JP2017153954A - Golf club head with structural column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head having multiple structural columns.SOLUTION: A body comprises a face section, a sole section, and a crown or return section, and defines a hollow interior. Each of the structural columns extends from the crown or return section to the sole section within the hollow interior to reduce stresses placed on the face section during impact on a golf ball. The structural columns are all located within 1 inch from a rear surface of the face section measured along a plane normal to the center of the face, and are spaced by a distance of 0.500 to 2.00 inches within the hollow interior.SELECTED DRAWING: Figure 3

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part of US patent application Ser. No. 15 / 385,549, filed Dec. 20, 2016, which is filed on Feb. 23, 2016. US patent application Ser. No. 15 / 051,361, filed Jan. 15, 2016, which is a continuation-in-part of US patent application Ser. No. 14 / 997,199 filed Jan. 15, 2016. This is a continuation-in-part of the specification, which is a continuation-in-part of U.S. Patent Application No. 14 / 788,326, filed June 30, 2015, and in July 2015. This is a continuation-in-part of U.S. Patent Application No. 14 / 794,578, filed on the 8th, which is a continuation-in-part of U.S. Patent Application No. 14/755, filed June 30, 2015. Partial succession of 068 specification This is a continuation application, and this continuation application is filed on September 26, 2014, and has been patented on February 16, 2016 as US Patent No. 9,259,627. , 843, which is a continuation-in-part application, which was filed on February 5, 2014 and patented as US Pat. No. 9,180,349 on November 10, 2015. No. 14 / 173,615, which was filed on Sep. 27, 2013 and U.S. Pat. No. 8,834 on Sep. 16, 2014. , 294, a continuation-in-part of U.S. Patent Application No. 14 / 039,102, which was filed on March 12, 2013 and is now abandoned , US patent application No. 3 / 797,404, which is a continuation-in-part of the US Provisional Patent Application Nos. 61 / 665,203 and August 2012 filed on June 27, 2012. Claimed priority of US Provisional Patent Application No. 61 / 684,079, filed on the 16th, the disclosure of each of these continuation applications is hereby incorporated by reference in its entirety. U.S. Patent Application No. 14,997,199 is also filed on Feb. 13, 2015 and granted as U.S. Patent No. 9,345,936 on May 24, 2016. No. 14 / 622,606, which is a continuation-in-part application filed on May 31, 2013, and on February 17, 2015, U.S. Pat. No. 8,956,244. US patent application Ser. No. 13 / 906,572, patented in its entirety, the disclosure of each of these applications is hereby incorporated by reference in its entirety.
Federally funded research and development statement N / A

  The present invention relates to a golf club head. More particularly, the present invention relates to a golf club head having a stress reducing feature disposed in the vicinity of a striking face portion with a crown portion coupled to a sole portion via a hollow interior.

  The prior art discloses various golf club heads having an internal structure. For example, U.S. Pat. No. 6,299,547 entitled “Golf Club Head with an Internal Strike Plate Brace” by Kosmatka discloses a golf club head having braces that limit the deflection of the striking plate, and Yabu ’s “Golf Club Head Ad”. US Pat. No. 6,852,038 entitled “Method of Making The Same” discloses a golf club head having a sound bar, and US Pat. No. 7,118,493 entitled “Multiple Material Golf Club Head” of Gallaway is a metal face. A golf club having a composite at the rear of the body having an internal sound component extending upward from the sole portion of the component US Pat. No. 8834294, which discloses a love head and is entitled “Golf Club Head With Gravity Adjustability” by Seluga et al., Describes a golf club head having a tube with a mass for adjusting the CG of the golf club head. U.S. Pat. No. 8900070, disclosed and entitled "Weighted Golf Club Head" by Dawson et al., Discloses a golf club head having an internal way trip extending from the sole to the face. However, the prior art does not disclose an internal structure that increases the ball speed by reducing stress in the striking face portion during a collision while minimizing an increase in the mass of the golf club head.

