JPH10113408A - Golf club showing quantity of toe-down - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club showing the quantity of toe-down to enable a user to easily select and buy a golf club based on the quantity of toe-down matching to his/her head speed on buying a set of golf clubs or a single golf club. SOLUTION: An identification symbol P corresponding to the quantity of tow-down corresponding to a head speed of a golf club is shown on a part of a golf club shaft 1. M-40 or M-37 is to show the head speed Hs (m/sec) of a club head within an interval of about 10cm just before the golf club hits a ball. The quantity of toe-down (δ)m is to show, for instance, extremely small as SS, small as S, medium as M, large as L, and extremely large as LL.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club in which a golf club or an iron golf club is provided with an identification symbol corresponding to a toe-down amount corresponding to a head speed on a part of the golf club. The present invention relates to a golf club capable of easily selecting a golf club having a toe down amount corresponding to an optimum head speed for the user.

[0002]

2. Description of the Related Art Generally, when a golf club set is selected and purchased, or when a club set of a certain number is selected and purchased in a club set owned by the golf club set, for example, the golfer's own head speed (club head) is used. Just before hitting the ball, the speed of the club head for about 10 cm: the head speed of a typical male golfer is about 3
7 to 40 m / Sec).

That is, as a means for a general golfer to select a wood golf club, for example, a head speed as one factor for obtaining a maximum flight distance is used as a first criterion, and a head speed is maximized. The launch angle for obtaining the ideal trajectory and the number of revolutions of the ball are used as the following selection means. And the launch angle is determined by the head speed and the loft angle of the club head,
Approximately 10 to 16 degrees is the most efficient, and the number of revolutions of the ball launched at that launch angle is also 2,000 to 280.
0 rpm is the optimum rotation speed.

However, even if the above-mentioned head speed is unambiguously selected as a golf club selection factor, it is difficult to obtain the maximum flight distance and it is difficult to obtain an ideal trajectory. Research. That is, to obtain the maximum flight distance and ideal trajectory,
In addition to the head speed, it has been found that an element called a toe-down phenomenon corresponding to the head speed is important for selecting a golf club.

[0005] The toe-down phenomenon refers to the effect of the centrifugal force and gravity exerted on the club head when the golf club swings when the center of the face of the club head is aligned with the center of the teeed golf ball. The club shaft is bent, and the center of the face of the club head moves inward with respect to the center of the golf ball.
That is, the amount of movement (toe-down amount) when the club head is pulled toward the player when the golf club swings.

For example, as shown in FIG. 3, this toe-down phenomenon occurs when the center of gravity G of the club head 1 is generally away from the axis XX of the club shaft 2 by about 30 mm to 50 mm (in the case of a wood golf club head). Therefore, when the golf club swings, the club shaft 2 bends as shown by a dashed line in FIG. 3 due to the effect of the centrifugal force and gravity applied to the club head 1 and the club head 1 is moved to the player side (arrow method in the figure). Arising from the force of attraction.

As a result, the position of the center P (generally, a sweet spot) of the face surface 3 of the club head 1 with respect to the center of the golf ball Q actually teed up is a predetermined distance L (generally, from the address position to the player side). 5mm ~
(About 30 mm), and the toe side 3a of the face surface 3 of the club head 1 is hit with respect to the center of the tee-up golf ball Q.

[0008] For this reason, the direction in which the golf ball Q launches is not determined, and a phenomenon has occurred in which the player does not fly in the target direction aimed by the player or becomes unstable. Further, when the position of hitting the golf ball Q is deviated due to the toe-down phenomenon, the maximum resilience characteristic of the club head 1 cannot be obtained, and the probability of impairing the flight distance also increases.

For example, in order to actually evaluate a newly designed golf club according to the present invention, a golf club is mounted on an arm of a swing robot, and a golf ball Q is applied to the center P of the face surface 3 of the club head 1 at the time of addressing. When the golf ball Q was swinging with the positioning, the golf ball Q hardly flew straight. Therefore,
The present inventors have conducted various studies and experiments in order to solve the above-described phenomenon, and as a result, have found that one of the causes of the golf ball Q not flying straight is the above-described toe-down phenomenon. Obtained.

