JP2006320373A - Golf club head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light-weight golf club of a sufficiently low centroid position, which is a combined head constituted by combining respectively different materials, and for which a face member and a head main body part are joined with sufficiently strong adhesion strength. <P>SOLUTION: By providing the face member having a recessed part for which a part of a side face is recessed toward an inner side area, an abutting surface abutted to the face member and the head main body part projected roughly vertically from the abutting surface and provided with a columnar part corresponding to the recessed part of the face member, and joining the face member and the abutting surface of the head main body part in the state that the recessed part of the face member and the columnar part of the head main body part are fitted, the golf club head is constituted. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a golf club head, and more particularly to a golf club head in which a plate-like face member is bonded to a head main body portion with an adhesive.

  Conventionally, golf club heads have realized a low center of gravity and a large moment of inertia by forming the material of the head main body and the material of the face member from different materials. In such a golf club head, the method of joining the head main body and the face member is particularly important. Conventionally, methods such as welding, “caulking”, and brazing have been used as methods for joining the head main body and the face member. However, when the face member has a laminated structure in which a metal layer and an FRP layer are laminated, a joining method such as welding, “caulking”, or brazing cannot be used because of material characteristics. As described above, a joining method using an adhesive has been conventionally performed for joining the face member and the head main body so that neither welding nor “caulking” nor brazing can be used.

  However, compared with welding methods such as welding, “caulking”, and brazing, bonding with an adhesive material has a weak bonding force between the face member and the head main body. For this reason, sufficient bonding strength can be obtained only by applying an adhesive to the back surface of the plate-like face member (the surface opposite to the hitting surface for hitting the golf ball) and bonding the back surface to the head main body. I can't. As described above, when a golf ball is repeatedly hit using the golf club head bonded only with the adhesive force of the adhesive, the golf club head is damaged at a relatively early stage. This is because the only force that opposes the force in the direction parallel to the face surface is the adhesive force by the adhesive (the bonding force is relatively weak).

Conventionally, in order to solve the problem of insufficient bonding strength (adhesive strength) in bonding using such an adhesive, it has conventionally been compatible with the shape of the face member-type depression provided in the head body. The entire face member is fitted in the hollow portion) (for example, Patent Document 1 below).
Japanese Unexamined Patent Publication No. 7-255484

  FIG. 3 is a schematic perspective view of each member constituting the iron head described in Patent Document 1. The head 100 includes a head main body 101, a face member 103, and a pin body 105. A recess 104 is formed in the face surface 102 of the head body 101, and five pin standing holes 107 are provided in the recess 104. That is, the head body 101 is provided with a protruding portion 108 that surrounds the entire plate-like face member 103. Further, the face member 103 is provided with a pin hole 106 so as to coincide with the position of the pin standing hole 107 when the face member 103 is fitted into the recess 104. In the method of manufacturing an iron head described in Patent Document 1, a pin body 105 is inserted into a pin erecting hole 107 provided in a recess 104 and bonded and fixed in an erect state. Then, the pin body 105 is inserted and penetrated into the pin hole 106 of the face member 103 and is fitted in the recess 104. Finally, the pin body 105 protruding from the face member 103 is caulked to join the head body 101 and the face member 103 together.

  In the conventional golf club head bonded using an adhesive, a recess is formed in the head main body as described above. In other words, the head main body is provided with a protrusion (protrusion 108 in FIG. 3) that is integrated with the head main body and surrounds the entire plate-like face member. In a conventional golf club head bonded using an adhesive, a force applied to the face member (particularly, a force in a direction parallel to the face surface of the face member) is physically received by the protrusion. That is, the conventional golf club head eliminates the need to resist the force applied to the face surface only by the adhesive by the projecting portion surrounding the entire plate-like face member, and improves the durability of the golf club head. I was letting.

  However, for example, in today's iron golf club heads, the specific gravity of the material of the head main body is generally larger than the specific gravity of the material of the face member. In this way, when the specific gravity of the material of the head main body is relatively large, if the head main body is provided with a protruding portion (same material as the head main body) surrounding the entire periphery of the face member, the weight of the entire head is There was a problem of becoming relatively large. In particular, the center of gravity of the head becomes relatively high (relatively close to the top side) due to the weight of the portion surrounding the top side of the face member in the protruding portion. . In the conventional bonding method using an adhesive, a golf club head having sufficient bonding strength and sufficiently light weight and having a low center of gravity cannot be produced.

  Accordingly, the present invention provides a golf club head constructed by joining a face member and a head main body made of different materials with an adhesive, having a sufficient bonding strength, being sufficiently lightweight and having a low center of gravity. Provide a golf club head in position.

