JP2006305100A - Golf club head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club head which not only secures a sufficient yardage of a ball but also improves its hitting touch. <P>SOLUTION: With regard to the golf club head in the claim 1, the crown part of the body of the head comprising a hollow outer shell body made of a metal is provided with a shaft insertion hole which a shaft penetrate without contact with the crown part while the heel part is provided with a shaft lock part having a bottomed shaft locking hole through a link part being isolated from other parts of the body of the head except for the heel part. As for the claim 2, in the golf club head described in the claim 1, the link part is formed on the rear side of the head body from the outer rim on the face side of the shaft lock part. As for the claim 3, in the golf head described in the claim 1 or 2, the link body is provided with a hollow part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a golf club head that secures a sufficient flight distance of a ball and also improves the hit feeling.

  As disclosed in Patent Document 1, conventionally, when a shaft is fastened to a head body made of a hollow outer shell made of a metal material such as titanium or stainless steel, a crown portion ( A substantially cylindrical shaft fastening part (hosel part) with a shaft fastening hole opening from the top part) to the sole part is integrally formed, and the shaft is inserted into the shaft insertion hole and fixed with an adhesive. ing.

  However, if the shaft fastening part is connected to the crown part and the sole part of the head body in this way, the rigidity of the crown part and the sole part around the shaft fastening part increases, and the sweet spot is removed and the heel side is removed. It has been pointed out that when the ball is hit, the head main body is difficult to bend and the repulsive force is lowered, the flight distance is not increased, and the hit feeling becomes harder than when hit with a sweet spot.

  Further, in Patent Document 2, a shaft insertion hole 5 is provided in the crown portion 3 of the hollow head body 1 as shown in FIGS. A golf club head 11 in which a cylindrical shaft tip support member 7 is integrally provided on a sole portion 9 is disclosed. Further, Patent Document 3 discloses a crown portion of a hollow head main body 13 as shown in FIGS. 15 is provided with a through hole 17 for inserting a shaft, and a shaft fastening portion (hosel portion) 21 is joined to the back side of the face portion 19 via a connecting member 23, and the shaft fastening portion 21 is inserted into the through hole 17. A golf club head 25 that is not in contact with the crown portion 15 is disclosed.

Thus, according to these golf club heads 11 and 25, the crown portions 3 and 15, the shaft tip support member 7, and the shaft fastening portion 21 are separated from each other. The rigid structure which joined the hosel part to the crown part will be avoided.
Japanese Patent Laid-Open No. 10-295857 Japanese Patent Laid-Open No. 10-1227827 JP 2001-309998 A

  However, the golf club head 11 shown in FIGS. 10 and 11 has a structure in which the shaft tip support member 7 is provided in the sole portion 9 facing the shaft insertion hole 5, so that the sole portion 9 around the shaft tip support member 7 has a structure. Therefore, there is a drawback that when the ball is hit, the peripheral portion is difficult to bend, and when the ball is hit on the heel side with the sweet spot removed, the flight distance does not increase and the hit feeling is still hard.

Further, the golf club head 25 of FIGS. 12 and 13 has a structure in which the shaft fastening portion 21 is joined to the back surface side of the face portion 19 via the connecting member 23, so that the resilience of the face portion 19 is reduced and the flight distance is reduced. It has been pointed out that it does not grow.
The present invention has been devised in view of such circumstances, and an object of the present invention is to provide a golf club head that secures a sufficient flight distance of the ball and also improves the hit feeling.

  In order to achieve such an object, a golf club head according to a first aspect of the present invention has a shaft insertion hole through which a shaft penetrates a crown portion of a head body made of a metal hollow outer shell in a non-contact manner with the crown portion. And a shaft fastening portion having a bottomed shaft fastening hole is provided apart from other portions of the head main body excluding the heel portion, and provided on the heel portion via a connecting portion.

  According to a second aspect of the present invention, in the golf club head according to the first aspect, the connecting portion is formed on the back side of the head body from the outer edge on the face side of the shaft fastening portion. The invention according to claim 3 is characterized in that in the golf club head according to claim 1 or 2, a hollow portion is provided in the connecting portion.

According to the first aspect of the present invention, even when the sweet spot is removed and the ball is hit on the heel side of the golf club head, the heel side is sufficiently bent as compared with the conventional golf club head, and a large repulsive force is obtained. As a result, a sufficient flight distance can be secured and a soft feel can be obtained.
According to the second aspect of the present invention, it is possible to make the periphery of the face portion of the golf club head easier to bend, and according to the third aspect of the invention, by providing the connecting portion with a hollow portion. In addition, the rigidity of the heel portion is lowered, the periphery of the face portion is easily bent, and the golf club head can be reduced in weight.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a golf club using a golf club head according to an embodiment of the present invention (hereinafter referred to as “head”). A head 33 is attached to the tip of a shaft 31 formed of fiber reinforced resin or metal. A golf club 35 is formed by attaching a grip (not shown) to the rear end side of the shaft 31.

