JP6267540B2 - Golf club head - Google Patents

Description

  The present invention relates to a golf club head that can exhibit high resilience performance.

  The following Patent Document 1 discloses a golf club head having a hollow portion therein. This golf club head includes a face portion and a sole portion, and the face side of the sole portion is composed of a metal material and an elastomer material surrounded by the metal material. In this golf club head, when the ball is hit, the elastomer material is compressed, the face portion is effectively bent, and a large resilience performance is obtained.

  Patent Documents 2 and 3 below disclose golf club heads having a hollow portion therein. These golf club heads have a groove-like portion on the face side of the sole portion. Since the groove-like portion has a small rigidity, the face portion is effectively bent due to the deformation of the groove-like portion of the sole portion when a ball is hit, and a large resilience performance is obtained.

  However, the golf club head of Patent Document 1 has a problem that the elastomer is easily peeled off from the golf club head due to an impact at the time of hitting the ball.

  Further, the golf club heads of Patent Documents 2 and 3 have a problem that sufficient improvement in resilience performance cannot be expected.

U.S. Pat. No. 8,328,659 US Pat. No. 8,235,844 U.S. Pat. No. 8,430,763

  The main object of the present invention is to provide a golf club head having high resilience performance.

  The present invention is a golf club head provided with a hollow portion inside, and includes a face portion having a face for hitting a ball, and a face peripheral region that is continuous with the face portion and extends rearward of the head. A front portion extending from the face side toward the rear of the head and a rear portion ending from the rear of the head toward the face portion are provided at a part of the front portion and the rear portion. The side portion is not fixed to each other, one of the front side portion and the rear side portion is provided with an insertion hole extending in the head front-rear direction, and the other of the front side portion and the rear side portion is The insertion hole is movably inserted in the front-rear direction of the head.

  In the golf club head of the present invention, the insertion hole may be provided in the front portion, and the rear portion may be inserted into the insertion hole.

  In the golf club head of the present invention, the front side portion may include a main portion provided with the insertion hole, and the main portion may include an extension extending rearward of the head.

  In the golf club head of the present invention, the extension portion may include a thick portion that is thicker than the rear portion.

  In the golf club head of the present invention, the thick portion may extend in the toe-heel direction of the head.

  In the golf club head of the present invention, in the longitudinal section of the head including the sweet spot, the thick portion may be located closer to the face portion than the center of gravity of the head.

  In the golf club head of the present invention, the insertion hole includes a tapered hole portion whose vertical width gradually decreases toward the rear of the head, and the rear side portion is relatively at the time of hitting the ball at the face portion. The taper hole can be moved forward from the taper hole, and in a static state, the taper hole can be fitted into the taper hole while being restrained from moving backward in the head.

  In the golf club head of the present invention, the insertion hole may be provided in the rear portion, and the front portion may be inserted into the insertion hole.

  In the golf club head according to the present invention, the rear portion includes a main portion provided with the insertion hole, and the main portion includes an extension extending forward of the head without contacting the front portion. But it ’s okay.

  In the golf club head of the present invention, the extension portion may include a thick portion that is thicker than the front portion.

  In the golf club head of the present invention, the thick portion may extend in the toe-heel direction of the head.

  In the golf club head of the present invention, in the longitudinal section of the head including the sweet spot, the thick portion may be located closer to the face portion than the center of gravity of the head.

  In the golf club head of the present invention, the area around the face is elastically deformed by the force transmitted from the face portion when the ball is hit. On the other hand, since at least a part of the face peripheral area is provided with a front part and a rear part that are not fixed to each other, the face peripheral area has a relative head longitudinal direction between the front part and the rear part. It is elastically deformed more greatly with the deviation. Due to such large elastic deformation of the peripheral area of the face, the face portion is also greatly bent in the front-rear direction, and a large resilience performance can be provided.

