Loudspeaker Internal Damper Layout to Increase Driving Force
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Loudspeakers in electronic devices suffer from insufficient sensitivity due to a small electromagnetic driving force caused by the damper limiting the volume of the yoke and the length of the voice coil.
Innovation Solution
The damper is positioned in a region enclosed by the sleeve, allowing the magnet and voice coil to be larger in volume and length without interference, with additional components like a pole piece and support tube enhancing the magnetic field strength and voice coil movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the damper is positioned to support the voice coil, then the voice coil is stabilized, but the volume of the yoke and length of the voice coil are limited, reducing electromagnetic driving force
Solution Approach 1:
The patent repositions the damper from a lateral support position to an internal position within the sleeve enclosure. This spatial reconfiguration allows the magnet and voice coil to extend fully along the sleeve's length without being constrained by the damper's position, thereby increasing the electromagnetic driving force while the damper continues to provide necessary support functions
2Reliability
If the damper is positioned to support the voice coil, then the voice coil is stabilized, but the sensitivity of the loudspeaker becomes insufficient
Solution Approach 1:
By moving the damper inside the sleeve enclosure, the patent enables larger magnet volume and longer voice coil length, which directly increase the electromagnetic driving force and improve loudspeaker sensitivity. The damper maintains its support function while no longer constraining the dimensions of the electromagnetic components
3Force
If the magnet and voice coil are made larger to increase electromagnetic driving force, then the driving force increases, but the device thickness increases
Solution Approach 1:
The patent places the damper inside the sleeve enclosure, nesting it within the existing structure. This allows the magnet and voice coil to be positioned along the sleeve's length rather than requiring additional thickness, enabling larger electromagnetic components without increasing the overall device thickness
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
This configuration increases the electromagnetic driving force and sensitivity of the loudspeaker, enabling robust performance while maintaining a reduced thickness suitable for ultra-thin designs.
Implementation Method 1
the voice coil is energized, so that the voice coil vibrates in a direction of a center line of the yoke, to generate a sound
Data Source
AI summary
This application relate to the field of electronic device technologies, and in particular, to a loudspeaker and an electronic device. Embodiments of this application are provided to resolve a technical problem of insufficient sensitivity of a loudspeaker caused by a small electromagnetic driving force that drives a voice coil to vibrate. According to a loudspeaker and an electronic device in embodiments of this application, a yoke includes a bottom part and a sleeve located on the side of the bottom part. An annular magnet is sleeved on the outer side of the sleeve. A voice coil is sleeved on the sleeve and located between the magnet and the sleeve. A damper is located in a region enclosed by the sleeve. An outer edge of the damper is connected to the voice coil, and a middle part of the damper is connected to the yoke.