprises a planar, concave or convex top wall, and the method of manufacturing provides a golf club head comprising a planar, concave or convex top wall. It includes a process.

  These above-described embodiments can be used to optimize the center of gravity by lowering the center of gravity of the golf club head, or using less material or reducing the mass of the outer shell of the golf club head. It may be possible to redistribute the remaining mass to other parts of the golf club head.

  In the drawings, FIG. 1 is a perspective view of a golf club 101, which is located at a shaft 190, a toe end 110, a heel end 120 located on the opposite side of the toe end 110, and a heel end 120. The hosel 105, the front end 130, the rear end 140 located on the opposite side of the front end 130, the front face 150 located on the front end 130, the upper wall 160, and the bottom wall 270 located on the opposite side of the upper wall 160 ( 2). A golf club head body 100 having FIG. The front face 150 may include a striking face and one or more grooves 152. The grooves 152 may be incorporated into the front face 150 in various patterns, depths, widths, lengths, cross-sectional shapes and / or the like. Further, the golf club 101 may be a driver, wood, hybrid club, or other suitable type of golf club. The devices, methods, and products described herein are not limited in this respect.

  Referring to FIG. 2, when the golf club head body 100 is in the address position, the body 100 has a maximum body height 205 measured along a first direction substantially perpendicular to the bottom wall 270 and / or the ground. have. The main body height 205 extends from the bottom wall 270 to the uppermost position 206 of the front face 150. For example, the uppermost position 206 of the front face 150 is the position of the main body 100 farthest from the bottom wall 270 in the first direction. The main body 100 further has a center of gravity 280 and a center of gravity height 285. The center of the center of gravity height 285 is measured along the center of gravity line from the bottom wall 270 to the center of gravity 280 in the first direction.

  In one embodiment, referring to Table 1, the main body 100 has a center-of-gravity ratio of a center-of-gravity height 285 with respect to the body height 205, and the center-of-gravity ratio is less than 0.50. In other embodiments, the centroid ratio is less than about 0.389. In the above embodiments, the centroid ratio is described with a specific value, but the devices, methods, and products described herein may be associated with other centroid ratios. Specifically, the barycentric ratio may change linearly or non-linearly with respect to the loft angle. That is, the golf club head having a loft angle larger than 21.5 degrees may have a gravity center ratio of 0.50 or more. Similarly, a golf club head having a loft angle smaller than 14.0 degrees may have a gravity center ratio of 0.393 or more. Further, in Table 1, specific gravity center height, body height, face height, front face center height, gravity center ratio and front face ratio of the golf club head are described in relation to a specific loft angle. However, the devices, methods, and products described herein may be applied to other golf club heads associated with other loft angles.

  In a further location embodiment, the front face 150 extends from the top wall 160 to the bottom wall 270 at the front end 130 and has a maximum face height 255. The face height 255 is measured from a top position 206 of the front face 150 to a bottom position 208 of the front face 150 in a second direction substantially parallel to the front face 150. The front face 150 has a front face center of gravity position 283. The face height 255 may extend along the center line of the front face 150, and the center line bisects the front face 150. A line along a third direction substantially perpendicular to the second direction crosses the front face centroid position 283 and the centroid 280 of the body. The front face 150 has a front face center distance 258 measured from the bottom position 208 of the front face 150 to the front face gravity center position 283 in the second direction. The main body 100 further includes a front face ratio including a front face center distance 258 with respect to the face height 255, and the front face ratio is less than about 0.6. In other embodiments, the front face ratio is less than 0.575.

  In one embodiment, the center of gravity height 285 is less than approximately 16 mm. In other embodiments, the center of gravity height 285 is less than 12.7 mm.

  In the embodiment of FIG. 3, the bottom wall 270 extends from the front end 130 to the rear end 140 and is substantially parallel to the ground 398 when the club head 100 is in the address position. The upper wall 160 intersects the bottom wall 270 at the intersection position 390 of the rear end 140.

