JPH03182290A - Magic ball - Google Patents

Abstract

PURPOSE:To obtain a ball rolling up on an inclined surface and rolling zigzag on a plane surface by providing a hollow spherical body, a weight eccentrically disposed in the spherical body and having wheels in contact with the spherical body inner surface, a means for rotating the wheels, and a means for moving the weight by the rotation. CONSTITUTION:A moving body 1 is formed of wheels 3, a strut 4, a wheel mounted on the strut, a motor 6, a weight 7, a radio control receiver 8, an antenna 9, and others. The strut 4 is axially extended and contracted, and the wheel 6 mounted on the strut is pressed onto the spherical body inner surface by a spring 10. The motor 6 is rotated by the signal from the radio control receiver 8, this rotation is transmitted to the wheels 3 in contact with a spherical body 1 by a gear 11, and the wheels 3 are rotated and rolled on the spherical body inner surface to move the gravity of center of the moving body 2 frontward, so that the hollow spherical body 1 is rotated and moved frontward. A pattern is drawn with vivid colors on the surface of the spherical body 1 to keep the inner part from sight, and the advancing direction of the moving body 2 in the spherical body can be changed by changing the rotating speed of the two wheels by the operation of the radio control receiver 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] This invention relates to a ball-shaped toy that climbs a slope, moves forward while rotating horizontally, and rolls in a zigzag pattern.

[Prior Art] There has never been a ball that rolls up an inclined surface or rolls in a zigzag pattern on a flat surface while rotating horizontally.

[Problem to be solved by the invention] People are very interested in objects that exhibit behavior that deviates from common sense or experience, but a ball rolling on a flat surface has an initial rotational force, an initial velocity, and friction. It was just an object with a predicted motion determined by forces.

[Means for Solving the Problems] In order to satisfy the above-mentioned interest, a moving body having a wheel that rotates by receiving power in contact with the inner wall of the sphere and having a center of gravity as low as possible is housed in a hollow sphere. This movable body is supported by struts to prevent radial movement or wobbling within the sphere. The contact point between the support and the inner wall of the sphere moves smoothly in contact with the inner wall. The two wheels are placed in parallel so that the sphere can rotate horizontally or move in a zigzag manner, and each can rotate independently. Batteries are used for power to move the mobile object. Since this moving body is sealed inside a hollow sphere, power is turned on and off using impact force, magnetic force, infrared rays, radio waves, etc. from outside the sphere.

[Operation] When power is applied to the movable body, when the outer sphere is fixed, the movable body rotates on the circumference along the inner wall of the sphere, and accordingly, its center of gravity also rotates on the circumference. At this time, when the sphere is placed on a flat surface, the force that tries to keep the center of gravity in the vertical direction as it rotates on its circumference moves, causing the sphere to rotate in the direction in which the center of gravity moves.

