Speaker Box Double-Screw Fastening for Vibration Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing speaker box structure is unstable and prone to air leakage when subjected to external forces, as the upper case easily detaches from the lower case due to inadequate fixation, which is only secured by a screw.
Innovation Solution
The speaker box design incorporates a double-screw system with a hat portion and a pole portion, where the upper case features projecting elements with a dual-section hole that securely engages with the lower case, preventing detachment during vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only the lower case is screwed to the external electronic device by a single screw, then the device complexity is reduced, but the structural stability deteriorates and the upper case easily detaches under external forces
Solution Approach 1:
The fastening structure is segmented into two independent screws, each responsible for securing one case (upper case and lower case separately). This segmentation distributes the mechanical load and prevents the upper case from detaching under external forces, while maintaining relatively simple individual fastening components.
Solution Approach 2:
The fastening mechanism transitions from a single-point attachment to a multi-point distribution across two screws. This dimensional expansion of the fastening system increases structural stability by creating multiple attachment vectors that resist external forces from various directions.
2Ease of manufacture
If only the lower case is screwed to the external electronic device, then the manufacturing process is simplified, but the reliability deteriorates and air leakage occurs due to upper case detachment
Solution Approach 1:
The sealing reliability is improved by segmenting the fastening function into two independent screws that secure both the upper and lower cases. This prevents the upper case from detaching and compromising the sealing, while each screw remains a simple, easily manufactured component that can be assembled through standard procedures.
3Device complexity
If a single screw is used to fix the speaker box, then the device complexity is minimized, but the strength deteriorates under external forces causing the upper case to drop off
Solution Approach 1:
The attachment strength is enhanced by dividing the fastening function into two separate screws. Each screw provides independent mechanical strength to secure its respective case, and together they create a distributed attachment system that is stronger than a single screw could be, while adding only minimal complexity.
Solution Approach 2:
The fastening system expands from one-dimensional single-point attachment to two-dimensional multi-point distribution. This dimensional increase creates multiple attachment vectors that work together to resist external forces, significantly improving overall attachment strength without proportionally increasing complexity.
Data Source
AI summary
A speaker box includes an upper case defining at least a first hole, a lower case connected with the upper case for forming an inner cavity and defining at least a second hole, at least an electroacoustic transducer received in the inner cavity, and at least a screw passing through the first hole and the second hole for fixing the speaker box to an external electronic device.