Toy top

Abstract

A novel toy top capable of changing the operation mode in the course of spinning without replacing a component member constituting the toy top and having a simple structure and a low cost is provided. A toy top to be spun on a playing board with a playing surface curved in a concave mirror shape includes a shaft portion adapted to contact the playing surface, wherein the shaft portion has a circumferential surface provided with a friction portion that exhibits a coefficient of friction larger than the shaft portion at the time of contacting the playing surface, and the shaft portion has a tip protruding lower than the friction portion.

Description

CROSS-REFERENCE TO RELATED APPLICATIONSThis application is based upon and claims the benefit of priority of the prior Japanese Patent Application No. 2010-124, filed on Jan. 12, 2010, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION1. Field of the InventionThe present invention relates to a toy top and, more particularly, to a toy top with an operation characteristic on a playing board changed at a point between the first half and the latter half of spinning of the toy top.2. Description of the Related ArtConventionally, a toy top capable of changing an operation mode by rearranging component members was proposed by the assignee of the present application (refer to, for example, Japanese Utility Model Registration No. 3149383) and has been in practical use. This toy top is configured by layering an upper layer member with a function of attacking an opponent toy top, a middle layer member that determines the height of the toy top, and a lo...

AI Technical Summary

Benefits of technology

The present invention has been made in view of the abovementioned problems. Accordingly, it is an object of the present invention to provide a novel toy top capable of changing the operation mode in the course of spinning thereof without replacing a component member constituting the toy top and having a simple structure and a low cost.

According to the present invention, when the friction portion contacts the playing surface at the time of high-speed rotation of the toy top, the friction portion firmly grips the playing surface to make the toy top move around on the playing surface at high speed. In low-speed rotation, the toy top moves to the center of the playing surface in a concave mirror shape to continue rotation with the shaft portion of a small coefficient of friction contacting the playing surface without moving. Therefore, a change in rotation speed changes the operation mode of the toy top without any operation by the user. Even though the toy top has a simple structure, the rotation speed automatically changes the operation mode of the toy top from a dynamic attack mode to a static endurance mode, thereby making it possible to attain a new interesting feature in a match between toy tops.

In one embodiment of the present invention, the friction portion is formed to have a cylindrical shape and fitted around the shaft portion, so that the friction portion can be easily fixed, thereby decreasing the number of components so as to simplify the manufacturing process and reduce cost.

Problems solved by technology

In the above latter conventional toy top, although the operation mode is automatically changed in the course of spinning of the toy top, the number of components is increased to make the structure complex, causing the problems that production cost increases and the production process is more difficult.

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