Seamless Speaker Enclosure Joints via Injection Molding
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Solution Overview
Problem
Existing media playback devices have visible seams at the joints of their enclosures, which detract from the aesthetic appeal and can compromise the structural integrity of the device.
Innovation Solution
A method for seamlessly joining sides of a speaker enclosure using a speaker grill element and a substructure element, where the elements are injection moulded together with molten plastic to form a strong, resilient joint, minimizing the appearance of a seam and enhancing the enclosure's durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional joining methods are used for speaker enclosure sides, then manufacturing is simpler, but visible seams appear at joints reducing aesthetic appeal
Solution Approach 1:
The patent combines multiple components (speaker grill element, substructure element, and enclosure side) into a single integrated assembly through injection molding. The molten plastic merges these separate elements into one unified structure, eliminating visible seams at the joints while maintaining manufacturing efficiency through a single-step molding process.
Solution Approach 2:
The invention uses composite construction by combining the speaker grill element and substructure element with the injection-molded plastic material. This composite approach creates a multi-material joint that achieves both aesthetic seamless appearance and structural integrity, resolving the contradiction between simple manufacturing and aesthetic appearance.
2Strength
If traditional joining methods are used for speaker enclosure sides, then manufacturing process is simpler, but structural integrity at joints is compromised
Solution Approach 1:
The injection molding process merges the molten plastic with the speaker grill and substructure elements, creating strong adhesive bonds and mechanical interlocking. This unified structure eliminates weak points at traditional joints, significantly enhancing structural integrity while the single-step process keeps manufacturing complexity manageable.
Solution Approach 2:
The molten plastic acts as an intermediary material that bonds the speaker grill element and substructure element to the enclosure side. This intermediary substance creates strong adhesive connections and mechanical interlocking, resolving the structural integrity issue while maintaining a relatively simple injection molding process.
3Reliability
If visible seams are present at enclosure joints, then manufacturing is easier, but acoustic performance may be affected
Solution Approach 1:
By merging the speaker grill element, substructure element, and enclosure side into a single integrated injection-molded structure, the patent eliminates gaps and discontinuities that could affect acoustic performance. The seamless joint ensures proper acoustic isolation and sound transmission paths are maintained, improving reliability while the single-step molding keeps complexity low.
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 creates a robust and aesthetically pleasing joint that reduces the visibility of seams, while maintaining the structural integrity and acoustic performance of the speaker enclosure.
Implementation Method 1
injecting molten plastic into the mold cavity to form an injection molded side element
Data Source
AI summary
A method for joining sides of a speaker enclosure includes affixing a speaker grill element to a substructure element, where the speaker grill element has a depth that is shorter than its length and width, includes a first surface and a second surface parallel to each other, and includes hole openings, where the substructure element has a depth that is shorter than its length and width, includes protrusions above its front surface, and includes openings larger than the openings in the speaker grill element, and where the speaker grill element is aligned lengthwise to a first plane, inserting the joined speaker grill element and substructure element into a mould, where in combination with portions of the speaker grill element and the substructure element, a surface of the mould forms a mould cavity, and injecting molten plastic into the mould cavity to form an injection moulded side element.