CN203577265U

CN203577265U - Golf club head

Info

Publication number: CN203577265U
Application number: CN201320257346.0U
Authority: CN
Inventors: M·C·迈尔休姆; U·V·德施穆克; J·莫林; N·德拉克鲁兹; C·D·哈韦尔; T·O·贝内特
Original assignee: Acushnet Co
Current assignee: Acushnet Co
Priority date: 2012-02-23
Filing date: 2013-02-25
Publication date: 2014-05-07
Anticipated expiration: 2023-02-25

Abstract

A golf club head with improved striking face performance is disclosed herein. More specifically, the utility model discloses a golf club head having a top section, a bottom section, a skirt section, and a thickened central region surrounded by an internal and an external transition region; wherein the thickened central region has an inner perimeter that takes on a shape that substantially resembles the shape of an outer perimeter of the striking face of the golf club head.

Description

Glof club head

Technical field

The utility model relates to a kind of striking surface of improvement of glof club head.Or rather, the utility model relates to a kind of striking surface with the middle section of the thickening of being surrounded by inside and outside transitional region, wherein, the middle section of this thickening has central circumference, and the shape of central circumference is substantially similar to the shape of pole face circumference of the striking surface of glof club head.

Background technology

Golf sports is always with closely related for participating in the equipment of this motion.Although after rising in golf sports Scotland in early days, actual golf sports does not change a lot, for carrying out the equipment of golf sports, significant variation has occurred.Although start in early days from golf, any variation a large amount of golf equipments is maximum there is dispute, and the kaki of current metal wood-type golf clubs and golf sports interim original adoption morning is not greatly both and is difficult to argue.

Aluminum medal wood, the design based on its routine, has improved the performance of the glof club head of kaki type by forming the metal-back of hollow, and it is again by allowing striking surface deflection and greatly improved the recovery coefficient of glof club head during clashing into.Except improving recovery coefficient, metal die model glof club head makes golf sports more easy for medium level golfer by increasing the rotary inertia of glof club head, and this keeps the stability of golf clubs during clashing into realize when increasing size.

Although obtained above-mentioned all properties, golf club design person have further expanded performance bounds by changing the thickness at golf clubs head batting surface rear portion.Change the thickness at golf clubs head batting surface rear portion by regulating the flexural rigidity of golf clubs head batting surface to improve the performance of glof club head strategically to improve the size and dimension of the sweet spot on striking surface, wherein, sweet spot is defined as the part that can obtain high recovery coefficient of striking surface.

U.S. Patent No. 6319150 has illustrated and has changed the thickness of facing the wall and meditating to make one of maximized early stage trial of pole face intensity the minimum pole face quality in the situation that.U.S. Patent No. 6319150 provides a kind of maximum sized golf clubs that has increased available golf clubs striking face, this is by changing thickness to allow to save extra weight, and extra weight is strategically placed on to the rotary inertia that alternative site improves glof club head realizes.

Although regulating these of thickness of golf clubs head batting surface, early stage to attempt providing aspect basic in the future development for this theory be laudable, but the great majority in them are not realized size, shape and geometric properties based on striking surface completely, the obtainable performance benefit of size, shape and geometric properties of the variable thickness profile by optimization striking surface rear portion.United States Patent (USP) 6652391 illustrates size, shape and the geometric properties of the striking surface that is intended to change golf club to attempt to improve a kind of trial of performance, but it is associated with size, shape and the geometric properties of striking surface self.Or rather, U.S. Patent No. 6652391 discloses a kind of antetheca of variable thickness, and it has the protrusion district that thickness increases on surface within it.The protrusion district that this thickness increases comprises from the rearwardly projecting general toroidal quality of antetheca (mass).Also from the rearwardly projecting general conical quality of antetheca, can be positioned at this annular quality inner.

U.S. Patent No. 6997820 provides the example of another kind of optional trial, and it regulates size, shape and the geometric properties of the thickness geometry of being covered by striking plate, further to improve the basic theory of the golf clubs with variable thickness pole face.In this case, U.S. Patent No. 6997820 discloses a kind of panel, and it has the vertical region of thickness increase and the middle section that thickness reduces.Vertically the portion of extending upward in region comprises the dispersion section that the upper area that reduced by thickness separates.

