JPH02264676A - Head for golf club - Google Patents

Abstract

PURPOSE:To retreat a gravity center position, to increase a gravity center depth and to enlarge a sweet area by forming a thickness between the bottom part of a recessed place at the rear surface side of a head main body and a sole so as to be larger than the thickness between the bottom part at a face side and the sole. CONSTITUTION:In the approximate center of a rear surface 15 of a head main body 13, a recessed place 16 to adjust the gravity center position of the head main body 13 is formed, its front surface 19 is provided approximately in parallel to a face 14, further, a bottom part 20 of the recessed part 16 is directed at the lower side of the face 14 so as to undercut a sole 21 side, and a thickness D between the sole 21 and the bottom part 20 in the rear surface 15 is formed larger than a height E between the sole 21 and the bottom part 20 in the face 14 side. As a result, a gravity center G of the head main body 13 can be set at a rear side further. For such a reason, a distance between the gravity center G and the face 14, namely, a gravity center depth F can be increased, and the sweet area can be enlarged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a golf club head such as an iron head.

[Prior Art] Conventionally, a head shown in FIG. 3 is well known as this type of head. This has a recess 5 for balance adjustment formed approximately in the center of the rear surface 4 of the head body 3 where the shaft 1 is connected to the neck 2.

[Solved by the Invention J: Problems of Dozing] In the prior art, the center of gravity of the head body 3 is lowered by making a large cut in the rear surface 4 of the head body 3 with the recess 5, and the distance between the center of gravity and the face 6 is reduced. The rope also attempts to increase the depth of the center of gravity.

However, in the prior art, since the thickness 8 between the bottom 7 of the recess 5 on the rear surface 4 side and the sole 8 is smaller than the thickness B between the bottom 7 and the sole 8 on the face 6 side, the small center of the head body 3 is set on the face 6 side, making it impossible to increase the depth of the center of gravity and therefore making it impossible to increase the sweet area.

SUMMARY OF THE INVENTION An object of the present invention is to provide a golf club head that solves the above-mentioned problems and allows a user to be more cautious.

[Means for Solving the Problems] The present invention provides a head in which a recess for balance adjustment is formed in one side of a head main body to which a shaft is connected, in which a recess is formed between the bottom of the recess on the rear side and the sole. The thickness is greater than the thickness between the bottom portion on the face side and the sole.

Function 1 By making the thickness on the rear side larger than the thickness on the face side, the center of gravity of the head can be placed further back, and the depth of the center of gravity can be increased.

[Example 1 Next, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1d3 and FIG. 2 show an embodiment of the present invention, and show an iron club 12 having a shaft 11 of a predetermined length, and a predetermined lie angle θ on the front surface of a head body 13 made of steel or the like. A recess 1G for adjusting the position of the center of gravity of the head body 13, etc. is formed in a substantially medium portion of the pattern 15 of the head body 13.

This recess 16 has a triangular cross section, and its opening width C
1 - is formed so that it becomes gradually narrower from the lug 17 side to the heel 18 side, and the front surface 19 of the recess 16 is provided approximately parallel to the face 14, and furthermore, the recess 1G
The bottom part 20 faces the lower end of the face 14 so that the sole 21 side is the undercut 1, and the thickness D between the sole 21 and the bottom part 20 on the rear surface 15 side is
The height E between the sole 21 and the bottom 20 on the fourth side is greater than the height E (DIE). 1) The four points 1G in item 4 are formed by cutting with a bi-jer having a predetermined cutting edge angle. Further, a lζ-th neck 22 for connecting the shaft 11 is integrally formed on one side of the head main body 13.

Next, the operation of the above structure will be explained.

Thickness D between bottom part 20 and sole 21 on J3 side on rear surface 15 side
The bottom 8I120 and the sole 21 have one on the face 14 side.
With the larger comb I, the center of gravity G of the head body 13 can be set further backwards. Therefore, the distance between the center of gravity G and the face 14, the depth of the center of gravity J, can be increased, and Sweet 1 I can't help but widen the rear.

As mentioned above, in an iron club, the head body 1
A recess 16 is formed approximately in the center of the rear surface 15 of 3, and this recess 1
By forming the thickness D on the rear surface 15 side to be larger than the thickness E on the face 14 side between the bottom part 20 and the sole 21 of the head body 6, the position of the center of gravity G of each head body 13 is set back W.
, the sweet area can be expanded by increasing the depth F of the center of gravity.

In addition, the recess 16 is cut using a cutting tool such as a cutting tool, so that the front end of the bottom portion 20 is cut closer to the sole 21.
It can be brought closer to the side and the depth of the center of gravity of the layer J-
can be done.

It should be noted that the present invention (not limited to the above embodiments)
For example, other than iron clubs. It can also be used for Tsuching wedge, Lead wedge, etc. Further, although the embodiment shown in +flJ shows the case where it is integrally formed from steel, various modifications are possible, such as forming it from other metals.

[Effects of the Invention] The present invention provides a head in which a recess for balance adjustment is formed in the eroded surface of the head body connecting the shafts 1r71 to 1, and the thickness between the bottom of the recess on the rear side and the sole is By forming the thickness between the bottom of the side recess and the sole to be more conspicuous, the center of gravity of the head body can be set back and the depth of the center of gravity can be increased, thereby providing a golf club head with an expanded sweet area. can.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an iron club, FIG. 2 is a perspective view of the iron club, and FIG. 3 is a sectional view of a conventional example. 11...Shaft 13...Head body 14...Face 15...Rear surface 16...Recess 20...Bottom 21...Sole D, E...Thickness 3rd on attorney's patent application figure

Claims (1)

[Claims] In a head in which a recess for balance adjustment is formed on the rear surface of a head main body to which a shaft is connected, the thickness between the bottom of the recess on the rear side and the sole is formed to be larger than the thickness between the bottom and the sole on the face side. A golf club head characterized by: