JP2006122544A - Iron golf club head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an iron golf club head which can set an optimal gravity center position without increasing weight, increase a carry, and give a good ball hitting feeling. <P>SOLUTION: The club head is constituted of a head body part 14 made of a metal material integrally formed with a hosel 12, and a lightweight resin member 16 arranged on the top side of the head body part 14. A peripheral part 20 reaching the heel side from the toe side via the sole side of the head body part 14 is formed expanding backward on the back face of the face part of the head body part 14. And, the back face of the face part surrounded by the peripheral part 20 is formed as a recessed part 22. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an iron golf club head having a concave portion on the back surface of a face portion and having a peripheral edge portion of the concave portion formed thick.

  As an iron golf club head, a cavity back type head having a concave portion (cavity) on the back surface of a face portion and having a peripheral edge portion formed thick is known. This cavity back type iron golf club head has an advantage that the moment of inertia of the head can be increased and stable hitting characteristics can be obtained by increasing the weight distribution to the peripheral edge of the cavity. Further, the cavity back type iron club head can improve the resilience characteristics of the head by reducing the thickness of the hitting ball region in the face portion and making it easy to bend.

  However, the cavity back type iron golf club head configured as described above has a problem that the hitting area of the face portion is thin, so that the vibration at the time of hitting is increased and the hitting feeling is lowered. Therefore, in order to improve the feel at impact by absorbing the vibration at the time of hitting, there is one in which a vibration absorbing material is fixed to the back of the face portion (see Patent Documents 1 and 2). In some cases, a fiber reinforced plastic material is attached to the back of the face portion (see Patent Document 3). Furthermore, by forming a slit portion between the back surface of the face portion and the peripheral edge portion of the cavity, and filling the slit portion with an elastic body, it is possible to ensure a suitable weight distribution to the peripheral edge portion of the cavity and the face portion. There is one that can suppress excessive vibration and can expand a suitable hitting area (see Patent Document 4).

JP-A-8-164229 Japanese Patent Laid-Open No. 9-322952 Japanese Examined Patent Publication No. 4-65708 JP-A-11-104283

  However, in the conventional cavity back type iron golf club head, a large amount of weight is distributed to the top side, which is the top of the head, and the center of gravity of the head is set low to increase the ball launch angle at the time of hitting the ball. There is a limit. Therefore, there is a drawback that it is difficult to increase the flight distance.

  An object of the present invention is to provide an iron golf club head capable of setting a suitable center of gravity position without increasing weight, increasing a flight distance, and obtaining a good shot feeling. .

The present invention provides an iron golf club head having a concave portion on the back surface of the face portion, and having a peripheral edge portion of the concave portion formed thick.
Among the peripheral portions, at least a part on the top side is constituted by a resin member, and the resin member is joined to a head main body portion made of a metal material.

  In this case, since at least a part on the top side of the peripheral edge of the recess is made of a lightweight resin member, the center of gravity of the head can be set low, thereby increasing the launch angle of the ball at the time of hitting and the flight distance Can be increased. Moreover, the vibration of the head main body can be suitably absorbed by the resin member, and a good shot feeling can be obtained.

  The weight reduced by providing the resin member can be distributed as a back weight member made of a metal material having a specific gravity larger than that of the metal material constituting the head main body portion, on the rear side on the sole side of the peripheral portion of the recess. . As a result, the center of gravity of the head is set to the lower rear and a stable swing is possible. In addition, the resin member arrange | positioned at the peripheral part of a head main-body part can be formed in cyclic | annular form, and a back weight member can be arrange | positioned through an annular resin member.

  Also, a slit portion is formed between the sole side portion of the peripheral portion and the back surface of the face portion, and a vibration absorbing material is disposed in the slit portion, so that the vibration of the face portion having the concave portion can be absorbed. A hitting feeling can be obtained, and a suitable hitting area can be enlarged.

  Further, an iron golf club head capable of obtaining a sufficient flight distance is obtained by forming a face portion by joining a face member made of a metal material having a higher tensile strength than the metal material constituting the head main body portion to the head main body portion. be able to.

  According to the iron golf club head of the present invention, the center of gravity of the head can be lowered to increase the flight distance, and the vibration of the head main body can be absorbed to obtain a good shot feeling.

  1 to 4 are views showing an iron golf club head 10 according to a first embodiment. FIG. 1 is an exploded perspective view, FIG. 2 is a front view seen from the face side, FIG. 3 is a rear view, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.

  The iron golf club head 10 is basically composed of a head main body portion 14 made of a metal material in which the hosel 12 is integrally formed, and a resin member 16 disposed on the top side of the head main body portion 14.