U.S. Patent No. 7137907 provides another for adjusting the example with diverse geometry of golf clubs head batting surface performance.Or rather, U.S. Patent No. 7137907 discloses a kind of pole face plug-in unit, and it comprises the inner surface with the first thickness part and the second thickness part.The thickness of the first thickness part is preferably than at least 0.025 inch greatly of the thickness of the second thickness area.

U.S. Patent No. 6623377 provides the another example of attempting to adjust by changing the thickness of striking surface glof club head performance.Or rather, U.S. Patent No. 6623377 discloses a kind of glof club head with striking plate, this striking plate has the region of variable thickness, and the region of this variable thickness has middle section, and the thickness range in the first any other region of Thickness Ratio of middle section is thick.The thickness in described region therefrom mind-set successively decreases outward.

Although carried out a lot of trials adjusting on size, shape and the geometric properties of golf clubs head batting surface rear surface, above-mentioned arbitrary patent was not all studied the relation between size, shape and the geometric properties of the striking surface relevant to the geometric properties of the whole geometry of striking surface self.The golf clubs having at the striking surface of optimization aspect size, shape and geometric properties can improve the recovery coefficient of glof club head greatly, and increases the sweet spot of glof club head.

Therefore, as above-mentioned visible, although golf clubs is technical, make progress, prior art is not carefully inspected the relation between size, shape and the geometric properties of the striking surface relevant with size, shape and the geometric properties of the variable face thickness profile of being covered by striking surface.Although carried out a large amount of trials on change striking surface thickness, prior art is owing to being used random geometry to seem not enough, and random geometry is optimized the performance capability of the glof club head relevant with striking surface self completely.Finally, can find out from foregoing, need in the prior art a kind of glof club head, it has the geometry of variable thickness, and the geometry of this variable thickness is according to size, shape and the geometric properties of the striking surface optimization different-thickness level of glof club head self.

Utility model content

An aspect of the present utility model is the glof club head with top, bottom and skirt section.This glof club head further comprises striking surface part and main part, and striking surface is partly positioned at the front portion that is suitable for impacting golf of glof club head, and main part is connected to the afterbody of striking surface part.Striking surface partly has pole face circumference, and further comprises the middle section of the thickening with central circumference and the transitional region with transition circumference.The geometry of the geometry of the central circumference of glof club head and pole face circumference is similar, and transitional region is thicker than locating in bottom at the place, top of striking surface, near the top formation catenary (cantenary curve) of striking surface.

Of the present utility model is the glof club head with top, bottom and skirt section on the other hand.This glof club head further comprises striking surface part and main part, and striking surface is partly positioned at the front portion that is suitable for impacting golf of glof club head, and main part is connected to the afterbody of striking surface part.Striking surface partly has pole face circumference, and further comprises the middle section of the thickening with central circumference and the transitional region with transition circumference.The geometry of the geometry of the central circumference of glof club head and pole face circumference is similar, and the ratio of the total length of the total length of central circumference and pole face circumference is greater than approximately 0.23 and be less than approximately 0.32.

Another aspect of the present utility model is the glof club head with top, bottom and skirt section.This glof club head further comprises striking surface part and main part, and striking surface is partly positioned at the front portion that is suitable for impacting golf of glof club head, and main part is connected to the afterbody of striking surface part.Striking surface partly has pole face circumference, and further comprises the middle section of the thickening with central circumference and the transitional region with transition circumference.The ratio of the central authorities total length of circumference and the total length of pole face circumference is greater than approximately 0.23 and be less than approximately 0.32.

By reference to the following drawings, explanation and claim will be understood these and further feature, aspect and advantage of the present utility model better.

Accompanying drawing explanation

Describe below with reference to the accompanying drawings the utility model, aforesaid and other the feature and advantage of the utility model can be clearer.Accompanying drawing that here comprised and that form a part for description is further explained principle of the present utility model, and can make those skilled in the relevant art manufacture and use the utility model.