  In the golf club head of the present invention, one of the front side portion and the rear side portion of the face peripheral region is provided with an insertion hole extending in the head front-rear direction, and the other of the front side portion and the rear side portion is the front and rear sides of the head. It is inserted in the insertion hole so as to be movable in the direction. Therefore, the golf club head of the present invention can prevent foreign matter from entering the hollow portion as much as possible while providing a large deflection of the face portion.

1 is a perspective view of a golf club head according to an embodiment of the present invention. It is AA fragmentary sectional drawing of FIG. FIG. 3 is a partially enlarged view of the vicinity of a sole portion in FIG. 2. FIG. 2 is a partially cutaway perspective view with a face portion removed from the golf club head of FIG. 1. FIG. 2 is an exploded perspective view of the golf club head of FIG. 1 viewed from the sole side. It is an expanded sectional view near the sole part of the golf club head of other embodiments of the present invention, (A) shows the static state of the head, and (B) shows the state when hitting the ball. . It is sectional drawing of the golf club head of further another embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present specification and drawings, the same or common elements are denoted by the same reference numerals throughout all the embodiments.

  FIG. 1 is a perspective view of a golf club head (hereinafter sometimes simply referred to as “head”) 1 of the present embodiment.

  The head 1 is made of a metal material. As the metal material, for example, stainless steel alloy, maraging steel, titanium, titanium alloy, magnesium alloy or aluminum alloy is desirable. The head 1 can include one or more metal materials. A fiber reinforced resin may be used for a part of the head 1.

  The head 1 includes a face portion 2, a crown portion 3, a sole portion 4, and a side portion 5 so as to define an internal hollow portion i.

  The face portion 2 has a face 2a that is a ball striking surface. The crown part 3 is connected to the face part 2 and forms the upper surface of the head. The sole portion 4 is connected to the face portion 2 and forms the bottom surface of the head. The side part 5 connects between the crown part 3 and the sole part 4. The toe side and the heel side of the side part 5 are connected to the face part 2 respectively. A hosel portion 6 is provided on the heel side of the crown portion 3. The hosel portion 6 has a cylindrical shape having a shaft insertion hole 6a so that a shaft (not shown) can be fixed.

  The head 1 of this embodiment is a wood type. The wood-type head includes at least a driver (# 1), a brushy (# 2), a spoon (# 3), a buffy (# 4), and a creek (# 5). In addition, the wood-type head includes a head having a substantially similar shape even if the count or name is different from those listed above. In other embodiments, the head 1 may be configured as an iron type or a utility type.

  FIG. 2 shows a cross-sectional view of the head 1 of FIG. This sectional view is a longitudinal section of the head including the sweet spot SS. The sweet spot SS is a foot of a perpendicular line N that is lowered from the center of gravity G of the head to the face 2a. The vertical cross section is a cross section including the perpendicular N and perpendicular to the horizontal plane HP in a reference state where the head 1 is placed on the horizontal plane HP at a specified lie angle, loft angle, and hook angle. The “specified lie angle”, “specified loft angle”, and “specified hook angle” mean the lie angle, loft angle, and hook angle determined for the head 1, respectively.

  The head 1 includes a face peripheral region 7 that is continuous with the face portion 2 and extends rearward of the head. The head rear means the opposite side to the face 2a.

  The face peripheral area 7 is an area adjacent to the face portion 2 so as to surround the face portion 2. The face peripheral area 7 includes a crown portion 3, a sole portion 4, and a side portion 5.

  The rigidity of the face peripheral region 7 has a great influence on the deflection of the face portion 2 when the ball is hit. In the head 1 of the present embodiment, a part of the face peripheral region 7 is devised in order to greatly deflect the face portion 2 and improve the resilience performance of the head 1 when the ball is hit.