The lie angle θ is set by the shaft axis P, the head 33 is arranged at a predetermined lie angle θ, and a horizontal plane in contact with the head 33 is defined as a horizontal reference plane 36.
Thus, as shown in FIG. 2, the head 33 has a crown portion 41, a face portion 43, a side portion 45, and a sole portion 47 which are made of titanium except for the face side opening portion 37 shown in FIG. And a head body 49 made of a hollow outer shell integrally cast of titanium alloy, and a face plate 51 attached to the face side opening 37. The face plate 51 is made of stainless alloy, titanium alloy or the like. A metal material is formed by plastic working (rolling or press forming).

The face portion 43 of the head main body 49 and the face plate 51 constitute the face portion of the head 33. As shown in FIG. 2, the head 33 has a longer toe and heel direction than the top and sole directions. The shape is low and wide.
The head main body 49 according to the present embodiment has a face portion 43 partitioned from the crown portion 41, the side portion 45, and the sole portion 47 by the top edge 53 and the leading edge 55 shown in FIG. The side portion 45 and the sole portion 47 are partitioned by an edge 57 shown in FIG. 5, but the edge is a so-called “border”, for example, R on the outer surface of the sole portion and R smaller than R on the outer surface of the side portion. The center part which a side part connects is said, and a ridgeline is usually visually recognizable.

  As shown in FIGS. 4 and 5, a shaft insertion hole 39 having a circular shape in plan view through which the shaft 31 penetrates without being in contact with the crown portion 41 is formed on the heel side of the crown portion 41, and the head main body 49. A cylindrical shaft fastening portion 61 having a shaft fastening hole 59 having the same axis as that of the shaft insertion hole 39 is connected to the heel portion 63 of the head main body 49 (side portion 45). The shaft fastening portion 61 is structured to be separated from other portions except the heel portion 63. The shaft 31 penetrating the shaft insertion hole 37 is inserted into the shaft fixing hole 59 and fixed with an adhesive such as epoxy resin.

  As described above, the head main body 49 according to the present embodiment has the side portion 45 and the sole portion 47 defined by the edge 57, so that the heel portion 63 of the head main body 49 is located on the side portion 45. However, as disclosed in, for example, Patent Document 1, there is no head between the head body that is formed in a substantially oval shape as a whole, or between the side portion and the sole portion, and the curved sole portion rises upward to form the crown portion. In the connected head body, the heel portion is positioned at the sole portion. In this specification, the heel portion of the head body is the toe side of the head body across the shaft axis (P in FIG. 1). The heel side in the opposite direction.

  As shown in FIGS. 5 and 6, the shaft fastening portion 61 has a uniform thickness and a peripheral wall and a bottom portion, and the top and bottom thereof are not in contact with the crown portion 41 and the sole portion 47, and the shaft fastening portion Since 61 is not in contact with the face portion 43, the heel side of the head 33 (the heel side of the crown portion 41 and the sole portion 47 and the face portion 43) is easily bent at the time of hitting, and a sufficient ball repulsive force can be obtained. .

  On the other hand, as shown in FIG. 5, the connecting portion 65 is integrally formed between the shaft fixing portion 61 and the heel portion 63, but the connecting portion 65 is higher than the entire length L of the shaft fixing portion 61. The upper portion 67 of the shaft fixing portion 61 protrudes from above the connecting portion 65, and the upper portion 69 and the bottom portion 71 of the connecting portion 65 are the axis of the shaft fixing portion 61 (in FIG. The bottom portion 71 is formed flush with the bottom portion 73 of the shaft fastening portion 61 and is connected to the heel portion 63 above the edge 57.

Further, as shown in FIG. 6, the connecting portion 65 is formed with the same width M as the outer diameter of the shaft fixing portion 61, and the connecting portion 65 is not located on the face side from the face side outer edge of the shaft fixing portion 61. Thus, the head body 49 is formed along the toe and heel directions.
The connecting portion 65 is manufactured by a lost wax manufacturing method using a plurality of cores when the head main body 49 is formed.

A resin socket 75 is attached to the shaft 33 that passes through the shaft insertion hole 39 in a non-contact manner, and the shaft insertion hole 39 is closed by the socket 75.
Since the head 33 according to the present embodiment is configured as described above, when the ball is hit with the golf club 35 to which the head 33 is mounted, the ball flies by the impact, but the shaft fixing portion 61 is connected. The shaft fixing part 61 is attached to the heel part 65 of the side part 45 via the part 65, and the upper and lower parts thereof are not in contact with the crown part 41 and the sole part 47 and are not in contact with the face part 43. Since the structure is not in direct contact with the crown portion 41, the rigid structure on the heel side of the head 33 (the heel side of the crown portion 41, the sole portion 47, and the face portion 43) is eliminated as compared with the conventional case, and the heel of the head 33 at the time of hitting the ball. The side becomes easy to bend.

