JP7181696B2 - golf club head - Google Patents

Description

The present invention relates to golf club heads.

In conventional golf club heads, consideration has been given to making the crown portion easily flexible in order to improve the hitting performance of the golf ball. On the other hand, the strength of the crown portion is also important, and in order to improve the strength of the crown portion, for example, fiber-reinforced resin or the like is used as the material forming the crown portion.

However, depending on the material forming the crown portion and the method of arranging the crown portion, the increase in the strength of the crown portion may hinder the bending of the crown portion.

Patent No. 4759333 JP 2005-137819 A Patent No. 4403084 JP-A-2000-229135

SUMMARY OF THE INVENTION An object of the present invention is to provide a golf club head in which the strength of the crown portion is improved without hindering the bending of the crown portion.

The present golf club head is a wood-type golf club head comprising a face portion, a sole portion, and a crown portion, and has a crown member forming part of the crown portion, and the crown portion has an opening. , the crown member has a first member and a second member, the opening is closed, the first member is a laminate in which a plurality of sheets of fiber reinforced resin are laminated, and a plurality of The sheet-like fiber reinforced resin includes a carbon fiber reinforced resin sheet in which carbon fibers are aligned in one direction and impregnated with epoxy resin, and a glass fiber reinforced resin sheet which is a composite material of glass fiber and resin. , wherein the second member is made of a metal wire, the second member is sandwiched between a plurality of sheets of the fiber reinforced resin, and the glass fiber reinforced resin sheet is more dense than the second member. The carbon fiber reinforced resin sheet is arranged on the outer side of the golf club head, the carbon fiber reinforced resin sheet is arranged on the inner side of the golf club head than the second member, and the metal wire is visible from the outside of the golf club head, The second member is required to extend in the toe-heel direction.

According to the disclosed technique, it is possible to provide a golf club head in which the strength of the crown portion is improved without hindering the bending of the crown portion.

It is a figure which illustrates the golf club head 1 which concerns on this Embodiment. 1 is an exploded view illustrating a golf club head 1 according to an embodiment; FIG.

Hereinafter, embodiments will be described with reference to the drawings. In addition, in each drawing, the same code|symbol may be attached|subjected to the same component part, and the overlapping description may be abbreviate|omitted.

1A and 1B are diagrams illustrating a golf club head 1 according to the present embodiment, FIG. 1A being a plan view and FIG. 1B being a right side view. In FIG. 1, arrow _d1 indicates the toe-heel direction (horizontal direction), arrow _d2 indicates the top-sole direction (vertical direction), and arrow _d3 indicates the face-back direction (front-rear direction).

2A and 2B are exploded views illustrating the golf club head 1 according to the present embodiment, FIG. 2] is a right side view of the head body member 10 and the crown member 20. [FIG.

The golf club head 1 shown in FIGS. 1 and 2 is a wood type golf club head such as a driver, but it may be a utility or fairway wood. Also, the golf club head 1 can be assembled by joining a plurality of parts. The golf club head 1 will be described in detail below.

The golf club head 1 is a hollow structure having a head body member 10 and a crown member 20 fixed to the head body member 10 . The inner surface of the hollow structure may be referred to as the inner surface of the head, and the outer surface thereof may be referred to as the outer surface of the head.

The head body member 10 has a face portion 11 , a crown portion 12 , a sole portion 13 , side portions 14 and a hosel portion 15 .

The face portion 11 is a portion having a face surface that serves as a hitting surface. The crown portion 12 is a portion that forms the upper portion of the golf club head 1 together with the crown member 20 . Detailed structures of the crown portion 12 and the crown member 20 will be described later. The sole portion 13 is a portion that forms the bottom portion of the golf club head 1 . The side portion 14 is a portion that connects the crown portion 12 and the sole portion 13 . The hosel portion 15 is a portion connected to the shaft.

The crown portion 12 of the head body member 10 has an opening 121 and a stepped portion 122 formed to surround the opening 121 . The stepped portion 122 is positioned one step below the outer surface of the head, and can position, hold, and secure the outer edge of the crown member 20 . The crown member 20 is attached to the stepped portion 122 of the crown portion 12 of the head body member 10 with an adhesive or the like to close the opening 121 .

The head body member 10 can be produced by, for example, casting, forging, 3D printing, other molding methods, or the like. As the material of the head body member 10, for example, a metallic material, a non-metallic material, a material having a lower specific gravity than the metallic material, or the like can be used. Specific materials include, for example, titanium, titanium alloys, stainless steel, aluminum, aluminum alloys, iron-based metals, magnesium, magnesium alloys, and fiber-reinforced resins.

The crown member 20 has a resin portion 30 and metal wires 40 and constitutes a part of the crown portion 12 . The resin part 30 has a fiber reinforced resin. The resin portion 30 is a representative example of the first member according to the invention, and the metal wire 40 is a representative example of the second member according to the invention.

Here, the fiber-reinforced resin is a composite material of a reinforcing fiber and a resin. Examples of fibers that constitute the fiber-reinforced resin include glass fibers, carbon fibers, aramid fibers, polyethylene fibers, Zylon fibers, and boron fibers. Examples of resins constituting the fiber-reinforced resin include epoxy resins, phenol resins, polyester resins, polycarbonate resins, and the like.

The resin part 30 may be formed by laminating a plurality of sheet-like fiber-reinforced resins and heating them while applying pressure, or may be formed by uni-directional (UD) in which reinforcing fibers are aligned in one direction and impregnated with resin. Layers of prepreg may be included in the laminate. Moreover, in order to disperse the stress, a structure in which a fiber reinforced resin having a fiber direction of 90° and a fiber reinforced resin having a fiber direction of 0° are alternately laminated may be used. A fiber direction of 0° means that the fiber direction is in the toe-heel direction. The fiber direction of 90° means that the fiber direction is in the face-back direction.

