Open back cavity golf club head

Abstract

To provide a golf club head with energy storage properties. [Solution] In some embodiments, the golf club head comprises a hollow body having a strike face, a heel region, a toe region opposite the heel region, a sole, a top rail, and a flex point. The flex point increases the bending of the strike face, thereby improving performance compared to clubs without a flex point.

Claims

1. It is a golf club head, A body having a sole and a top rail facing the sole, A faceplate that defines the strike face, The back wall facing the aforementioned strike face, A partial back cavity defined within the club head between the face plate, the back wall, the sole, and the top rail, A recess formed in the back wall and extending toward the strike face, The rear opening defined within the recess, which communicates with the partial back cavity outside or near the golf club head, A golf club head having an intermediate plane that extends through the geometric center of the strike face and perpendicular to the strike face between the top rail and the sole, such that at least half of the rear opening is located between the intermediate plane and the top rail.

2. The aforementioned intermediate plane divides the strike face into an upper region and a lower region. The golf club head according to claim 1, wherein the projection area of ​​the rear opening is defined by projecting the area of ​​the rear opening onto the strike face in a direction parallel to the intermediate plane.

3. The golf club head according to claim 2, wherein at least 50% of the projection area is located in the upper area.

4. The aforementioned back wall surrounds the recess and defines the recess. The golf club head according to claim 1, wherein the back wall extends between the top rail and the sole.

5. The aforementioned back wall is further divided into an upper back wall and a lower back wall. The aforementioned upper back wall is adjacent to the top rail and extends downward from the top rail. The golf club head according to claim 4, wherein the lower back wall is adjacent to the sole and extends upward from the sole.

6. The rear opening rim surrounds the rear opening. The aforementioned rear opening rim is divided into an upper rim and a lower rim. The upper rim is located near the top rail and follows the contour of the upper back wall. The golf club head according to claim 5, wherein the lower rim is located near the sole and follows the contour of the lower back wall.

7. The golf club head according to claim 6, wherein the badge is positioned within the rear opening rim to close off at least a portion of the recess from the partial back cavity.

8. The golf club head according to claim 7, wherein the badge is bonded to the upper rim and the lower rim.

9. The golf club head according to claim 8, wherein the badge is made from one of aluminum, titanium, polymer, elastomer, or composite material.

10. The golf club head according to claim 1, wherein the face plate is made from one of the following: C300 steel, 17-4 stainless steel, 455 steel, 475 steel, 431 steel, maraging steel, titanium, composite material, C350 steel, Ni-Co-Cr steel alloy, quenched and tempered steel alloy, or 565 steel.

11. The golf club head according to claim 1, wherein the body is made from one of 17-4 stainless steel, 455 steel, 475 steel, 431 steel, maraging steel, titanium, or a composite material.

12. The aforementioned strike face is coated with a durable finish. The durable finish is a Hydropearl 2.0 chrome plated finish or a high-polished chrome finish, according to claim 1;

13. The badge covers the entire rear opening, as described in claim 7 of the golf club head.

14. The badge covers the upper part of the rear opening, The upper part of the rear opening is adjacent to the upper rim, as described in claim 7, for the golf club head.

15. The aforementioned badge covers the lower part of the rear opening, The lower part of the rear opening is adjacent to the lower rim, as described in claim 7, for the golf club head.

16. The golf club head according to claim 7, wherein the badge is selectively removable.

17. The golf club head according to claim 7, wherein the partial back cavity of the club head can be filled with a vibration-damping filling material.

18. The golf club head according to claim 17, wherein the vibration damping filling material can fill 10% to 80% of the volume of the partial back cavity.

19. The golf club head according to claim 18, wherein the vibration damping filling material may be one of polyethylene terephthalate, high-density polyethylene, polyvinyl chloride, polycarbonate, polypropylene, hot melt, other thermoplastic resins, composite materials, or polymers.

20. The golf club head according to claim 7, wherein the vibration damping filling material may have a specific gravity in the range of 0.05 to 4.

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