Segmented Vibrato Bar for Uniform Multi-String Pitch Shift
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vibrato mechanisms for string instruments fail to uniformly adjust the pitch of multiple strings due to differences in string tension and elasticity, leading to discordant chords and unreliable operation.
Innovation Solution
A vibrato mechanism with a bar comprising segments of varying sizes to accommodate the properties of individual strings, and a stop mechanism using protrusions to prevent unintended rotation, ensuring uniform pitch adjustment and preventing friction-induced string interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single bar is used to connect all strings, then the device complexity is reduced, but the manufacturing precision and performance uniformity across different tension strings deteriorates
Solution Approach 1:
The bar is divided into multiple segments along its longitudinal axis, with each segment having different physical characteristics (size, shape, material composition) optimized for specific string tensions. This segmentation allows the single bar to accommodate multiple strings with different tensions while maintaining precise control over each string's vibrato effect, resolving the contradiction between device simplicity and manufacturing precision.
2Strength
If the bar is made larger to accommodate higher tension strings, then the strength is improved, but the weight of moving object increases
Solution Approach 1:
Different segments of the bar have different physical properties tailored to their specific functions. High-tension string segments are designed with greater strength characteristics, while low-tension string segments are optimized for lighter weight. This local differentiation allows the bar to achieve the necessary strength for high-tension strings without uniformly increasing the weight of the entire bar, thus resolving the contradiction between strength and weight.
3Adaptability or versatility
If different sized segments are used for different tension strings, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
Multiple segments with different physical characteristics are merged into a single integrated bar structure that functions as one cohesive component. This merging approach provides the adaptability of having multiple specialized components while avoiding the complexity of assembling and coordinating separate devices for each string, thus resolving the contradiction between adaptability and 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 mechanism achieves uniform pitch changes across strings, maintaining chord harmony and reducing mechanical complexity and energy loss, while being compatible with various guitar designs.
Implementation Method 1
an actuator arm that is operatively connected to the bar such that the actuator arm, when engaged, causes the bar to rotate about its longitudinal axis
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A vibrato mechanism for a string instrument. Embodiments include a bar with a plurality of segments, each respective segment of the plurality of segments being configured to connect to a respective string of a plurality of strings of a string instrument. In some embodiments, a first segment of the plurality of segments has a first size and is configured to connect to a first string of the plurality of strings having a first tension, and a second segment of the plurality of segments has a second size that is different than the first size and is configured to connect to a second string of the plurality of strings having a second tension that is different than the first tension. Embodiments include an actuator arm that is operatively connected to the bar such that the actuator arm, when engaged, causes the bar to rotate about its longitudinal axis.