  In other embodiments, as seen in FIGS. 3 and 12, the radius of curvature of the central portion of the top wall 160 is smaller than the radius of curvature of the central portion of the bottom wall 270. In other embodiments, as shown in FIG. 13, the top wall 1360 has no radius of curvature. In yet another embodiment, as shown in FIG. 14, the upper wall 1460 is convex.

  In a further embodiment, the top wall 160 extends downwardly to intersect the bottom wall 270 at the intersection location 390 of the rear end 140. The intersection position 390 has one end of an intersection distance 395 measured in the first direction from the intersection position 390 to the ground 398 when the club head 100 is in the address position. Referring to Table 2, the main body 100 has an intersection ratio including an intersection distance 395 with respect to the body height 205, and the intersection ratio is 0.20 or less. In one embodiment, the intersection ratio is approximately 0.136 or less.

  Alternatively, the portion of the bottom wall 270 that extends from the front face 150 at the front end 130 to the intersection position 390 at the rear end 140 may be substantially parallel to the ground 398 when the club head is in the address position.

  In a further embodiment of the golf club and manufacturing method, referring to FIG. 4, the intersection of the top wall 160 and the bottom wall 270 at the intersection location 390 is less than about 55 degrees, except for the transition radius at the intersection location 390. The intersection angle 492 is formed.

  5 to 12 show other views of the golf club head main body 100. FIG. Some of the embodiments described herein may be described in different ratios. These ratios should not be construed to limit the embodiments described herein, but are merely included to enable various embodiments. Ratios are included to help explain the relationship between various club elements such as body height 205, face height 255, position of center of gravity 280, intersection 390, and the like.

  In one embodiment of the golf club and method of manufacture, referring to FIG. 12, the golf club head 100 includes a front face 150 having a top position 206 and a bottom position 208 and a rear end 140 located opposite the front end 130. The rear end 140 has an intersection position 390. In this embodiment, when the golf club head 100 is in the address position, the bottom wall 270 is substantially parallel to the ground 398 and the bottom wall 270 is connected to the front face 150 at the bottom position 208. Body 100 and / or bottom wall 270 has a maximum length 1272 measured from bottom position 208 to intersection position 390. The top wall 160 located on the opposite side of the bottom wall 270 is continuously inclined in a substantially concave shape when viewed from the ground 398 from the top position 206 to the intersection position 390, and the top wall 160 is at the intersection position 390. The bottom wall 270 is connected. In this embodiment, the top wall 160 has a maximum body height 205 and a minimum intersection height 395 that is substantially perpendicular to the ground 398 and includes a first position 206. A measurement is performed from the uppermost position 206 to the ground surface 398 along the first vertical plane 1261. That is, the maximum height of the main body 100 is located at the junction (ie, the uppermost position 206) of the upper wall 160 and the front face 150. The minimum intersection height 395 is substantially perpendicular to the ground surface 398 and substantially parallel to the first vertical plane 1261 and the first direction described above, along the second vertical plane 1262 including the intersection position 390. , Measured from the intersection position 390 to the ground 398.

  In another embodiment of a golf club and manufacturing method, referring to FIG. 13, a golf club head body 1300 is similar to the golf club head body 100 of FIGS. 1-12 except as described below. The golf club head main body 1300 includes an upper wall 1360 that is continuously inclined linearly from the uppermost position 1306 to the intersection position 1390. The top position 1306 defines a maximum top wall height and / or a maximum body height 1305 of the golf club head body 1300, and the first position substantially perpendicular to the ground 398 when the body 1300 is in the address position. Measured along the vertical plane 1361. Surface 1361 includes a top position 1306. The intersection 1390 defines a minimum top wall height and / or a minimum body height or minimum intersection height 1395 of the golf club head body 1300 that is substantially relative to the ground 398 when the body 1300 is in the address position. Measured along a vertical second vertical plane 1362. Surface 1362 includes an intersection 1390. Golf club head body 1300 also has a maximum bottom wall length and / or maximum body length 1372 measured from bottom point 208 to intersection 1390. Maximum body height 1305, top point 1306, first vertical surface 1361, intersection 1390, minimum intersection height 1395, second vertical surface 1362 and maximum body length 1372 are respectively the maximum body height 205 (FIG. 2), Top point 206 (FIG. 2), first vertical surface 1261 (FIG. 12), intersection 390 (FIG. 3), minimum intersection height 395, second vertical surface 1262 (FIG. 12) and maximum body length 1272 (FIG. 12) It is the same.

