Helical Sheet Music Box Reducing Thickness While Extending Playback
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Solution Overview
Problem
Conventional music box devices face challenges in playing music for a long time without increasing thickness, as they require additional components and complex mechanisms, and existing designs either result in a thick cylinder or a limited playing time due to the size of the music-playing medium.
Innovation Solution
A music box device featuring a helical plate-like sheet rotated by a driving mechanism with a star wheel and synchronizing rotary discs, allowing the sheet to be fed and played without applying a local load, enabling long playback time while maintaining a compact thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a cylinder type music box device increases the diameter of the cylinder to play music for a long time, then the playing duration is extended, but the thickness of the music box device becomes very thick
Solution Approach 1:
The invention transitions from a cylindrical configuration (playing in one dimension radially outward) to a flat disc configuration (playing in two dimensions with radial and circumferential directions). The pins are arranged on the outer peripheral surface of a disc, allowing the music-playing surface to extend circumferentially rather than only radially, thus extending playing duration without increasing thickness.
2Duration of action of moving object
If a tape type music box device increases the length of the tape to play music for a long time, then the playing duration is extended, but the number of components increases due to requiring feeding roll and receiving roll
Solution Approach 1:
The invention extracts and eliminates the feeding roll and receiving roll components from the tape type music box device. By using a disc with pins directly mounted on the music-playing surface, the system removes the need for separate tape feeding mechanisms, thereby reducing component count while maintaining extended playing capability through circumferential pin arrangement.
3Duration of action of moving object
If a tape type music box device feeds the tape to play music for a long time, then the playing duration is extended, but the mechanism becomes complicated due to requiring gradual change of rotational speed
Solution Approach 1:
The invention eliminates the dynamic speed adjustment mechanism required in tape type devices. The disc type configuration with circumferentially arranged pins allows constant rotational speed operation, as the music playback sequence is determined by the fixed radial and circumferential positions of pins on the disc, removing the need for gradual rotational speed changes during tape feeding.
4Length of stationary object
If a disc type music box uses a thin disc to reduce the overall thickness, then the thickness is reduced, but the playing time is limited due to circumferential length of the disc
Solution Approach 1:
The invention maximizes the use of the disc's circumferential dimension by arranging pins not only radially but also circumferentially around the disc. This two-dimensional pin arrangement (radial and circumferential directions) allows extended playing duration on a thin disc by utilizing the full circumferential length, thus resolving the contradiction between thin profile and long playing time.
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 device achieves extended music playback without increasing thickness by using a helical sheet that can be stably rotated and fed, allowing un-played and played portions to stack, thus reducing the overall thickness and simplifying the mechanism.
Implementation Method 1
another claw plucks the vibration valve to play music
Data Source
AI summary
Provided is a novel music box device that can play music for a long time and can also suppress a thickness.The present invention relates to a music box device including: a sheet that has a playing engagement part and is rotated by a driving means; a star wheel arranged oppositely to the sheet and having two or more claws on an outer peripheral surface; and a vibration valve arranged adjacent to the star wheel. In the music box device, as the sheet is rotated by the driving means, the playing engagement part is linked with one claw to rotate the star wheel while another claw plucks the vibration valve to play music, and the sheet has a helical plate shape.