The resin part 30 may have other members in addition to the fiber-reinforced resin. Other members include resins that do not have fibers that serve as reinforcing materials.

The metal wire 40 is enclosed in the resin portion 30 so as to be visible from the outside of the golf club head 1 . The metal wire 40 extends in the toe-heel direction. Here, extending in the toe-heel direction means that the metal wire 40 connects an arbitrary point on the toe side and an arbitrary point on the heel side within the crown member 20 . However, although the metal wire 40 is approximately oriented in the direction of _d1 shown in FIG. 1(a), it does not necessarily have to be completely parallel to _d1 .

Examples of the metal wire 40 include crystalline alloys and amorphous alloys, and specific examples thereof include titanium nickel. The cross-sectional shape of the metal wire is, for example, a circular or polygonal shape including an ellipse, and the smallest width of the cross-section is, for example, about 0.1 mm to 2.0 mm.

A plurality of metal wires 40 may be enclosed in the resin portion 30 so as to be visible from the outside of the golf club head 1 . In this case, the plurality of metal wires 40 can be arranged so as to extend in the toe-heel direction. Also, the plurality of metal lines 40 are generally parallel to each other and can be arranged adjacent to each other in the face-back direction.

Here, "substantially parallel" means that the golf club head 1 is grounded on a horizontal plane at the reference lie angle and the reference loft angle, and when viewed from the normal direction of the horizontal plane, the distance between the adjacent metal wires is the maximum value. It means that the difference from the minimum value is within 1 mm. In addition, when viewed from the normal direction of the horizontal plane, each metal wire does not need to be seen in a straight line, and may be seen in a curved line. Alternatively, what looks like a straight line and what looks like a curve may coexist.

The interval P between adjacent metal lines 40 is generally uniform. Here, "substantially uniform" means that the distance between the n-th metal wire 40 and the (n+1)-th metal wire 40 is within an error of ±1 mm regardless of the value of n (n: natural number).

The crown member 20 can be molded into a predetermined shape by, for example, sandwiching a plurality of metal wires to be the metal wires 40 between a plurality of prepregs to be the resin portion 30 and applying pressure while heating. If necessary, the crown member 20 may be painted or the like. Further, if necessary, the entire surface of the crown member 20 may be subjected to a treatment such as polishing or machining.

In this way, by arranging the metal wire 40 in the toe-heel direction in the crown member 20 of the golf club head 1, the crown portion 12 is not prevented from bending or rebounding in the face-back direction when hitting a ball. The strength of the portion 12 can be improved.

It should be noted that arranging the metal wire 40 in the face-back direction in the crown member 20 is not preferable because the metal wire 40 works in a direction that hinders the bending and repulsion of the crown portion 12 when the ball is hit. It is also conceivable to use a metal sheet instead of the metal wire 40, but the metal sheet itself is heavy and causes an increase in the weight of the golf club head 1 as a whole, which is not preferable.

In addition, in the crown member 20 of the golf club head 1, by arranging the metal wire 40 in the toe-heel direction in a state visible from the outside, the metal wire 40 functions as an alignment mark. becomes easier to recognize. That is, when the golf club head 1 is grounded on a horizontal plane at the reference lie angle and the reference loft angle and addressed, the metal wire 40 can be visually recognized by the batter so as to be perpendicular to the direction of the flight line. It is possible to precisely align the golf club head 1 with respect to the flight line direction.

In addition, since the crown portion 12 has an outwardly convex curved surface and the batter holds the golf club head 1 tilted by the lie angle, the metal wire 40 is arranged in the toe-heel direction rather than in the face-back direction. If you do, the batter will be easier to set up.

Although the preferred embodiment has been described in detail above, it is not limited to the above-described embodiment, and various modifications and substitutions can be made to the above-described embodiment without departing from the scope of the claims. can be added.

Reference Signs List 1 golf club head 10 head body member 11 face portion 12 crown portion 13 sole portion 14 side portion 15 hosel portion 20 crown member 30 resin portion 40 metal wire 121 opening 122 stepped portion

Claims (5)

A wood-type golf club head comprising a face portion, a sole portion, and a crown portion,
Having a crown member forming part of the crown portion,
The crown portion has an opening,
The crown member has a first member and a second member, and closes the opening,
The first member is a laminate obtained by laminating a plurality of sheet-shaped fiber reinforced resins,
The plurality of sheet-shaped fiber-reinforced resins are a carbon fiber-reinforced resin sheet in which carbon fibers are aligned in one direction and impregnated with epoxy resin, and a glass fiber-reinforced resin sheet which is a composite material of glass fiber and resin. and including
The second member is made of a metal wire,
The second member is sandwiched between a plurality of sheets of the fiber reinforced resin,
The glass fiber reinforced resin sheet is arranged outside the golf club head relative to the second member, and the carbon fiber reinforced resin sheet is arranged inside the golf club head relative to the second member,
The metal wire is visible from the outside of the golf club head,
The golf club head, wherein the second member extends in a toe-heel direction. The crown member has a plurality of the second members,
2. The golf club head of claim 1, wherein the plurality of second members are generally parallel to each other and are adjacent in a face-back direction. 3. The golf club head of claim 2, wherein the spacing between adjacent second members is substantially uniform. The golf club head according to any one of claims 1 to 3, wherein the cross-sectional shape of the metal wire is circular including an ellipse, and the minimum width is 0.1 mm to 2.0 mm. 5. The golf club head according to any one of claims 1 to 4, wherein the metal wire has ends on a toe side and a heel side, and adjacent metal wires are discontinuous.

Images