Rotating Spin Top Device with Weighted Ball Cavity
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Solution Overview
Problem
Existing spin tops lack a spherical toy design with an interior cavity and weighted ball where the radius of the ball relative to the radius of the spherical toy is not optimized for creating a rotational force.
Innovation Solution
A spherical shell with a cylindrical cavity containing a steel ball, where the radius of the shell and ball are set parameters in a fixed relationship to create rotational movement, allowing the ball to move between the ends of the cavity as the shell spins, enhancing the rotational force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the radius of the ball is increased relative to the radius of the spherical shell, then the rotational force is improved, but the ball may become too large to fit within the cavity
Solution Approach 1:
The patent applies parameter changes by establishing specific mathematical relationships between the radius of the spherical shell (R), the radius of the ball (r), and the distance from the ball center to the cavity end (d). The parameters must satisfy: R > r + d, where d ≥ 0.5r, and the ratio R/r falls within specific ranges (1.5-3.0 for cylindrical cavities, 1.2-2.5 for spherical cavities). These parameter constraints optimize the rotational force while ensuring the ball fits within the cavity.
2Ease of operation
If the cavity size is increased to accommodate a larger ball, then the rotational movement is improved, but the overall shell size increases
Solution Approach 1:
The patent optimizes the cavity dimensions by defining the cavity length L and diameter D in relationship to the ball radius r and shell radius R. For cylindrical cavities: L ≥ 2r and D ≥ 2r. For spherical cavities: the cavity is defined by the distance d from the ball center to the cavity end. These parameter relationships ensure adequate space for rotational movement while minimizing overall shell size.
3Duration of action of moving object
If the ball weight is increased to enhance rotational force, then the spin duration is improved, but the device complexity increases
Solution Approach 1:
The patent addresses device complexity by specifying material composition and weight ratios rather than complex mechanical structures. The ball is made of dense material (steel, lead, or tungsten) with density ≥ 7.8 g/cm³, and its weight W satisfies: W ≥ 0.1 × M where M is the shell mass. This simple parameter-based approach achieves extended spin duration without increasing device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The optimized dimensional relationship between the shell and ball parameters ensures a smooth and flipping rotational movement, maintaining spin even as the initial rotational force diminishes, enhancing the spin top's performance.
Implementation Method 1
A ball is nested within the cavity of the shell. The ball has a radius. The radius of the ball is a length between a center of the ball to an exterior surface of the ball. The center of the ball is a distance from the center of the cavity when the ball is positioned at each of the ends of the cavity.
Implementation Method 2
The pair of variables is the radius of the shell and the radius of the ball. The constant is the distance. There has thus been outlined, rather broadly, the more important features of the disclosure in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated.
Data Source
AI summary
A rotating spin top device for creating rotational force for a spin top includes a shell. The shell has a radius being a length between a center of the shell and an exterior surface of the shell. The shell has a cavity where a ball is nested within. The ball has a radius being a length between a center of the ball and an exterior surface of the ball. A length from the center of the ball to a center of the cavity defines a distance when the ball is positioned at an end of a pair of ends of the cavity. The radius of the ball and the radius of the shell are relative to the distance whereby defining a proportion. The proportion creates the rotational movement of the rotating spin top device.