US Pat. No. 6,299,547 US Pat. No. 6,852,038 US Pat. No. 7,118,493 U.S. Pat. No. 8834294 US Patent No. 8900070

  A golf club head includes an internal structure that couples the crown portion to the sole portion to reduce stress at the striking face portion during a collision with the golf ball. In some embodiments, the internal structure is a hollow tube or solid rod composed of a titanium alloy.

  One aspect of the present invention is a golf club head comprising a cast metal body. The cast metal body includes a toe structural connector, a heel structural connector, a striking face portion, a crown return portion, and a sole portion. The toe structure connector includes a body having a crown end, a sole end, a front surface, a rear surface, a heel surface, and a toe surface. The heel structure connector includes a body having a crown end, a sole end, a front surface, a rear surface, a heel surface, and a toe surface. The striking face portion has an outer surface, an inner surface, an upper outer periphery, and a lower outer periphery. The crown return portion extends rearward from the upper outer periphery of the hitting face portion. The sole portion extends rearward from the lower outer periphery of the hitting face portion. The crown end of the toe connector is connected to the crown return portion. The crown end of the heel structure connector is connected to the crown return portion. The sole end of the toe structure connector is connected to the sole portion. The sole end of the heel structure connector is connected to the sole portion. The contact surface area between the crown return portion and both the crown end of the toe structure connector and the crown end of the heel structure connector ranges from 1% to 5% of the surface area of the crown return portion. The toe structure connector and the heel structure connector attenuate the movement of the crown return portion and the sole portion when the hitting face portion collides with the golf ball.

  In some embodiments, each structural connector comprises a structure selected from the group consisting of a solid rod and a hollow tube. In another further embodiment, each structural connector is a solid rod composed of a metallic material selected from the group consisting of a titanium alloy and steel. In an alternative embodiment, each structural connector is located within 0.25 inches from the rear face surface along a vertical plane extending through the face center perpendicular to the striking face portion.

Another aspect of the present invention is a golf club head comprising a metal body comprising a striking face portion, a sole portion extending from the lower edge of the striking face portion, and a return portion extending from the upper edge of the striking face portion. The return portion and the sole portion define an upper opening. The striking face portion, the sole portion, and the return portion define an interior of the hollow body. A first structural connector and a second structural connector are disposed within the hollow body and extend from the return portion to the sole portion. Each of the first structural connector and the second structural connector is a solid metal rod. None of the portions of the first structural connector and the second structural connector are in contact with the striking face portion. The golf club head satisfies the following formula. V _ballnorm ≧ 0.0356x + 140.82, however

  In a further embodiment, the golf club head may include a crown insert that is permanently secured to the body and closes the upper opening. In some embodiments, the crown insert may be made of a carbon composite material, and the first and second structural connectors (reinforcing members) may each be cast integrally with the body.

Yet another aspect of the invention includes a striking face portion, a sole portion extending from the lower edge of the striking face portion, a return portion extending from the upper edge of the striking face portion, and a rear end facing the striking face portion. A golf club head comprising a metal body. The return portion and the sole portion define an upper opening. The striking face portion, the sole portion, and the return portion define an interior of the hollow body. A first structural connector and a second structural connector are disposed within the hollow body and extend from the return portion to the sole portion. A crown insert of carbon composite material is permanently secured to the body to close the upper opening. Each of the first structural connector and the second structural connector is disposed closer to the striking face portion than to the rear end portion within the hollow body. The golf club head has a volume of 420 cubic centimeters to 470 cubic centimeters. The golf club head satisfies the following formula. V _ballnorm ≧ 0.0356x + 141.19, provided

  In some embodiments, the first structural connector comprises an upper end near the return portion and a lower end near the sole portion, the upper end being spaced a first distance from the striking face portion, and the lower end being the striking The face portion is spaced apart by a second distance greater than the first distance. In a further embodiment, the first distance is between 0.120 inches and 0.150 inches and the second distance is between 0.180 inches and 0.210 inches. In another embodiment, the length of each of the first structural connector and the second structural connector is between 1.00 inches and 2.50 inches, and the first structural connector is approximately relative to the second structural connector. Extending in parallel, the first structural connector is spaced from the second structural connector by a distance of 0.75 inches to 1.50 inches.