For this reason, even if the sweet spot is removed and the ball is hit on the heel side, the heel side of the head 33 is sufficiently bent and a large repulsive force is obtained as compared with the conventional head, and the hit feeling is also soft. .
Furthermore, as shown in FIG. 5, the connecting portion 65 is set to be shorter than the total length L of the shaft fixing portion 61, and the upper portion 67 of the shaft fixing portion 61 is protruded from above the connecting portion 65. When 31 is bent, stress concentration at the connecting portion with the shaft fixing portion 61 is prevented.

Therefore, according to the present embodiment, even when the sweet spot is removed and the ball is hit on the heel side, it is possible to secure a sufficient flight distance and obtain a soft hit feeling compared to the conventional case. became.
Further, as described above, stress concentration at the connecting portion with the shaft fixing portion 61 is prevented at the time of hitting the ball, so that the shaft 31 can be prevented from being damaged.

  In the above embodiment, as shown in FIG. 6, the connecting portion 65 is formed with the same width M as the outer diameter of the shaft fixing portion 61, and the connecting portion 65 is located on the face side from the outer edge of the shaft fixing portion 61 on the face side. This is formed along the toe and heel directions of the head main body 49 so as not to be positioned at the position of the shaft. However, as in the first embodiment of FIGS. 1 and 2 shown in FIG. The connecting portion 65-1 is connected to the rear portion of the side portion 45 with the same width as the outer diameter of the shaft fixing portion 61, or the second embodiment shown in FIG. As described above, the connecting portion 65-2 narrower than the outer diameter of the shaft fixing portion 61 may be formed so as to be further separated from the face side than the connecting portion 65.

Thus, as compared with the embodiment of FIG. 1, the connecting portions 65-1 and 65-2 are formed on the back side of the head main bodies 49-1 and 49-2 from the outer peripheral edge of the shaft fixing portion 61. Then, it becomes possible to make the periphery of the face portions of the heads 33-1 and 33-2 easier to bend.
In particular, the connecting portion 65-1 is excellent in terms of strength at the same time. The reason is that, compared with the embodiment of FIG. 1, the angle difference between the hitting ball load direction (perpendicular to the face) and the hosel connection direction is small, so the bending moment to the connection portion 65-1 is small. is there.

FIG. 9 shows an embodiment of claims 1 and 3. A head 33-3 according to this embodiment is a connecting portion 65 formed on a head body 49-3 instead of the connecting portion 65 of FIG. -3 is provided with a cavity 77, and the other configuration is the same as that of the embodiment of FIG.
Thus, according to the present embodiment, as in the embodiment of FIG. 1, the intended purpose can be achieved, and the cavity portion 77 is provided in the connecting portion 65-3, so that the implementation of FIG. Compared to the form, the rigidity of the heel portion 63 is reduced, and at the same time, the head 33-3 can be reduced in weight.

  When there are two or more connecting parts such as the connecting part 65-3, the connecting part on the sole side is larger than the connecting part on the crown side (for example, the wall thickness is increased) against the strength load. The balance of strength is excellent, and at the same time, the balance of deflection around the face is improved because the connecting portion on the crown side close to the face is small because of the loft.

1 is a front view of a golf club using a head according to one embodiment of the present invention. It is a front view of the head concerning one embodiment of Claim 1. FIG. 3 is a side view of the head shown in FIG. 2. It is the IV-IV sectional view taken on the line of FIG. FIG. 3 is an enlarged cross-sectional view of a main part of the head shown in FIG. 2. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. FIG. 3 is an enlarged cross-sectional view of a main part of the head according to the first embodiment of claim 1 and claim 2. It is a principal part expanded sectional view of the head which concerns on 2nd embodiment of Claim 1 and Claim 2. FIG. 4 is an enlarged cross-sectional view of a main part of a head according to an embodiment of claims 1 and 3. It is sectional drawing of the conventional head. It is sectional drawing of the conventional head. It is a front view of the other conventional head. FIG. 13 is a partially cutaway plan view of the head shown in FIG. 12.

Explanation of symbols

31 Shaft 33, 33-1, 33-2, 33-3 Head 35 Golf club 37 Face side opening 39 Shaft insertion hole 41 Crown part 43 Face part 45 Side part 47 Sole parts 49, 49-1, 49-2, 49-3 head body 51 face plate 53 top edge 55 leading edge 57 edge 59 shaft fastening hole 61 shaft fastening portion 63 heel portions 65, 65-1, 65-2, 65-3 connecting portion 75 socket

Claims (3)

  In the crown portion of the head body made of a metal hollow outer shell, a shaft insertion hole through which the shaft passes without contacting the crown portion is provided, and a shaft fastening portion having a bottomed shaft fastening hole is provided. A golf club head characterized in that the golf club head is provided apart from other portions of the head main body excluding the heel portion through a connecting portion.   2. The golf club head according to claim 1, wherein the connecting portion is formed on the back side of the head main body from the face side outer edge of the shaft fixing portion. The golf club head according to claim 1, wherein a hollow portion is provided in the connecting portion.

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