Vibration Sounding Device Sheet-Stamped Weight Assembly
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Solution Overview
Problem
Existing integrated sounding devices in electronic equipment require complex molding processes and high production costs due to thick weights made by powder sintering, which complicates the integration of vibration and sound prompting functions.
Innovation Solution
A vibration sounding device that integrates the vibration motor into the speaker, using a housing body with a containment cavity, a magnetic circuit system, an elastic assembly, and a weight assembly made of sheet-stamped parts, where the drive coil is movable perpendicular to the vibration direction, simplifying the molding process and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If weights are made by powder sintering to achieve the required mass, then the vibration function is realized, but the molding process becomes complicated and production cost increases
Solution Approach 1:
The patent changes the manufacturing method parameter from powder sintering to sheet stamping. The weight assembly is formed by stamping metal sheets into specific shapes (including curved surfaces) and assembling multiple stamped parts, which simplifies the manufacturing process while achieving the required weight and vibration characteristics.
Solution Approach 2:
The weight assembly is divided into multiple stamped metal parts that are assembled together. This segmentation allows each part to be manufactured independently through simple sheet stamping processes, avoiding the complexity of powder sintering while maintaining the overall weight function.
2Adaptability or versatility
If an integrated sounding device with both speaker and vibration motor structures is provided, then both sound prompt and vibration prompt functions are achieved, but the number of parts increases and device size increases
Solution Approach 1:
The patent merges the vibration motor structure into the speaker assembly. The weight assembly, which is part of the speaker structure, serves dual purposes: it is both a structural component of the speaker and the vibrating mass for vibration generation. This integration eliminates the need for a separate vibration motor, reducing part count while maintaining both sound and vibration prompt functions.
Solution Approach 2:
The weight assembly is designed to perform multiple functions: it provides the necessary mass for vibration generation, serves as a structural component of the speaker, and participates in both acoustic and vibratory operations. This multi-functionality reduces the overall number of components needed in the device.
3Weight of moving object
If weights with large thickness are used to achieve sufficient mass, then the vibration function is ensured, but the device thickness increases and miniaturization is hindered
Solution Approach 1:
Instead of increasing thickness in one dimension to achieve the required mass, the patent uses multiple thin stamped metal parts assembled together in three-dimensional configuration. This approach achieves the necessary weight through spatial arrangement rather than increasing single-dimension thickness, enabling device miniaturization.
Solution Approach 2:
The weight assembly uses composite construction with multiple stamped metal parts (including different materials such as stainless steel or aluminum alloy sheets) assembled together. This composite structure achieves the required mass and vibration characteristics while maintaining thin individual component profiles, facilitating overall device thinness.
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 reduces the number of parts, facilitates miniaturization, and lowers production costs while improving vibration and sound prompting performance by using sheet-stamped weights and a optimized magnetic circuit system.
Implementation Method 1
a magnetic circuit system for driving the vibration system to move in a first direction
Implementation Method 2
a drive coil fixed to the weight assembly and being movable along a second direction together with the weight assembly, the second direction being perpendicular to the first direction
Data Source
AI summary
The application relates to a vibration sounding device including: a housing body with a containment cavity and a sounding unit arranged in the containment cavity. The sounding unit includes a vibration system and a magnetic circuit system. The magnetic circuit system includes a main magnet and a secondary magnet assembly. The vibration sounding device also includes an elastic assembly, a weight assembly, and a drive coil. The second direction is perpendicular to the first direction. By virtue of the configuration, it is beneficial to simplify the forming process of the weight assembly, reduce the production cost, and also facilitate the replacement of the drive coil.