JPS6168069A - Ball hitting device - 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 [Field of Industrial Application] The present invention relates to ball hitting tools such as golf clubs, tennis rackets, and bats.

[Conventional technology]

In various ball games, in order to extend the flight distance or increase the power of a batted ball, it is necessary to make an accurate impact and at the same time increase the speed and force of the batting tool against the ball at the time of impact.

However, in the swing motion of a ball hitting tool, there are technical and physical limits to increasing the speed and impact force, and increasing flight distance is not easy.

By the way, the present inventor previously proposed the following in Japanese Patent Application No. 59-44585 and Japanese Patent Application No. 59-127142. In other words, a tube is installed inside the shaft of the ball-hitting tool in an axial direction, a fluid object is enclosed within this tube so that it can move freely, and the fluid object is moved within the tube at high speed by the centrifugal force caused by the swing motion. We have proposed a ball-striking tool that can further accelerate the swing motion using the energy generated by the flowing object and effectively apply the speed and force to the ball at impact.

However, with the above-mentioned ball hitting tool, the swing motion and the timing of the start of the movement of the fluid object that occurs with the swing are extremely important, but depending on the swing method, the timing of the start of the movement of the fluid object and the start of the swing may be extremely important. The timing may be off. In particular, clubs and bats have a weakness that makes them susceptible to this. That is, the movement of the fluid object begins at the initial stage of the swing motion.

[Problem that the invention seeks to solve]

When the movement of the fluid object starts at the early stage of the swing, its movement is weak, and the movement of the fluid object has already ended before the swing movement reaches a high speed, so the movement of the movement is reduced to the high speed swing in the middle of the swing. There is a problem in that the movement cannot be continued continuously, and the energy produced by the movement cannot be fully utilized for the swing movement.

This invention was made to solve the above-mentioned problems, and it controls and delays the start of movement of a fluid object, and when the swing motion reaches a certain high speed, the fluid object is moved at high speed all at once, and the impact is reduced. The purpose of the present invention is to provide a ball hitting tool that can most effectively apply speed and force to the ball.

[Means for solving problems]

In order to solve the above problems, the present invention incorporates a tube in the axial direction inside the shaft of a ball-hitting tool, movably seals a magnetic fluid object within this tube, and It has a permanent magnet attached to the outside.

[For production]

When the ball hitting tool is placed in the take-back position, the flowing object is held in place by the magnet in the area where the permanent magnet is located.

During the swing of a ball-hitting tool, the flowing object does not start moving at the initial velocity stage due to magnetic attraction, but when the swing motion reaches a certain high speed, the centrifugal force acting on the flowing object changes in advance. When the attraction force of the permanent magnet is exceeded, the flowing object escapes the restraint of the permanent magnet and moves at high speed inside the tube in the direction of the head.The energy of this movement is transferred to the swing motion and is most effectively applied at the time of impact. It is.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Figures 1 to 4 illustrate a golf club as a ball hitting tool.
are doing.

A tube 3 is incorporated into the shaft 2 of the golf club 1 along the axis, and this tube 3 reaches the tip of the grip part 4 from the position of the center of gravity X of the golf club 1.

In the case of the above-mentioned tube 3 shown in the figure, two tubes (3a) and (3b), a part near the head and a part near the grip, are arranged in series,
Each part is supported within the shaft 2 by a lightweight filler 5 such as foamed synthetic resin, and is a single tube (3a).

The end portion of (3b) is supported by a support 6.

A magnetic fluid object 7 is movably sealed inside each of the tubes (3a) and (3b), and a permanent magnet 8.8 is attached to the outer periphery of the grip rose end of each tube (3a) and (3b). is located.

By the way, the tubes (3a) and (3b) are Teflon (trade name) tubes with an inner diameter of 3 mm and a wall thickness of 0.36 mm, and the magnetic fluid object 7 has a diameter of 2.38 rt.
m steel balls are used.

Also, the tube (3a) closer to the head side has a length of 32c.
m, with 4 of the above steel balls inside (total weight 0.229)
The grip tube (3b) has a length of 14 an, and contains 14 steel balls (total weight 0.7
It is enclosed in 7F.

The permanent magnets 8, 8 are thin square plate-shaped 0.4"X3.PX
Using magnets with a size of 3.6'', four of these magnetic plates each having a magnetic force of 16 Gauss are attached to the outer ends of each tube (3a) and (3b) near the grip.

