JP2000126337A - Golf club set of iron - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club set with reinforced ball hitting faces in long irons without losing a moment of inertia when hitting a ball, a good feeling of hitting the ball from middle irons to short irons, and facilitating a ball hitting operation around a gravity center of a head. SOLUTION: A golf club set of iron comprises long irons, middle irons, and short irons, and is provided with a cavity 34 leaving a periphery portion 31d-1 of a back portion 31d on each head 31. In this set, a thick portion 37 is provided with the most thickest among other portions of the cavity 34, corresponding to a sweet spot of the head 31 in the cavity 34 of each head 31. Moreover, the thickness of the thick portion 37 becomes thicker, corresponding to an increased number of the irons from the long irons, to the middle irons and to the short irons.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron golf club set.

[0002]

2. Description of the Related Art Generally, an iron golf club set includes a long iron of 4 or less, a middle iron of 5 to 7 and a short iron of 8 and 9 and a pitching wedge and a sand wedge. ,
The long iron has a longer club length than the middle iron and short iron so that the ball can travel a longer distance, and as the iron goes up to the middle iron and the short iron, a sharp shot with sharp spin is sharpened. The loft angle of the head is set to be large so as to be possible, and the shaft is set short to emphasize controllability.

Conventionally, an iron club head has a hosel portion and a face portion integrally formed of a metal such as soft iron, stainless steel, titanium or the like to have a shape adapted to each count. There are known two types of heads, namely, a type in which a face portion called a plain back is made thicker, and a type called a cavity back in which a cavity is provided in a back portion.

[0004] The plain-back head has a thick hitting surface at the face portion, so that the hitting feeling is good (such as whether the ball is hit at a sweet spot or whether the hitting surface is correctly oriented in the direction of the ball, etc.). ) Has the advantage that the head of the cavity back has a cavity in the back portion, so that the weight of the head is distributed to the peripheral portion, so that the moment of inertia at the time of hitting the ball increases. This has the advantage that the head does not shake when hitting a ball as compared with a plain back head, and the directionality of the hitting ball is particularly stable with a long iron.

[0005] In recent years, the cavity back type has been widely used in accordance with the enlargement of the head. However, in recent years, the cavity back head has a face corresponding to the cavity as compared with the conventional one in order to reduce the weight. The striking surface of the portion is formed to be thin. For this reason, the thin ball striking surface tends to vibrate when hitting, and the state of the hit ball is not clearly transmitted to the player as compared with the plain back head,
Further, there is a possibility that the strength of the striking surface is reduced as compared with a plain back or conventional cavity back head.

Therefore, in order to compensate for such a drawback of the cavity back head, Japanese Patent Application Laid-Open No. 10-5377 discloses that the thickness of the hitting surface corresponding to the cavity 3 provided in the back portion 1 as shown in FIG. In the thin head 5 having a thickness of 1 mm or more and less than 2 mm, a width 4 mm
A golf club 9 in which a reinforcing member 7 made of a soft iron plate having a thickness of 2 mm is vertically fixed through a ball striking center S
Is disclosed.

However, in this conventional example, no consideration is given to a set, and if the design is unified as a set, the same reinforcing member 7 is fixed in the cavity 3 from the long iron to the short iron. It has been pointed out that, depending on the set, the moment of inertia of the long iron at the time of hitting the ball is small and the directionality of the hit ball is deteriorated.

[0008] Also, Japanese Patent Application Laid-Open No.
12 and the thickness T ₂ of the ball striking face 13 of the short iron head 11 as shown in FIG. 13 are formed in a conventional manner striking face 17 of the head 15 in accordance with count from the short irons to long irons decreases golf club set of cavity back, which gradually reduces the thickness T ₁ have been disclosed.

[0009]

According to this golf club set, while the moment of inertia at the time of hitting a long iron is increased and the directionality of the hit ball is stabilized,
The striking surface 17 of the face portion 21 corresponding to the cavity 19
Is formed thinner than before, and therefore has the disadvantage that the strength of the striking face 17 is reduced as described above.

On the other hand, in the short iron head 11 shown in FIG. 13, the hitting surface 13 of the face portion 25 corresponding to the cavity 23 is thicker than the long iron, so that the shot feeling is good, and While the strength of the surface 13 can be secured, the hitting surface 13 has a uniform thickness, so the head 11 is intentionally returned around the center of gravity of the head 11 at the time of hitting, and the direction of the hitting surface is adjusted to accurately. It is pointed out that it is difficult to operate the ball to aim in the direction.

