JPH02228980A - Iron club set - Google Patents

Abstract

PURPOSE:To reduce the rate of back spin with a lower number club, and to increase the rate of back spin with a higher number club, thereby to keep the run in a shorter distance by changing the shapes, etc., of punch marks for each number of clubs so as to adjust the friction with a ball. CONSTITUTION:The set is composed of a plurality of clubs, and each club is formed punch marks 12 on the face surface 11. As the number of club increases, the shapes of punch marks 12 are changed from ellipse to perfect circle gradually. In order to increase the friction with a ball, the surface areas of punch marks 12 are enlarged gradually, the depth deepened gradually, the spaces between the punch marks 12 are narrowed gradually or two or more of these means are combined. Thus, a slow rate of back spin with a lower number of club and a high rate of back spin with a higher number of club in the set of iron clubs 10 can be obtained.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an iron club set for golf.

Prior Art and Problems of the Invention In an iron club set, a club with a small number has less backspin in order to obtain a longer flying distance. Rarely, a club with a higher number will have more backspin qJ to reduce the run. In the past, the degree of backspin depending on the number of the love was caused only by the size of the loft angle depending on the number of the number, and it could not be said to be fully satisfactory.

Conventionally, punch marks have been formed on the face of the A/F An club to increase friction with the ball and effectively impart backspin to the ball. Usually, only some of the larger clubs in an iron club set are provided with the same shape, and are not used to adjust the backspin lit.

Therefore, the present invention was devised for the purpose of realizing an iron club set in which the backspin of each club is actively adjusted.

Means for Solving the Problems The present invention consists of a plurality of clubs, each club has a punch mark formed on its face, and as the number of the club increases, (a) the shape of each punch mark becomes elliptical. (b) The surface area of each punch mark is sequentially increased, (c) the depth of each punch mark is sequentially increased, or (d) the interval between each punch mark is increased. This is an iron club set that increases friction with the ball by successively decreasing the size or by adopting a combination of two or more of these measures.

The closer the shape of the punch marks on the face of the club is to a perfect circle, the larger the surface area and depth, or the closer the distance between them
The friction increases and the total backspin increases. Therefore, 1. Due to the +1'4 configuration, less backspin can be obtained with a smaller number of rubs in an iron club set, and more backspin can be obtained with a larger number of rubs in an iron club set.

EXAMPLES Hereinafter, the present invention will be specifically described with reference to the drawings.

In this iron club 10, the face surface 11 has punch marks 12. ... is formed.

The shape of each punch mark is a perfect ellipse, and the long axis of the ellipse is oriented in the horizontal direction. In the figure, A represents the long axis length of this ellipse, B represents the short axis length, S represents the surface area of each punch mark, D represents the depth, and L represents the interval between punch marks.

As a first example, an iron club set is shown in which only the shape, that is, the ratio A/B of the major axis length and minor axis length of the ellipse is changed. That is, the ratio A/B is set as shown in the following table. In addition, it is advantageous to orient the oval long sleeves horizontally because the friction in the lateral direction is smaller than that in the vertical direction, making it less likely that the ball will rotate laterally and bend its flight direction. .

Table 1 Ratio A/B 2.75 2.5 2.25 1.75 1.5 1.25 1 (Perfect circle) Club No. 3 Iron No. 4 Horn No. 5 〃 No. 6 〃 No. 7 〃 No. 8 Horn 9 As a second embodiment, an iron club set in which only the surface area S is changed is shown. That is, the surface area S is set as shown in the following table.

Table 2 Club No. 3 Iron No. 4 Horn No. 5 〃 No. 6 〃 No. 7 Horn No. 8 Horn No. 9 〃 70 Tsuinch 1 Wedge' Sand wedge゛Surface area S 2.0mm2 2.1mm"2.2mm" 2.3mm "2.4mm" 2.5mm2 2.6mm2 2.7mm"2°8mm" As a third example, an iron club set in which only the depth D is changed is shown. That is, the depth D is set as shown in the following table.

Table 3 Table 4 Club No. 3 Iron No. 4 〃 No. 5 〃 No. 6 Horn No. 7 〃 No. 8 〃 No. 9 Horn 0 Tsuchinku'Wedge' Depth D O, 2mm 0.3mm 0.4mm 0.5mm 0. 6mm 0.7mm 0.8mm 0.9mm No. 3 iron 5.9mm No. 4 // 5.7mm No. 5 // 5.5mm No. 6 // 5.3mm No. 7 /7 5.1mm No. 8 Noah 4. 9mm No.9
// 4.7mm Seventy Cinch 3 Wedge 2 4. 5mm Sunbiweshi 4. As a 3mm fourth example, an iron club set in which only the distance 'f4AL is changed is shown. In other words, set the intervals as shown in the table below.

Furthermore, the present invention can also be configured by appropriately combining the above-mentioned changes.

Effects of the Invention As mentioned above, the iron club set of the present invention changes the shape of the punch mark etc. for each club club to adjust the friction with the ball, so the amount of backspin given to the ball can be adjusted. , will vary greatly depending on the club size. Therefore, a club with a small number will have less backspin and a greater flight distance, and a club with a larger number will have more backspin and less run.

[Brief explanation of the drawing]

The drawings show a club embodying the present invention; FIG. 1 is a perspective view of the head portion of the club, and FIG. 2 is a partially cutaway enlarged perspective view of the main part. 10... Iron club, 11... Face surface, 1
2,...Punch mark, A...Long axis length, B
...Short axis length, S...Surface area, D...Depth, L...
·interval. Figure 2

Claims (1)

[Claims] 1. Consisting of a plurality of clubs, punch marks are formed on the face of each club, and as the number of the club increases, (a) the shape of each punch mark changes from an ellipse to a perfect circle. (b) sequentially increasing the surface area of each punch mark, (c) sequentially increasing the depth of each punch mark, or (d) sequentially decreasing the interval between each punch mark, Or an iron club set that uses a combination of two or more of these methods to increase friction with the ball.