  Having briefly described the invention, the foregoing and further objects, features and advantages of the invention will become apparent to those skilled in the art from the following detailed description of the invention when considered in conjunction with the accompanying drawings. I will.

1 is a top elevation view of a preferred embodiment of a golf club head having a structural connector. FIG. FIG. 2 is an elevation view of the sole of the golf club head shown in FIG. 1. FIG. 3 is a cross-sectional view of the golf club head shown in FIG. 1 taken along line 3-3. FIG. 3 is a cross-sectional view of the golf club head shown in FIG. 1 taken along line 3-3 and showing the surface of the structural connector. FIG. 4 is a cross-sectional view of the golf club head shown in FIG. 3 taken along line 4-4. FIG. 5 is a cross-sectional view of the golf club head shown in FIG. 3 taken along line 5-5. FIG. 5 is a cross-sectional view of the golf club head shown in FIG. 3 taken along line 5-5. FIG. 6 is a cross-sectional view of the golf club head shown in FIG. 3 taken along line 6-6. FIG. 2 is a top perspective view of the golf club head shown in FIG. 1 with its crown insertion portion and sole cover component removed. It is a sole perspective view of the embodiment shown in FIG. 2 is a flowchart illustrating how to calculate a normalized ball speed of a golf club head, including the embodiment of FIG. 2 is a top plan view of an exemplary calibration plate used to calculate a normalized ball speed for a golf club head. FIG. FIG. 11 is a cross-sectional view of the calibration plate shown in FIG. 10 taken along line 11-11. 6 is a graph showing the relationship between normalized ball speed (y-axis) and characteristic time (μs) (x-axis) for a prior art golf club head and for a golf club head described herein. It is sectional drawing of a golf club head. It is a top plan view of a golf club head. It is a top perspective view of a golf club head. It is a bottom perspective view of a golf club head. 2 is an isolated internal view of a golf club head. FIG. FIG. 6 is an isolated internal view of a crossing portion between a structural connector and a return portion of a golf club head. 1 is a front elevational view of a golf club head having a structural column with a face removed to show the interior of the golf club head. FIG.

  A preferred embodiment of a golf club head 10 having a structural connector is shown in FIGS. The golf club head 10 preferably includes a body 20 having a striking face portion 30. The striking face portion 30 engages the face center 34, a return portion 32 extending rearward from the upper edge 31 of the striking face portion 30, a sole portion 22 extending rearward from the lower edge 33 of the striking face portion 30, and the shaft. A hosel 24, a heel end 23, a toe end 25, an upper opening 26, a hollow interior 27, and a rear end 28. The crown portion 40 includes a return portion 32 and a crown insertion portion 42 disposed over the upper opening 26 so as to surround the hollow interior 27. The body 20 also includes three notches 70, 72, 74 in the central region 21 of the sole portion 22. These notches 70, 72, 74 are closed by a cover part 80 having a density lower than that of the material used to make the body 20. Each of the crown portion 40 and the cover part 80 is preferably made of a carbon composite material, while the body 20 is preferably made of a metal material such as a titanium alloy or steel.

  Within the hollow interior 27, two structural connectors 50, 52 extend upwardly from the sole portion 22 to the return portion 32, generally parallel to the rear surface 36 of the striking face portion 30 and parallel to each other. In an alternative embodiment, the structural connectors 50, 52 extend to the crown insert 42 instead. Importantly, even when the striking face portion 30 hits the golf ball, the structural connectors 50, 52 do not contact the crown portion 40 with any portion of the striking face portion 30 in the vicinity of the striking face portion 30. It is connected to the sole portion 22. The structural connectors 50, 52 must in any case be closer to the striking face portion 30 than to the rear end 28 of the body 20.

