JPS62284671A - Ball hitting hammer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention This invention relates to a mallet used to hit a ball used in games such as gateball and croquet.The purpose of the invention is to not only convert hitting energy into forward energy, but also to
This was done to convert the rolling energy into energy, thereby improving the straightness of the ball.

Furthermore, it has been mechanically proven that a ball with a strong rolling force has excellent directivity. Omitted.

Structure Figure 1 shows the basic structure.A conventional mallet has striking surfaces perpendicular to the main body on both sides, as shown in the right half of the figure, whereas the product of the present invention has striking surfaces on both sides, as shown in the left half. It is characterized by the fact that the face is not perpendicular to the main body, but has a shape in which the upper side is forward when in use, and usually only one side is used, but players who play in a special way may have forward angles on both sides. .

Figure 2 is shown to compare and explain the distribution of force during theoretical hitting with conventional products. In both figures, ■ indicates a ball. ■ is the center of gravity of the ball. ■ is the striking side of the mallet. ■ is the impact point of the ball. The arrow indicates the direction of force.

Diagram A shows the distribution of force when hitting horizontally from right to left with a mallet whose hitting surface is perpendicular to the main body. The ball continues to move to the left and is not converted into cartwheel force. In reality, what is rolling is a forward force that is secondarily converted into a rolling force due to the resistance that hits the ground or an obstacle, and the obstacle is likely to cause a change in direction.

Even if you hit the ball under the same conditions, in diagram B, the point of impact ■ is higher than the center of gravity ■, so part of the hitting force will change to the turning force, and the other important thing is the repulsive force of the hit.

It acts in a downward direction twice the forward inclination angle and is therefore strongly pressed against the land, increasing the downward frictional force and converting it into a rotational force that moves only the upper part forward.

Regarding implementation, the drawback of the forward-inclined mallet is that errors in the circumferential direction of the mallet result in slope-like errors in the striking surface.

In order to eliminate this drawback, this product has devised a means to visually check the accuracy. For example, in Figure 3 (trigonometry illustration of a practical product), the parts marked with ■ and ■ are colored white, and the part marked with ■ is colored white. If you color it black and look at it correctly from above, you won't be able to see the part marked ■, but you will see a white line inside the black part.When Freyer tries to hit the target with a ball, he usually places himself directly above the extension line between the target and the white ball. Aim with the eyes in the correct position, so if the main body of the mallet looks like an upward angle, the forward tilt angle is correct, and if the white part on the back side is visible, the striking posture is incorrect, so correct it.

Regarding the effectiveness of Meisai, the most important thing when hitting a ball is that the target, your ball, and the mallet are correctly aligned in a straight line, and the hitting motion is also on that line. If the ball goes out of order, the ball will not advance accurately.

Among these four requirements, there is a surprising amount of uncertainty regarding the direction of the mallet, especially when the color of the clan and the color of the mallet are similar.

In order to eliminate this drawback, it is useful to add brightly colored streaks to the gutter body to help detect errors in the direction of the hammer and the direction of the blow. (2) was drawn for that purpose, and the fact that I specified it specifically in the claims when filing the application was based on my own experience, and its utility is great regardless of whether there is an anterior tilt angle or not.

Although the colors used in the explanation are white and black, this is just an example, and any color may be used as long as it is clear and easy to distinguish.

[Brief explanation of drawings]

Figure 1 Basic diagram Figure 2 Explanatory diagram of force distribution Figure 3 Practical things 1-Example diagram ¥711 people 2nd trouble A Ya 31 brother B “A”

Claims (1)

[Claims] Part 1: As shown in Figure 1, the hitting surface of the mallet has an angle where the upper side is tilted forward and the lower side is tilted backward (hereinafter referred to as the forward tilt angle), which allows the ball to be hit horizontally. As a result, a forward force is applied above the center of gravity of the ball, and the component force from the strike works downward and strongly presses the ball downward, creating strong frictional resistance on the ground surface and a portion of the striking force converts into rolling force. To be done. Part 2: Apply a bright color (paint) on the outside of the mallet that matches the direction of the striking motion, and use this as a guide to check the accuracy of the forward tilt angle or to confirm the direction of the mallet (coincidence with the striking motion). A ball-hitting mallet characterized by having both or one of the above two things.