Speaker Module Integral Elastic Element Injection Molding
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Solution Overview
Problem
The existing speaker module designs face challenges in ensuring airtightness and acoustic performance due to the complex and irregular shapes of joint parts between the speaker module and terminal electronic products, leading to lower labor efficiency and higher quality risks during manual assembly of elastic elements.
Innovation Solution
The speaker module integrates an elastic element with the housing through injection molding, featuring mutually matched undercut structures and using TPU, TPE, or silica gel materials, which are formed as an integral structure to ensure firm bonding and stability, reducing the likelihood of the elastic element falling off and improving assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual bonding of elastic elements with complex shapes is performed, then the elastic element can be fitted to irregular joint parts, but bonding accuracy decreases and labor efficiency reduces
Solution Approach 1:
The elastic element is integrated with the housing as a single integral structure through injection molding, eliminating the need for separate manual bonding operations. This merging of components resolves the contradiction by combining the fitting and bonding processes into one manufacturing step, thereby improving both ease of operation and bonding accuracy simultaneously.
Solution Approach 2:
The manual mechanical bonding process is replaced with an injection molding process that uses material flow and pressure to bond the elastic element to the housing. This substitution eliminates manual labor and improves bonding accuracy through controlled manufacturing parameters, while maintaining the ability to fit complex irregular shapes.
2Productivity
If manual bonding of elastic elements is performed, then assembly can be completed, but quality risks increase due to high accuracy requirements
Solution Approach 1:
By integrating the elastic element and housing into a single molded component, the process eliminates manual bonding variability and quality risks. The integral structure ensures consistent bonding quality across all units, improving reliability while maintaining assembly efficiency through simplified installation.
Solution Approach 2:
The manufacturing process transitions from manual bonding parameters (which vary between operators and conditions) to controlled injection molding parameters (temperature, pressure, time). This parameter control ensures consistent quality and reduces defects, improving both productivity and reliability.
3Adaptability or versatility
If elastic elements with complex shapes are used to fit irregular joint parts, then adaptability is improved, but the elastic elements become easy to fall off during assembly
Solution Approach 1:
The elastic element and housing are merged into a single integral structure through injection molding. This eliminates the interface between the elastic element and housing, preventing the elastic element from falling off while maintaining its ability to adapt to irregular joint part shapes through the molded geometry.
Solution Approach 2:
The elastic element is pre-formed with its final shape and attachment features during the injection molding process, before assembly. This preliminary formation ensures that the elastic element has inherent stability and cannot fall off during subsequent assembly operations, while still being adaptable to the specific joint part geometry.
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 solution enhances the bonding accuracy and stability of the elastic element, ensures airtightness between the speaker module and terminal electronic products, and improves acoustic performance while reducing labor intensity by eliminating the need for manual fitting of the elastic element.
Implementation Method 1
the elastic element and the housing are formed through injection molding to form an integral structure
Data Source
AI summary
Provided are a speaker module and a manufacturing method therefor. The speaker module comprises a housing and a speaker unit comprising a vibrating diaphragm component and a magnetic circuit component. A front acoustic cavity and a rear acoustic cavity are formed between the speaker unit and the housing. An elastic element is provided on the housing and coupled to the end surface of an open end of the front or rear acoustic cavity. Use of the speaker module can reduce a step of manual fitting of the elastic element, ensure precision and stability, so that the elastic element is not prone to fall off, and tightness between sound outlet hole of the speaker module and sound hole of mobile phone can be ensured. The manufacturing method for the speaker module also can be extended to manufacturing of other structures requiring injection of a soft or rigid material into another material.