Treble Loudspeaker Phase Plug Mounting Structure
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Solution Overview
Problem
Existing compression-type treble loudspeakers face challenges in precise assembly due to thickness tolerance in gaskets, leading to fluctuations in SPL curves and sound distortion, requiring improved design for precise gap control between the diaphragm and phase plug.
Innovation Solution
A treble loudspeaker with an improved mounting structure featuring a phase plug channel and outlet as a single component, combined with a high-temperature resistant soft gasket between the phase plug and T-shaped iron, ensuring accurate sound guiding gaps and precise assembly, using materials like silica gel, rubber, or plastic for the gasket.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a gasket is added when assembling the phase plug to adjust the gap, then the gap can be adjusted, but thickness tolerance in the gasket causes range deviation and cannot meet the gap requirement
Solution Approach 1:
The invention extracts the gasket from the assembly process and replaces it with a directly machined stepped structure on the phase plug. The gap is determined by the precise machining of the phase plug's outer cylindrical surface and the mounting hole in the magnetic circuit assembly, eliminating gasket thickness tolerance from the gap dimension chain.
Solution Approach 2:
The invention replaces the mechanical gasket-based gap adjustment system with a precision machining-based gap control system. The gap is precisely controlled through the dimensional accuracy of the phase plug's cylindrical surface and the mounting hole, achieving better precision without relying on gasket thickness.
2Ease of operation
If a gasket is used for gap adjustment, then assembly flexibility is provided, but high requirements on assembly operator skill affect production efficiency
Solution Approach 1:
The phase plug's stepped structure performs multiple functions automatically: the first cylindrical surface provides precise positioning, the second cylindrical surface determines the gap dimension, and the conical surface ensures proper orientation. This self-positioning and self-aligning structure eliminates the need for operator skill in gap adjustment.
Solution Approach 2:
The gap dimension is predetermined by the machining of the phase plug's cylindrical surfaces before assembly. The stepped structure pre-establishes the correct gap dimension and positioning, so no additional adjustment action is needed during assembly, greatly improving production efficiency.
3Ease of manufacture
If the phase plug and diaphragm position relation is not precisely controlled, then assembly is easier, but the SPL curve fluctuates greatly in high frequency band causing sound distortion
Solution Approach 1:
The phase plug features localized precise machining at critical positions: the outer cylindrical surface for positioning, the stepped surfaces for gap control, and the conical surface for orientation. These localized precision features ensure the phase plug's position relative to the diaphragm is precisely controlled, preventing sound distortion while maintaining ease of assembly.
Data Source
AI summary
A treble loudspeaker with an improved mounting structure for a phase plug, having a T-shaped iron, a magnet, a washer, a phase plug and a diaphragm. The magnet is located between the T-shaped iron and the washer. The T-shaped iron has a central hole. The phase plug is inserted into the central hole and fixedly connected to the T-shaped iron. A soft gasket is provided at a plane junction between the phase plug and the T-shaped iron. The diaphragm is located above the phase plug to cover the phase plug, and a sound guiding gap is provided between the diaphragm and the phase plug.