Fig. 1 illustrates according to the perspective view of the glof club head of the utility model exemplary embodiment;

Fig. 2 illustrates according to the front view of the glof club head of the utility model exemplary embodiment;

Fig. 3 illustrates the viewgraph of cross-section along the transversal A-A ' intercepting in Fig. 2 according to the glof club head of the utility model exemplary embodiment;

Fig. 4 illustrates the viewgraph of cross-section along the transversal B-B ' intercepting in Fig. 2 according to the glof club head of the utility model exemplary embodiment;

Fig. 5 illustrates the rearview of the glof club head of incision, and it has represented according to the striking surface of the utility model exemplary embodiment;

Fig. 6 illustrates the diagrammatic representation with " sweet spot " that be associated according to the glof club head of the utility model exemplary embodiment;

Fig. 7 illustrates the rearview of the glof club head of incision, and it has represented the striking surface of prior art glof club head;

Fig. 8 illustrates the diagrammatic representation of the sweet spot being associated with prior art glof club head;

Fig. 9 illustrates the rearview of the glof club head of incision, and it has represented the striking surface according to alternate embodiment of the present utility model;

Figure 10 illustrates the rearview of the glof club head of incision, and it has represented the striking surface according to another alternate embodiment of the present utility model; And

Figure 11 illustrates the rearview of the glof club head of incision, and it has represented the striking surface according to another alternate embodiment of the present utility model.

Specific embodiment

The best expection mode of current enforcement the utility model has been described in detailed description below.Because scope of the present utility model clearly limits by claims, description therefore below should not be construed as restriction scope of the present utility model, and is only used to explain the object of general principle of the present utility model.

Multiple originality feature is described below, and each can use or be combined with further feature independently of one another.Yet any single originality feature all possibly cannot solve one or whole issue of above-mentioned discussion, in other words only to solve one of problem of above-mentioned discussion.Say further, any one following feature possibly cannot solve one or more problems of above-mentioned discussion completely.

Fig. 1 in accompanying drawing illustrates according to the perspective view of the glof club head 100 of the utility model exemplary embodiment.Glof club head 100 shown in Fig. 1 can have striking surface part 102 and main part 104 conventionally, striking surface is partly positioned at the front portion that is suitable for impacting golf (not shown) of glof club head 100, and main part is connected to the afterbody of striking surface part 102.The main part 104 of glof club head 100 can have top 106, bottom 108 and skirt section 110 conventionally to gather each parts of (round up) glof club head 100.Although invisible from the outside, but the striking surface part 102 of glof club head 100 can have unique internal geometrical characteristics conventionally, it changes the thickness of striking surface part 102 in the relevant mode of size, shape and geometric properties with striking surface part 102 self.

In order to inspect more nearly the internal geometrical characteristics of striking surface part 102, must first limit the viewgraph of cross-section of glof club head 100.Fig. 2 in accompanying drawing illustrates the front view of glof club head 200, and it provides the straightforward procedure that limits necessary viewgraph of cross-section.Or rather, Fig. 2 is illustrated in top to the transversal A-A' that strides across vertically the geometric center 214 of striking surface 202 in the direction of bottom.Except foregoing, Fig. 2 is also illustrated in heel to the transversal B-B ' that flatly strides across the geometric center 214 of striking surface 202 in the direction of toe.It is worth mentioning, it is more lip-deep that the geometric center 214 of striking surface 202 can generally refer to striking surface 202 herein, and it illustrates the central point in striking surface 202.

Fig. 3 in accompanying drawing illustrates the glof club head 200 shown in Fig. 2 along the viewgraph of cross-section of transversal A-A' intercepting.The viewgraph of cross-section of the glof club head 300 shown in Fig. 3 allows to show the geometric properties of the variable thickness of being covered by striking surface 302.Or rather, striking surface 302 can have middle section 320, interior transitional region 322 and the outer transitional region 324 of thickening conventionally.As shown in this exemplary embodiment at present, the thickness d 1 of the middle section 320 of thickening can be greater than about 3.10mm conventionally, is more preferably greater than about 3.40mm, and is most preferably greater than about 3.70mm.As shown in this exemplary embodiment at present, interior transitional region 322, along with its geometric center 314 away from striking surface 302, can reduce gradually conventionally on the thickness of striking surface 302.Should be noted that, in this current exemplary embodiment of the utility model, interior transitional region 322 in the vertical directions are asymmetric herein.In fact, in top, transitional region 322a can be conventionally thick than transitional region 322b in bottom.Or rather, in the top at close striking surface 302 tops, the thickness d 2 of transitional region 322a can reduce to about 2.70mm gradually from about 3.60mm, more preferably from about 3.60mm, reduces to about 2.60mm, most preferably from about 3.60mm, reduces to about 2.50mm.Thickness d 3 near transitional region 322b in the bottom of striking surface 302 bottoms can reduce to about 2.60mm gradually from about 3.60mm, more preferably from about 3.60mm, reduces to about 2.50mm, most preferably from about 3.60mm, reduces to about 2.40mm.