  Further, in another embodiment of the golf club and manufacturing method, referring to FIG. 14, the golf club head body 1400 is similar to the golf club head body 100 of FIGS. 1 to 12 except as described below. . The golf club head body 1400 includes an upper wall 1460 that is continuously inclined from the uppermost point 1406 to the intersection 1490 in a substantially convex shape with respect to the ground 398. The top point 1406 defines a maximum top wall height and / or a maximum body height 1405 of the golf club head body 1400, and the first point substantially perpendicular to the ground 398 when the body 1400 is in the address position. Measured along the vertical plane 1461. Surface 1461 includes a top point 1406. The intersection 1490 defines a minimum top wall height and / or a minimum body height or minimum intersection height 1495 of the golf club head body 1400, substantially with the ground 398 when the body 1400 is in the address position. Measured along a vertical second vertical plane 1462. Surface 1462 includes an intersection 1490. Golf club head body 1400 also has a maximum bottom wall length and / or maximum body length 1472 measured from bottom point 208 to intersection 1490. Maximum body height 1405, top point 1406, first vertical surface 1461, intersection 1490, minimum intersection height 1495, second vertical surface 1462 and maximum body length 1472 are respectively the maximum body height 205 (FIG. 2), Top point 206 (FIG. 2), first vertical surface 1261 (FIG. 12), intersection 390 (FIG. 3), minimum intersection height 395, second vertical surface 1262 (FIG. 12) and maximum body length 1272 (FIG. 12) It is the same.

  While the embodiments described herein generally comprise a hollow body, in other embodiments of golf clubs and manufacturing methods, the interior of the body 100 is otherwise a substantially hollow interior. You may have various other elements to fill. For example, the main body 100 may include a foaming material or other filler for changing the acoustic characteristics of the club head when a ball is hit with the club head. Further, an internal element may be added to change the physical characteristics of the club head, and the physical characteristics include weight, center of gravity, moment of inertia, coefficient of restitution, and the like. As other internal elements, a reinforcing rib member, a cross member, or the like may be added for reinforcement.

  In one embodiment of the golf club and manufacturing method, the golf club head manufacturing method includes toe end 110, heel end 120, front end 130, rear end 140, front face 150, upper wall 160, and front end 130 to rear end 140. And providing a body 100 having a bottom wall 270 that extends and is adjacent to the top wall 160 at the toe end 110, the heel end 120, and the rear end 140. The main body 100 has a main body height 205, a center of gravity 280, and a center of gravity height 285. The main body 100 has a center-of-gravity ratio of a center-of-gravity height 285 with respect to the body height 205, and the center-of-gravity ratio is less than about 0.50.

  The method can also include manufacturing a golf club by preparing the shaft 190, preparing the body 100, and connecting the shaft 190 and the body 100. In the example of FIG. 15, the process or method 1500 may begin with the steps of forming the golf club head body 100 (block 1510) and connecting the golf club head body 100 to the golf club shaft 190 (block 1520). Good.

  In another embodiment of the golf club and method of manufacture, referring to FIG. 16, the method 1600 includes providing a golf club head having a front face opening (block 1610) and providing a front face (block 1620). And a step of connecting the front face to the golf club head (block 1630). In this example, the method 1600 further comprises connecting the golf club head to the golf club shaft (block 1640). In one example, the golf club head and front face are assembled together to be similar to the golf club head body 100 of FIGS. 1-12, the golf club head body 1300 of FIG. 13, and the golf club head body 1400 of FIG. Also good.