The present invention has been devised in view of the above circumstances, and aims at reinforcing the ball striking face of the face portion of a long iron without impairing the moment of inertia at the time of hitting a ball, and also from a middle iron to a short iron. It is an object of the present invention to provide an iron golf club set in which a hitting operation centering on the center of gravity of a head can be easily performed while maintaining a good hitting feeling throughout.

[0012]

In order to achieve the above object, the invention according to claim 1 comprises a long iron, a middle iron and a short iron, and a cavity is formed on a back portion of each head while leaving its peripheral portion. In the iron golf club set provided with, in the cavity of each of the heads, a thick portion having a greater thickness than other portions in the cavities is formed in correspondence with the sweet spot of the head, The thickness of the thick portion is increased as the iron count increases from a long iron to a middle iron to a short iron.

The invention according to claim 2 is based on claim 1
In the iron golf club set described in the above, the thick portion is provided continuously to the peripheral portion of the cavity,
According to a third aspect of the present invention, in the iron golf club set according to the second aspect, the thick portion is formed between the peripheral portions of the cavity. According to a fourth aspect of the present invention, in the iron golf club set of the first aspect, the thick portion is formed so as to be separated from a peripheral portion of the cavity.

(Action) According to the golf club set according to each claim, the head portion of the long iron has a thinner portion than the middle iron or the short iron,
The thick portion does not impair the moment of inertia at the time of hitting the ball. For this reason, the head has large moments of inertia on the top side, the sole side, the toe side, and the heel side at the time of hitting the ball, and the head does not shake even if the sweet spot is slightly removed and the ball is hit.

The thick portion reinforces the hitting surface, and the thick portion suppresses the vibration of the hitting surface. Also, as the count increases to middle iron and short iron, the thick part is formed in order of thickness, so that the shot feeling is good when hitting at the sweet spot, and other hits excluding the thick part Since the surface is thin, it is easy to intentionally return the head around the center of gravity of the head. Therefore, by adjusting the direction of the ball striking surface, the ball can be hit in the direction aimed at the ball.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 are a rear view and a cross-sectional view of a long iron (third iron) head according to the first embodiment of the present invention. FIG. 3 is a middle iron (fifth iron) head. Cross section of and
FIG. 4 is a cross-sectional view of a short iron (8-iron) head. As in the conventional case, each of the heads 31 to 33 has a hosel portion 31a to 33a and a face portion 31b to 33.
b, the sole portions 31c to 33c and the like are integrally formed of soft iron, stainless steel, titanium or the like, and the loft angle increases as the iron count increases from long irons to middle irons and short irons.

Then, like the conventional cavity back head, the back portions 31d to 33d of the heads 31 to 33 are provided.
Are formed with cavities 34 to 36, respectively, leaving peripheral portions 31d-1 to 33d-1, and hitting surfaces 31b-1 to 33b of face portions 31b to 33b corresponding to the cavities 34 to 36, respectively. -1 is 2 mm in thickness.

As shown in FIG. 1, in the cavity 34 of the head 31, a peripheral portion 31d-1 in the top and sole directions corresponding to the sweet spot SS of the face portion 31b.
In between, a thick portion 37 having a substantially Z-shaped outer shape in which both sides 31d-1 are formed wide is formed continuously and integrally with both top and sole sides 31d-1. Along with
In the cavities 35, 36 of the heads 32, 33, thick portions 38, 39 having the same outer shape as the thick portion 37 correspond to the sweet spot SS, and have peripheral edges 32d in the top and sole directions, respectively. -1, 33d-1 are integrally formed.

The thick portions 37 to 39 are provided so as to cover at least a region having a radius of 5 mm around the sweet spot SS. As shown in FIGS. 2 to 4, the thick portions 37 to 39 are formed so as to be sequentially thicker from the top side to the sole side. As the iron count increases from long irons to middle irons and short irons, including irons of other irons (not shown), the thickness of the thick portions 37 to 39 is set to be the same on the top side and the sole side is ironed. It is characterized in that it is sequentially increased every time.

The top and bottom ends of the thick portions 37 to 39 are formed thinner than the peripheral portions 31d-1 to 33d-1, respectively. Since the present embodiment is configured as described above, when a ball is hit with an iron club to which each of the heads 31 to 33 is attached, a long iron head 3 is used.
In No. 1, since the thick portion 37 is thinner than a middle iron or a short iron, the thick portion 37 does not impair the moment of inertia when hitting a ball.