Similar with interior transitional region 322, outer transitional region 324 in the vertical directions are also asymmetric.Outside top, transitional region 324a can be conventionally thick than transitional region 324b outside bottom.Or rather, outside the top at close striking surface 302 tops, the thickness d 4 of transitional region 324a can be transitioned into about 2.73mm from about 2.70mm conventionally, more preferably from about 2.60mm, is transitioned into about 2.63mm, and most preferably from about 2.50mm, is transitioned into about 2.53mm.Thickness d 5 near transitional region 324b outside the bottom of striking surface 302 bottoms can be transitioned into about 2.58mm from about 2.60mm conventionally, more preferably from 2.50mm, is transitioned into 2.48mm, and most preferably from about 2.40mm, is transitioned into 2.38mm.Based on above-mentioned various thickness d 1, d2, d3, d4 and d5, can find out, striking surface 302 shown in this exemplary embodiment of the present utility model can have thicker top, thinner bottom, they and middle section 320 combinations of thickening, to contribute to form the geometry of the best performance that makes glof club head 300.In other words, can say in portion transitional region 324a outside transitional region 322a and top is bonded to each other, to form catenary near the top of striking surface 302, and the bottom in outside transitional region 322b and bottom transitional region 324b be formed on and on thickness, stablize the curve reducing.

Fig. 4 in accompanying drawing illustrates the viewgraph of cross-section along the horizontal transversal B-B ' intercepting shown in Fig. 2 according to the glof club head 400 of the utility model exemplary embodiment.Similar with the cross section shown in Fig. 3, Fig. 4 illustrates the striking surface 402 of glof club head 400, and it has middle section 420, interior transitional region 422 and the outer transitional region 424 of thickening.Although it is thicker than the bottom of striking surface 302 that Fig. 3 illustrates the top of striking surface 302, along heel, to toe direction, might not there is identical phenomenon.Therefore, the thickness d 6 of interior transitional region 422 and d7 can reduce to about 2.50mm from about 3.60mm conventionally, more preferably from about 3.60mm, reduce to about 2.45mm, most preferably from about 3.60mm, reduce to about 2.40mm.Correspondingly, the thickness d 8 of outer transitional region 424 and d9 can reduce to about 2.35mm from about 2.70mm conventionally, more preferably from about 2.65mm, reduce to about 2.0mm, most preferably from about 2.60mm, reduce to about 2.25mm.，

It should be noted that in Fig. 3 and 4,

glof club head

300 and 400 viewgraph of cross-section illustrate the thickness of

striking surface

302 and 402 from the middle section 320 of thickening and the transition gradually of 420 peripheries towards striking surface 302 and 402.As shown in current this exemplary embodiment, by combine interior transitional region 322 and 422 and outer transitional region 324 and 424 realize the transition gradually of the thickness of striking surface 302 and 402.On the whole

striking surface

302 and 402 of glof club head, having transition is gradually favourable to the performance of

glof club head

300 and 400, because it has obviously reduced the position of the stress increasing, allow

striking surface

302 and 402 to make thinner, with from

glof club head

300 and 400 savings in weight.

Before discussion about size, shape and the geometric properties of striking surface part in carrying out Fig. 5, confirm that the key Design feature that the respective thickness by zones of different presents is important.First, from content above, can find out,

middle section

320 and 420 thickness are in response to

perimeter region

332a, 322b, 324a, 324b, 422 and 424 thickness attenuation and increase.Each area thickness is controlled, to defer to the rule relevant with maximum CT value that allowed in glof club head USGA and regulation, because make blindly perimeter region attenuation meeting make the CT value of glof club head central portion office by mistake be increased to the value over the maximum allowable value under USGA's rule and regulation.Therefore, in order to control CT value, the utility model seeks to increase the thickness of

middle section

320 and 420, to alleviate the baneful influence being associated with the attenuation of perimeter region.

