Drum Apparatus with Rocker Assembly for Selective Snare Activation
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Solution Overview
Problem
Cajón drums with integrated snare features often have limitations in playability, as the snare is either always on or requires manual operation, which is inconvenient during playing, and additional percussion elements like bells or rattles are not easily controllable, leading to unintended sounds.
Innovation Solution
A drum apparatus with a rotatable snare bar and a rocker assembly that allows the snare to be selectively turned on and off by tilting the drum, along with adjustable sound holes and internal percussion accessories like shakers and cymbals for enhanced playability and sound control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the snare is always on or requires manual operation, then the snare feature is reliably activated, but the ease of operation deteriorates as manual hand operation is inconvenient during playing
Solution Approach 1:
The drum apparatus automatically activates or deactivates the snare feature based on its own positioning state (tipped back vs. flat) without requiring manual hand operation. The actuator leg mechanically senses the drum's position and automatically controls the snare bar rotation, making the system self-regulating and eliminating the need for manual intervention during playing.
Solution Approach 2:
The snare activation state dynamically changes based on the drum's physical position. When the drum is tipped back, the actuator leg shifts downward, rotating the snare bar into contact with the front wall (snare on). When the drum is flat, the actuator leg shifts upward, rotating the snare bar away from contact (snare off). This dynamic response to positional changes provides automatic control.
2Adaptability or versatility
If additional percussion elements are integrated, then the sound variety is improved, but the device complexity increases making control difficult
Solution Approach 1:
The drum apparatus integrates multiple percussion functions (snare, bells, rattles, shakers, cymbals) into a single device that can be controlled through a unified mechanism—the drum's positioning. By tipping the drum back, the player simultaneously activates multiple percussion elements, eliminating the need for separate control mechanisms for each element and simplifying the overall control structure.
Solution Approach 2:
Multiple percussion control functions are merged into a single positional control mechanism. The actuator leg and lever assembly serve as a universal controller that, through the drum's positioning, simultaneously manages the snare bar rotation and the activation of internal percussion accessories, reducing the number of independent control systems needed.
3Ease of operation
If the snare bar is rotatably installed to enable selective contact, then the ease of operation improves, but the device complexity increases due to additional mechanical components
Solution Approach 1:
The control mechanism transitions from manual hand operation in one dimension to positional control in another dimension (spatial orientation of the drum). By utilizing the drum's tipping motion, the system controls snare activation through a different dimensional parameter, simplifying the interaction model despite adding rotational mechanics.
Solution Approach 2:
The actuator leg and lever assembly serve as intermediary mechanical components that translate the drum's positional state into snare bar rotation. These intermediaries automatically convert the macroscopic positioning action into the microscopic rotational adjustment needed for snare contact, reducing the need for direct manual manipulation of the snare bar itself.
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
Enables convenient and selective operation of the snare feature and additional percussion elements during play, improving sound control and variety without requiring manual hand operation, enhancing the overall playing experience.
Implementation Method 1
a lever mechanically coupled to the snare bar at a first end of the lever and further comprising an actuator leg pivotally coupled to and extending downwardly from an opposite second end of the lever
Implementation Method 2
the lever being pivotally installed within the drum apparatus on a support post coupled to the lever intermediate the first and second ends thereof
Data Source
AI summary
A drum apparatus comprising at least a front wall, a snare bar rotatably installed substantially parallel to and offset from the front wall inner surface and having at least one snare wire extending substantially vertically therefrom so as to be adjacent to and selectively in contact with the front wall inner surface, and a rocker assembly comprising a lever mechanically coupled to the snare bar at a first end of the lever and further comprising an actuator leg pivotally coupled to and extending downwardly from an opposite second end of the lever pivotally installed within the drum apparatus on a support post coupled to the lever intermediate the first and second ends thereof, whereby the drum apparatus is shifted between first and second operational modes by selectively positioning the drum apparatus either substantially flat or tipped back so as to raise or lower the actuator leg.