JPH0490771A - Portable device for golf ball center plane marking using gyroscope - Google Patents

Abstract

PURPOSE: To facilitate marking of the center plane of an ordinary golf ball and use it by an average golfer, by including a housing, a battery-driven electric motor, and a starting switch. CONSTITUTION: An arch cover 23 of a housing 2 is removed, a golf ball 5 is mounted on a rotor disc 4, the arch cover 23 is returned on a stability disc 22, and the golf ball 5 is so fixed as to be rotated in a space between the tip part of the arch cover 23 and the rotor disc 4. Secondly, an activation switch 3 is pushed on so as to drive a battery-driven electric motor 1 and drive the rotor disc 4. As the golf ball is rotated, it becomes a moving state, while being stable. At this time, marking on the center plane of the golf ball is performed using a pencil or a similar marking tool. After marking on the center plane, the activation switch is pushed on again so as to stop the battery-driven electric motor 1 and consequently stop the rotor disc 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates generally to centrifugal force devices, and more particularly to a center brain marking device that uses centrifugal force to mark golf balls.

“Description of Prior Art” Currently on the market, as shown in FIGS. 3A to 3C,
There are at least three different types of golf balls on the market. If the hardness of these three types of golf balls were completely uniform and their cores were perfectly centered, then the center of gravity of all golf balls would be exactly at their center.

However, in reality, the hardness of golf balls is not completely uniform. Furthermore, in golf balls having more than one layer of cores, the core or cores are often slightly off-center, such that the center of gravity of such golf balls is centered as illustrated in FIG. It's not necessarily at the center.

As illustrated in FIGS. 4 and 5, the center of gravity of each core is at B, and the center of gravity of its outer shell is at A. If the center of gravity of a golf ball happens to be not exactly at the center of the golf ball, even if the golfer were to hit the golf ball completely with the center of the wing, the golf ball would not be exactly what the golfer thought it would be. It does not fly in any direction.

[Purpose of the invention]

A primary object of the present invention is to provide a gyroscope-based golf ball center plane marking device that can be used by the average Colfer to mark the center plane of a conventional golf ball.

Another object of the present invention is to provide a golf ball center plane marking device that uses such a portable gyroscope.

Another object of the present invention is to provide a golf ball center plane marking device using such a gyroscope that is durable and inexpensive.

Other objects of the invention will be apparent from the following description, and the novel features characterizing the invention are pointed out with particularity in the claims annexed and forming a part hereof. These and other objects will be apparent to those skilled in the art from the following detailed description, with appropriate reference to the accompanying drawings, unless otherwise indicated.

DESCRIPTION OF THE EMBODIMENTS Referring to FIGS. 1 and 2, and more particularly to FIG. 1 and an activation switch 3.

The housing 2 includes a substantially cylindrical cylindrical portion 21, a stabilizing disk 22 fixed to the upper end of the cylindrical portion 21, and an arcuate cover 23 friction-fitted to the upper end of the stabilizing disk 22.
It is equipped with. The arched cover 23 intersects 2
It consists of two semicircular bands or pieces, one of which is provided with a substantially semicircular marking slot 231 therein. A battery compartment 2] 1 is provided at the lower end of the cylindrical portion 21, in which a dry cell battery for supplying power to the battery-powered electric motor 1 is received.

From the upper end of the battery-powered electric motor 1 is a drive shaft 11.
is protruded, and the drive shaft is fixed to the center of the cylindrical part 21 at the top of the battery compartment 211. A rotor disc 4 is connected to the drive shaft 1 such that it is rotated by the drive shaft 11 when the battery-powered electric motor l is activated.
Fixed to 1. The lower end of the rotor disc 4 is rotatably fixed by the stabilizing disc 22 to prevent vibration.

An activation switch 3 is fixed to the upper end of the cylindrical portion. The activation switch 3 is electrically connected to the battery-powered electric motor 1 so that when pressed by the user, the battery-powered electric motor 1 is activated or deactivated.

