JP2006334343A - Putter for golf - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that whether putting is actually swung by following theory or not depends on the sensitivity of a player though pendulum putting where a putter is integrated with arms is suitable as an easy method to obtain head speed when a ball is rolled on a green. <P>SOLUTION: A transparent pipe is provided inside a head in a direction being the same as that of a swing in order to check whether a putting motion is the movement of the head based on the pendulum theory or not. A steel ball to be freely rolled is arranged in the pipe. Down swinging is performed so as to allow the steel ball to come close to the center of the pipe. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

        Among various golf putting methods, there is a pendulum type that swings with arms and putters together. The good point of the pendulum type is that the amount of rolling of the ball can be controlled by the amount of takeback. However, it was important that the actual swing was the original pendulum, and the check function was desired by the putter. The present invention provides an effective means that can always check a swing in practice.

Means for accurately measuring the distance from the ball to the cup on the golf green and the putting method based on the pendulum theory corresponding to the number of distances are already disclosed in the following patents and utility models.
Actual application 2003-003936 Putter with distance measurement function Actual application 2003-272773 Putter with distance measurement function Japanese Patent Application No. 2005-504504 Putter with distance measurement function According to the putting method of the pendulum theory described in these real (patent) applications, the relationship between the ball rolling distance and the putting head speed is known. In order to obtain the optimum head speed for the number of distances to the measured cup, there is a take-back amount of the putter according to the player's height, and some practice is required to shake the putter from the take-back position as theoretically. I need it.

        The golf putting procedure is accurate with the first putt within 1m of the cup and the second putt. In either case, an appropriate putting force is required for the target distance, and this force is adjusted by the back swing amount of the pendulum. Therefore, the movement of the putter head according to the pendulum theory is important, and the check function is required only by the sensitivity of the player.

        The present invention solves the above-mentioned problem, and in order to check whether the putting operation is a movement of the head based on the pendulum theory, a transparent pipe is provided in the head in the same direction as the swing, and is freely rotated therein. There is a moving steel ball, and it swings down so that this steel ball comes near the center of the pipe.

        The present invention can also be used to practice wearing a pendulum swing, and can practice practicing anytime and anywhere according to the number of distances, so it can be confidently put on the actual green. For example, this is used together with the “putter with distance measurement function” described in Japanese Patent Application No. 2005-504504.

As shown in FIG. 1, the number of distances to the cup A is geometrically determined by the height L of the player and the body shapes K1 and K2. In other words, when the green inclination θ = 0, the putter 1 is suspended at the position of the ball B, and when the grip end D is aligned with the eye height E of the player while the arm held is extended, it crosses the line of sight. The distance X from the grip position P is obtained by the following equation.
X = (K 1 · K 2 · L ² / DP) −K ² · L
However, K1: Eye height / height K2: Arm length / height and the takeback amount according to the number of distances can be determined by the pendulum theory as follows.
Fig. 2 models the putting action as a pendulum R with arms and putters integrated, and part of the potential energy stored in the pendulum after take-back is lost to rolling resistance and potential energy in the process of rolling the ball after putting. .
When the equivalent weight M at the tip of the putter, the pendulum length R, and the takeback amount T are assumed, the potential energy stored in the putter is all changed to kinetic energy immediately before hitting the ball B.
MV ² / 2g = MR (1-cos β) β: Putter swing angle where sin β = T / R, V: putter speed, g: moment of contact with the gravitational acceleration ball from the law of conservation of momentum MV = (1- K) MV + mv + ε
Where m: ball weight, v: initial ball speed, K: putter / ball momentum transfer rate
ε: momentum due to energy loss due to non-linear distortion of the ball, etc. mv≈KMV (ε≈0 is neglected because it is quantitatively small)

Assuming that the ball B that obtained the initial velocity v rolled by X at the green inclination angle θ,
mv ² / 2g = mμX + mXsinθ where μ: Green turf rolling resistance coefficient From these equations, the relationship between the ball rolling amount X and the putter takeback amount T is T = Rsinβ V ² = 2gR (1-cosβ)
Where β = cos ⁻¹ (1- (m / KM) ² · (X / R) · (μ + sin θ))
The relationship between the pendulum swing angle β (°), takeback amount T (cm) and butter head speed V (cm / s) required for the ball rolling amount X (cm) when the green inclination angle θ = 0 °. Table 1 shows the height of 170 cm as an example.

        Embodiments of the present invention will be specifically described with reference to the drawings. FIG. 3 shows an overview of a head 2 in which the present invention is mounted on a putter 1 with a distance measuring function. It is built in the head 2 in parallel with the swing direction so that the movement can be seen. When the putter head is swung down after swinging up to a predetermined takeback position, the finite-length track 4 forms a continuous track 5 of the pendulum, and the freely rolling steel ball 3 moves in the same manner as the weight of the pendulum. However, since the actual trajectory is finite, the downswing causes the putter head to follow so that the steel ball 3 comes to approximately the center of the finite length. If this transparent pipe has a curvature equivalent to the pendulum radius, the operability of following the head is further improved.

      Measuring the distance to the cup       Relationship between takeback amount and ball rolling amount in pendulum model       FIG. 2 is a schematic view of a golf putter according to the present invention and a cross-sectional view of a head. The swing of the putter creates a virtual continuous trajectory, and the steel ball freely rolls there.

Explanation of symbols

1. 1. Putter with distance measurement function 2. Putter head Steel balls 4. Orbit 5. Virtual continuous trajectory

Claims (2)

  A golf putter characterized in that a moving body that freely rolls in the same direction of the putter swing and a finite-length track with little rolling resistance are in the putter head, and the track is covered with a transparent material.   2. The golf putter according to claim 1, wherein the trajectory of the moving body that freely rolls has a curvature that is substantially the same as a radius of curvature that the head moves in a putter swing.

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