FITTING METHOD OF GOLF CLUB

• US 20130288829A1
• Filed: 04/26/2013
• Published: 10/31/2013
• Est. Priority Date: 04/27/2012
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Dunlop Sports Co. Ltd. (Sumitomo Rubber Industries Limited)
• Inventors: KIMIZUKA, Wataru, ONUKI, Masahide
• Granted Patent: US 10,806,979 B2
• Time in Patent Office: Days
• US Class Current: 473/409
• CPC Class Codes: A63B 2024/0012 Comparing movements or motion sequences with a registered reference
• CPC Class Codes: A63B 2220/805 Optical or opto-electronic sensors
• CPC Class Codes: A63B 2220/807 Photo cameras
• CPC Class Codes: A63B 24/0006 Computerised comparison for qualitative assessment of motion sequences or the course of a movement
• CPC Class Codes: A63B 53/00 Golf clubs
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/42 Devices for measuring, verifying, correcting or customising the inherent characteristics of golf clubs, bats, rackets or the like, e.g. measuring the maximum torque a batting shaft can withstand
• CPC Class Codes: A63B 69/3605 Golf club selection aids informing player of his average or expected shot distance for each club
• CPC Class Codes: A63B 69/3623 for driving A63B69/3608, A63B69/3658, A63B69/3661, A63B69/3667 and A63B69/3691 take precedence

Abstract

This fitting method includes, for example, the following steps A1 to E1:

• • (A1) a step of measuring a plurality of impact conditions using a reference club;
  • (B1) a step of obtaining hit ball arrival point data;
  • (C1) a step of selecting two or more of the plurality of impact conditions as explanation variables and performing multiple linear regression analysis with the hit ball arrival point data as an objective variable;
  • (D1) a step of selecting a specific explanation variable from the two or more explanation variables based on a result of the multiple linear regression analysis; and
  • (E1) a step of determining a recommended club including a specification capable of suppressing variation in the specific explanation variable.

Claims

1. A fitting method of a golf club, comprising the following step A1, step B1, step C1, step D1, and step E1:

(A1) a step of measuring a plurality of impact conditions using a reference club;

(B1) a step of obtaining hit ball arrival point data;

(C1) a step of selecting two or more of the plurality of impact conditions as explanation variables and performing multiple linear regression analysis with the hit ball arrival point data as an objective variable;

(D1) a step of selecting a specific explanation variable from the two or more explanation variables based on a result of the multiple linear regression analysis; and

(E1) a step of determining a recommended club including a specification capable of suppressing variation in the specific explanation variable.

2. The fitting method according to claim 1, wherein the specific explanation variable is selected based on a degree of contribution to the objective variable.

3. The fitting method according to claim 2, wherein the degree of contribution is a standard partial regression coefficient.

4. The fitting method according to claim 1, wherein the explanation variables in the step C1 are selected by a variable selection method.

5. The fitting method according to claim 1, wherein the impact conditions are two or more selected from a head speed, a face angle, a shaft angle, a lie angle, a dynamic loft, an entering angle, a blow angle, a lateral hit point, and a vertical hit point.

6. The fitting method according to claim 1, wherein the hit ball arrival point data is at least one selected from a flight distance and lateral deviation.

7. A fitting method of a golf club, comprising the following step A2, step B2, step C2, and step D2:

(A2) a step of measuring a subject'"'"'s head speed, dynamic loft, and blow angle using a reference club;

(B2) a step of determining a suitable dynamic loft predicted that a hit ball result is good based on the measured head speed and the measured blow angle;

(C2) a step of determining a dynamic loft difference from the suitable dynamic loft and the measured dynamic loft; and

(D2) a step of determining a recommended loft angle based on a loft angle of the reference club and the dynamic loft difference.

8. The fitting method according to claim 7, wherein the recommended loft angle is selected from a plurality of previously prepared recommended loft angle candidates in the step D2.

9. The fitting method according to claim 7, wherein the hit ball result is a flight distance.

10. The fitting method according to claim 7, wherein a hit ball result database obtained by actual measurement and/or a simulation is used in the prediction in the step B2.

11. The fitting method according to claim 10, wherein the hit ball result database is correlation data between the dynamic loft and the blow angle which are created for each head speed.

12. The fitting method according to claim 10, wherein the hit ball results in the dynamic lofts in the measured blow angle are compared using the hit ball result database in the prediction in the step B2.