  As shown in FIG. 3, the preferred embodiment has two structural connectors 50, 52, each of which is constructed from a lightweight and strong metallic material such as titanium alloy or steel. Although a real rod, in alternative embodiments, each of the structural connectors 50, 52 may be a hollow tube or other hollow structure made of a sturdy lightweight metal or composite material. In another embodiment, the golf club head 10 may include both solid rod and hollow type structural connectors 50. The structural connectors 50, 52 are preferably cast integrally with the body 20 using a wax molding process, but in an alternative embodiment, they are added after the body 20 has been manufactured and welded, brazed, soldered, Alternatively, it may be fixed to the body 20 via adhesion and / or mechanically.

In a preferred embodiment, each of the structural connectors 50, 52 has a diameter of 0.050 inches to 0.200 inches and a length of 1 inch to 2.5 inches. Both structural connectors 50, 52 are located within 1 inch of the rear surface 36 of the striking face portion 30 when measured along a vertical surface 60 that extends perpendicularly to the striking face portion 30 through the face center 34. It is preferable to do. No part of the structural connectors 50, 52 should be outside this 1 inch range. In practice, it is more preferred that each structural connector 50, 52 be located closer to the rear surface 36 of the striking face portion 30. In a preferred embodiment, the structural connector from the rear surface 36 are spaced 0.136 inches to 0.210 inches, the upper end 50a of each structural connectors 50, 52, 52a has a lower end 50b, than the distance _{D 2} of 52b Is also separated by a distance D ₁ slightly closer to the rear surface 36. In a preferred embodiment, D ₁ ranges from 0.120 inches to 0.150 inches, while D ₂ ranges from 0.180 inches to 0.210 inches. Structure connector 50 and 52 is also 0.500 inches to 2.00 inches, more preferably 0.75 inches to 1.50 inches, and most preferably are spaced apart by a distance _{D 3} of approximately 1 inch from each other. Due to the positioning of the structural connectors 50 and 52, the relationship between the normalized ball speed and the characteristic time (CT) measured by the US Golf Association (USGA) CT test in microseconds. Is optimized.

  Depending on the normalized ball speed, various influences of the mass and loft of the golf club head and the structure of a particular golf ball are based on a collision with any given golf club head, including the golf club head 10 of the present invention. Removed from the speed test. In other words, it enables a comparison of golf club head performance under the same conditions. The normalized ball speed can be determined for the golf club head using the following steps, which are also outlined in the flowchart of FIG.

First, as shown in FIGS. 10 and 11, a mass of approximately 190 grams, a diameter D ₄ of approximately ₄ inches, a minimum thickness T ₁ of approximately 0.100 inches to 0.150 inches, and approximately 0.200 inches. providing a calibration plate 90 of titanium 6-4 having a maximum thickness _{T 2} of the ～0.400 inches, the central portion 92 of the calibration plate, striking the test golf ball moving at approximately 109Mph (step 100). The ball return speed _Vbr is measured (step 110). Thereafter, the same test golf ball that travels at approximately 109 mph is hit at the center 34 of the hitting face portion 30 of the golf club head 10 to be evaluated (step 120), and the rebound velocity V _cr of the test golf ball is measured (step 120). Step 130). Next, the plate mass m _p , the golf ball mass m _b , and the golf club head 10 mass m _c were measured and recorded, the measured head test ball velocity (109 mph target) V _cin , the measured plate test The ball speed (109 mph target) V _bin , the measured head test ball return speed V _cr , and the measured plate test ball return speed V _br are recorded (step 140). Finally, the normalized ball _velocity (V _ballnorm ) is calculated using the following equation (step 150).
In this equation, V _inh is 100 and m _h is 200.

