Source: https://patents.google.com/patent/JP4445629B2/en
Timestamp: 2020-02-25 03:32:03
Document Index: 521527637

Matched Legal Cases: ['art 3', 'art 3', 'art 2', 'art 3', 'art 3', 'art 2', 'art 3', 'art 3', 'art 2', 'art 3', 'art 2', 'art 3', 'art 3', 'art 3', 'art 2', 'art 3', 'art 4', 'art 5', 'art 6', 'art 7', 'art 8', 'art 11', 'art 12', 'art 14']

JP4445629B2 - Wood type golf club head - Google Patents
JP4445629B2
JP4445629B2 JP2000028239A JP2000028239A JP4445629B2 JP 4445629 B2 JP4445629 B2 JP 4445629B2 JP 2000028239 A JP2000028239 A JP 2000028239A JP 2000028239 A JP2000028239 A JP 2000028239A JP 4445629 B2 JP4445629 B2 JP 4445629B2
JP2000028239A
JP2001212272A (en
祐 長谷部
2000-02-04 Application filed by ブリヂストンスポーツ株式会社 filed Critical ブリヂストンスポーツ株式会社
2000-02-04 Priority to JP2000028239A priority Critical patent/JP4445629B2/en
2001-08-07 Publication of JP2001212272A publication Critical patent/JP2001212272A/en
2010-04-07 Publication of JP4445629B2 publication Critical patent/JP4445629B2/en
The present invention relates to a so-called wood type golf club head having a head width larger than the head height and having a hollow portion formed of a metal outer shell.
Conventionally, a convex part is provided on the sole part of a wood type golf club head to improve the direction stability in the swing direction, or a concave part is provided on the sole surface, and a copper alloy is press-fitted or fitted into the concave part. There is a thing with a low center of gravity.
However, in the above-described technique, the center of gravity cannot be sufficiently lowered because the direction is simply stabilized or the specific gravity is lighter than that of the tungsten alloy.
Accordingly, an object of the present invention is to provide a wood type golf club head capable of sufficiently reducing the center of gravity.
In order to achieve the above object, according to the present invention, in a wood type golf club head having a head width larger than a head height and having a hollow portion formed of a metal outer shell, a head main body and a sole portion are separately formed. the weight portion downward sole portion is made of a tungsten alloy which is press-fitted from below into a recess formed in dented upward is opening is provided, the weight along the outer periphery of the surface abutting on the concave upper surface of the sole portion of the weight section A convex portion is provided in the portion, and a groove provided along the upper surface is formed in the concave portion of the sole portion, and when the convex portion of the weight presses the weight portion into the concave portion, the plastic portion is deformed and enters. Nde a weight portion disposed in the recess so as to fit to form the weight portion quadrilateral, the missing portion Tsumutotsu part of its four corners is provided, welded to a sole portion having the weight section to the head body It is made with the head.
Hereinafter, the present invention will be described in detail. The wood type golf club head of the present invention has a head shape having a head width larger than the head height, such as magnesium alloy, aluminum alloy, stainless steel, maraging steel, titanium alloy, etc. The present invention relates to a wood type golf club head called a metal head having a hollow portion by forming at least the face portion 5, the side portion 11, the crown portion 4 and the sole portion 2 from metal.
In the wood type golf club head of the present invention, a convex portion 7 is provided on the sole portion 2 of the head body 1 from the face portion 5 side toward the rear. The convex portion 7 is configured such that a recess 6 is formed in the sole portion 2 so that a material having a specific gravity greater than that of the head body 1 can be fitted, and the specific gravity is 9 or more and 19 or less, preferably 10 or more and 15 in the recess 6. A metal member (weight part 3) made of the following tungsten alloy is fitted and fixed. The specific gravity is set to 9 or more because if it is less than 9, it is replaced with a copper alloy such as brass. When the head body 1 is made of stainless steel, there is little difference in specific gravity from this stainless steel, and the effect of low center of gravity is achieved. This is because there are few. The reason why it is 19 or less is that the specific gravity of tungsten is 19.3. The preferable range is 15 or less by mixing copper, nickel and other metals to soften the hardness of the alloy, making it easy to press fit, and fitting with the recess 6 provided in the sole portion 2 of the head body 1. This is to make it difficult to form a gap with the weight 3 to be fixed.