  The head main body portion 14 has a face portion 18 that forms a ball striking surface, and the back surface of the face portion 18 extends from the toe side of the head main body portion 14 to the heel side via the sole side as shown in FIG. The peripheral edge 20 is formed to bulge backward. Then, the back surface of the face portion 18 surrounded by the peripheral edge portion 20 is formed as the concave portion 22. As shown in FIG. 4, a convex portion 24 is formed along the upper end portion of the face portion 18 at a portion from the top side of the head main body portion 14 to the upper portion of the toe.

  The resin member 16 disposed on the top side of the head main body portion 14 has a groove portion 26 that engages with the convex portion 24. The resin member 16 is molded from a resin material reinforced with fibers such as carbon fiber, glass fiber, and aramid fiber, specifically, BMC (bulk mold compound), and the convex part 24 of the head main body part 14 is provided with a groove part 26. And are joined by adhesion.

  When the iron golf club head 10 is configured as described above, since the top side of the head main body portion 14 is made of the lightweight resin member 16, the position of the center of gravity can be lowered. As a result, the flight distance can be increased by increasing the ball launch angle at the time of hitting. Further, if the weight corresponding to the weight reduction of the head main body 14 by using the resin member 16 is distributed to the peripheral edge 20 on the sole side, the position of the center of gravity can be further lowered. Further, by distributing the weight reduced by the resin member 16 to the rear side of the peripheral edge portion 20 on the sole side, the iron golf club head capable of performing a stable swing by setting the center of gravity position low and rearward. 10 can be used.

  Moreover, since the concave part 22 is formed in the back surface of the face part 18, the iron golf club head 10 is easy to bend, the rebound characteristic can be improved, and it can contribute to the increase in a flight distance. In this case, since the resin member 16 bonded to the upper portion of the face portion 18 suitably absorbs the vibration of the face portion 18, excessive vibration of the face portion 18 is suppressed, and the effect of improving the shot feeling is also brought about. Is done.

  Note that the bonding structure of the resin member 16 to the head main body portion 14 is not limited to the engagement structure of the convex portion 24 and the groove portion 26 as long as the resin member 16 does not easily fall off. Moreover, since it is joining of a fiber reinforced resin material and a metal material, although it is fundamentally based on adhesion | attachment, you may use together connection means, such as a screw. When screwing, if a lightweight resin screw is used, the weight on the top side does not increase. Furthermore, the resin member 16 has a shape extending from the top side to the top of the tow, but is not limited thereto, and may be any material that forms at least a part of the top side of the peripheral edge portion 20.

  The head body portion 14 integrally forms the hosel 12 and the face portion 18, but the hosel 12, the face portion 18 and the peripheral edge portion 20 are formed separately, and these members are welded, brazed, and bonded. It can also be configured to be connected by screwing or the like.

  5-7 is a figure which shows the iron golf club head 30 which concerns on 2nd Embodiment, FIG. 5 is a disassembled perspective view, FIG. 6 is a rear view, FIG. 7 is the VII-VII sectional view taken on the line in FIG. is there.

  The iron golf club head 30 includes a head main body portion 34 made of a metal material integrally formed with a hosel 32 and a face member made of a metal material attached to a peripheral portion 36 of an opening 35 formed in the head main body portion 34. 38, an annular resin member 40 mounted on the back side of the peripheral portion 36 of the head main body 34, and a backweight member 42 made of a metal material mounted on the rear side of the sole side of the resin member 40. Composed.

  A wall 46 having a notch 44 at the center is formed on the back side of the sole 36 of the peripheral edge 36 constituting the head main body 34, and between this wall 46 and the peripheral edge 36 is formed. A slit 50 filled with a vibration absorbing material 48 (see FIG. 7) made of a resin material is formed.

  The resin member 40 has an opening 52, and a bulging portion 54 is formed at a portion corresponding to the notch 44 formed in the peripheral edge 36 of the head main body 34. Further, screw holes 58 a and 58 b into which screw members 56 a and 56 b for connecting the back weight member 42 to the resin member 40 are screwed are formed on both sides of the bulging portion 54.

  The back weight member 42 includes screw holes 60 a and 60 b corresponding to the screw holes 58 a and 58 b of the resin member 40.

  Stainless steel is used for the head main body 34, and alloy steel having a higher tensile strength than stainless steel is used for the face member 38 joined to the peripheral edge 36 of the opening 35 of the head main body 34 by welding or the like. The The back weight member 42 is made of a metal material having a specific gravity larger than that of the metal material of the head main body 34, for example, a high specific gravity tungsten alloy. The resin member 40 is molded from a BMC material. A resin material is used for the vibration absorbing material 48. An elastomer material can be used as the resin material. Examples of the elastomer material or the resin material include polyurethane, polyester, polyamide, and silicone.

