JPH0357257Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a golf ball that can be hit in the direction in which the center of gravity of the ball coincides with the center of the ball by marking the surface of the ball. It is.

(Prior art and its problems) Generally, due to the structure and tolerances in the manufacturing process of golf balls, the center of gravity of the ball does not exactly match the center position of the ball (so-called centroid), resulting in a deviation between the two. Therefore, even if the impact is made on the appropriate position of the ball during the play, the flight direction (or rolling direction) of the ball may be shifted to the left or right (the direction in which the center of gravity is biased) due to the bias in the center of gravity. There was an inconvenience that it would shift. In order to solve this inconvenience, there is an application (Utility Model Application Publication No. 1465/1983) previously filed by the same applicant as the present invention.

This conventional technique is explained with reference to FIG. 8. A circumferential line is drawn on the ball surface 1a through the intersection points P1 and P2 of the diameter line d connecting the center position O of the ball 1 and the center of gravity G and the ball surface 1a. It is.

According to this, if the circumferential line is set (fixed) so that it faces the target direction in plan view, the center of gravity of the ball will be located within the vertical plane V that includes the direction in which the ball is struck by the club head W, so the deviation of the center of gravity will cause This prevents the ball 1 from shifting in the left-right direction to some extent, contributing to the straightness of the ball 1 when shooting.

However, this conventional technique has a drawback in that it cannot prevent the spin (rotation) of the ball 1 when it flies.

As shown in Fig. 8, even if the direction of impact F coincides with the vertical plane V of the circumferential line, the ball is naturally spherical, so when it makes an impact, the force F received from the head W is always at the center. By passing through O, if the center of gravity G deviates from the line of force F as shown in the figure, it will receive a large rotational impact force of the deviation length T from F to the center of gravity G x force F. It will start rotating around the center of gravity G in the direction of the arrow.

When the ball flies, it is necessary to avoid spin as much as possible. This is because if the ball lands on the grass while being spun, the ball will roll on the grass more than necessary, making it difficult for the ball to hit the target hole. Of course, this is common knowledge in golf, but the above-mentioned conventional technology has not been able to solve the problem of reducing the spin of the ball as much as possible when it flies.

(Means for Solving the Problems) The present invention has been made to solve the above-mentioned problems, and it is possible to match the direction of the diameter line passing through the center of gravity of the ball with the direction of hitting, and For this purpose, it is possible to easily set the balls, and the technical means is to set the balls 1,
The point where the diameter line D1 passing through the center of gravity G of 3, 5, 7, and 9 intersects with the ball surface 1a, 3a, 5a, 7a, 9a is the hit point H, and the diameter line D2 perpendicular to the diameter line D1 is the ball surface. The point of intersection is defined as a lead point L, and the lead point L is characterized in that marks 2, 4, 6, 8, and 10 are attached to the lead point L so that the direction of the hit point H can be identified.

(Example) Hereinafter, the present invention will be explained based on examples.

In FIG. 1, a ball 1 has an arcuate mark 2 on its surface 1a, which is generally arcuate and extends the same length from a lead point L in the direction of each hit point H, H. Hit points H, H and lead points L, L are determined as follows. That is, in FIG. 2, which shows the ball 1 shown in FIG. Lead points L, L are the points where an arbitrary diameter line D2 perpendicular to the line D1 intersects with the ball surface 1a.
That is to say.

To explain the above-mentioned action of the ball 1 during a driver shot, by setting the ball so that the arc mark 2 faces upward and in the direction of the target fly ball course, the hit point H is set. This will be the side that will be hit by the club head of the driver. Therefore, if you make a correct shot, the club head will accurately hit the center of the ball 1, which is on the diameter line passing through the center O and the center of gravity G of the ball 1, and make an impact. Since there is no deviation in the flight direction due to deviation of the center of gravity of the ball 1, it is possible to accurately fly the ball along the target flight course. In other words, when setting the ball 1, by setting it as described above using only the arc mark 2 as a guide,
A shot can be made in the direction in which the center O of the ball 1 and the center of gravity G coincide, and the ball 1 can be set very naturally and reliably.