In order to obtain, to make perimeter region attenuation and make the appropriate balance between middle section thickening, the utility model has obtained the special relationship between the thick of striking surface part and the thinnest part of striking surface part, and the face thickness that this special relationship is represented by equation (1) is below recently quantitative:

The thinnest part of thick/striking surface part of face thickness ratio=striking surface part

According to the face thickness ratio of the glof club head of the utility model exemplary embodiment, can be greater than generally approximately 1.20 and be less than approximately 1.80, more preferably be greater than approximately 1.30 and be less than approximately 1.75, most preferably be greater than approximately 1.45 and be less than approximately 1.70, all these situations all do not depart from scope of the present utility model and content.Having face thickness in above-mentioned limited range, to be compared to according to the proper function of striking surface part of the present utility model be important, because each thickness that it is intended to make each region balance rightly, to utilize the feature performance benefit of current utility model.

Be worth to discuss, in current exemplary embodiment, the material that can be used to form striking surface by changes completes and in the situation that not sacrificing durability, makes striking surface perimeter region attenuation partly herein.In the current exemplary embodiment of the utility model, the titanium of useful low-density and high-strength forms striking surface, the titanium of low-density and high-strength is that all these does not depart from scope of the present utility model and content such as alpha-beta alloy, nearly beta alloy or beta alloy even.Or rather, striking surface can be by alpha-beta alloy, nearly beta alloy and beta alloy form, alpha-beta alloy is the ATI-425 titanium such as Allegheny Technologies Ink, the 54M titanium of Time, or the Ti-9 of Kobe Steel, nearly beta alloy is the SP-700EXHM of JEFSteel for example, the Ti-18 of Time or the Ti-629 of Time, beta alloy is the 15-3-3-3 such as Time, the 15-3-3-3 of Daido Steel, the 15-5-3 of Kobe Steel, the 15-0-3 of Kobe Steel, the DAT51 of Daido Steel, the DAT55G+ of Daido Steel, the Ti-354 of the Coati of Daido Steel or Advanced Materials Technology, all these does not depart from scope of the present utility model and content.

Merging above-mentioned material can provide the huge feature performance benefit of the standard Ti-6-4 that is better than current use generally, because a lot of advanced materials of above-mentioned reference provide superior density and strength characteristics, this can help to obtain above-mentioned extreme thickness.Except foregoing, can the nearly beta alloy of heat treatment and beta alloy, take by crystal structure transition is further improved to performance as alpha-crystal structure.

Finally, in order to make striking surface there is enough durabilities and enough intensity, should make the surface roughness of material minimum.According to the surface roughness of striking surface of the present utility model, can conventionally be less than approximately 100 microns of roughness, more preferably be less than approximately 80 microns of roughness, even more preferably be less than 60 microns of roughness, and most preferably be less than 40 microns of roughness.Can conventionally by for example chemical milling, rolling medium (tumble media), numerically controlled lathe, grinding, the method for polishing or any combination of said method, reduce surface roughness, all these does not depart from scope of the present utility model and content.

Fig. 5 provides the last part of solution clearly to limit according to size, shape and the geometric properties of the striking surface 502 of exemplary embodiment of the present utility model.Or rather, the Fig. 5 in accompanying drawing illustrates the rearview of the glof club head at the rear portion that is cut open to show striking surface 502.As shown in Figure 5, striking surface 502 can conventionally have the thickening that comprises central circumference 521 middle section 520, comprise the interior transitional region 522 of interior transition circumference 523 and the outer transitional region 524 that comprises outer transition circumference 525.Should be noted that the length of the outer transition circumference 525 showing in current exemplary embodiment of the present utility model can be generally equal to the length of the circumference of striking surface 502, because striking surface 502 thickness in leading to the circumference process of striking surface 502 reduces continuously.Therefore,, in the application's description, term striking surface edge 525 can exchange and use with outer Transition edges 525, and does not depart from scope of the present utility model and content.

As shown in exemplary embodiment as current in the utility model in Fig. 5, be conventionally difficult to limit to vision the border of pole face circumference 525 from the rearview of striking surface 502.Therefore, be worth taking time herein and clearly limit the border of pole face circumference 525, because it contributes to limit size, shape and the geometric properties of middle body 520 of the thickening of striking surface 502.Pole face circumference 525 can conventionally be defined as striking surface 502 before impact portion boundary, its border is hit by the frontal plane that substantially departs from striking surface 502 radius of curvature of taking taxi and is limited.Because the hosel of striking surface 502 part can not comprise that substantially departing from plane hits the radius of curvature of taking taxi, the part of pole face circumference 525 can be estimated by smooth curvature generally, the terminal limiting of this smooth curvature formation pole face circumference 525.

Since set up the border of pole face circumference 525, so can limit now the relation between pole face circumference 525 and central circumference 521.As previously mentioned, size, shape and the geometric properties of the middle section 520 of thickening and size, shape and the geometric properties of striking surface 502 are substantially similar, and their relations relative to each other contribute to quantize the performance gain of glof club head.Between the middle section 520 of thickening and striking surface 502 size, shape and geometric properties similar, the size of interior transitional region 522, shape and geometric properties are also similar to striking surface 502.In the current exemplary embodiment of the utility model, the length of central circumference 521 can conventionally be greater than about 65mm and be less than about 80mm, is more preferably greater than about 70mm and is less than about 75mm, is most preferably about 73mm.On the other hand, the length of pole face circumference 525 can be greater than generally about 250mm and be less than about 280mm, is more preferably greater than about 260mm and is less than about 270mm, is most preferably about 265mm.

The valuation of above-mentioned different circumferential length provides very important relation between central circumference 521 and pole face circumference 525.Or rather, based on foregoing, can sum up, the ratio of the length of the length of central circumference 521 and pole face circumference 525 can be greater than approximately 0.23 and be less than approximately 0.32 generally, is more preferably greater than approximately 0.26 and be less than approximately 0.28, is most preferably approximately 0.27.Central authorities' circumference 521 is very important for the performance of glof club head with the ratio of pole face circumference 525, because it controls the size of the middle section 520 of thickening, and this controls the size of sweet spot.

Except various geometrical relationships discussed above, the size of the middle section 520 of thickening is also important for the performance of the striking surface 502 of glof club head.Or rather, as can be seen from Fig. 5, conventionally wish that the size of the middle section 520 of thickening is significantly less than the overall size of the striking surface 502 being limited by pole face circumference 525.The size of the striking surface 502 that the size of the middle section 520 of the thickening being limited by interior transitional region 522 can limit in the length by pole face circumference 525 generally approximately 20% to approximately 40%, more preferably the size of pole face circumference 525 approximately 25% to approximately between 35%, be most preferably approximately 30% of pole face circumference 525.

Finally, be worth recognizing, the rearview of the striking surface 502 shown in Fig. 5 illustrates the relation of the middle section 520 of thickening and the geometry of striking surface 502 herein.Or rather, the middle section 520 that the Fig. 5 in accompanying drawing illustrates thickening all has the geometric properties substantially similar to the geometric properties of pole face circumference 525 with interior transitional region 522.In other words, central circumference 521 can all form the geometry substantially similar to the geometry of pole face circumference 525 with interior transition circumference 523.Importantly recognize herein, the shape of middle section 520 and the substantially similar performance for glof club head of the geometry of whole striking surface 502 of thickening are favourable, because it allows striking surface 502 to be offset more equably along all directions, to produce larger " sweet spot ".Although be typically used as the desirable index of golf clubs performance in golf industry, " sweet spot " is seldom defined in the mode that is easy to quantize.Therefore, at the such improvement geometric properties of middle section 520 by thickening, quantize in the trial of performance gain of current utility model, " sweet spot " is defined as 98% the part that can reach biggest ball speed of described striking surface 502, and this ball speed is by producing with the shock of golf.