  In order to solve the above-mentioned problems, the present invention provides a golf club head composed of a face member and a head main body, wherein the face member is a plate-like member and is used for hitting a golf ball. A face, a face opposite to the striking face, and a side face that is substantially perpendicular to the striking face and the opposite face surrounding the striking face and the opposite face. A part of the side surface has a recess recessed toward the inner region of the striking surface, and the head main body includes a contact surface that contacts at least a part of the opposite surface of the face member; A columnar portion corresponding to the concave portion of the face member and projecting substantially perpendicularly from the contact surface, and the concave portion of the face member and the columnar portion of the head main body portion are fitted, The opposite side of the face member A surface, said contact surface of the head body portion to provide a golf club head, characterized in that it is joined.

  Further, it is preferable that at least a part of a contact portion of the face member and the head main body is joined by an adhesive.

Further, it is preferable that at least a part of the entire face member is opened except for a portion corresponding to the concave portion of the entire side surface. Moreover, it is preferable that the area | region where the said side surface is open | released contains the area | region corresponding to the top part of the said golf club head at least.
In the present invention, that the side surface of the face member is open refers to a state where the side surface of the face member is not in contact with the head main body. That is, in the portion where the side surface of the face member is open, the head main body portion does not have a protruding portion (columnar portion or wall portion) protruding from the contact surface of the head main body portion.

  Moreover, it is preferable that the face member is provided with at least one concave portion at a position corresponding to a first curved portion from the top side to the toe side of the golf club head. Further, the face member includes a first curved portion from the top side to the toe side of the golf club head, a second curved portion from the toe side to the sole side, and a third curved portion from the heel side to the top side. It is preferable that at least one recess is provided at each of the positions corresponding to the three curved portions.

  The head main body portion includes a wall portion that protrudes substantially perpendicularly from the contact surface over the entire region corresponding to the sole portion of the golf club head, and the face member corresponds to the sole portion on the side surface. It is preferable that the entire region to be touched and fixed to the wall portion of the head main body portion.

  The golf club head of the present invention has a particularly favorable effect in a golf club head in which the specific gravity of the face member is smaller than the specific gravity of the head main body.

  The golf club head is a hollow golf club head, and the contact surface of the head main body portion preferably contacts only the peripheral portion of the opposite surface of the face member.

  Of the face members, at least a hitting portion that hits the golf ball preferably has a laminated structure in which a metal layer and a fiber-reinforced plastic layer are laminated. The metal constituting the metal layer is preferably titanium.

  The golf club head of the present invention is a composite head composed of a combination of different materials such as FRP and titanium, wherein the face member and the head main body are joined with a sufficiently strong joining strength, are lightweight, and have a center of gravity position. Is low enough.

  Hereinafter, the golf club head of the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.

  FIG. 1 is a diagram for explaining each member constituting an iron golf club head 10 (hereinafter referred to as club head 10), which is an example of the golf club head of the present invention. It is a schematic perspective view. FIGS. 2A to 2C are diagrams illustrating the iron golf club head 10 (club head 10). 2A is a view (side view) of the club head 10 viewed from the toe side, and FIG. 2B is a view (front view) of the club head 10 viewed from the face side. FIG. 2C is a cross-sectional view of the club head 10 viewed from the toe side by cutting the club head 10 along the line A-A ′ shown in FIG. The club head 10 is composed of a plate-like face member 14 and a head main body 12 and is a hollow iron club head in which a hollow portion 11 is provided. The face member 12 has a laminated structure in which a metal layer 13 and a fiber reinforced plastic (FRP) layer 19 are laminated in the thickness direction. In FIG. 2C, the face member 12 has a three-layer structure in which the fiber reinforced plastic layer 19 is sandwiched between the metal layers 13, but the number of metal layers and fiber layers stacked is not limited. The metal layer 13 of the face member 12 is a metal whose main component is titanium. The head body 12 is made of a material such as soft iron, for example. The specific gravity of the head main body 12 is larger than the specific gravity of the face member 12. The metal layer of the face member 12 and the material of the face member need not be titanium or soft iron, and are not particularly limited.

  The face member 14 is a plate-like member, and is substantially perpendicular to the striking surface 16 for striking the golf ball, the surface (adhesion surface) 18 opposite to the striking surface 16, the striking surface 16 and the adhesion surface 18. And a side surface (peripheral surface) 17. In the face member 14, the peripheral portion of the bonding surface 18 is in contact with the head main body 12, and the contact portion is bonded to the head main body 12 by an adhesive.

  The face member 14 has a recessed portion 20 (recessed portions 20 a to 20 c) in which a part of the peripheral surface 17 of the face member 14 is recessed substantially hemispherically toward the inner region of the face member 14. The contour shape of the face member 14 viewed from the striking surface 16 side is recessed corresponding to the recessed portion.