The golf club head 10 of the present invention has V _ballnorm ≧ 0.0356x + 140.82, more preferably V _ballnorm ≧ 0.0356x + _141.19 . Positioning the structural connectors 50, 52 allows the golf club head 10 to satisfy this equation. As shown in FIG. 12, a prior art golf club head that does not include the structure of a structural connector is far from this performance metric.

  In addition to optimizing the normalized ball speed of the golf club head 10, positioning the structural connectors (reinforcement members) 50, 52 within the region defined above of the golf club head 10 is relative to the golf club head 10. It has the most significant stress reduction effect. If any of the structural connectors 50, 52 are positioned more than one inch away from the rear surface 36 of the striking face portion 30, they are notable for stress on the striking face portion 30 when the golf club head 10 is used. It will use a reasonable amount of mass without any significant effect and without providing significant performance benefits.

  FIGS. 13-19 illustrate the contact surface areas 55a and 55b between each of the structural connectors 50, 52 and the return portion 32 of the body 20 of the golf club head 10. FIG. The cast metal body 20 preferably includes a toe structure connector 52, a heel structure connector 50, a striking face portion 30, a crown return portion 32, and a sole portion 22.

  In one embodiment shown in FIGS. 3A and 19, the toe connector 52 has a crown end 52a, a sole end 52b, a front face 52c (shown in FIG. 19), a rear face 52d, a heel face 52f, and a toe face 52e. A body is provided. The heel structure connector 50 includes a main body having a crown end 50a, a sole end 50b, a front surface 50c (shown in FIG. 19), a rear surface 50d, a heel surface 50f, and a toe surface 50e. In this embodiment, each of the heel structure connector 50 and the toe structure connector 52 is preferably in the range of 0.02 inches to 0.1 inches, more preferably in the range of 0.025 inches to 0.05 inches, and most preferably. It has a radius of curvature of 0.0395 inches. The striking face portion 30 has an outer surface 30 a, an inner surface 36, an upper outer periphery 31, and a lower outer periphery 33. The crown return portion 32 is preferably 0.5 inches to 1.5 inches, more preferably 0.6 inches to 1.0 inches, and most preferably 0.725 inches rearward from the upper perimeter 31 of the striking face portion 30. Extend. The sole portion 22 extends rearward from the lower outer periphery 33 of the hitting face portion 30. The crown end 52 a of the toe connector 52 is connected to the crown return portion 32. The crown end 50 a of the heel structure connector 50 is connected to the crown return portion 32. The sole end 52 b of the toe structure connector 52 is connected to the sole portion 22. The sole end 50 b of the heel structure connector 50 is connected to the sole portion 22.

  The contact surface areas 57a, 57b between the crown return portion 32 and both the crown end 52a of the toe structure connector 52 and the crown end 50a of the heel structure connector 50 are 1% to 5% of the surface area of the crown return portion 32. It is a range. The surface area of the crown return portion is in the range of 2.5 square inches to 4.0 square inches. The contact surface area 55a between the crown return portion 32 and the crown end 52a of the toe connector 52 is preferably in the range of 0.02 square inches to 0.1 square inches, more preferably 0.035 square inches to It is in the range of 0.075 square inches, most preferably 0.045 square inches. As shown in FIG. 18, the contact surface area 55b between the crown return portion 32 and the crown end 50a of the heel structure connector 50 is preferably in the range of 0.02 square inches to 0.1 square inches, more preferably 0. It is in the range of 0.035 square inches to 0.075 square inches, most preferably 0.045 square inches. As shown in FIG. 17, the contact surface area 57a between the sole portion 22 and the sole end 52b of the toe structure connector 52 is preferably in the range of 0.015 square inches to 0.1 square inches, more preferably. It ranges from 0.025 square inches to 0.05 square inches, most preferably 0.03 square inches. Contact surface area 57b between sole portion 22 and sole end 50b of heel structure connector 50 is preferably in the range of 0.015 square inches to 0.1 square inches, more preferably 0.025 square inches to 0.05. It is in the range of square inches, most preferably 0.03 square inches.