  The face member 38 is joined to the peripheral edge 36 of the head main body 34 by welding or the like from the front side. The resin member 40 is joined to the peripheral edge 36 of the head main body 34 from the back side by fitting, bonding, or the like. In this case, the bulging portion 54 of the resin member 40 engages with the cutout portion 44 of the peripheral edge portion 36, so that a part of the face member 38 and the wall portion 46 and the bulging portion 54 is made of a resin material. A slit portion 50 is formed. The slit portion 50 is filled with a vibration absorbing material 48. Further, the back weight member 42 is fixed to the rear side of the resin member 40 on the sole side by using the screw members 56a and 56b. The back weight member 42 may be bonded to the resin member 40.

  When the iron golf club head 30 is configured as described above, the position of the center of gravity is lowered by the back weight member 42 attached to the sole side of the resin member 40, and the flight distance is increased by increasing the ball launch angle at the time of hitting the ball. Can be made. The back weight member 42 is fixed to the resin member 40 in a detachable state by screw members 56a and 56b, and the weight can be arbitrarily adjusted by replacement. Further, the resin member 40 disposed on the back side of the head main body 34 and the vibration absorbing material 48 filled in the slit 50 absorb the excessive vibration of the face member 38 to obtain a good shot feeling. be able to. Furthermore, by forming the slit portion 50 on the back surface of the face member 38, it is possible to obtain an effect that a suitable hitting area in the face member 38 is enlarged.

  In the iron golf club head 10 according to the first embodiment, a slit portion is formed in a portion on the sole side on the concave portion 22 side of the peripheral edge portion 20, and vibration is performed as in the case of the iron golf club head 30 according to the second embodiment. You may make it fill with an absorber.

  As an example of the iron golf club head 30 of the second embodiment, a 5-iron iron golf club head 30 was produced. The head main body 34 was made of stainless steel, the face member 38 was made of high strength alloy steel, the resin member 40 was made of BMC material, and the back weight member 42 was made of tungsten alloy. The weight of the backweight member 42 can be increased by a part of the iron golf club head 30 constituted by the lightweight resin member 40, and can be about 75 g. The vibration absorbing material 48 was formed from a silicone resin material. The iron golf club head 30 of this embodiment has a center of gravity height of 17.2 mm from the bottom of the sole and a center of gravity depth of 6.1 mm, which is the distance from the front of the face member 38 to the center of gravity. Compared to a normal iron golf club head that does not have, low center of gravity and deep center of gravity can be achieved.

1 is an exploded perspective view of an iron golf club head according to a first embodiment. It is the front view which looked at the iron golf club head concerning a 1st embodiment from the face side. It is a rear view of the iron golf club head concerning a 1st embodiment. FIG. 4 is a cross-sectional view of the iron golf club head 10 shown in FIG. 2 taken along the line IV-IV. It is a disassembled perspective view of the iron golf club head which concerns on 2nd Embodiment. It is a rear view of the iron golf club head concerning a 2nd embodiment. It is the VII-VII sectional view taken on the line of the iron golf club head shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 30 ... Iron golf club head 14, 34 ... Head main-body part 16, 40 ... Resin member 18 ... Face part 20, 36 ... Peripheral part 22 ... Recessed part 38 ... Face member 42 ... Backweight member 48 ... Vibration absorber 50 ... Slit part 54 ... bulge part

Claims (5)

In an iron golf club head having a concave portion on the back surface of the face portion, and forming a peripheral edge portion of the concave portion thickly,
An iron golf club head characterized in that at least a part on the top side of the peripheral portion is made of a resin member, and the resin member is joined to a head main body portion made of a metal material. The iron golf club head according to claim 1,
A back weight member made of a metal material having a specific gravity greater than that of the metal material constituting the head main body is joined to the rear side of the peripheral edge on the sole side. The iron golf club head according to claim 2,
An iron golf club head, wherein the peripheral portion is formed of the annular resin member. In the iron golf club head according to any one of claims 1 to 3,
An iron golf club head, wherein a slit portion is formed between a portion on the sole side of the peripheral portion and a back surface of the face portion, and a vibration absorbing material is disposed in the slit portion. In the iron golf club head according to any one of claims 1 to 4,
An iron golf club head, wherein a face member made of a metal material having a higher tensile strength than the metal material constituting the head body portion is joined to the head body portion.

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