  The head 1 according to this embodiment has a front portion 8 that extends from the face portion 2 side to the rear of the head and ends at a part of the sole portion 4 that is the face peripheral region 7, and a terminal that extends from the head rear to the face portion 2 side. A rear portion 9 is provided. The front side portion 8 and the rear side portion 9 are not fixed to each other. Further, one of the front portion 8 and the rear portion 9 is provided with an insertion hole 10 extending in the head longitudinal direction, and the other of the front portion 8 and the rear portion 9 is inserted into the insertion hole 10 in the head longitudinal direction. It is inserted movably. In this embodiment, an example is shown in which the insertion hole 10 is provided in the front portion 8 and the rear portion 9 is inserted into the insertion hole 10.

  Here, the head front-rear direction is the front-rear direction when the face 2 a is the front side of the head 1 and the back face is the rear side of the head 1. The vertical direction of the head 1 is the vertical direction in the reference state. Further, the toe-heel direction of the head 1 is a direction orthogonal to both the head front-rear direction and the vertical direction.

  In such a head 1, the front portion 8 and the rear portion 9 are easily displaced in the front-rear direction of the head by the force transmitted from the face portion 2 when the ball is hit. Due to this deviation, a large elastic deformation is caused in the face peripheral region 7 including the periphery. Such a large elastic deformation of the face peripheral region 7 provides a large deflection of the face portion 2 in the front-rear direction of the head, and can exhibit a large resilience performance. Therefore, the head 1 of the present embodiment provides a large hitting distance.

  The front portion 8 is provided with an insertion hole 10 extending in the head longitudinal direction, and the rear portion 9 is inserted into the insertion hole 10 so as to be movable in the head longitudinal direction. Accordingly, such a head 1 can prevent foreign matter from entering the hollow portion i through the insertion hole 10 as much as possible while providing a large deflection of the face portion 2 when the ball is hit.

  FIG. 3 shows a partially enlarged view of the face peripheral area 7 provided with the front portion 8 and the rear portion 9. FIG. 4 shows a partially broken perspective view in which the face portion 2 of the head 1 is removed. As shown particularly well in FIG. 3, the front portion 8 includes a flange portion 11 extending from the edge of the face 2a (in this example, the leading edge 2e) to the rear of the head, and a hollow portion i of the head 1 from the flange portion 11. And a main part 12 rising to the side.

  The main portion 12 is provided at a distance from the back surface of the face portion 2. Thereby, a sufficient gap 20 is provided between the main portion 12 and the face portion 2 to prevent contact between the deformed face portion 2 and the main portion 12 when the ball is hit.

  The main portion 12 is provided with an insertion hole 10 extending in the front-rear direction of the head. The insertion hole 10 of the present embodiment passes through the main portion 12 in the head front-rear direction, but may be a bottomed hole with one end opened and the other end closed. Such an insertion hole 10 limits the amount of movement of the rear portion 9 in the front-rear direction of the head within a certain range, and is useful for improving the durability of the head 1, for example. Furthermore, the cross-sectional shape of the insertion hole 10 is not particularly limited, and can be formed in various shapes such as a circular shape, an oval shape, and a rectangular shape. As shown in FIG. 4, the insertion hole 10 of the present embodiment is formed as a flat slit-like opening that is small in the vertical direction of the head 1 and large in the toe-heel direction. Furthermore, although the insertion hole 10 extends along the horizontal line in FIG. 3, the insertion hole 10 may be provided inclined with respect to the horizontal line.

  As shown in FIGS. 3 and 4, the rear portion 9 extends from the sole body 13 constituting the main portion of the sole portion 4 toward the insertion hole 10 of the front portion 8. More specifically, the rear portion 9 includes a first portion 14 that is inclined toward the hollow portion i toward the face portion 2 side, and a second portion 15 that is continuous with the first portion 14 and extends substantially in the horizontal direction of the head. The second portion 15 is inserted into the insertion hole 10.