  The head main body 12 has a contact surface 22 that contacts the adhesive surface 18 of the face member 14, and has columnar portions 24 (columnar portions 24 a to 24 c) that protrude substantially perpendicularly from the contact surface 22. ing. The columnar portion 24 a is integrated with the head main body portion 12. That is, the head main body portion 12 is formed of the same material at a portion including the contact surface 22 and the columnar portion 24. The specific gravity of this material is larger than the specific gravity of the face member 14. These columnar portions 24 are provided at positions corresponding to the concave portions 20 of the face member 14 when the bonding surface 18 and the contact surface 22 of the face member 14 are joined. The columnar portion 24 has a shape that fits with the concave portion 20 of the face member 14 when the bonding surface 18 and the contact surface 22 of the face member 14 are joined. That is, the cross-sectional shape obtained by cutting the columnar portion 24 along a surface substantially parallel to the striking surface 16 in a state where the adhesive surface 18 and the contact surface 22 of the face member 14 are joined is directed toward the center of the striking surface 16. It has a convex substantially hemispherical shape. The club head 10 is configured such that the columnar portion 24 of the head main body portion 12 and the concave portion 20 of the face member 14 are fitted (engaged), and the contact portion and the fitting portion are bonded and bonded with an adhesive. Yes. Further, the head main body 12 is provided with a wall portion 26 protruding from the contact surface 22 so as to cover the entire sole side and heel side of the face member 14.

  The recess 20 is provided in three places on the face member 14, and similarly, the columnar part 24 is provided in three places in the head main body 12. The contour shape of the face member viewed from the striking surface 16 side, that is, the shape of the striking surface 16 is surrounded by four sides corresponding to the top side edge 15s, the toe side edge 15t, the sole side edge 15u, and the heel side edge 15v. In addition, it has a substantially quadrangular shape (see FIG. 2). The contour shape of the face member 14 has four large curved portions corresponding to the four corners of the substantially quadrilateral shape. The recesses 20a to 20c are provided one by one at each of the positions corresponding to the three curved portions of the four substantially quadrangular curved portions. The three curved portions are respectively a first curved portion 30a extending from the top side edge to the toe side edge, a second curved portion 30b extending from the toe side edge to the sole side edge, and the heel side edge 15v to the top side. The third curved portion 30c reaches the edge 15s. Of the three columnar portions 24 (24a to 24c) of the head main body 12, the columnar portion 24b provided at a position corresponding to the second curved portion 30b and a position corresponding to the third curved portion 30c are provided. The columnar portion 24 c thus formed is integrated with the wall portion 26. The wall portion 26 is located at a position corresponding to the fourth curved portion 30d from the sole side edge 15u to the heel side edge 15v of the head main body portion 12.

  As described above, in the club head 10, the concave portions 20 a to 20 c formed in the face member 14 are located in the portions corresponding to the three curved portions of the four substantially quadrangular curved portions 30 a to 30 d. Yes. The head body portion 12 is provided with columnar portions 24a to 24c protruding from the contact surface 22 so as to be fitted to the recesses 20a to 20c, respectively, and further covers the sole side and the heel side of the face member 14 As described above, a wall portion 26 protruding from the contact surface 22 is provided. With such a configuration, even if a force is applied to the face member 14 of the club head 10, if this force is a force in a direction substantially parallel to the striking surface 16, at least one of the columnar portions 24a to 24c, or the wall The portion 26 can physically hold the face member 16 to be moved by this force. That is, even when a force in a direction substantially parallel to the striking surface 16 is applied to the face member 14, a large force is not applied to the adhesive itself in the bonded state, and at least one of the columnar portions 24a to 24c, Alternatively, this force can be received by a physical force from the wall portion 26.

  As is apparent from FIGS. 1 and 2, the portion of the peripheral surface 17 of the face member 14 that is not in contact with the columnar portions 24 a to 24 c or the wall portion 26 is not in contact with the head main body 12 (peripheral surface). 17 is open). In other words, there is no protruding portion protruding from the contact surface 22 of the head main body 12 other than the columnar portions 24 a to 24 c and the wall portion 26. These protruding portions are formed of the material of the head main body having a relatively large specific gravity. For this reason, the head weight of the club head 10 is lighter than that in the case where the protruding portion surrounding the entire face member 14 is provided. Further, in the club head 10, the peripheral surface 17 of the face member 14 is opened particularly at the entire top side edge 15 s and the entire toe side edge 15 t. For this reason, the position of the center of gravity of the club head 10 is lower (relative to the sole side) than a golf club head configured to have a head body portion provided with a protruding portion surrounding the entire face member 14. Is located).

