Golf club heads with face deflection junctions and related methods
Embodiments of golf club heads with deflection junctions are described herein. For example, a golf club head comprising: a crown, a sole, a toe skirt, a heel skirt; and a front end. The front end comprises a strikeplate having a strikeface, a backface, and a strikeplate perimeter, wherein the strikeplate and a joint segment are connected by a fixed joint. A deflection junction of the golf club head comprises a junction structure extending from the junction segment; a junction slot defined between the strikeplate perimeter and the junction structure; and a pivot bend between the junction segment and the junction structure and configured to pivot the junction structure relative to the junction segment upon impact between the strikeface and a golf ball. Other examples and related methods are also disclosed herein.
1. A golf club head comprising:
a crown, a sole, a toe skirt, a heel skirt; and
a front end comprising:
a strikeplate comprising:
a strikeface;
a backface; and
a strikeplate perimeter;
a fixed joint between the strikeplate and a joint segment comprising at least one of a front of one of: the crown, the sole, the toe skirt, or the heel skirt; and
a deflection junction configured to permit deflection between the strikeplate and a junction segment comprising at least one of the front of a different one of:
the crown, the sole, the toe skirt, or the heel skirt;
wherein:
the deflection junction comprises:
a junction structure extending from the junction segment;
a junction slot defined between the strikeplate perimeter and the junction structure; and
a pivot bend between the junction segment and the junction structure and configured to pivot the junction structure relative to the junction segment upon impact between the strikeface and a golf ball;
the strikeplate perimeter is disconnected from the junction segment; and
the pivot bend comprises a thickness of approximately 0.75 mm to approximately 3.8 mm.
2. The golf club head of claim 1 , wherein:
the deflection junction comprises:
a compressible material located at the junction slot between the junction segment and at least one of:
the strikeplate perimeter; and
the backface of the strikeplate.
3. The golf club head of claim 1 , wherein:
the compressible material comprises at least one of:
a polyurethane material;
a rubber material; or
a Poisson ratio greater than approximately 0.4.
4. The golf club head of claim 1 , wherein:
the strikeface comprises a strikepoint through which a loft plane extends;
the backface comprises a backpoint located opposite the strikepoint and through which a backplane extends;
the backplane is parallel to the loft plane; and
the junction structure comprises:
a front wall portion located between the loft plane and the backplane; and
a rear wall portion located rearwards of the backplane.
5. The golf club head of claim 4 , wherein:
the rear wall portion overlaps a segment of the backface; and
the rear wall portion and the segment of the backface remain separated from each other throughout impact of the strikeface with a golf ball.
6. The golf club head of claim 1 , wherein:
if the fixed joint extends adjacent to one of the crown or the sole:
the deflection junction extends adjacent to a different one of the crown or the sole; and
if the fixed joint extends adjacent to one of the toe skirt or the heel skirt:
the deflection junction extends adjacent to a different one of the toe skirt or the heel skirt.
7. The golf club head of claim 1 , wherein:
upon impact between the strikeface and a golf ball at approximately 50 miles per hour to approximately 150 miles per hour:
the deflection junction is configured to permit the strikeplate perimeter to deflect, relative to the junction structure, between approximately 0.5 mm and approximately 1.5 mm.
8. The golf club head of claim 1 , wherein a forward end of the junction slot is visible from forward of the front end of the golf club head and from a top address point of view of the golf club head.
9. The golf club head of claim 1 , wherein the junction slot is not exposed to an underside of the golf club head.
10. The golf club head of claim 1 , wherein a minimum thickness of the junction slot, from the backface to the junction segment, is at least approximately 0.5 mm.
11. A golf club head comprising:
a crown, a sole, a toe skirt, a heel skirt; and
a front end comprising:
a strikeplate comprising:
a strikeface;
a backface; and
a strikeplate perimeter;
a fixed joint between the strikeplate and a joint segment comprising at least one of a front of one of:
the crown, the sole, the toe skirt, or the heel skirt; and
a multiple deflection junction configured to permit deflection between the strikeplate and a junction segment comprising at least two of the front of a different one of:
the crown, the sole, the toe skirt, or the heel skirt;
wherein:
the multiple deflection junction comprises:
a junction structure extending from the junction segment;
a junction slot defined between the strikeplate perimeter and the junction structure; and
a pivot bend between the junction segment and the junction structure and configured to pivot the junction structure relative to the junction segment upon impact between the strikeface and a golf ball;
the strikeplate perimeter is disconnected from the junction segment; and
the pivot bend comprises a thickness of approximately 0.75 mm to approximately 3.8 mm.
12. The golf club head of claim 11 , wherein:
the deflection junction comprises:
a compressible material located at the junction slot between the junction segment and at least one of:
the strikeplate perimeter; and
the backface of the strikeplate.
13. The golf club head of claim 11 , wherein:
the compressible material comprises at least one of:
a polyurethane material;
a rubber material; or
a Poisson ratio greater than approximately 0.4.
14. The golf club head of claim 11 , wherein:
the strikeface comprises a strikepoint through which a loft plane extends;
the backface comprises a backpoint located opposite the strikepoint and through which a backplane extends;
the backplane is parallel to the loft plane; and
the junction structure comprises:
a front wall portion located between the loft plane and the backplane; and
a rear wall portion located rearwards of the backplane.
15. The golf club head of claim 14 , wherein:
the rear wall portion overlaps a segment of the backface, proximate the strikeplate perimeter, and along the deflection junction; and
the rear wall portion and the segment of the backface remain separated from each other throughout impact of the strikeface with a golf ball.
16. The golf club head of claim 11 , wherein:
if the fixed joint extends adjacent to one of the crown or the sole:
the deflection junction extends adjacent to a different one of the crown or the sole; and
if the fixed joint extends adjacent to one of the toe skirt or the heel skirt:
the deflection junction extends adjacent to a different one of the toe skirt or the heel skirt.
17. The golf club head of claim 11 , wherein:
upon impact between the strikeface and a golf ball at approximately 50 miles per hour to approximately 150 miles per hour:
the deflection junction is configured to permit the strikeplate perimeter to deflect, relative to the junction structure, between approximately 0.5 mm and approximately 1.5 mm.
18. The golf club head of claim 11 , wherein a forward end of the junction slot is visible from forward of the front end of the golf club head and from a top address point of view of the golf club head.
19. The golf club head of claim 11 , wherein the junction slot is not exposed to an underside of the golf club head.
20. The golf club head of claim 11 , wherein a minimum thickness of the junction slot, from the backface to the junction segment, is at least approximately 0.5 mm.