  The second portion 15 has a cross-sectional shape slightly smaller than the insertion hole 10 so that the second portion 15 can move in the front-rear direction of the head with respect to the front portion 8. Thereby, the second portion 15 of the rear portion 9 can slide in the insertion hole 10. Further, since the second portion 15 is inserted into the insertion hole 10, most of the insertion hole 10 is always closed, so that foreign matter can enter the hollow portion i of the head 1 from the insertion hole 10 as much as possible. Can be prevented.

  As shown in FIG. 3, the main portion 12 of the front portion 8 preferably includes an extension portion 12a extending rearward of the head. The extension portion 12a of the present embodiment is formed by greatly extending the upper portion of the insertion hole 10 toward the rear of the head. Although the extension part 12a of this form is provided without contacting the rear side part 9, it is not limited to such an aspect.

  In a more preferred embodiment, the extension 12a desirably includes a thick portion 16 having a thickness t2 that is greater than the thickness t1 of the rear portion 9. Since such a thick portion 16 has a relatively large weight, it can be suitably used as a weight distribution element of the head 1 by appropriately determining its shape.

  As shown in FIG. 4, the thick portion 16 of the present embodiment extends long in the toe-heel direction on the sole portion 4 side of the head 1. Both ends of the thick portion 16 in the toe-heel direction are fixed to, for example, the inner surface of the side portion 5 of the head 1. Such a head 1 can obtain a lower center of gravity and a large moment of inertia.

  In a particularly preferable aspect, it is desirable that the thick portion 16 is located on the face portion 2 side of the head gravity center G in the longitudinal section of the head including the sweet spot SS shown in FIG. In a more preferable aspect, it is desirable that the thick part 16 is located on the sole part 4 side with respect to the center of gravity G of the head. Since such a head 1 can have a lower head center of gravity G which is lower and close to the face portion 2, for example, it is possible to provide a trajectory (low spin rate) preferred by advanced players. However, the thick portion 16 is not an essential constituent element of the present invention but an arbitrary constituent element.

  FIG. 5 shows an exploded perspective view of the head when the head 1 of the present embodiment is viewed from the sole portion 4 side. The head 1 can include, for example, a hollow head main body 1A having an opening O in the face peripheral region 7 (in this example, the sole portion 4), and a sole plate 1B disposed in the opening O.

  The head main body 1A is integrally formed by, for example, casting or the like, or is formed with a front portion 8 in the face peripheral region 7 in advance by joining two or more members. The opening O provides a relatively large opening from the rear end 12e of the main portion 12 of the front portion 8 to the rear of the head. On the toe side and the heel side of the opening O, for example, receiving pieces 21 and 21 having a support surface are provided so that the sole plate 1B can be stably supported from the hollow part i side during assembly. It has been. Further, side walls 22 facing the toe side end surface 9t and the heel side end surface 9h of the rear portion 9 are provided on the toe side and the heel side of the opening O.

  The sole plate 1B is formed by a press or the like, for example, and a rear portion 9 is formed on the front side thereof. In order to obtain the head 1 of the present embodiment, the sole plate 1B is first inserted at the rear portion 9 into the insertion hole 10 of the front portion 8 of the head body 1A. Thereafter, the rear end 24 side of the sole plate 1B is integrally fixed to the head body 1A. If necessary, the rear end 24 side of the toe side end surface 9t and the rear end 24 side of the heel side end surface 9h of the sole plate 1B may be fixed to the head body 1A, respectively. As a result, the rear portion 9 of the sole plate 1B is supported in a cantilevered state on the head body 1A, and the head 1 of the present embodiment is manufactured.

  In a preferred embodiment, the insertion hole 10 and the front edge 9e of the rear portion 9 desirably extend in the toe-heel direction. Thereby, when the ball is hit, a large deflection of the face portion 2 can be obtained at a wider hitting position of the face portion 2 in the toe-heel direction. In a more preferred embodiment, it is desirable that the insertion hole 10 and the front edge 9e of the rear portion 9 each have a length L of 10 mm or more, more preferably 20 mm or more in the toe-heel direction. On the other hand, if the length is increased, the durability of the head 1 may be reduced. From this point of view, the insertion hole 10 and the front edge 9e of the rear portion 9 are each desirably 80 mm or less, more preferably 70 mm or less in the toe-heel direction.