Fig. 6 in accompanying drawing illustrates the diagrammatic representation with respect to the sweet spot 630 shown in the pole face center 614 of glof club head.As can be seen from Figure 6, by sweet spot 630 around region can surround generally pole face center 614, and present substantially elliptical.Except having roughly oval shape, the area being covered by this sweet spot 630 can be greater than about 45mm generally ², be more preferably greater than about 46.5mm ², be most preferably greater than about 48.0mm ².The sweet spot that highlights this amplification is important, because it has directly quantized the performance gain of the creative glof club head of current the utility model, this performance gain is attributable to improved size, shape and the geometric properties of the middle section 520 of thickening.This larger sweet spot is preferred, because it is provided for the larger region of batting for golfer, and still obtains and perfection impacts the essentially identical result of golf.

For comparison purposes, Fig. 7 in accompanying drawing and 8 illustrates the rearview of prior art glof club head, and the diagrammatic representation of the sweet spot being associated with such prior art glof club head.In Fig. 7, although in fact the prior art glof club head has the striking surface 702 of the middle section 720 that comprises thickening, with the random round-shaped of the inconsistent central circumference 721 of geometric properties of pole face circumference 725, the size to sweet spot is caused to negative effect.Therefore, forward Fig. 8 to, we can see, the size of the sweet spot 830 of the prior art glof club head is significantly less than the size of the sweet spot 630 of the utility model glof club head.In fact, the size of this sweet spot 830 can be less than about 35mm generally ², be more preferably less than about 30mm ², and be most preferably less than about 27mm ².

Fig. 9 in accompanying drawing illustrates according to the rearview of the glof club head of the utility model alternate embodiment, and wherein, the geometry of the middle section 920 of thickening and the geometry of striking surface circumference 925 are substantially similar.In the of the present utility model current exemplary embodiment shown in Fig. 9, can see, although the geometric properties of central circumference 921 of the middle section 920 of thickening is not identical with the pole face circumference 925 of striking surface 902, in the situation that not departing from scope of the present utility model and content, still can think substantially similar.Or rather, the term " substantially similar " of current the utility model definition does not need absolutely consistent, and as long as shape is roughly similar each other.

Figure 10 in accompanying drawing provides according to the rearview of the striking surface 1002 of the glof club head of the utility model alternate embodiment.Although the middle section 1020 of the thickening of this embodiment can have than the more oval difformity of ellipse shown in above, this shape is still substantially similar with the elliptic geometry shape of pole face circumference 1025.With discussed above similar, in order to maximize the performance of the striking surface 1002 of glof club head, control geometry to striking surface 1002 relevant rather than be important as the geometry of the middle section 1020 of the thickening of independent shapes.To above-mentioned similar, in the situation that not departing from scope of the present utility model and content, the ratio of the central authorities length of circumference 1021 and the length of pole face circumference 1025 can be greater than approximately 0.23 and be less than approximately 0.32 generally, is more preferably greater than approximately 0.26 and be less than approximately 0.28, and is most preferably about 0.27.

Figure 11 in accompanying drawing provides according to the rearview of the striking surface 1102 of the glof club head of the utility model alternate embodiment.Although the middle section 1120 of the thickening of this embodiment can have than the round difformity of circle shown in above, this shape is still similar to the circular geometry of pole face circumference 1125.As discussed above, in order to maximize the performance of the striking surface 1102 of glof club head, control geometry with striking surface 1102 relevant rather than be important as the geometry of the middle section 1120 of the thickening of independent shapes.To above-mentioned similar, in the situation that not departing from scope of the present utility model and content, the ratio of the central authorities length of circumference 1121 and the length of pole face circumference 1125 can be greater than approximately 0.23 and be less than approximately 0.32 generally, is more preferably greater than approximately 0.26 and be less than approximately 0.28, and is most preferably approximately 0.27.

Except in operation example, unless or had other to clearly state, number range, amount, numerical value and percentage in the above-mentioned part of description, such as the quantity of those materials, rotary inertia, gravity position, sphere inclination angle, draft angle, various Performance Ratio and other can be understood as above with " approximately " word, even if term " about " clearly occurs in numerical value, amount or scope.Therefore, unless represented on the contrary, the numerical parameter of listing in description and claims is approximation, and its variation depends on that the utility model seeks the expected performance obtaining.The application does not attempt restriction and doctrine of equivalents is applied to the scope of claim, and each numerical parameter at least should make an explanation according to the significant digits that provide and by rounding up.