In other words, since the lead point is marked with a mark that allows the direction of the hit point to be identified, even if the hit point H of ball 1 is not marked, the mark 2 on the lead point L is By setting the ball 1 so that the ball faces the target in plan view, the hitting surface inevitably hits the hit point H.

3 to 6 show other embodiments of the present invention.

The ball 3 in FIG. 3 has an arrow mark 4 on the lead point L indicating the direction of one hit point H.
. This arrow mark 4 may indicate any hit point H, but when manufacturing a large number of balls 3, one of the hit points H is specified for all balls 3 and the direction of the arrow mark 4 is indicated. It is convenient for the user to decide. The arrow mark 4 may be an arrow pointing in both directions, and each arrow may have a different shape or color. The shape of the arrow mark 4 can be any shape.
For example, a simple triangle mark, square mark, or circle mark may be used.

The ball 5 in FIG. 4 has a lead point L with a character mark 6 in which characters are arranged along the direction of the hit points H, H. The character mark 6 may be a character indicating that it is a lead point L, or may be a manufacturer's name or trademark.
The ball 7 shown in FIG. 5 has a multi-point mark 8 on the lead point L, which is made up of three dots arranged along the direction of the hit points H, H. Various shapes can be adopted for each dot mark of the multi-point mark 8, and the number thereof may be an appropriate number, and the shape and color of each dot mark may be changed. The ball 9 in Fig. 6 is,
A circumference mark 10 consisting of a circumference passing through all the lead points L on the ball surface 9a is attached.
This shows that the direction perpendicular to 0 is the hit point H.

The above-mentioned marks 2, 4, 6, 8, 10 may be attached to only one lead point L, or may be attached to both lead points L, L. In addition, the lead point L itself is marked with a simple dot,
A direction mark indicating the direction of the hit point H may be attached near the lead point H, and these marks may collectively indicate the position of the lead point L and the direction of the hit point H, or various other marks may be used.

According to the present invention, as shown in FIG. 7, since the center of gravity G and the center O are always aligned in the direction of the impact force F of the club head W, the impact force is entirely generated by the diameter connecting the center of gravity G and the center O. Since no rotational impact force acts on the ball and is centered around the center of gravity G, it has the effect that almost no spin (rotation) is applied when the ball flies.

(Effects of the invention) According to the invention, when shooting the ball, the direction of the diameter line passing through the center of gravity of the ball can be matched with the direction of impact by the club head, and the rotational force around the center of gravity of the ball can be made to match the direction of the diameter line passing through the center of gravity of the ball. Since there is no effect on the ball, if there are no other factors when the ball flies, there is almost no spin, no deviation in the direction of the ball, and less rolling when the ball touches the ground, which increases the probability of reaching the target. I can do it.

Furthermore, since the lead point has a mark that allows you to identify the direction of the hit point, you can easily and correctly set the ball by focusing only on the mark on the lead point. I can do that. In particular, the mark attached to the lead point is located at the top of the ball, making it easy for the player to see and setting the ball accurately and quickly. Because you only have to swing the ball, you don't have to look in the direction of the target, look at the ball, or shake your face multiple times, and you can hit with only the distance in mind, and you can expect even more accurate shots.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of the ball, FIG. 2 is a diagram illustrating the hit point and lead point, and FIGS. 3 to 6 are perspective views showing other embodiments of the ball. 7 are diagrams for explaining the operation of the present invention, and FIG. 8 is a diagram for explaining the operation of the conventional example. O...center, G...center of gravity, D1, D2...diameter line, H...hit point, L...lead point, 1, 3, 5, 7, 9...ball, 1a, 3
a, 5a, 7a, 9a...Ball surface, 2, 4,
6, 8, 10...mark.

Claims (1)

[Scope of utility model registration request] A point where a diameter line passing through the center of gravity of the ball intersects with the ball surface is defined as a hit point, a point where a diameter line perpendicular to the diameter line intersects with the ball surface is defined as a lead point, and the direction of the hit point can be identified at the lead point. A golf ball characterized by being marked with a possible mark.