  The toe structure connector 52 and the heel structure connector 50 preferably attenuate the movement of the crown return portion 32 and the sole portion 22 when the striking face portion 30 strikes the golf ball.

  Each of the toe structure connector 52 and the heel structure connector 50 preferably has a length from the sole ends 50b, 52b to the crown ends 50a, 52a in the range of 1 inch to 2.5 inches. As shown in FIG. 3A, the heel surface 52f of the toe structure connector 52 has a distance from the toe surface 50e of the heel structure connector 50 in the range of 0.75 inches to 1.5 inches. Contact areas 55a, 55b between the crown return portion 32 and each of the toe structure connector 52 and the heel structure connector 50 are preferably in the range of 0.02 square inches to 0.04 square inches.

  As shown in FIG. 5A, the respective front faces 50c and 52c of the toe connector 52 and the heel structure connector 50 are at least 0.120 inches behind the inner surface 36 of the striking face portion 30, and the toe structure connector 52 and the heel Each rear face 50 d, 52 d of the structural connector 50 is rearward within 1.0 inch from the inner surface 36 of the striking face portion 30.

  When the golf club head 10 is designed as a driver, its volume is preferably 200 cubic centimeters to 600 cubic centimeters, more preferably 300 cubic centimeters to 500 cubic centimeters, and most preferably 420 cubic liters. Centimeters to 470 cubic centimeters with the most preferred volume being 460 cubic centimeters. In a preferred embodiment, the golf club head 10 has a volume of approximately 450 cubic centimeters to 460 cubic centimeters.

  The volume of the golf club head 10 also varies between fairway woods (preferably in the range of 3 wood to 11 wood) having a smaller volume than the driver. When designed as a driver, the golf club head 10 preferably has a mass of 215 grams or less, and most preferably has a mass of 180 grams to 215 grams, and when designed as a fairway wood, Preferably they are 135 grams-200 grams, Preferably they are 140 grams-165 grams.

  In each of the embodiments disclosed herein, the striking face portion 30 may have a variable thickness such as that disclosed in US Pat. No. 7,448,960 entitled “Golf Club Head With Variable Face Thickness”. Preferably, the relevant parts are incorporated herein by reference. Other alternative embodiments of the thickness of the striking face portion 30 are US Pat. No. 6,398,666 entitled “Golf Club Strike Plate With Variable Thickness”, US Pat. No. 6,471,603 entitled “Contoured Golf Club Head”. And U.S. Pat. No. 6,368,234, entitled “Golf Club Striving Plate Haven Elliptical Regions Of Thickness”, all of which are owned by Callaway Golf Company, the contents of which are hereby incorporated by reference. Incorporated into. Alternatively, the striking face portion 30 may have a uniform thickness.

  In each of the embodiments disclosed herein, the body 20 is preferably cast from molten metal in a manner such as the well-known lost wax casting method. The casting metal is preferably a titanium or titanium alloy, such as a 6-4 titanium alloy, an alpha-beta titanium or beta titanium alloy for forging, and 6-4 titanium for casting. Alternatively, the body 20 is constructed from a 17-4 steel alloy. Additional methods for manufacturing the body 20 include forming the body 20 from a metal flat plate, forming the superplastic body from a metal flat plate, machining the body 20 from a solid metal block, and forging. Includes electrochemical polishing of the body 20 from a preform, casting of the body using centrifugal casting, casting of the body 20 using levitation casting, and similar manufacturing methods.

