Speaker Damper with Multi-Level Planar Surface for Rupture Prevention
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Solution Overview
Problem
Conventional speakers with hard-to-deform dampers suppress oscillatory system amplitude excessively, reducing sound pressure efficiency and risking damage from excessive input signals.
Innovation Solution
A damper with a corrugation portion, a planar portion having a planar surface, and an attachment portion, where the planar surface is extended parallel to the attachment portion at a different height, to control deformation and prevent damage from excessive input signals while maintaining sound pressure efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the damper is formed of a hard-to-deform material to suppress amplitude of oscillatory system, then damage from excessive input signals is prevented, but sound pressure efficiency is reduced
Solution Approach 1:
The damper is designed with different regions having different deformation characteristics: the corrugation portion (first region) is made easily deformable to maintain sound pressure efficiency during normal operation, while the planar portion (second region) is made hard-to-deform to prevent damage from excessive input signals. This local differentiation of mechanical properties resolves the contradiction between reliability and productivity.
2Productivity
If the damper is made easily deformable to maintain sound pressure efficiency, then acoustic performance is improved, but the oscillatory system becomes vulnerable to excessive input signals
Solution Approach 1:
The damper structure divides the deformation function across different regions: the corrugation portion handles normal operational deformation to maintain acoustic performance, while the planar portion provides structural reinforcement to protect against excessive signals, resolving the contradiction between productivity and reliability.
3Device complexity
If the planar surface is extended at the same height as the attachment portion, then structural simplicity is maintained, but deformation control under excessive input signals is insufficient
Solution Approach 1:
The planar surface is extended in the thickness direction (vertical dimension) at a height different from the attachment portion, creating a multi-level structure. This dimensional change allows the planar portion to provide enhanced deformation control and structural support without significantly increasing overall complexity, resolving the contradiction between device complexity and reliability.
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 damper effectively suppresses undue deformation and damage from excessive input signals, ensuring sound pressure efficiency and mechanical strength, improving acoustic characteristics and reducing the risk of rupture.
Implementation Method 1
the corrugation portion is formed around the opening portion, the corrugation portion including at least one convexoconcave arranged in a radial direction
Data Source
AI summary
A damper and a speaker apparatus includes the damper, which suppresses damage to an oscillatory system from an excessive input signal, enabling an efficiency increase of the speaker apparatus. As a damper has a planar surface, undue deformation of the oscillatory system due to an excessive input signal is suppressed, and damage to the oscillatory system can be suppressed. Furthermore, since the deformation of a corrugation portion by a normal input signal is hardly prevented, a reduction in sound pressure of the speaker apparatus with respect to an input signal is suppressed, enabling an increase in efficiency. Furthermore, the planar surface is extended at a height in a thickness direction different from that of an attachment portion. Thus, rising portions are deformed when a voice coil bobbin is oscillated, enabling suppression of rupture of the damper in the vicinity of a boundary between the planar surface and the attachment portion.