  In another further embodiment of the golf club and method of manufacture, referring to FIG. 17, the method 1700 includes providing a top wall (Block 1710) and preparing a bottom wall 270 (Block 1720). ing. In one embodiment, the top wall of block 1710 is convex (similar to top wall 160 in FIG. 12), straight (similar to top wall 1360 in FIG. 13), or concave (similar to top wall 1460 in FIG. 14). There may be. The bottom wall 270 may be substantially parallel to the ground when the main body 100 is in an address position relative to a golf ball (not shown). In this embodiment, the method 1700 includes a step of preparing the front face 150 (block 1730) and a suitable top wall, bottom wall 270 and front face 150, such as welding, to define a golf club head body. A step of connecting by a method (block 1740) may be further provided. The golf club head body of block 1740 may be similar to the golf club head body 100 of FIGS. 1-12, the golf club head body 1300 of FIG. 13, and the golf club head body 1400 of FIG. Finally, in this example, method 1700 includes coupling the golf club head body to shaft 190 (block 1750).

  In FIG. 15 to FIG. 17, the steps are described in a specific order, but these steps may be executed in other time series. For example, two or more steps shown in FIGS. 15 to 17 may be performed in succession, simultaneously, or simultaneously.

  The preparation steps in the method described in FIGS. 15 to 17 may include a design process and / or a manufacturing process. The design process and manufacturing process of the golf club shaft are well known in the art, and the technically well known design process and manufacturing process techniques are used in the design and manufacture of the golf club head body shown in FIGS. be able to. In one example, the body 100 of FIG. 15 can be manufactured using a metal casting process. Further, the described method can be used to produce other appearances of the main body 100 described with reference to FIGS. 1 to 12, the outer appearance of the main body 1300 of FIG. 13, and the outer appearance of the main body 1400 of FIG. Can do.

  Additional examples of such variations have been described above. Accordingly, the disclosure of the embodiment relating to the golf club and the manufacturing method is intended to illustrate the scope of rights related to the golf club and the manufacturing method, and is not intended to be limited. For example, in one embodiment, a golf club head has one or more of the features of FIG. 2 and may have the features described with reference to FIG. 3 or FIG. May be. Similarly, in different embodiments, the golf club head has one or more of the features of FIG. 3 and may or may not have the features of FIG. 2 or FIG. The club head has one or more of the features of FIG. 4 and may or may not have the features of FIG. 2 or FIG. It is intended that the scope of rights relating to golf clubs and manufacturing methods be limited only to those claimed in the appended claims.

  The system discussed here may be implemented in various embodiments. The above discussion of some of these embodiments does not fully describe all possible embodiments. Rather, the detailed description of the drawings, and the drawings themselves, disclose at least one preferred embodiment of a golf club and manufacturing method, and may disclose alternative embodiments of a golf club and manufacturing method.

  All elements claimed in any particular claim are essential to the golf club or method of manufacture claimed in that particular claim. Thus, the replacement of one or more claimed elements is a reconstruction and not a repair. In addition, benefits, other utilities, and solutions to problems have been described with regard to specific embodiments. However, any element that may or may more clearly define their benefit, utility, method of solving the problem and solution of those benefits, utility, and problem of any or all claims, Should not be construed as essential, necessary or essential.

  Also, the embodiments and limitations described above are (1) not explicitly stated in the claims, and / or (2) elements and / or limitations and potentials expressed in the claims under an equivalent principle. The embodiments and limitations are not subject to public use under the principle of contribution.

1 is a perspective view of a golf club showing a front face and an upper wall of a golf club head of the golf club with respect to the first embodiment. FIG. FIG. 3 shows a side view of a golf club head showing the center of gravity of the golf club head and various dimensional elements for the first embodiment. FIG. 2 shows a cross-sectional view of a golf club head showing various dimensional elements for the first embodiment. FIG. 3 shows a side view of the rear end of a golf club showing the crossing position, crossing angle, and crossing height for the first example. FIG. 3 shows a perspective view of a golf club head showing the bottom wall for the first embodiment. 1 shows a front view of a golf club head showing a front end and a front face with respect to the first embodiment. FIG. FIG. 3 shows a rear view of a golf club head showing the rear end with respect to the first embodiment. FIG. 3 shows a top view of a golf club head showing the top wall, front end, rear end, heel end, and toe end for the first embodiment. FIG. 3 shows a bottom view of a golf club head showing a bottom wall for the first embodiment. FIG. 3 shows a side view of a golf club head showing a heel portion with respect to the first embodiment. FIG. 3 shows a side view of a golf club head showing a toe portion with respect to the first embodiment. FIG. 12 shows a cross-sectional view of the example golf club head of FIG. 11 located at the address position. FIG. 6 shows a cross-sectional view of an example golf club head located at an address location with respect to a second embodiment. FIG. 6 shows a cross-sectional view of an example golf club head located at an address location with respect to a third embodiment. FIG. 6 shows a flow diagram of one method by which a golf club head can be manufactured with respect to a fourth embodiment. FIG. 6 shows a flow diagram of one method by which a golf club head can be manufactured with respect to a fifth embodiment. FIG. 8 shows a flow diagram of another method with which the golf club head of FIG. 1 can be manufactured with respect to the sixth embodiment.