For this reason, as in the prior art, the head 3
No. 1 has large moments of inertia on the top side, the sole side, the toe side, and the heel side, and the head 31 does not blur even if the sweet spot SS is slightly removed and the ball is hit. And the thick part 37 reinforces the striking surface 31b-1,
In addition, the thick portion 37 suppresses the vibration of the striking surface 31b-1.

Further, as the count increases to the middle iron and the short iron, the thick portions 38 and 39 are sequentially formed to be thicker, so that when hitting with the sweet spot SS, the shot feeling is good and the thickness is increased. Since the other striking surfaces 32b-1 and 33b-1 except for the meat portions 38 and 39 are thin,
As compared with the conventional example shown in FIG. 13, the heads 32 and 33 are easily returned intentionally around the center of gravity of the heads 32 and 33.
By adjusting the directions of the striking surfaces 32b-1 and 33b-1, the ball can be hit in the direction aimed at.

As described above, in the present embodiment, the thickened portions 37 to 39 are provided in the cavities 34 to 36 without impairing the characteristics of the cavity back, and the striking surfaces 31b-1 to 33b-1 are provided.
As a result, the ball striking surface can be prevented from being damaged over all counts, and the head 31 is not deflected in the long iron, so that the direction of the ball is excellent, and from the middle iron to the short iron. While maintaining a good feel at impact, the head 3 is intentionally centered on the center of gravity of the heads 32 and 33.
2 and 33 are returned, and there is an advantage that the ball hitting operation for easily aiming the direction by adjusting the directions of the hitting surfaces 32b-1 and 33b-1 is facilitated.

In the above embodiment, as the iron count increases from a long iron to a short iron, the thick portion 3
Although the thickness of 7 to 39 was sequentially set to the thickness of each iron, the thickness of the thick portion may be changed for each of the short iron, the middle iron and the long iron. It is possible to achieve the intended purpose.

FIGS. 5 and 6 are a rear view and a sectional view of a long iron (third iron) head according to the second embodiment of the present invention, and FIG. 7 is a middle iron (fifth iron). 8) shows a cross-sectional view of a head of short iron (8-iron). Each of the heads 41 to 43 according to the present embodiment also includes hosel portions 41a to 43a and face portions 41b to 43b. , Soles 41c to 43c are integrally formed of soft iron, stainless steel, titanium or the like, and the loft angle increases as the iron count increases from long iron to middle iron to short iron.

The back portion 41d of each of the heads 41-43
To 43d are respectively formed with cavities 44 to 46 except for the peripheral portions 41d-1 to 43d-1, and the striking surfaces 41b-1 to 43b-1 corresponding to the cavities 44 to 46, respectively.
Each has a thickness of 2 mm. As shown in FIGS. 5 to 8, in the present embodiment, the cavities 44 to 46 of the heads 41 to 43 are replaced with the shapes of the thick portions 47 to 49.
Inside, each corresponding to the sweet spot SS,
Over the peripheral edges 41d-1 to 43d-1 in the sole direction, the same straight-shaped thick portions 47 to 49 having a uniform thickness are formed integrally along the face portions 41b to 43b, and As shown in FIG. 6 to FIG.
The thicknesses (m ₇ ) to (m ₉ ) of ₉ are 1 mm, 2 mm, and 3 m, respectively.
The thickness of the thick portion is sequentially increased for each count as the count increases from long irons to middle irons and short irons, including irons of other counts (not shown).

In this embodiment, the thick portions 47 to
The top and sole sides of 49 are peripheral portions 41d-1 to 4
3d-1 is formed to be thinner and thicker portions 47 to 49 are formed.
Is provided so as to cover at least a region with a radius of 5 mm centered on the sweet spot SS. Thus, even with the iron club to which the heads 41 to 43 according to the present embodiment are attached, the thick section 47 of the long iron head 41 is thinner than that of the middle iron or the short iron. 47 does not impair the moment of inertia at the time of hitting the ball, and the thicker portions 48 and 49 are formed thicker as the iron count increases to middle iron and short iron. The shot feeling 42b-1 and 43b-1 other than the thick portions 48 and 49 are thin,
As compared with the conventional example shown in FIG. 13, the heads 42 and 43 can be easily turned around intentionally around the center of gravity of the heads 42 and 43.

