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Wood golf club head and wood golf club

a golf club and golf club technology, applied in golf clubs, golf courses, sport apparatus, etc., can solve the problems of reducing the center of gravity depth, the difficulty of the club head having a sufficiently increased center of gravity angle, etc., to achieve the effect of increasing the center of gravity angle and avoiding club face rotation lag

Inactive Publication Date: 2016-09-22
MIZUNO CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention aims to improve the performance of wood golf club heads by reducing their center-of-gravity distance and depth. By doing so, the club head is better able to achieve a sufficient increase in center-of-gravity angle and avoid center-of-gravity rotation lag. The invention provides wood golf club heads for drivers, fairway woods, and utility crabs that achieve this improvement through a ratio of maximum length to volume of the club head. These improvements enhance the accuracy and consistency of the wood golf clubs.

Problems solved by technology

However, when conventional wood golf club heads simply have their center-of-gravity distances reduced they have a tendency to also have center-of-gravity depths reduced.
As a consequence, such a wood golf club head is difficult to have a sufficiently increased center-of-gravity angle and hence to be improved to sufficiently avoid club face rotation lag.

Method used

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  • Wood golf club head and wood golf club
  • Wood golf club head and wood golf club
  • Wood golf club head and wood golf club

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Experimental program
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Effect test

first embodiment

[0023]With reference to FIG. 1, a wood golf club head 10 according to a first embodiment will be described. Wood golf club head 10 is a golf club head used for a wood golf club and is a head used for a driver, a fairway wood, or a utility club. Hereinafter, a case will be described in which wood golf club head 10 according to the first embodiment is configured as a wood golf club head used for a driver.

[0024]FIG. 1 is a plan view of wood golf club head 10 as a driver head as seen from the side of a crown portion 5. FIG. 2 is a partial perspective view of wood golf club head 10 as the driver head as seen from the side of a sole portion 6.

[0025]As shown in FIG. 1, wood golf club head 10 in the present embodiment includes a face portion 1, a heel portion 2, a toe portion 3, a back portion 4, crown portion 5, and sole portion 6.

[0026]Face portion 1 has a ball hitting surface 1A and is located at a front side of wood golf club head 10. Heel portion 2 is located at an end on the side of a...

second embodiment

[0048]With reference to FIG. 5, a wood golf club head 20 according to a second embodiment will be described. Wood golf club head 20 according to the second embodiment basically has a configuration similar to that of wood golf club head 10 according to the first embodiment, except that concave area 7 does not have a wall portion which isolates the interior of wood golf club head 20 from outside. In other words, wood golf club head 20 differs from wood golf club head 10 in that concave area 7 is not provided with end surface 7A that connects crown portion 5 and sole portion 6.

[0049]Concave area 7 has an opening which connects the interior of wood golf club head 20 (the hollow region) to outside. End surface 7A of concave area 7 is formed to surround the opening.

[0050]This still allows wood golf club head 20 according to the second embodiment to have concave area 7 and also provides concave area 7 without a wall portion, and wood golf club head 20 can thus have a larger center-of-gravi...

third embodiment

[0051]With reference to FIG. 6, a wood golf club head 30 according to a third embodiment will be described. Wood golf club head 30 according to the third embodiment basically has a configuration similar to that of wood golf club head 10 according to the first embodiment, except that wood golf club head 30 includes a fixed member 8 fixed to at least a portion of concave area 7.

[0052]Fixed member 8 is formed of a material having a lower specific gravity than a body material forming face portion 1, heel portion 2, toe portion 3, back portion 4, crown portion 5, and sole portion 6. When wood golf club head 30 is formed of the same material except for fixed member 8, fixed member 8 is formed of a material having a lower specific gravity than a material forming wood golf club head 30 such as face portion 1 other than fixed member 8. Fixed member 8 is preferably formed of a material of large strength. Fixed member 8 is mainly formed of at least one material selected from a group consisting...

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PUM

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Abstract

A wood golf club head used for a driver, comprises: a face portion having a ball hitting surface; a heel portion located at an end on the side of a shaft relative to the ball hitting surface; and a toe portion located at an end facing away from the heel portion relative to the ball hitting surface. A ratio of a maximum length (L1 (unit: mm)) of the wood golf club head in a direction from the heel portion toward the toe portion relative to the volume of the wood golf club head (unit: cm3) is equal to or greater than 0.30 and equal to or less than 1.04.

Description

[0001]This nonprovisional application is based on Japanese Patent Application No. 2015-054347 filed on Mar. 18, 2015 with the Japan Patent Office, the entire contents of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a wood golf club head and a wood golf club.[0004]2. Description of the Background Art[0005]There is a tendency for wood golf clubs to have a head increased in volume. A head increased in volume generally has a center of gravity having an increased minimal distance to the shaft's axial centerline (or an increased center-of-gravity distance), and accordingly has a tendency for the club face to lag its rotation.[0006]Accordingly, to avoid club face rotation lag, a wood golf club head having a reduced center-of-gravity distance has been proposed (see Japanese Patent No. 5087328 for example).SUMMARY OF INVENTION[0007]However, when conventional wood golf club heads simply have their c...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A63B53/04
CPCA63B2053/0412A63B53/0466A63B2053/0491A63B53/0408A63B53/0412A63B53/0433A63B53/0437
Inventor ISHIDA, KAZUYA
Owner MIZUNO CORPORATION