Compact Speaker Module With Integrated Linear Motor and Independent Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The conflict between the need for improved performance of speaker modules and vibration motors in compact electronic devices, where increasing size is not feasible, and the inability to independently control these components for diverse application scenarios, leading to poor sound quality and vibration issues.
Innovation Solution
A speaker module design that integrates a speaker unit and a linear motor module with a shared driving coil, utilizing a mounting groove in the magnetic circuit system and a protrusion of the linear motor module to reduce stacking height, allowing independent control and a compact structure, while maintaining performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the size of the speaker module and vibration motor is increased to improve performance, then the performance is improved, but the occupied space increases which is not feasible in compact electronic devices
Solution Approach 1:
The patent combines the speaker module and vibration motor into a single integrated assembly, sharing common components including the magnetic circuit system, driving coil, and housing. This merging allows both functions to coexist in a compact form factor without requiring separate spaces for each component, thereby improving performance while maintaining a small occupied volume.
Solution Approach 2:
The magnetic circuit system and driving coil serve dual purposes: they function as the magnetic circuit and driving coil for the speaker module, and simultaneously serve as the magnetic circuit and driving coil for the vibration motor. This multi-functionality eliminates the need for duplicate components, reducing overall size while maintaining performance of both functions.
2Volume of stationary object
If the speaker module and vibration motor share one driving coil and vibrate in the same direction, then the structure is compact, but they cannot be controlled independently for diverse application scenarios
Solution Approach 1:
The integrated assembly is divided into functionally independent control paths. The speaker unit has its own diaphragm and voice coil system that can be controlled separately from the vibration motor's eccentric weight system. This segmentation allows independent control of each function despite their physical integration, enabling diverse application scenarios such as audio playback without vibration or vibration without audio.
Solution Approach 2:
The system incorporates dynamic control capabilities where the driving coil can be selectively activated to produce different motion patterns. By controlling the frequency and amplitude of the driving signal, the system can dynamically switch between speaker mode (producing sound through diaphragm vibration) and vibration motor mode (producing tactile feedback through eccentric weight rotation), providing adaptability for different application scenarios.
3Object-generated harmful factors
If low-frequency music signals are filtered to eliminate vibration motor vibration, then the vibration is reduced, but the sound quality deteriorates because music signals have no low-frequency effect
Solution Approach 1:
The vibration motor function is extracted as a separate controllable unit within the integrated assembly. By separating the vibration generation mechanism (eccentric weight) from the audio generation mechanism (diaphragm and voice coil), the system can selectively activate only the audio function when music playback is required, eliminating unwanted vibration without needing to filter the music signal. This extraction preserves sound quality while removing harmful vibration effects.
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 achieves a compact structure that reduces space occupancy, enables independent control of the speaker unit and linear motor module, improving sound and vibration effects, and enhances user experience in electronic devices.
Implementation Method 1
the linear motor module comprises a housing, a coil and a vibrating assembly... the coil is provided in the protrusion
Implementation Method 2
the speaker unit comprises a magnetic circuit system provided with a mounting groove... the action force and reaction force between the coil and the magnetic circuit
Data Source
AI summary
A speaker module and an electronic device are disclosed, comprises a module casing, a speaker unit and a linear motor module. The module casing is provided with a mounting cavity; the speaker unit is provided in the mounting cavity and comprises a magnetic circuit system provided with a mounting groove; the linear motor module is provided in the mounting cavity and comprises a housing, a coil and a vibrating assembly; the housing comprises a body part and a protrusion protruding outward; the body part is at a bottom of the magnetic circuit system; the protrusion extends into the mounting groove; the coil is provided in the protrusion part; the vibrating assembly is provided in the body part. The overall structure of the speaker module may be more compact, the speaker unit and the linear motor module may be controlled independently which improves the use effect of the speaker module.