Therefore, according to the present embodiment, it is possible to prevent damage to the ball striking surface over all counts, and to prevent the head 41 from shaking in a long iron and to have excellent directionality of the ball striking. A hitting operation for intentionally turning the heads 42, 43 around the center of gravity of the heads 42, 43 and adjusting the direction of the hitting surface to accurately aim at the direction while maintaining a good shot feeling over the iron It has the advantage of being easy to remove.

FIG. 9 is a rear view of a long iron (third iron) head according to an embodiment of the present invention. In this embodiment, a cavity 53 provided in a back portion 51a of the head 51 is shown. A thick portion 55 having an elliptical cross section centered on the sweet spot SS is provided at a distance from the peripheral portion 51a-1, and the thick portion 55 is provided in all other iron iron cavities (not shown). A thick part having the same external shape as that of the above was formed corresponding to the sweet spot, and as the iron count increased from long iron to middle iron and short iron, the thickness of the thick part was sequentially increased for each iron count Things.

Thus, according to the present embodiment, the intended purpose can be achieved similarly to the above-described embodiments. In the embodiment shown in FIGS. 1 and 5, the thick portion 3
7, 47, the peripheral portion 31d- on the top and sole sides, respectively.
The thick portion 47-1 provided in the cavity 44 is formed in the cavity 44 as in the third embodiment shown in FIGS. The thick portion 47 is provided continuously only to the peripheral portion 41d-1 on the sole side.
A thick part having the same shape as that of -1 is provided in the cavity of the other irons (not shown), and the thickness of the thick part is increased for each iron as the iron rises from a long iron to a middle iron and a short iron. May be sequentially increased.

According to this embodiment, the intended purpose can be achieved similarly to the above embodiments.

[0032]

As described above, according to the present invention, it is possible to prevent the hitting surface from being damaged over all counts, and it is possible to prevent the head from being blurred in a long iron and to have a directivity of the hitting ball. To return the head intentionally around the center of gravity of the head while maintaining a good shot feeling from the middle iron to the short iron, and adjust the direction of the hitting surface to aim precisely in the direction Has an advantage that the hitting operation can be easily performed.

[Brief description of the drawings]

FIG. 1 is a rear view of a long iron head according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the head shown in FIG.

FIG. 3 is a sectional view of a head of a middle iron according to the first embodiment of the present invention.

FIG. 4 is a sectional view of a short iron head according to the first embodiment of the present invention.

FIG. 5 is a rear view of a long iron head according to a second embodiment of the present invention.

FIG. 6 is a sectional view of the head shown in FIG. 5;

FIG. 7 is a cross-sectional view of a middle iron head according to a second embodiment of the present invention.

FIG. 8 is a sectional view of a short iron head according to a second embodiment of the present invention.

FIG. 9 is a rear view of the head of the long iron according to the first and fourth embodiments;

FIG. 10 is a rear view of a long iron head according to a third embodiment of the present invention.

FIG. 11 is a rear view of a conventional cavity back iron club head.

FIG. 12 is a cross-sectional view of a long iron head in a conventional iron golf club set.

FIG. 13 is a cross-sectional view of a short iron head in a conventional iron golf club set.

[Explanation of symbols]

31, 32, 33, 41, 41-1, 42, 43, 51
Heads 31b, 32b, 33b, 41b, 42b, 43b Faces 31b-1, 32b-1, 33b-1, 41b-1, 42b-1,
43b-1 Impact surface 31d, 32d, 33d, 41d, 42d, 43d, 5
1a Back part 31d-1, 32d-1, 33d-1, 41d-1, 42d-1,
43d-1, 51a-1 peripheral part 34, 35, 36, 44, 45, 46, 53 cavity 37, 38, 39, 47, 47-1, 48, 49, 55
Thick part

Claims (4)

[Claims] 1. An iron golf club set comprising a long iron, a middle iron, and a short iron, wherein a cavity is provided on a back portion of each head except for a peripheral portion thereof. A thick portion having a greater thickness than other portions in the cavity is formed corresponding to the sweet spot of the head, and the thickness of the thick portion is changed from long iron to middle iron to short iron. The golf club set of the iron, which is enlarged as the height rises. 2. The iron golf club set according to claim 1, wherein the thick portion is connected to a peripheral portion of the cavity. 3. The iron golf club set according to claim 2, wherein the thick portion is formed between peripheral portions of the cavity. 4. The iron golf club set according to claim 1, wherein the thick portion is formed apart from a peripheral portion of the cavity.