Rain Stick with Segmented Internal Volume for Varied Acoustic Output
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Solution Overview
Problem
Conventional rain sticks produce limited and uniform sounds due to their design constraints, and lack suitable stands for easy use and storage.
Innovation Solution
A musical instrument with a housing divided into upper and lower portions by a barrier disc, featuring ribs and open discs to guide particle fill materials through different paths, producing unique sounds, and a stand with an open frame to support the instrument in an upright orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single tube with uniform internal structures is used, then the instrument structure is simple, but the sound variety is limited
Solution Approach 1:
The internal volume is divided into multiple sections by barrier discs, with each section containing different rib patterns and particle fill materials. This segmentation allows each section to produce distinct sounds, resolving the contradiction by creating sound variety through internal division while maintaining a relatively simple overall tube structure.
Solution Approach 2:
Different sections of the tube are given different local characteristics through varying rib configurations (spiral, straight, crossed), different particle materials (beads, seeds, beans), and different barrier disc arrangements. This local differentiation enables diverse sound production throughout the instrument while the external structure remains simple.
2Adaptability or versatility
If multiple particle fill materials and internal structures are used, then sound variety is improved, but the instrument structure becomes complex
Solution Approach 1:
The complex internal structures are segmented into separate sections divided by barrier discs. Each section can independently contain different rib patterns and particle materials, allowing sound variety to be achieved through modular internal divisions rather than a single complex structure, thus managing overall instrument complexity.
Solution Approach 2:
Multiple internal elements (ribs, barrier discs, particle materials) are nested within the tube structure in a hierarchical manner. The barrier discs create nested compartments, and ribs are nested within those compartments, allowing complex sound-producing elements to be organized within a relatively simple external tube form.
3Ease of manufacture
If conventional rain stick design is used, then the instrument is easy to manufacture, but suitable stands for easy use and storage are lacking
Solution Approach 1:
The stand is designed with an adjustable support mechanism that can accommodate instruments of different lengths and diameters. The same stand structure serves both display and storage functions, and can be adjusted for different instrument configurations, resolving the contradiction by providing operational convenience without complicating the manufacturing of the instrument itself.
Data Source
AI summary
A musical instrument includes a housing having an open first end, an open second end, and a sidewall extending therebetween. The housing defines an internal volume. The musical instrument also includes: a first end cap covering the open first end of the housing; a second end cap covering the open second end of the housing; a barrier disc positioned in the internal volume dividing the internal volume into an upper portion and a lower portion; a first plurality of ribs positioned in the upper portion of the musical instrument arranged in a first pattern; a second plurality of ribs positioned in the lower portion of the musical instrument arranged in a second pattern; a first particle fill material in the upper portion of the internal volume; and a second particle fill material in the lower portion of the internal volume.