Speaker Rigging Locking Mechanism for Precise Splay Angle Adjustment
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Solution Overview
Problem
Existing rigging systems for line array speakers lack efficient mechanisms to maintain precise splay angles during installation and operation, leading to potential misalignment and suboptimal sound coverage in large venues.
Innovation Solution
A speaker rigging system featuring a cam with offset steps for adjusting splay angles, combined with a locking mechanism using lever arms and a sector with teeth, allows for precise angle selection and locking, ensuring consistent sound distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a rigging system uses a simple connection mechanism for speaker assemblies, then the device complexity is reduced, but the manufacturing precision and reliability of splay angle adjustment deteriorates
Solution Approach 1:
The locking mechanism is segmented into distinct functional components: a cam element with multiple positioned surfaces for different splay angles, a locking lever with pawl and spring for engagement, and a lever arm for actuation. This segmentation allows each component to perform its specific function efficiently while maintaining overall system precision without excessive complexity.
Solution Approach 2:
The mechanism uses a cam element that can rotate between locked and unlocked positions, dynamically transitioning between different splay angle configurations. The cam's positioned surfaces engage with the locking lever at specific rotational positions, enabling precise angle selection while maintaining a relatively simple overall structure.
2Adaptability or versatility
If a rigging system uses a cam mechanism with multiple positioned surfaces for splay angle adjustment, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The cam element serves multiple functions: it provides different positioned surfaces for various splay angles, acts as a locking surface for the pawl, and serves as the actuation interface for the lever arm. This multi-functionality allows a single component to enable adaptability across multiple angles without proportionally increasing overall mechanism complexity.
Solution Approach 2:
The spring-loaded pawl automatically engages with the cam's positioned surfaces when the lever arm is actuated, providing self-locking functionality. The mechanism uses the cam's own geometry and the spring force to maintain the locked position, reducing the need for additional complex locking components.
3Reliability
If a rigging system uses a spring-biased pawl for locking, then the reliability of angle maintenance is improved, but the device complexity increases
Solution Approach 1:
The spring-loaded pawl provides automatic engagement and maintenance of the locked position through elastic force. The spring continuously biases the pawl toward the cam surface, ensuring reliable locking without requiring additional actuators or complex control mechanisms. The system uses the spring's stored energy to maintain reliability throughout operation.
4Adaptability or versatility
If a rigging system allows adjustment of splay angles during operation, then the adaptability is improved, but the stability of the speaker arrangement deteriorates
Solution Approach 1:
The cam mechanism enables dynamic adjustment of splay angles by rotating the cam to different positioned surfaces. Each position provides a stable locked configuration through the pawl engagement, allowing the system to transition between states while maintaining stability in each selected state. The lever arm provides a clear actuation interface for controlled transitions.
Solution Approach 2:
The cam element is pre-configured with multiple positioned surfaces at specific angles during manufacturing. This preliminary preparation allows operators to simply select from pre-determined stable configurations rather than adjusting angles freely, maintaining stability while providing adaptability across multiple preset positions.
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 system enables precise adjustment and locking of splay angles between speaker assemblies, enhancing sound coverage uniformity and stability during installation and operation, particularly in large venues.
Implementation Method 1
The pawl extends from the intermediate portion of the lever arm and is spring-biased toward the sector for engaging the sector between adjacent teeth to lock the cam to the frame in a locked condition
Implementation Method 2
a cam pivotally connected to the frame about a pivot axis to pivot relative to the frame for adjusting a splay angle
Implementation Method 3
The first lever arm is pivotally connected to the frame with a proximal end and an intermediate portion extending between the proximal end and the pivotal connection
Data Source
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AI summary
A speaker rigging system is provided with a frame, a cam pivotally connected to the frame about a pivot axis and a sector secured to the cam with a peripheral surface with a plurality of teeth formed therein. The speaker rigging system also includes a first lever arm and a pawl. The first lever arm is pivotally connected to the frame with a proximal end and an intermediate portion extending between the proximal end and the pivotal connection to be oriented proximate to the sector. The pawl extends from the intermediate portion of the lever arm and is spring-biased toward the sector for engaging one of the plurality of teeth to lock the cam to the frame in a locked condition. Alternatively or additionally a second lever arm is pivotally connected to the frame.