  In other embodiments, the golf club head 10 is made of US Pat. No. 6,244,976, US Pat. No. 6,332,847, US Pat. No. 6,386,990, US Pat. No. 6,406,378, US Pat. No. 6,644,0008. US Pat. No. 6,471,604, US Pat. No. 6,491,592, US Pat. No. 6,627,650, US Pat. No. 6,655,452, US Pat. No. 6,575,845, US Pat. No. 6,478,692, US Pat. No. 6,582,323, US Pat. No. 6,508,978, US Pat. No. 6,592,466, US Pat. No. 6,602,149, US Pat. No. 6,607,452, US Pat. No. 6,612,398, US Pat. No. 66663504, US special US Pat. No. 6,669,578, US Pat. No. 6,739,982, US Pat. No. 6,758,763, US Pat. No. 6,860,824, US Pat. No. 6,994,637, US Pat. No. 7,056,692, US Pat. No. 7, U.S. Pat. No. 7,121,148, U.S. Pat.No. 7,118,493, U.S. Pat.No. 7,121,957, U.S. Pat.No. 7,125,344, U.S. Pat. No. 7,128,661, U.S. Pat. US Pat. No. 7,226,366, US Pat. No. 7,252,600, US Pat. No. 7,258,631, US Pat. No. 7,314,418, US Pat. No. 7,320,646, US Pat. No. 7,387,577, U.S. Pat. No. 7,396,296 US Pat. No. 7,402,112, US Pat. No. 7,407,448, US Pat. No. 7,413,520, US Pat. No. 7,431,667, US Pat. No. 7,438,647, US Pat. No. 7,455,598, US Pat. No. 7,476,161, US Pat. No. 7,491,134, US Pat. No. 7,497,787, US Pat. No. 7,499,935, US Pat. No. 7,578,751, US Pat. No. 7,717,807, US It may have a composite configuration such as those disclosed in any of US7749096 and US7749097, the disclosure of each of which is incorporated herein in its entirety.

  From the foregoing description, those skilled in the art will appreciate the valuable advantages of the present invention, and the present invention has been described in connection with preferred and other embodiments thereof, as shown in the accompanying drawings, It will be readily understood that numerous variations, modifications and equivalent substitutions may be made thereto without departing from the spirit and scope of the invention, and the invention resides in the following appended claims. It is intended that the present invention is not limited by the foregoing description, except for matters that may be indicated in the scope of the above. Accordingly, the embodiments of the invention in which an exclusive property or privilege is claimed are defined in the following appended claims.

DESCRIPTION OF SYMBOLS 10 Golf club head 20 Main body 21 Center area | region 22 Sole part 23 Heel end 24 Hosel 25 Toe end 26 Upper opening part 27 Hollow inside 28 Rear end part 30 Impact face part 30a External surface 31 Upper edge, upper outer periphery 32 Crown return part 33 Bottom Edge, lower outer periphery 34 face center 36 rear surface, inner surface 40 crown portion 42 crown insertion portion 50 heel structure connector 52 toe structure connector 50a, 52a crown end 50b, 52b sole end 50c, 52c front surface 50d, 52d rear surface 50e, 52e Toe surface 50f, 52f Heel surface 55a, 55b Contact surface area 57a, 57b Contact surface area 60 Vertical surface 70, 72, 74 Notch 80 Cover part 90 Calibration plate 92 Center

Claims (20)

