Tool-Free Speaker Box Holder With Radial Wedge Clamping
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Solution Overview
Problem
Loudspeaker boxes experience instability and acoustic disturbances due to play between the flange and speaker stand, caused by varying flange diameters and non-hollow cylindrical designs, leading to unpredictable positioning during operation.
Innovation Solution
A holder with a clamping device that can be actuated tool-free via an adjusting handle, accommodating the flange of the loudspeaker box and eliminating play by applying force radially through expanding wedges and clamping elements, ensuring secure attachment and adjustable fit for different diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple cylindrical flange connection is used, then the assembly and disassembly is easy, but the connection becomes unstable with play and vibration
Solution Approach 1:
The clamping device transitions from a static cylindrical connection to a dynamic adjustable clamping mechanism. The clamping jaw can move radially to adapt to different flange diameters and apply varying clamping forces, transforming the connection from rigid but loose to dynamically secure while maintaining ease of operation through the adjusting handle.
Solution Approach 2:
The invention changes the connection parameters by introducing an adjustable clamping force and variable radial position of the clamping jaw. The adjusting handle allows users to modify the clamping pressure and position to eliminate play while accommodating different flange sizes, thereby improving reliability without sacrificing ease of assembly.
2Device complexity
If a fixed cylindrical connection is used, then the structure is simple, but it cannot accommodate different flange diameters
Solution Approach 1:
The holder is designed with universal adaptability through the adjustable clamping device that can accommodate multiple flange diameters (35mm European standard, 38mm American standard, and intermediate sizes). The single holder structure performs multiple functions by adjusting the clamping jaw position and force, eliminating the need for different holders for different flange sizes while maintaining relatively simple construction.
3Ease of operation
If play is allowed in the connection for easy assembly, then assembly is simpler, but acoustic disturbances occur due to vibration
Solution Approach 1:
The clamping device applies preliminary clamping action through the adjusting handle before the speaker box is fully placed on the holder. This preliminary clamping eliminates play and prevents vibration-induced acoustic disturbances while maintaining ease of placement, as the clamping force is already in place to secure the connection.
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 holder provides quick, secure, and stable attachment of loudspeaker boxes to speaker stands, minimizing acoustic disturbances and maintaining a consistent position, while allowing easy assembly and disassembly without tools.
Implementation Method 1
The clamping device preferably has an expanding wedge which can be moved axially in the housing and which interacts via at least one wedge surface with at least one counter-wedge surface of the clamping element
Data Source
Figure 1~5
Figure 6~10
AI summary
The holder has a clamping device actuated by an adjusting handle without tool and arranged in tubular housing (2). The clamping device includes clamping elements (7a, 7b) that are radially movable through an opening in the housing. A spreading wedge (6) of the clamping device is axially movable in the housing and cooperates with counter wedge surfaces (26a, 26b) of the clamping elements over wedge surfaces (25a, 25b). The handle is formed as a rotary handle (8), which acts on a sliding element (15) that is arranged in the housing in a torque-proof and axially movable manner.