  In the club head 10 of this embodiment, a wall portion 26 protruding from the contact surface 22 is provided so as to cover the entire sole side and heel side of the face member 14. The golf club head of the present invention is not necessarily provided with such a wall portion 26. However, having such a wall portion 26 prevents the face member from being located at the sole portion or the leading edge portion of the club head 10 that often comes into contact with the ground, thereby improving the durability of the golf club head. The effect of improving can be acquired. Further, by providing the wall portion 26 at such a position, it is possible to obtain an effect of increasing the weight ratio in the vicinity of the sole portion and reducing the position of the center of gravity of the golf club head (in the vicinity of the sole side).

  In the golf club head of the present invention, the columnar portions 24 do not need to be provided at three locations. The number of columnar portions (and concave portions) provided in the golf club head of the present invention is not particularly limited. In the club head 10, the contour shapes (contour shapes in the front view) of the columnar portions 24 a to 24 c viewed from the striking surface 16 are all directed toward the center of the striking surface 16 having a substantially quadrangular shape. And convex, almost hemispherical. In the golf club head of the present invention, the shape of the columnar portion (and the concave portion) is not particularly limited. In the golf club head of the present invention, even if an external force in a direction substantially parallel to the face surface of the face member is applied to the face member, a large force is not applied to the adhesive itself in the bonded state. It is only necessary that a convex portion (and a concave portion) is provided so that the convex portion (and the concave portion) can be received, and the shape, number, and arrangement position of the convex portion (and the concave portion) are not particularly limited.

  In the above embodiment, the club head 10 is an iron type golf club head. However, the golf club head of the present invention is not limited to an iron type golf club head, for example, a wood type golf club head. May be.

  The golf club head of the present invention has been described in detail above. However, the present invention is not limited to the above-described embodiments, and various improvements and modifications may be made without departing from the scope of the present invention. It is.

1 is a schematic perspective view of a head main body 12 and a face member 14 constituting an iron golf club head 10 which is an example of a golf club head of the present invention. (A)-(c) is a figure explaining the iron golf club head 10. FIG. It is a schematic perspective view of each member which comprises the conventional iron head.

Explanation of symbols

10 Iron Golf Club Head 12 Head Main Body 14 Face Member 14
15s Top side edge 15t Toe side edge 15u Sole side edge 15v Heel side edge 16 Impact surface 18 Opposite surface (adhesion surface)
17 Side (peripheral surface)
20a-20c Concave part 22 Contact surface 24a-24c Columnar part 26 Wall part 30a-30d Curved part 100 Head 100
101 Head body 101
102 Face surface 103 Face member 104 Recessed portion 105 Pin body 106 Pin hole 107 Pin standing hole 108 Projection

Claims (11)

A golf club head composed of a face member and a head main body,
The face member is a plate-shaped member and surrounds a striking surface for striking a golf ball, a surface opposite to the striking surface, and a periphery of the striking surface and the opposite surface. And a side surface substantially perpendicular to the opposite surface,
The face member has a concave portion in which a part of the side surface is recessed toward the inner region of the hitting surface,
The head main body includes a contact surface that contacts at least a part of the opposite surface of the face member, and a columnar portion that protrudes substantially perpendicularly from the contact surface, corresponding to the recess of the face member. Have
In a state where the concave portion of the face member and the columnar portion of the head main body portion are fitted, the opposite surface of the face member and the contact surface of the head main body portion are joined. A golf club head.   The golf club head according to claim 1, wherein at least a part of a contact portion of the face member and the head main body is joined by an adhesive.   3. The golf club head according to claim 1, wherein at least a part of the face member is open except for a portion corresponding to the concave portion of the entire side surface. 4.   The golf club head according to claim 3, wherein the open side region includes at least a region corresponding to a top portion of the golf club head.   5. The face member is provided with at least one concave portion at a position corresponding to a first curved portion extending from the top side to the toe side of the golf club head. A golf club head according to claim 1.   The face member includes a first curved portion from the top side to the toe side of the golf club head, a second curved portion from the toe side to the sole side, and a third curved portion from the heel side to the top side. The golf club head according to claim 1, wherein at least one concave portion is provided at each of the positions corresponding to the three curved portions. The head body portion includes a wall portion that protrudes substantially perpendicularly from the contact surface over the entire region corresponding to the sole portion of the golf club head,
The whole area of the face member corresponding to the sole portion of the side surface is fixed in contact with the wall portion of the head main body portion. Golf club head.   The golf club head according to claim 1, wherein a specific gravity of the face member is smaller than a specific gravity of the head main body.   9. The golf club head according to claim 1, wherein the golf club head is a hollow golf club head, and a contact surface of the head main body abuts only on a peripheral portion of the opposite surface of the face member. The golf club head according to any one of claims.   10. The golf according to claim 1, wherein at least a hitting portion that hits the golf ball of the face member has a laminated structure in which a metal layer and a fiber reinforced plastic layer are laminated. Club head. The golf club head according to claim 10, wherein the metal constituting the metal layer is titanium.

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