Further, by providing the sole portion 2 of the head body 1 with the convex portion 7 from the face portion 5 toward the rear, the area in contact with the ground and the turf is reduced, and it is difficult to receive the resistance of the turf. It works to correct the swing direction.
In general, if the head body 1 is made of stainless steel, the overall cost is low, which is appreciated by users. However, since the head main body 1 is heavier than a titanium alloy, the weight portion 3 needs to be 25 to 60 g. If the weight is less than 25 g, the effect of the low center of gravity is small, the weight portion 3 is small, and it is difficult to fit into the concave portion 6 of the sole portion 2. In the case of fairway wood, 60 g or less is preferable from the size of the sole. However, in the case of a wood type golf club head for a driver made of a titanium alloy, the weight can be up to 80 g. If it is heavier than that, it is necessary to reduce the head, which is not preferable. In particular, this golf club head is effective for fairway wood having a loft angle of 12 ° to 27 °, preferably 13 ° to 24 °. The fairway wood preferably has a low center of gravity in order to hit a ball that has been rolled on the ground. Similar to attaching the weight portion 3 to the sole portion 2, the weight portion 3 is attached to the face portion 5 so that There is a way to lower the center of gravity. Therefore, the weight part 3 is preferably located near the center of the sole part 2, and the center of gravity of the weight part 3 is preferably located closer to the face than two-thirds of the sole width. This is because it is not preferable to make the head too large in order to reduce the height of the head and reduce the resistance of the turf. Therefore, the head volume is preferably 130～200Cm 3, especially 135～170Cm 3 are preferred.
Furthermore, it is preferable that the metal material (weight part 3) fitted and fixed to the sole part 2 is fixed so as to be exposed on the outer wall surface of the sole, and the exposed area is sufficiently large. it is preferable that the ~1000mm 2. If the exposed area is small, the height of the weight part 3 is increased and it is difficult to lower the center of gravity. If it is too wide, the weight part 3 becomes thin and difficult to fix, or it cannot fit in the recess 6 of the sole part 2. is there.
The golf club head of the example of the present invention was formed by investment casting using stainless steel CUSTOM (custom) 450 manufactured by Carpenters (USA) for the head body 1. The composition of CUSTOM 450 is mainly composed of Fe, Cr is 14 to 16%, Ni is 5 to 7%, Cu is 1.25 to 1.75%, Mo is 0.5 to 1.0%, and S is 0 to 0.03%, Si is 0 to 1.0%. The stainless steel is stronger and more stretched than SUS630, which is a stainless steel generally used for metal wood type golf club heads, and has a specific gravity of 7.75 and a specific gravity of SUS630 of about 7.78. Is a feature.
The weight portion 3 (see FIG. 5) fitted to the recess 6 of the sole portion 2 of the head is mainly made of an alloy of tungsten and nickel, has a specific gravity of 12, has a weight of 43 g, and has a sole portion. The surface area exposed to 2 was 690 mm 2 and the thickness was 5 mm. The weight portion 3 was 33 g after the weight portion 3 was fitted and fixed at the center position of the sole portion 2 and the sole portion 2 of the golf club head was polished. The sole portion 2 of the head main body 1 was formed separately from the head main body 1, and the weight portion 3 was fitted into the concave portion 6 by press fitting, and then fixed to the head main body 1 by arc welding.