  In a preferred embodiment, it is desirable that the insertion hole 10 and the front edge 9 e of the rear portion 9 are located near the face portion 2. Thereby, the face part 2 can be bent more largely.

  Furthermore, in a preferable aspect, the front side part 8 and the rear side part 9 are provided in the sole part 4 like this embodiment. In other embodiments, the front portion 8 and the rear portion 9 may be provided on the crown portion 3, the side portion 5, or the like. Further, it may be formed across two or more parts of the crown part 3, the sole part 4 and the side part 5.

  FIG. 6A shows a cross-sectional view of a head 1 according to another embodiment of the present invention. This sectional view is a sectional view at the same position (AA in FIG. 1) as FIG. In the present embodiment, the insertion hole 10 includes a tapered hole portion 10a, and the rear portion 9 inserted into the insertion hole 10 includes a tapered portion 9a that fits into the tapered hole portion 10a. .

  The insertion hole 10 is provided with a tapered hole 10a having a vertical width that gradually decreases from the face part 2 side to the rear of the head. However, the insertion hole 10 may be configured with a tapered hole portion 10a at a part in the length direction.

  On the other hand, the rear portion 9 includes a tapered portion 9a that fits into the tapered hole portion 10a. The rear side portion 9 of the present embodiment is composed of a tapered portion 9a and a non-tapered portion 9b that continues to the rear of the head and has a substantially constant vertical width.

  In the head 1 configured as described above, the following operation is obtained. First, at the time of hitting the ball at the face portion 2, as shown in FIG. 6B, the relative taper portion 9 a of the rear portion 9 extends along the taper hole portion 10 a of the insertion hole 10. Can move forward. This is the same as the previous embodiment. Further, in the static state in which the head 1 of this embodiment is not hitting a ball, the taper portion 9a of the rear portion 9 is a taper hole of the insertion hole 10 as shown in FIG. 10a fits in a state where movement toward the rear of the head is constrained.

  It is particularly preferred that the rear part 9 is designed to be pulled slightly forward by the front part 8 in a static state. Thereby, the taper hole portion 10a and the taper portion 9a of the insertion hole 10 are in closer contact with each other, the gap between the two is reduced, and the entry of foreign matter into the hollow portion i can be prevented more reliably from there. it can.

  For example, the front portion 8 of the head 1 of this embodiment is provided in a state where the main portion 12 is separated from the flange portion 11. The rear portion 9 is also provided in a state separated from the sole body 13. After the rear portion 9 and the main portion 12 are assembled in a state where the rear portion 9 is inserted into the insertion hole 10 in advance, the rear portion 9 and the main portion 12 are respectively fixed to the sole body 13 and the flange portion 11.

FIG. 7 shows still another embodiment of the present invention.
In this embodiment, the insertion hole 10 is provided in the rear side part 9, and the front side part 8 is inserted in the insertion hole 10, and differs from each said embodiment.

  In this embodiment, the rear part 9 has a main part 30 provided with an insertion hole 10, and the main part 30 includes an extension part 32 extending in front of the head without contacting the front part 8. . The extension part 32 includes a thick part 32 a having a thickness larger than that of the front part 8. For example, the thick portion 32a extends in the toe-heel direction of the head 1 as in the above embodiment.

  Also in this embodiment, in the longitudinal section of the head including the sweet spot SS, it is desirable that the thick part 32a is located on the face part 2 side and the sole part 5 side from the head center of gravity G.

  Also in such an embodiment, the same operation as the embodiment of FIG. 2 described above can be obtained. Furthermore, in this embodiment, since the mass of the front portion is smaller than that in the embodiment of FIG. 2, the front portion can be displaced more greatly when the ball is hit.