Although describing number range and the parameter of the utility model wide region is approximation, in particular example, the numerical value proposing should as far as possible accurately be described.Yet any number comprises certain error in essence, these errors are produced by the standard deviation existing in their measurements separately.And, when listing the codomain of different range at this, be readily appreciated that, can use any combination of these numerical value that comprise described numerical value.

Certainly, it should be understood that, in the situation that do not depart from the utility model spirit and scope that limit as stated claim below, can relate to exemplary embodiment of the present utility model and modify aforementioned.

The cross reference of related application

The application is the part continuation application of the U.S. Patent application No.12/972807 of common pending trial, and the disclosure of this application is all incorporated to herein as quoting.

Claims

1. a glof club head with top, bottom and skirt section, comprising:

Striking surface part, is positioned at the front portion that is suitable for impacting golf of described glof club head, and described striking surface has pole face circumference; And

Main part, is connected to described striking surface afterbody partly,

It is characterized in that, described striking surface part further comprises:

The middle section of thickening, has central circumference; And

Transitional region, has transition circumference,

The geometry of the geometry of described central circumference and described pole face circumference is similar; And

The face thickness ratio of described striking surface part is greater than approximately 1.20 and be less than approximately 1.80,

Described face thickness is than the ratio of thickness of the thinnest part partly of thickness and described striking surface that is defined as the thick of described striking surface part.

2. glof club head according to claim 1, is characterized in that, described face thickness ratio is greater than approximately 1.30 and be less than approximately 1.75.

3. glof club head claimed in claim 2, is characterized in that, described face thickness ratio is greater than approximately 1.45 and be less than approximately 1.70.

4. glof club head according to claim 1, is characterized in that, the geometry of described central circumference is identical with the geometry of described pole face circumference.

5. glof club head according to claim 4, is characterized in that, the ratio of the total length of the total length of described central circumference and described pole face circumference is greater than approximately 0.23 and be less than approximately 0.32.

6. glof club head according to claim 5, is characterized in that, the ratio of the total length of the total length of described central circumference and described pole face circumference is greater than approximately 0.26 and be less than approximately 0.28.

7. glof club head according to claim 6, is characterized in that, the ratio of the total length of the total length of described central circumference and described pole face circumference is approximately 0.27.

8. glof club head according to claim 5, is characterized in that, the total length of described central circumference is greater than about 65mm and is less than about 80mm.

9. glof club head according to claim 8, is characterized in that, described striking surface part is made by beta-titanium alloy.

10. glof club head according to claim 8, is characterized in that, described striking surface part is made by alpha-beta titanium alloy.

11. glof club heads according to claim 8, is characterized in that, described striking surface part is made by near β titanium alloy.

12. 1 kinds of glof club heads, comprising:

Main part, is connected to described striking surface afterbody partly,

It is characterized in that, described striking surface part further comprises:

The middle section of thickening, has central circumference; And

Transitional region, has transition circumference,

The size of the sweet spot of the described striking surface part of described glof club head is greater than about 45mm ²;

Described sweet spot is defined as 98% the region that can obtain biggest ball speed of described striking surface part, and this ball speed is by producing with the shock of described golf.

13. glof club heads according to claim 12, is characterized in that, the described size of described sweet spot is greater than about 46.5mm ².

14. glof club heads according to claim 13, is characterized in that, the described size of described sweet spot is greater than about 48mm ².

15. glof club heads according to claim 12, is characterized in that, the face thickness ratio of described striking surface part is greater than approximately 1.20 and be less than approximately 1.80;

16. glof club heads according to claim 15, is characterized in that, described face thickness ratio is greater than approximately 1.30 and be less than approximately 1.75.

17. glof club heads according to claim 16, is characterized in that, described face thickness ratio is greater than approximately 1.45 and be less than approximately 1.70.

18. glof club heads according to claim 15, is characterized in that, described transitional region is thick in the bottom of described striking surface at the top of described striking surface ratio, and catenary has been formed at the top of close described striking surface.

19. glof club heads according to claim 18, is characterized in that, only the described top of described striking surface produces described catenary.

20. glof club heads according to claim 12, is characterized in that, the surface roughness of described striking surface is less than approximately 60 microns of roughness.