The thickness of the crown portion 4 is set to 0.8 mm in consideration of strength when using a normal stainless steel material. In the present invention using the custom 450, the thickness of the crown portion 4 is 0.6 mm or less. The thickness of the crown portion 4 of the present invention was 0.5 mm. Similarly, the thickness of the face portion 5 is usually 2.7 mm, whereas the thickness of the face portion 5 of the present invention is set to 2.4 mm or less and is set to 2.2 mm.
A weight convex portion 12 (see FIGS. 9 and 10) having a right-angled triangular cross section along the outer periphery of the weight portion 3 is provided on the surface of the weight portion 3 that contacts the upper surface of the concave portion 6 of the sole portion 2. In the four corners, missing portions 13 are provided so that air can escape during press-fitting. The weight convex portion 12 is plastically deformed into a groove portion 14 having a width of 1 mm provided along the upper surface of the concave portion 6 of the sole portion 2 during press-fitting, and the weight portion 3 is fitted and fixed to the sole portion 2.
The sole shape of the wood type golf club head according to the embodiment of the present invention is such that the sole radius is 127 mm, and the center radius of the toe 8 side and the heel 9 side is convex with an 80 mm sole radius over a width of 50 mm. The convex portion 7 was formed from the face portion 5 side toward the back side. Further, as shown in FIG. 8, the weight portion 3 than the line L 1 which connects an end edge and the heel 9 side of the toe 8 side of the sole portion 2 is designed convex portion 7 such that the downward preferably, the weight portion 3 than the convex portion toe 8 side 7 and the line L 2 connecting the heel 9 side end provided in the sole portion 2 is designed the convex portion 7 such that downward.
In addition, regarding the projected area represented by the plan view (see FIG. 6) of the wood type golf club head which is an embodiment of the present invention, the lie angle of the golf club head of the embodiment is 58 °. The projection area of the head body 1 was measured using a three-dimensional measuring machine, and the projection area of the sole portion 2 was measured in the same manner. As a result, the projected area of the sole portion 2 was 82 to 83% of the projected area of the head body 1. This is because the side portion 11 is designed to be substantially vertical, the area of the sole portion 2 is widened, and the center of gravity is lowered.
About the said Example and general fairway wood, the 3rd wood and the 5th wood were created and compared, respectively. The results are summarized in Table 1.
As a result of the trial hit evaluation for the above examples and comparative examples, the ball is likely to rise, and the convex portion 7 provided on the sole portion 2 is less susceptible to ground resistance and improves the swing direction. I was able to get an evaluation that it was easy. Further, as a strength evaluation, a 1000-shot hitting evaluation was performed, and an investigation was performed for the presence or absence of rattling of the weight part 3 and a gap with the sole part 2, but no rattling or gap was observed.
In the present invention, the head body 1 can be formed of a titanium alloy to increase the head volume and can be applied to a so-called driver of a wood type golf club having a loft angle of 7 ° to 14 °. Since the titanium alloy head has a specific gravity of about 4.2 to 5.0 compared to the stainless steel head, the head volume can be increased, and the head volume can be 250 to 380 cm 3 . Therefore, in the wood type golf club head for driver made of titanium alloy, the weight portion 3 can be placed in a weight of 40 to 80 g, preferably 50 to 70 g, and the center of gravity can be lowered as compared with the case where the head is made of stainless steel.
In the wood type golf club head described above, the side portion 11 of the head body 1 extends from the toe 8 side to the heel 9 side. By setting the angle within the range of 95 °, preferably 80 to 90 °, the sole area can be increased to lower the center of gravity, and when the golf club is held in the address state, the side portion 11 is visible. It is preferable because it does not enter and does not bother me. At this time, the projected area of the sole portion 2 with respect to the projected area of the head body 1 is preferably in the range of 80 to 100%. The head is measured at an appropriate lie angle of each head, the projected area of the crown portion 4 is measured in a state where the hosel portion 10 is cut off in the horizontal direction at the maximum height position of the crown portion 4, and the sole portion 2 is measured. Compare the projected areas.