Claims (39)

A toe end, a heel end positioned on the opposite side of the toe end, a front end, a rear end positioned on the opposite side of the front end, a front face positioned on the front end, an upper wall, and a bottom wall positioned on the opposite side of the upper wall A body having
With
The body has a body height measured in a first direction substantially perpendicular to the bottom wall from the bottom wall to an uppermost position of the front face;
The main body has a center of gravity and a center of gravity height measured from the bottom wall to the center of gravity along the center of gravity line in the first direction;
The main body has a center-of-gravity ratio composed of the height of the center of gravity with respect to the height of the main body,
A golf club head whose center-of-gravity ratio is less than approximately 0.50.   The golf club head of claim 1, wherein the center of gravity ratio is less than approximately 0.389. The bottom wall extends from the front end to the rear end and is substantially parallel to the ground when the club head is in the address position;
The golf club head according to claim 1, wherein the upper wall extends downward so as to intersect the bottom wall at the rear end. The front face extends from the top wall to the bottom wall at the front end, and is measured from a top position of the front face to a bottom position of the front face in a second direction substantially parallel to the front face. Has the maximum face height to be
The front face has a front face center of gravity position;
A line along a third direction substantially perpendicular to the second direction crosses the front face center of gravity position and the center of gravity of the body;
The front face has a front face center distance measured in the second direction from the bottom position of the front face to the front face gravity center position;
The main body further includes a front face ratio composed of a center distance of the front face with respect to the face height,
The golf club head of claim 1, wherein the front face ratio is less than approximately 0.6. The golf club head of claim 1, wherein the front face ratio is less than approximately 0.575. The golf club head of claim 1, wherein the body is substantially hollow. The golf club head according to claim 1, wherein a radius of curvature of a central portion of the upper wall is smaller than a radius of curvature of a central portion of the bottom wall. The golf club head according to claim 1, wherein the height of the center of gravity is less than about 16 mm. The golf club head according to claim 1, wherein the height of the center of gravity is less than approximately 12.7 mm. The upper wall extends downward to intersect the bottom wall at the intersection of the rear ends,
The intersection position further comprises one end of an intersection distance measured in the first direction from the intersection position to the ground when the club head is at the address position;
The body has an intersection ratio comprising the intersection distance to the body height;
The golf club head of claim 1, wherein the intersection ratio is less than approximately 0.20. The golf club head of claim 1, wherein the intersection ratio is less than approximately 0.136. 11. The golf club head according to claim 10, wherein the intersection between the top wall and the bottom wall at the intersection position forms an intersection angle of less than about 55 degrees when a change radius at the intersection position is excluded. The front face extends from the top wall to the bottom wall at the front end, and is measured from a top position of the front face to a bottom position of the front face in a second direction substantially parallel to the front face. Has the maximum face height to be
The front face has a front face center of gravity position;
A line along a third direction substantially perpendicular to the second direction crosses the front face center of gravity position and the center of gravity of the body;
The front face has a front face center distance measured in a second direction from the bottom position of the front face to the front face center of gravity position,
The main body further includes a front face ratio composed of a center distance of the front face with respect to the face height,
Its front face ratio is less than about 0.6,
The golf club head according to claim 1, wherein the height of the center of gravity is less than about 16 mm. The front face extends from the top wall to the bottom wall at the front end, and is measured from a top position of the front face to a bottom position of the front face in a second direction substantially parallel to the front face. Has the maximum face height to be
The front face has a front face center of gravity position;
A line along a third direction substantially perpendicular to the second direction crosses the front face center of gravity position and the center of gravity of the body;
The front face has a front face center distance measured in a second direction from the bottom position of the front face to the front face center of gravity position,
The main body further includes a front face ratio composed of a center distance of the front face with respect to the face height,
The front face ratio is less than approximately 0.6;
The upper wall extends downward to intersect the bottom wall at the intersection of the rear ends,