[0010] The present invention has been devised in view of such a conventional problem, and can be used to purchase a golf club set,
It is an object of the present invention to provide a golf club displaying a toe-down amount so that a golf club having a toe-down amount corresponding to one's own head speed can be easily selected and purchased when purchasing a single golf club. is there.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a golf club shaft or a part of a club head with an identification symbol such as a character, a symbol or a color corresponding to a toe-down amount corresponding to the head speed. The point is that the toe-down amount is displayed.

The toe-down amount corresponding to the head speed is displayed stepwise based on a conversion table of the head speed and the toe-down amount. The present invention is configured as described above, and by displaying an identification symbol corresponding to the toe down amount corresponding to the head speed on a part of the club head or shaft of the golf club, It can be used as a criterion for selecting a golf club of a purchaser of a single golf club, and as a result, a golf club with a maximum flight distance and an ideal trajectory can be played with a golf club adapted to oneself. You can do it.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 and 2 are partially enlarged front views of a shaft 10 showing an identification symbol P corresponding to a toe-down amount corresponding to the head speed of a golf club head on a part of a golf club shaft showing an embodiment of the present invention. And M-40 and M-37 of the identification symbol P
Is about 10c just before the club head hits the ball
m, the optimum head speed Hs (m / m
Sec).

The toe down amount (δ) mm is, for example,
The minimum is expressed as SS, the small as S, the medium as M, the large as L, and the maximum as LL. The table below shows the head speed Hs (m / m
7 shows a conversion table of the toe-down amount (δ) mm corresponding to (Sec)), which is used as a reference when a golf club is purchased. This conversion table is based on a golf robot (robot model name: My Shot Robot II (Miyamae Seisakusho)).
Wood golf club No. 1 (# 1: driver), head speed Hs (m / Sec), toe down amount (δ) mm corresponding to M-30 to M-46, extremely small (SS), small (S), Medium (M), large (L), and maximum (LL).

[0015]

It is to be noted that the above conversion table is produced for each club number so that, for example, the head speed (H
s) M-37 person measures the toe down amount (δact) at a golf shop or the like, and the toe down amount (δact) is
If it is 30 mm, by selecting a golf club of M-37, δact M displayed in advance on the shaft 1 of the golf club, a golf club set most suitable for oneself,
The golf club to be purchased as a single item can be easily selected.

For example, if a person who owns a golf club set of M-37, δact M desires to add another golf club set to another golf club set and holds the golf club set, the other golf club set will be used. If M-37, δact M is selected, it can be taken into the currently owned M-37, δact M club set without any discomfort. Specifically, the club can be used with the same feeling as a conventional club set without fine adjustment of the swing. Of course, even when a golf club set for personal use is constructed by exchanging the counts, the golf club set can be used without a sense of incongruity, and the golfer has more freedom in selecting a golf club.

As a result, the maximum flight distance and the ideal trajectory can be obtained with a golf club most suitable for oneself. In the above embodiment, the selection of the wood golf club has been described. However, it is also possible to select an iron golf club set or an iron golf club alone by the same method as described above.

[0019]

As described above, according to the present invention, a character, a symbol, a color, or the like corresponding to the toe-down amount corresponding to the head speed is displayed on the shaft of the golf club or a part of the club head. When purchasing a club set or a single golf club, you can easily select and purchase a golf club with a toe down amount corresponding to your own head speed, the maximum flight distance and ideal with the best golf club for yourself This has the effect of obtaining a target trajectory.

[Brief description of the drawings]

FIG. 1 is a partially enlarged front view of a part of a golf club shaft showing an embodiment of the present invention, in which an identification symbol corresponding to a toe-down amount corresponding to a head speed of a golf club head is displayed on a part of the shaft.

FIG. 2 is a partially enlarged front view of a part of a golf club shaft according to another embodiment of the present invention, in which an identification symbol corresponding to a toe-down amount corresponding to a head speed of a golf club head is displayed on a part of the shaft.

FIG. 3 is an explanatory diagram of a toe down amount in a general golf club.

[Explanation of symbols]

10 Golf Club Shaft S Identification Code

Claims (2)

[Claims] A golf club having a toe-down amount displayed on a shaft of a golf club or a part of a club head, wherein an identification symbol such as a character, a symbol, and a color corresponding to the toe-down amount corresponding to the head speed is displayed. club. 2. The golf club according to claim 1, wherein the toe-down amount corresponding to the head speed is displayed stepwise based on a conversion table of the head speed and the toe-down amount.