The operation of a portable golf ball center plane marking device using a gyroscope will now be described.

First, the arched cover 23 of the housing 2 is removed, then the golf ball 5 is placed on the rotor disc 4, and then the arched cover 23 is returned onto the stabilizing disc 22, and the upper part of the arched cover 23 and the rotor disc are The golf ball is fixed in a rotatable state between 4 and 4. The activation switch 3 is then pressed to drive the battery-powered electric motor 1 and drive the rotor disc 4. As the golf ball rotates, it eventually becomes stable but in motion. At this point, use a pencil or similar marking device to mark the center brain of the golf ball. After marking the center brain, the activation switch is pressed again to stop the battery-powered electric motor 1 and thus the rotor disc 4. When the golf ball 5 stops turning, the arched cover 23 is removed and the golf ball 5 is taken out.

For the user's convenience, the housing 2 is provided with a pencil holder 24 in its cylindrical portion 2, which is longitudinally aligned with the outer surface of said cylindrical portion 21.

Although the invention has been described with reference to specific examples, it will be understood that many modifications may be made thereto. for example,
The arcuate cover 23 may have a hemispherical shape rather than as two arcuate sections as shown in FIG. It is therefore to be understood that the invention as described herein is intended to include all such modifications as should fall within the scope of the appended claims.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of a golf ball center plane marking device using the gyroscope of the present invention. FIG. 2 is a perspective view of a golf ball center plane marking device using the gyroscope of the present invention of FIG. FIG. 3A is a cross-sectional view of a single-core golf ball. FIG. 3B is a cross-sectional view of a double-core golf ball. FIG. 3C is a cross-sectional view of a triple core golf ball. FIG. 4 is a cross-sectional view of a double-core golf ball in which the two cores have different centers of gravity. FIG. 5 is a schematic diagram showing two different positions of the center of gravity of the first and second cores in the golf ball of FIG. 4 with respect to the circumference. FIG. 6 is a schematic diagram showing the state of a golf ball having a center of gravity at an eccentric position at the time of contact with a golf club. The names of the main parts in the figure are as follows. 1: Battery-powered electric motor 2: Housing 3: Starting switch 4: Rotor disc 5: Golf ball 21: Cylindrical part 22: Stabilizing disc 23: Arch-shaped cover 24: Pencil holder 231: Marking slot 211: Battery Painting Room Diagram Diagram Diagram

Claims (1)

[Claims] 1. A portable golf ball center plane marking device using a gyroscope, which includes a cylindrical portion 21
and a stabilizing disk 22 fixed to the upper end of the cylindrical portion 21.
and an arcuate cover 23 that is friction-fitted to the upper end of the stabilizing disk 22, said cylindrical portion 21 having a battery compartment 211 at its lower end for receiving a battery, said arcuate cover 23 said housing 2 having a substantially semicircular marking slot 231; and a battery-powered electric motor 1 with a drive shaft 11 protruding from its upper end.
is fixed at the axial center of the cylindrical part 21 with the rotor disk 4 fixed to the drive shaft 11, so that when the rotor disk 4 activates the battery-powered electric motor 1, the rotor disk 4 is driven by the drive shaft 11. The lower end of the rotor disc 4 is connected to the battery-powered electric motor 1, which is rotatably fixed by the stabilizing disc 22 so as not to vibrate, and the cylindrical part 21.
An activation switch 3 fixed to the upper part of the battery-powered electric motor 1 is configured such that when the user presses the activation switch 3, the battery-powered electric motor 1 is activated or deactivated. A portable golf ball center plane marking device using the gyroscope including the activation switch 3 connected thereto. 2. The portable golf ball center plane marking device using a gyroscope as claimed in claim 1, wherein the cylindrical portion 21 is fitted with a pencil holder 24 vertically aligned with the outer surface thereof.