Thin Phone Receiver Diaphragm Area and Loudness
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Solution Overview
Problem
The existing thin-type phone receivers have a small effective area for sound production due to the coil being sleeved on the root segment of the spring piece, leading to low loudness and increased complexity in manufacturing.
Innovation Solution
A thin-type phone receiver design where the coil is sealedly fixed in a mounting area formed by the frame and housing, with a sealing membrane covering the entire diaphragm, allowing all portions of the diaphragm to contribute to vibration and sound production, thereby increasing the effective area for sound generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the coil is sleeved on the root segment of the spring piece, then the structure is simplified, but the effective area for sound production becomes small
Solution Approach 1:
Instead of sleeving the coil on the root segment of the spring piece (conventional approach), the patent inverts the arrangement by placing the coil on the vibration part of the spring piece where the membrane is spread. This inversion allows the entire spring piece to contribute to sound production, maximizing the effective area while maintaining structural simplicity.
2Ease of manufacture
If the membrane only covers the vibration part, then the manufacturing process is simplified, but the loudness becomes low
Solution Approach 1:
The patent makes the entire spring piece serve the dual function of providing structural support and contributing to sound production. By spreading the membrane over the whole spring piece and placing the coil accordingly, every portion of the spring piece becomes an active sound-producing element, thereby increasing loudness without complicating the manufacturing process.
3Area of moving object
If the coil is placed on the vibration part, then the effective area for sound production increases, but the manufacturing complexity increases
Solution Approach 1:
The patent merges the functions of the spring piece and the membrane by having the membrane spread over the entire spring piece rather than just the vibration part. This merging allows the coil to be placed on the vibration part while maintaining manufacturing simplicity, as the membrane-spring integration eliminates the need for separate components and assembly steps.
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 design enhances the loudness and sound-producing performance of the phone receiver by maximizing the diaphragm's vibrating area and simplifying the manufacturing process.
Implementation Method 1
when the coil is energized, an electromagnetic field generated by the coil interacts with a fixed magnetic field of the two permanent magnets, so as to cause the vibration part to vibrate together with the membrane to drive the air inside the sound-producing cavity to vibrate and produce sound
Data Source
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AI summary
The present application provides a thin-type phone receiver, comprising a housing, a vibration membrane assembly and a coil. The vibration membrane assembly comprises a frame, a diaphragm and a sealing membrane. Because a mounting area is formed by a part of a side wall of the frame and an inner wall of the housing, the coil is sealedly fixed in the mounting area and sealedly sleeved on the frame, and the spreading sealing membrane seals an entirety of a first gap between the frame and the diaphragm, thereby, the vibration membrane assembly separates a mounting cavity of the housing into two cavities that are arranged side by side and not communicated with each other. When the coil is energized and an electromagnetic field generated by the coil interacts with a fixed magnetic field of the permanent magnets in the phone receiver, the entire diaphragm vibrates, thus, as the coil is sleeved on the vibration membrane assembly to form the thin-type phone receiver, all the portions of the diaphragm covered with the sealing membrane contribute to sound production, so that an effective area of the diaphragm for vibrating is maximized, thereby increasing the loudness of the phone receiver.