Note that the golf club is not limited to the wood shown in the figure, but may also be an iron.

FIG. 5 shows a bat 11 as a ball hitting tool, in which a tube 3 is installed from the tip of the grip part 12 to the position of the center of gravity X, a magnetic fluid substance is sealed in the tube, and the end of the tube 3 near the grip A permanent magnet 8 is arranged on the outer periphery.

The tube 3 is a Teflon (trade name) tube with an inner diameter of 5, a wall thickness of 0.5 mm, and a length of 16 G. Seven steel balls with a diameter of 4111111 are used as magnetic fluid objects (total weight 1.9
9) Enclose. The magnets are four 16 Gauss magnetic plates.

In each example, the magnetic fluid object 7 is.

The material is not limited to steel balls; for example, a magnetic fluid in which fine magnetic metal powder is dispersed in a liquid as an emulsion may be used.

The ball hitting tool of the present invention has the above structure.

The effect will be explained based on the case of a golf club with reference to FIG.

When you grip the golf club 1 and take a top-op swing position from a take-back position, the head 9 is at a higher position than the grip portion 4, and the magnetic fluid object 7 is positioned at the end closer to the grip portion, as shown in position A in FIG. and is absorbed by the permanent magnet 8 at the point of ratio.

When the magnetic fluid object 7 is located at the end closer to the grip, as in position A, its center of gravity approaches the arm, making the club 1 feel lighter during the top-off swing and making the start of the subsequent downswing lighter.

During the downswing, the club 1 moves through the stages of start, initial velocity, full-speed swing, impact, and follow-through, but in the initial velocity stage from position A to the full-speed start line at position B in Figure 4, The attraction force of the permanent magnet 8 acting on the magnetic fluid object 7 is greater than the centrifugal force, and the magnetic fluid object 7 remains attracted to the grip side.

However, when the swing speed increases after passing position B of the full-speed start line, the centrifugal force acting on the magnetic fluid object 7 also increases, and this centrifugal force overcomes the attraction force of the permanent magnet 8, so that the magnetic fluid object 7 are tubes (3a), (3b)
The club 1 moves quickly toward the head side at high speed, and the energy produced by this high-speed movement further amplifies the swing motion of the club 1 itself.

This increases the speed and force of the head 9 at impact,
This will increase the flight distance of the ball.

[Effects] As described above, according to the present invention, a tube is installed inside the shaft, a magnetic fluid object is movably enclosed in the tube, and a permanent magnet that absorbs the magnetic fluid object is attached to the outer end of the tube. Because the magnet is placed, when swinging the ball-hitting tool, the magnetic fluid object can be attracted to the grip side during the initial velocity swing, and the magnetic fluid object can be moved all at once toward the head side at the same time as the full speed swing. By applying the moving energy of an object in a well-timed manner at the time of impact, it is possible to increase the force and speed at the time of impact, dramatically extending the flight distance of the ball.

[Brief explanation of drawings]

Fig. 1 is a front view of a golf club shown as [FIJ] of the ball hitting tool according to the present invention, Fig. 2 is an enlarged sectional view of the main parts of the same, and Fig. 3 is an enlarged sectional view taken along arrows ■-■ in Fig. 2. Figure, 4th
The figure is an explanatory diagram showing the swing motion same as above, and FIG. 5 is a front view showing a row of bats as a ball-hitting tool. ↑ is a golf club, 2 is a shaft, 3 is a tube, 4.
12 is a grip, 7 is a magnetic fluid object, 8 is a permanent magnet, 1
1 is a bat

Claims (5)

[Claims] (1) A ball hitting tool in which a tube is installed along the axial direction inside the shaft of the ball hitting tool, a magnetic fluid object is movably enclosed within the tube, and a permanent magnet is attached to the outside of one end of the tube. (2) The ball hitting tool according to claim 1, wherein the tube is incorporated over a range from a position near the grip of the shaft of the ball hitting tool to the center of gravity of the ball hitting tool. (3) The ball hitting tool according to claim 1, wherein the magnetic fluid object is a group of magnetic metal spheres. (4) The ball hitting tool according to claim 1, wherein the magnetic fluid object is a magnetic fluid in which fine magnetic metal powder is dispersed in a liquid as an emulsion. (5) The tube is supported at several places with lightweight filling and is arranged coaxially with the shaft.
The ball hitting equipment described in section.