The intersection position further comprises one end of an intersection distance measured in the first direction from the intersection position to the ground when the club head is at the address position;
The body has an intersection ratio comprising the intersection distance to the body height;
The golf club head of claim 1, wherein the intersection ratio is less than approximately 0.20. The front face extends from the top wall to the bottom wall at the front end, and is measured from a top position of the front face to a bottom position of the front face in a second direction substantially parallel to the front face. Has the maximum face height to be
The front face has a front face center of gravity position;
A line along a third direction substantially perpendicular to the second direction crosses the front face center of gravity position and the center of gravity of the body;
The front face has a front face center distance measured in the second direction from the bottom position of the front face to the front face gravity center position;
The main body has a front face ratio composed of a center distance of the front face with respect to the face height,
Its front face ratio is less than about 0.6,
The top wall and the bottom wall intersect at an intersection position of the rear end. At the intersection position, an intersection angle is formed except for a change radius at the intersection position, and the intersection angle is less than about 55 degrees. The golf club head according to claim 1. The center of gravity height is less than about 16 mm;
The upper wall extends downward to intersect the bottom wall at the intersection of the rear ends,
The intersection position further comprises one end of an intersection distance measured in the first direction from the intersection position to the ground when the club head is at the address position;
The body has an intersection ratio comprising the intersection distance to the body height;
The golf club head of claim 1, wherein the intersection ratio is less than approximately 0.20. The center of gravity height is less than about 16 mm;
The top wall and the bottom wall intersect at an intersection position of the rear end. At the intersection position, an intersection angle is formed except for a change radius at the intersection position, and the intersection angle is less than about 55 degrees. The golf club head according to claim 1. The upper wall extends downward to intersect the bottom wall at the intersection of the rear ends,
The intersection position further comprises one end of an intersection distance measured in the first direction from the intersection position to the ground when the club head is at the address position;
The body has an intersection ratio comprising the intersection distance to the body height;
The intersection ratio is less than about 0.20,
The upper wall and the bottom wall intersect at an intersection position of the rear end. At the intersection position, an intersection angle is formed except for a change radius at the intersection position, and the intersection angle is less than about 55 degrees. The golf club head according to claim 1. The center of gravity height is less than about 16 mm;
The upper wall extends downward to intersect the bottom wall at the intersection of the rear ends,
The intersection position further comprises one end of an intersection distance measured in the first direction from the intersection position to the ground when the club head is at the address position;
The body has an intersection ratio comprising the intersection distance to the body height;
The intersection ratio is less than about 0.20,
The top wall and the bottom wall intersect at an intersection position of the rear end. At the intersection position, an intersection angle is formed except for a change radius at the intersection position, and the intersection angle is less than about 55 degrees. The golf club head according to claim 1. The front face extends from the top wall to the bottom wall at the front end, and is measured from a top position of the front face to a bottom position of the front face in a second direction substantially parallel to the front face. Has the maximum face height to be
The front face has a front face center of gravity position;
A line along a third direction substantially perpendicular to the second direction crosses the front face center of gravity position and the center of gravity of the body;
The front face has a front face center distance measured in a second direction from the bottom position of the front face to the front face center of gravity position,
The main body includes a front face ratio composed of a center distance of the front face with respect to the face height,
Its front face ratio is less than about 0.6,
The upper wall extends downward to intersect the bottom wall at the intersection of the rear ends,
The intersection position further comprises one end of an intersection distance measured in the first direction from the intersection position to the ground when the club head is at the address position;
The body has an intersection ratio comprising the intersection distance to the body height;
The intersection ratio is less than about 0.20,
The upper wall and the bottom wall intersect at an intersection position of the rear end. At the intersection position, an intersection angle is formed except for a change radius at the intersection position, and the intersection angle is less than about 55 degrees. The golf club head according to claim 1. A toe end, a heel end located opposite to the toe end, a front end, a rear end located opposite to the front end, a front face located on the front end, an upper wall, and a bottom wall located opposite to the upper wall And a main body having