In the wood-type golf club head described above, the sole portion 2 of the head body 1 is formed separately, the recess portion 6 is provided in the sole portion 2, and the groove portion is provided in the side wall surface of the recess portion 6, and the weight When the weight part 3 is press-fitted, the weight part 3 enters the groove part due to deformation of the weight part 3, and a protrusion is provided on the outer peripheral edge of the recess 6 of the sole part 2, and the protrusion is crushed, thereby It is preferable that the weight portion 3 is fixed to 2 and the sole portion 2 is fixed to the head main body 1 by welding. Since the weight portion 3 has a large specific gravity and is heavy, it can be more firmly fixed to the head body 1 not only by press fitting but also by caulking. In order to press-fit, it is preferable that a sole portion 2 is formed separately from the head main body 1 and the weight portion 3 is press-fitted and then fixed to the head main body 1 by welding.
By providing a convex portion on the sole portion of the wood type golf club head of the present invention, the direction stability in the swing direction is improved, and further, the weight portion made of an alloy having a large specific gravity is used for the sole portion, thereby lowering the center of gravity. It was possible to achieve the effect that the ball was easy to rise.
FIG. 1 is a front view showing a preferred embodiment of the present invention.
FIG. 2 is a right side view of FIG.
3 is a rear view of FIG. 1. FIG.
4 is a left side view of FIG. 1. FIG.
6 is a plan view of FIG. 1. FIG.
8 is a cross-sectional view taken along line BB in FIG.
FIG. 9 is an exploded cross-sectional view.
FIG. 10 is a perspective view of a weight portion.
DESCRIPTION OF SYMBOLS 1 Head main body 2 Sole part 3 Weight part 4 Crown part 5 Face part 6 Concave part 7 Convex part 8 Toe 9 Heel 10 Hosel part 11 Side part 12 Convex convex part 14 Groove part
In the wood type golf club head having a head width larger than the head height and having a hollow portion formed of a metal outer shell,
Make the head body and sole part separately,
The weight portion downward sole portion is made of a tungsten alloy which is press-fitted from below into a recess formed in dented upward is opening is provided,
A weight convex portion is provided on the weight portion along the outer periphery of the surface contacting the upper surface of the concave portion of the sole portion of the weight portion, and a groove provided along the upper surface is formed in the concave portion of the sole portion,
The weight portion in the recess so that the weight protrusion in the groove is fitted Nde write enters plastically deformed when press-fitting the weight section in the recess provided,
This weight part is formed into a quadrilateral, and a missing part is provided in the convex part of the weight at the four corners,
A wood-type golf club head characterized in that a sole portion having a weight portion is welded and fixed to a head body to form a head.
The wood-type golf club head according to claim 1, wherein the weight portion has a specific gravity of 10 to 15.
3. The wood type golf club head according to claim 1, wherein the weight portion is formed of a tungsten nickel alloy having a specific gravity of 10 to 15.
A protrusion provided on the outer peripheral edge of the recess, wood type golf club according to any one of claims 1 to 3, characterized in that the caulking collapsing the protrusions after press-fitting of the weight head.
JP2000028239A 2000-02-04 2000-02-04 Wood type golf club head Expired - Fee Related JP4445629B2 (en)
JP2000028239A JP4445629B2 (en) 2000-02-04 2000-02-04 Wood type golf club head
JP2001212272A JP2001212272A (en) 2001-08-07
JP4445629B2 true JP4445629B2 (en) 2010-04-07
ID=18553676
JP2000028239A Expired - Fee Related JP4445629B2 (en) 2000-02-04 2000-02-04 Wood type golf club head
JP (1) JP4445629B2 (en)
2000-02-04 JP JP2000028239A patent/JP4445629B2/en not_active Expired - Fee Related
JP2001212272A (en) 2001-08-07
US20060094534A1 (en) 2006-05-04 Putterhead with Dual Milled Face Pattern