Ultra-slim Speaker Unit with Two-step Damper for Low-frequency Sound
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Solution Overview
Problem
Ultra-slim speakers in TVs face challenges in achieving desired low-pitched sound characteristics and sound pressure due to structural limitations, which result in inadequate audio performance, and assembling difficulties due to narrow spaces and mismatched gold wire lengths.
Innovation Solution
A two-step damper structure with a larger voice coil diameter and a flat vibration plate, along with locking rims and coupling protrusions, is used to enhance sound pressure and facilitate assembly by matching gold wire lengths and improving the assembling process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the speaker has the ultra-slim structure, then the thickness is reduced, but the sound pressure is lowered
Solution Approach 1:
The damper is divided into a first damper and a second damper with different functions. The first damper focuses on controlling vibration at the edge, while the second damper emphasizes amplifying longitudinal amplitude at the center, allowing each segment to optimize specific aspects of sound performance within the ultra-slim constraint
Solution Approach 2:
The invention transitions from conventional single-layer damping structures to a multi-layer stacked damper configuration. By adding the second damper layer with different geometric features (protrusions vs. recesses), the system creates additional dimensional complexity that enables enhanced sound pressure generation without increasing overall thickness
2Length of moving object
If the speaker has the ultra-slim structure, then the thickness is reduced, but the low-pitched sound characteristic is not achieved
Solution Approach 1:
Different regions of the damper are designed with distinct properties: the first damper has edge-focused vibration control characteristics, while the second damper has center-focused longitudinal amplitude amplification characteristics. This local differentiation allows the ultra-slim speaker to achieve proper low-pitched sound characteristics through region-specific optimization
Solution Approach 2:
The invention uses composite damping structures combining two different damper designs (first damper with edge emphasis and second damper with center emphasis) into a unified system. This composite approach enables the ultra-slim speaker to achieve both thinness and reliable low-pitched sound performance
3Ease of manufacture
If the gold wires are connected to the contact terminal by exposing them to the outside, then the connection is made, but the vibration amplitude differs due to different wire lengths
Solution Approach 1:
The gold wires are pre-formed with bent portions at predetermined positions before final assembly. This preliminary shaping ensures that when the wires are connected to the contact terminal, their effective lengths are equalized, maintaining consistent vibration amplitude across all wires while preserving ease of connection
4Length of moving object
If the speaker unit has the ultra-slim structure, then the thickness is reduced, but the soldering work becomes inconvenient
Solution Approach 1:
The gold wires are pre-formed with bent portions at predetermined positions before final assembly. This preliminary shaping creates adequate working space for soldering operations while maintaining the ultra-slim overall structure, making soldering work convenient despite the thin thickness
5Productivity
If the screw is screw-coupled into the board while passing through the coupling hole, then the assembly is completed, but the assembling work is difficult due to hidden coupling holes
Solution Approach 1:
A guide pin is introduced as an intermediary component during the assembly process. The guide pin fits into the coupling hole and provides a visible guide for screw insertion, making the assembly process easier while still achieving complete screw coupling into the board through the coupling hole
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 provides superior low-pitched sound characteristics and sufficient sound pressure, simplifies the assembly process, and reduces noise generation by ensuring consistent gold wire lengths and secure connections, making it suitable for slim TVs.
Implementation Method 1
a voice coil 130 and a vibration plate 140, the voice coil 130 being provided on the vibration plate 140 and the vibration plate 140 being directly bonded to the inner rim 22 of the damper 20
Data Source
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AI summary
Disclosed is a speaker used as a household appliance. The speaker has an ultra-slim structure suitable for an ultra-slim TV and is applied to a woofer speaker representing a superior low-pitched sound characteristic. The speaker has the ultra-slim structure and improves the low-pitched sound characteristic and sound pressure by increasing the amplitude. Outer appearances of a damper (20) and a frame (10) are changed to enlarge a diameter of a voice coil (130) in comparison with an outer diameter of the speaker, the damper (20) has a two-step structure such that a longitudinal amplitude of an upper side of the damper (20) is increased to improve the low-pitched sound characteristic in a state in which a lower side of the damper (20) is put on the frame (10), and a size of a vibration plate (140) is enlarged to improve the low-pitched sound characteristic and sound pressure. A flat plate is used as the vibration plate (140).