The body has a center of gravity;
The front face extends from the top wall to the bottom wall at the front end and measures from a top position of the front face to a bottom position of the front face in a first direction substantially parallel to the front face. Has the maximum face height to be
The front face has a front face center of gravity position;
A line along a second direction substantially perpendicular to the first direction crosses the front face center of gravity position and the center of gravity of the body;
The front face has a front face center distance measured in a first direction from the bottom position of the front face to the front face center of gravity position;
The main body further includes a front face ratio including a center distance of the front face with respect to the face height,
A golf club head whose front face ratio is less than about 0.6. A toe end, a heel end positioned on the opposite side of the toe end, a front end, a rear end positioned on the opposite side of the front end, a front face positioned on the front end, an upper wall, and a bottom wall positioned on the opposite side of the upper wall A main body having
The body has a body height measured in a first direction substantially perpendicular to the bottom wall from the bottom wall to an uppermost position of the front face;
The upper wall extends downward to intersect the bottom wall at the intersection of the rear ends,
The intersection position further comprises one end of an intersection distance measured in the first direction from the intersection position to the ground when the club head is at the address position;
The body has an intersection ratio comprising the intersection distance to the body height;
A golf club head whose cross ratio is less than approximately 0.20. A method of manufacturing a golf club head comprising:
A body having a toe end, a heel end, a front end, a rear end, a front face, an upper wall, its upper wall, a front wall extending from the front end to the rear end, and a bottom wall adjacent to the upper wall at the toe end, the heel end and the rear end. The preparation process,
With
The body has a body height measured in a first direction substantially perpendicular to the bottom wall from the bottom wall to an uppermost position of the front face;
The body has a center of gravity and a center of gravity height measured in a first direction from the bottom wall to the center of gravity;
The main body has a center-of-gravity ratio composed of the height of the center of gravity with respect to the height of the main body,
A method for manufacturing a golf club head, wherein the center-of-gravity ratio is less than about 0.50. Providing the bottom wall extending from the front end to the rear end and substantially parallel to the ground when the club head is in the address position;
Preparing an upper wall extending downward to intersect the bottom wall at the rear end;
The method of manufacturing a golf club head according to claim 23, further comprising: Providing the body having a maximum face height measured in a second direction substantially parallel to the front face from a top position of the front face to a bottom position of the front face;
Further comprising
The front face has a front face center of gravity position;
A line along a third direction substantially perpendicular to the second direction crosses the front face center of gravity position and the center of gravity of the body;
The front face has a front face center distance measured in the second direction from the bottom position of the front face to the front face gravity center position;
The main body further includes a front face ratio consisting of the front face center distance with respect to the face height,
The method of manufacturing a golf club head according to claim 23, wherein the front face ratio is less than about 0.6. 24. The method of manufacturing a golf club head according to claim 23, wherein a curvature radius of a central portion of the upper wall is smaller than a curvature radius of a central portion of the bottom wall. 24. The method of manufacturing a golf club head according to claim 23, further comprising a step of defining the center of gravity below the front face center of gravity position. 24. The method of manufacturing a golf club head according to claim 23, further comprising a step of defining the height of the center of gravity less than the front face center distance. A step of preparing an upper wall extending downward so as to intersect with the bottom wall at the intersection position of the rear end,
The intersection position further comprises one end of an intersection distance measured in the first direction from the intersection position to the ground when the club head is at the address position;
The body has an intersection ratio comprising the intersection distance to the body height;
The method of manufacturing a golf club head according to claim 23, wherein the crossing ratio is less than about 0.20. 30. The method of manufacturing a golf club head according to claim 29, wherein the intersection between the top wall and the bottom wall at the intersection position forms an intersection angle of less than about 55 degrees when the change radius at the intersection position is excluded. A shaft,
