JPH01160573A - Golf ball - Google Patents

Abstract

PURPOSE: To enable to detect a generated magnetic flux by a magnetic detector to confirm the presence of a golf ball, by integrally forming a small alloy magnet core consisting of rare-earth and synthetic resin or rubber based resin and wrapping it with a cushioning material as the cover and providing a dimple pattern on the surface. CONSTITUTION: An outer cover 1 comprises a nonmagnetic material such as a polymer material or a gutta-percha rubber. A filler 2 is made of a resin and conforms to an elasticity characteristics. The filler 2 is integrally formed from a small-sized high quality magnet 4 centering therein and a resin or a rubber having large elasticity. The cylindrical magnet 4 is installed as a source for generating magnetic flux and having a small-sized and high quality magnetic characteristics by being constituted mutually in three axial directions, X, Y and Z, and for which rear-earth magnet is used. The magnet is magnetized after it is constituted and no fall of a magnetic force is occurred by adhering the magnetic each other, and the direction of both the magnet and the magnetization is accurately parallel. If more than 5m/m distance thickness is applied to a cushioning material, no sucking power is caused between a golf club. A differential flux gate magnetometer is suitable as a magnetism detector because magnetic noise is small in a golf course and the like, which enables the detection with an enough distance.

Description

[Detailed description of the invention] [Industrial application field] The present invention incorporates a magnet into the core of a golf goal.

This invention relates to a golf game in which the location of a golf goal can be confirmed by detecting the generated magnetic flux.

[Conventional method]

In the golf game, finding the location of the ball can only be confirmed with the naked eye. With the recent popularization of golf competitions, more and more beginners are playing on competition courses, and it takes a lot of time to check where the goal is, which extends the competition time.

Or troubles among golfers occur due to loss of golf goals, etc.

Furthermore, with the increase in the number of golfers, competitions have begun to be held at night, and the accompanying confirmation of the whereabouts of the golf course has become a major hindrance to the smooth operation of competition courses.

[Problem that the invention seeks to solve]

As mentioned above, locating a golf pole in a golf game requires the naked eyes of the player and the caddy.

One way to detect the whereabouts of a golf goal is to incorporate a magnet into a golf goal. There are very strict constraints on characteristics such as gender. Further, many iron clubs are mainly made of magnetic alloys such as iron. Therefore, during address operation,
The goal may move due to magnetic attraction.

Further, accidents such as two or more balls attracting each other on the green and sticking together may also occur. As described above, there are severe restrictions on golf soles in competitions.

[Means for solving problems]

In the present invention, an alloy magnet made of a rare earth element is integrally molded with a synthetic resin or a rubber-based resin in the core of a golf ball, and then magnetized, and the outer sheath is covered with a material such as polymer resin or rattling rubber. It consists of a structure with a dimple pattern on the surface.

and the alloy magnet is a bar magnet, and X.

By arranging them in the three directions of the Y and Z axes, it is possible to eliminate blind spots in the search, increase the search distance, and solve the above-mentioned problems.

[Effect]

The magnetic flux generated by the magnet inside the golf ball is detected by a magnetic detector, and its location is confirmed.

Margins below [Example] FIG. 1 is a sectional view of a commonly used golf goal. FIG. 2 shows a perspective view of a nuclear core according to the present invention.

In FIG. 1, the outer cover l is a dimpled polymeric resin material or rattling rubber.

In terms of magnetic properties, it is a non-magnetic material. Filler 2 is made of resin and meets repulsion characteristics 1.

The present invention has a structure in which a small high-performance magnet is integrated into the filler 2 with a resin or rubber having a large elasticity.

In Fig. 2, the bar-shaped magnets 4 incorporated as magnetic flux generation sources are arranged in three axes (x, y, and z directions), and are made of rare earth magnets, which are small and have good magnetic properties. are doing.

However, although ferrite magnets and alnico magnets can provide strong magnetism, they are slightly larger.

The weight of the entire sol is large, and the ballistic properties are sacrificed.

Also, it may be constructed with one magnet instead of three magnets, but since the two generated magnetic fields have dipole characteristics, a blind spot is created in the direction perpendicular to the magnet. Using three bar-shaped magnets can prevent the double center of gravity from being biased and strengthen the magnetic force, which is advantageous for the ball's ballistic properties and the detection distance of the goal. Each magnet is fixed by resin 5 and held accurately in the axial direction.

Then by magnetizing after the magnet is constructed.

It is important that the magnetic force is not reduced due to adhesion of the magnets, and that the direction of the magnets and the direction of magnetization are accurately parallel to each other.

Determining the amount of magnetization of a magnet is related to the sensitivity and detection distance of the magnetic detector. Generally, the magnetic moment of the magnet is M, the detection distance is t, and the strength of the magnetic field at a distant point is H.
Then, it is obtained by the linear equation.

Next, the condition for determining the amount of magnetization of the magnet is the shape and size of the magnet 2
Weight and suction power. Figures 4 and 5 show the results of measuring the suction force of an iron club or putter while changing the conditions of the ground on which the goal is rolled.

If the attraction force is reduced to prevent attraction to the club, the magnetic force will be weaker, and the detection distance will be shorter. this is,
This will also affect the sensitivity of the detector. On the other hand, there is a limit to the sensitivity of the detector, and it is necessary to allocate the detection level to the overall configuration.

In order to spread the magnetism over a long distance without causing adsorption with the iron club, a rare earth magnet is optimal because it is as small as possible and generates a strong magnetic field.

This is the distance between the surface of the golf ball and the magnet.

In other words, it was found that by providing a cushioning material such as resin or rubber with a thickness of 5 m or more, no attraction force with the golf club was generated. It is suitable for golf courses, etc., as there is little magnetic noise and the environment is good.

It can be detected at a sufficient distance.

〔Effect of the invention〕

As explained above, according to the present invention, small rod-shaped magnets such as rare earth magnets are arranged in the three axis directions of x, y, and z at the core of the golf ball, and after being fixed and held by the resin 5, By magnetizing, it is possible to make the direction of the magnet and the direction of magnetization accurately parallel, and handling during manufacturing is also facilitated.

When selecting the magnetizing force of the magnet, consider the weight of the luffal 2.
The location of the golf ball can be easily and quickly confirmed by considering the dimensions, the sensitivity of the magnetic detector, the adhesion of iron clubs and poles, and ensuring that the thickness of the cushioning material is at least 5m1m. Golf balls containing magnets can be provided.

[Brief explanation of the drawing]

FIG. 1 is an outline drawing of a commonly used golf goal. FIG. 2 is a perspective view of the core of a golf ball according to the present invention. FIGS. 3, 4, and 5 show the characteristics of a golf ball according to the present invention. l...Outer covering, 2...Filling material, 4...Bar-shaped magnet, 5
...Slide section 3 drawing distance N2

Claims (1)

[Claims] 1. A small alloy magnet made of a rare earth element is integrally molded into a spherical core with synthetic resin or rubber-based resin, the outer jacket is wrapped with a cushioning material such as a polymeric resin material or rattling rubber, and a dimple pattern is provided on the surface. A golf ball.