Conductive Microphone Case Integrating Light Guide and Circuit Board
Solution Overview
Problem
Conventional microphones with light emitting portions for visual operation state recognition face challenges in achieving a compact configuration due to the lack of electromagnetic shielding, as the optically transmissive resin used for light emission does not provide shielding, leading to separation of the light source mounting board from the circuit board.
Innovation Solution
A tubular microphone case with a conductive holding member that integrates the light source mounting board and circuit board, using a light guide member with a protrusion and optically transmissive properties to enhance light efficiency and allow for electrical shielding by accommodating both boards within the conductive case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light source mounting board and circuit board are separated to provide electromagnetic shielding, then the electrical shielding property is improved, but the device complexity and size increase
Solution Approach 1:
The patent merges the light source mounting board and circuit board into a single integrated board structure. The light source mounting portion and circuit portion are formed as one piece, eliminating the need for separate boards while maintaining electromagnetic shielding effectiveness. This integration directly resolves the contradiction by combining functions that were previously separated.
Solution Approach 2:
The integrated board serves multiple functions simultaneously: it acts as both the light source mounting board and the circuit board, while also providing electromagnetic shielding. The single board structure performs the dual roles of supporting optical components and electrical circuits, thereby reducing device complexity while maintaining shielding properties.
2Reliability
If the light source mounting board is separated from the circuit board to enable shielding, then the electrical shielding property is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent combines the light source mounting board and circuit board into a single integrated board, reducing the number of assembly steps. Instead of separately mounting and aligning two distinct boards, the integrated structure requires only one assembly operation, thereby simplifying the manufacturing process while maintaining shielding effectiveness.
Solution Approach 2:
While the board is integrated, the patent segments the functional areas into a light source mounting portion and a circuit portion within the same board structure. This segmentation allows for specialized design of each functional area while maintaining the benefits of integration, making manufacturing easier compared to handling completely separate boards.
3Illumination intensity
If an optically transmissive resin is used for light emission, then the light emission efficiency is improved, but the electrical shielding property deteriorates
Solution Approach 1:
The patent integrates the light source mounting board with the circuit board, allowing the use of optically transmissive resin for light emission while maintaining electrical shielding through the integrated structure. The merger enables the resin to perform its optical function without compromising shielding, as the integrated board provides the shielding barrier.
Solution Approach 2:
The integrated board structure effectively creates a composite system combining optically transmissive materials (for light emission) with conductive or shielding materials (for electromagnetic shielding). This composite approach allows both functions to coexist: the resin provides light transmission while the integrated board structure provides electrical shielding.
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 solution improves the electrical shielding property of the microphone, enabling a compact configuration while maintaining efficient light emission and visual recognition, even with small power consumption light sources.
Implementation Method 1
a light guide member including a protrusion and having an optically transmissive property
Implementation Method 2
a tubular microphone case having conductivity... a holding member that has conductivity, holds the light source mounting board and the circuit board
Data Source
AI summary
A microphone includes a tubular microphone case having conductivity, a circuit board on which a circuit is configured, the circuit being used for an operation of a microphone unit that converts an audio signal into an electrical signal, a light source that is accommodated in a position close to a first end of the microphone case and emits light, a light source mounting board on which the light source is placed, a holding member that has conductivity, holds the light source mounting board and the circuit board, and is fixed to the microphone case, and a light guide member including a protrusion. The holding member includes a light source mounting board accommodating portion that accommodates the light source mounting board, a circuit board accommodating portion that accommodates the circuit board, and a hole that can accept the protrusion.