When the sphere is on a plane with an inclination, the point of contact between the sphere and the plane is uphill from the vertical line from the center of the sphere, but if the rotating center of gravity moves further up from the point of contact, the sphere will move uphill due to gravity. roll up. When a sphere rolls on the floor and stops against a wall, the center of gravity rotates in the direction of the wall within the sphere and eventually becomes higher than the center of the sphere, becoming unstable and rotating in either direction parallel to the wall. . In other words, when this sphere hits a flat wall, it rotates to the left or right, changes direction, and returns to its original direction. The above-mentioned mode is shown when the two wheels placed in parallel have the same rotational speed (revolutions per unit time, hereinafter the same) and their directions, but if the two wheels have the same rotational speed and the When the direction is reversed, the moving body rotates horizontally, and as a reaction, the sphere begins to rotate horizontally in its home position. In this case, the sphere will eventually stop due to the friction between the sphere and the floor, but if the rotation speed of the moving body is reduced, it will rotate in the opposite direction. Furthermore, if there is a difference in the rotational speed of the two wheels, the center of gravity moves by curving the inner wall of the sphere, so the sphere tends to roll on a flat surface in a curved trajectory. At this time, if the floor surface has a lot of friction such as a carpet, the sphere will roll in an arc, but on a smooth, hard surface, the sphere will move forward while rotating horizontally due to the force that tries to go straight against the centripetal force. When the rotation speed of the two wheels is alternately increased and decreased, the sphere rolls in a zigzag pattern on a soft floor. As the floor changes from carpet to tatami to hard flooring, this sphere rolls in a variety of ways, including large zigzags, small zigzags, and horizontal rotation.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of only the hollow sphere and the weight stored inside it, taken along a plane passing through the center of the sphere perpendicular to the viewpoint. In the figure, a moving body 2 is housed inside a sphere l. The moving body 2 includes wheels 3, a support 4, wheels 5 attached to the support, a motor 6, and weight. The strut 4 expands and contracts in the axial direction, and a wheel 5 attached to the strut is pressed against the inner wall of the sphere by a spring 10. The motor 6 rotates in response to a signal from the radio-controlled receiver 8, and this rotation is transmitted to the wheels 3 inscribed in the sphere 1 through the gear 11, and the wheels 3 rotate and roll on the inner surface of the sphere, moving the center of gravity of the moving body 2 forward. The hollow sphere 1 rotates forward in order to move it. The hollow sphere l is constructed by interlocking two plastic semicircular spheres. The wheels 3 are made of rubber and have a high coefficient of friction with the inner wall of the sphere. Weight 7 is made of lead. The gear 11 increases the rotational torque of the wheels 3 by using a gear with a large reduction ratio. The surface of the sphere l is patterned with bright colors so that the inside is not visible. By operating the radio-controlled receiver 8 and changing the rotational speed of the two wheels, the traveling direction of the moving body 2 within the sphere can be changed, and the traveling direction of the sphere 1 can be arbitrarily manipulated. Second
The figure is a side view of Figure 1, in which only the hollow sphere is cut along a plane perpendicular to the viewpoint and passing through the center of the sphere.

This embodiment uses a radio-controlled radio, but instead of manipulating the number of rotations of the wheels, the present invention can be easily implemented by attaching wheels of different diameters to the same shaft and changing the speed at which each wheel travels. You can also do that. In this case, the power is turned on,
Turning off is performed by impact force, magnetic force, infrared rays, etc. from outside the sphere. One way to use impact force to turn power on and off is to shake the sphere lightly and use the inertia of the weight to operate a microswitch. In addition, in the embodiment, when the wheel 5 attached to the column is rotated using the axis of the column 4 as the rotation axis, the structure is such that the center of the wheel 5 attached to the column is placed behind the line extending from the axis of the column. This is necessary for the followability of the wheels 5. The weight can be omitted by sharing the device with the device that realizes the means for rotating the wheels. Further, the present invention can be implemented even if the support column is omitted. It is conceivable to use three or four wheels, gears (registered trademark), or caterpillar-shaped wheels, and it is also conceivable to use a spring as the power source. Other possibilities include adding irregularities to the surface of the sphere or applying a gyro to the moving object to change the rotation of the sphere.

[Effects of inventions] As seen in magic and acrobatics, people are extremely interested in phenomena that cannot be easily imagined from common sense or experience.

A ball that looks like an ordinary ball rolls up a slope, travels on an uneven surface with its own blade, and rolls in a zigzag pattern on a flat surface while rotating horizontally.The ball is beautiful in color and can be used as a toy. It is also quite interesting to the viewer.

[Brief explanation of drawings]

FIG. 1 is a front view of the present invention, and FIG. 2 is a side view of the present invention. l...Hollow sphere, 2...Moving body, 3...Wheel, 4
... Strut, 5... Strut wheel, 6... Motor
7... Weight, 8... Radio control receiver, 9... Antenna, lO... Spring, 11... Gear, 12... Dry battery

Claims (1)

[Claims] Consisting of a hollow sphere, a weight provided with a wheel placed eccentrically within the sphere and in direct or indirect contact with the wall of the sphere, means for rotating the wheel, and means for moving the weight by the rotation. magic ball