The toe end, the heel end located on the opposite side of the toe end, the front end, the rear end located opposite to the front end, the front face located on the front end, the upper wall and the Comprising a body having a bottom wall located opposite the wall;
The body has a body height measured in a first direction substantially perpendicular to the bottom wall from the bottom wall to an uppermost position of the front face;
The body has a center of gravity and a center of gravity height measured in a first direction along the center of gravity line from the bottom wall to the center of gravity;
The main body has a center-of-gravity ratio composed of the height of the center of gravity with respect to the height of the main body,
The golf club whose center-of-gravity ratio is less than about 0.50. The front face extends from the top wall to the bottom wall at the front end, and is measured from a top position of the front face to a bottom position of the front face in a second direction substantially parallel to the front face. Has the maximum face height to be
The front face has a front face center of gravity position;
A line along a third direction substantially perpendicular to the second direction crosses the front face center of gravity position and the center of gravity of the body;
The front face has a front face center distance measured in the second direction from the bottom position of the front face to the front face gravity center position;
The main body has a front face ratio composed of a center distance of the front face with respect to the face height,
32. A golf club according to claim 31, wherein the front face ratio is less than about 0.6. The upper wall extends downward to intersect the bottom wall at the intersection of the rear ends,
The intersection position further comprises one end of an intersection distance measured in the first direction from the intersection position to the ground when the club head is at the address position;
The body has an intersection ratio comprising the intersection distance to the body height;
32. A golf club according to claim 31, wherein the intersection ratio is less than about 0.20. 32. The golf club according to claim 31, wherein the intersection between the top wall and the bottom wall at the intersection position forms an intersection angle of less than about 55 degrees when a change radius at the intersection position is excluded. The front face extends from the top wall to the bottom wall at the front end, and is measured from a top position of the front face to a bottom position of the front face in a second direction substantially parallel to the front face. Has the maximum face height to be
The front face has a front face center of gravity position;
A line along a third direction substantially perpendicular to the second direction crosses the front face center of gravity position and the center of gravity of the body;
The front face has a front face center distance measured in the second direction from the bottom position of the front face to the front face gravity center position;
The main body has a front face ratio composed of a center distance of the front face with respect to the face height,
Its front face ratio is less than about 0.575,
The upper wall extends downward to intersect the bottom wall at the intersection of the rear ends,
The intersection position comprises one end of an intersection distance measured in the first direction from the intersection position to the ground when the club head is in the address position;
The body has an intersection ratio comprising the intersection distance to the body height;
The intersection ratio is less than approximately 0.136,
32. The golf club according to claim 31, wherein the intersection between the top wall and the bottom wall at the intersection position forms an intersection angle of less than about 55 degrees when a change radius at the intersection position is excluded. A golf club head,
Toe end,
A heel end opposite the toe end,
A front end having a front face extending between the toe end and the heel end and having a first position and a second position;
A rear end located on the opposite side of the front end and having a third position;
A bottom wall that is substantially parallel to the ground and connected to the front face in the second position when the golf club head is in the address position;
An upper wall located on the opposite side of the bottom wall and continuously inclined from the first position to the third position;
With
The upper wall is connected to the bottom wall in the third position;
The upper wall has a maximum height and a minimum height;
The maximum height is measured from the first position to the ground along a first vertical plane substantially perpendicular to the ground including the first position;
The golf club head, wherein the minimum height is measured from the third position to the ground along a second vertical plane that is substantially perpendicular to the ground including the third position. 37. A golf club head according to claim 36, wherein the upper wall comprises at least one of a substantially straight wall, a concave wall with respect to the ground, or a convex wall with respect to the ground. . 37. A golf club head according to claim 36, wherein the bottom wall has a maximum length measured from the second position to the third position. 39. A golf club head according to claim 38, wherein the golf club head has the maximum length.

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