A toe structure connector including a body having a crown end, a sole end, a front surface, a rear surface, a heel surface, and a toe surface;
A heel structure connector including a body having a crown end, a sole end, a front surface, a rear surface, a heel surface, and a toe surface;
A striking face portion having an outer surface, an inner surface, an upper outer periphery, and a lower outer periphery;
A crown return portion extending rearward from the upper outer periphery of the hitting face portion;
A golf club head comprising a cast metal body having a sole portion extending rearward from the outer periphery of the lower portion of the hitting face portion,
The crown end of the toe structure connector is connected to the crown return part, the crown end of the heel structure connector is connected to the crown return part, and the sole end of the toe structure connector is connected to the sole part. Connected, and the sole end of the heel structure connector is connected to the sole portion;
The surface area of contact between the crown return portion and both the crown end of the toe structure connector and the crown end of the heel structure connector ranges from 1% to 5% of the surface area of the crown return portion;
The golf club head, wherein the toe structure connector and the heel structure connector attenuate movement of the crown return portion and the sole portion when the hitting face portion collides with a golf ball.   The golf club head according to claim 1, wherein each of the toe structure connector and the heel structure connector has a length from the sole end to the crown end in a range of 1 inch to 2.5 inches.   The golf club head according to claim 1, wherein the heel surface of the toe structure connector has a distance from the toe surface of the heel structure connector in a range of 0.75 inches to 1.5 inches.   The golf club head of claim 1, having a volume ranging from 420 cubic centimeters to 470 cubic centimeters.   The golf club head according to claim 1, wherein the cast metal body is made of a titanium alloy.   The golf club head of claim 1, having a mass in the range of 185 grams to 215 grams.   The golf club head according to claim 1, further comprising a crown portion made of a carbon composite material.   The golf club head according to claim 1, wherein the sole portion includes a plurality of notches covered by a plurality of cover parts each formed of a carbon composite material.   The golf club head of claim 1, wherein a contact area between the crown return portion and each of the toe structure connector and the heel structure connector is in the range of 0.02 square inches to 0.04 square inches. .   The front surface of each of the toe structure connector and the heel structure connector is at least 0.120 inches rearward from the inner surface of the striking face portion, and the rear surface of each of the toe structure connector and the heel structure connector The golf club head of claim 1, wherein the golf club head is rearward within 1.0 inch of the inner surface of the striking face portion. A toe connector comprising a body having a crown end, a sole end, a front arc surface, a rear arc surface, a heel arc surface, and a toe arc surface;
A heel structure connector including a body having a crown end, a sole end, a front arc surface, a rear arc surface, a heel arc surface, and a toe arc surface;
A striking face portion having an outer surface, an inner surface, an upper outer periphery, and a lower outer periphery;
A crown return portion extending rearward from the upper outer periphery of the hitting face portion;
A sole portion extending rearward from the outer periphery of the lower portion of the hitting face portion;
The hosel part,
A golf club head comprising a cast metal body having a crown body made of a carbon composite material attached to the crown return portion;
The crown end of the toe structure connector is connected to the crown return part, the crown end of the heel structure connector is connected to the crown return part, and the sole end of the toe structure connector is connected to the sole part. Connected, and the sole end of the heel structure connector is connected to the sole portion;
The contact surface area between the crown return portion and both the crown end of the toe structure connector and the crown end of the heel structure connector is in the range of 1% to 5% of the surface area of the crown return portion;
The golf club head, wherein the toe structure connector and the heel structure connector attenuate movement of the crown return portion and the sole portion when the hitting face portion collides with a golf ball.   12. The golf club head according to claim 11, wherein the toe structure connector and the heel structure connector each have a length from the sole end to the crown end in the range of 1 inch to 2.5 inches.   The golf club head according to claim 11, wherein the heel arc surface of the toe structure connector has a distance from the toe arc surface of the heel structure connector in a range of 0.75 inches to 1.5 inches.   The golf club head of claim 11, having a volume ranging from 420 cubic centimeters to 470 cubic centimeters.   The golf club head of claim 11, wherein the cast metal body is composed of a titanium alloy.   The golf club head of claim 11, having a mass in the range of 185 grams to 215 grams.   The golf club head according to claim 11, wherein a body of each of the toe structure connector and the heel structure connector is hollow.   The golf club head according to claim 11, wherein the sole portion includes a plurality of cutout portions each covered with a plurality of cover parts made of a carbon composite material.   The golf club head of claim 11, wherein a contact area between the crown return portion and each of the toe structure connector and the heel structure connector is in the range of 0.02 square inches to 0.03 square inches. .   The golf club head of claim 11, wherein the cast metal body is composed of a steel material.