  As mentioned above, although several embodiment of this invention was described in detail, this invention is not limited to said specific embodiment, It implements by changing into various aspects.

Wood type golf club heads based on the use of Table 1 were prototyped and tested for resilience and durability performance. Each head was basically the same except for the parameters shown in Table 1. The comparative example is a head configured such that a contact surface where the front side portion and the rear side portion are in contact is welded so that they cannot be displaced relative to each other in the head longitudinal direction. The main common specifications of the head are as follows.
Lie angle: 58 °
Loft angle: 15 °
Head mass: 207g
Maximum width in the toe-heel direction of the face: 85mm
The test method is as follows.

<Rebound performance>
U. S. G. A. The coefficient of restitution was calculated according to the Procedure for Measuring the Velocity Ratio of a Club Head for Conformance to Rule 4-1e, Revision 2 (February 8, 1999). The results are compared with the maximum value among them, and displayed as an index with the comparative example being 100. The larger the value, the better.

<Durability>
A carbon shaft (MP-700, Flex S) manufactured by Dunlop Sports Co., Ltd. was attached to each test head, and a 45-inch wood type golf club was prototyped. These were attached to a swing robot manufactured by Miyamae Co., Ltd., and a golf ball was hit at a head speed of 50 m / s, and the number of hits until the head was damaged (the upper limit was 3000 shots) was measured. The result is an index with the hit number of the comparative example as 100, and the larger the value, the better.

  The test results are shown in Table 1. As a result of the test, it was confirmed that the heads of the examples exhibited excellent resilience performance.

DESCRIPTION OF SYMBOLS 1 Golf club head 2 Face part 2a Face 3 Crown part 4 Sole part 5 Side part 7 Face peripheral area 8 Front part 9 Rear part 9a Tapered part 10 Insertion hole 11 Flange part 12 Main part 12 Front wall part 16 Thick part

Claims (12)

A golf club head provided with a hollow portion inside,
A face portion having a face for hitting a ball, and a face peripheral region extending to the back of the head connected to the face portion
A part of the peripheral area of the face is provided with a front portion that extends from the face portion side to the rear of the head and a rear portion that extends from the rear of the head to the face portion and ends.
The front part and the rear part are not fixed to each other,
One of the front part and the rear part is provided with an insertion hole extending in the head front-rear direction,
The other of the front part and the rear part is inserted into the insertion hole so as to be slidable in the front-rear direction of the head.   The golf club head according to claim 1, wherein the insertion hole is provided in the front portion, and the rear portion is inserted into the insertion hole. The front side portion has a main portion provided with the insertion hole,
The golf club head according to claim 2, wherein the main portion includes an extension extending rearward of the head.   The golf club head according to claim 3, wherein the extension portion includes a thick portion having a thickness larger than that of the rear portion.   The golf club head according to claim 4, wherein the thick portion extends in a toe-heel direction of the head.   6. The golf club head according to claim 4, wherein the thick portion is located closer to the face portion than the center of gravity of the head in a longitudinal section of the head including a sweet spot. The insertion hole includes a tapered hole portion whose vertical width gradually decreases toward the rear of the head,
The rear portion is relatively movable to the front of the head from the tapered hole when the ball hits the face portion, and in the static state, the backward movement of the head is constrained by the tapered hole. The golf club head according to claim 1, further comprising a tapered portion that fits in the formed state.   The golf club head according to claim 1, wherein the insertion hole is provided in the rear portion, and the front portion is inserted into the insertion hole. The rear side portion has a main portion provided with the insertion hole,
The golf club head according to claim 8, wherein the main portion includes an extension extending forward of the head without contacting the front portion.   The golf club head according to claim 9, wherein the extension includes a thick portion having a thickness larger than that of the front portion.   The golf club head according to claim 10, wherein the thick part extends in a toe-heel direction of the head. 12. The golf club head according to claim 10, wherein the thick portion is located closer to the face portion than the center of gravity of the head in a longitudinal section of the head including a sweet spot.

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