Single-Piece Plastic Speaker Shell with Metal Frame

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Solution Overview

Problem

Existing acoustic speakers with large loudspeakers have visible assembly traces, such as joints, which detract from the smooth appearance of compact speakers.

Innovation Solution

The acoustic speaker design features a metallic reinforcement with a plastic shell that encloses two loudspeakers arranged head-to-head across openings in the shell, with a single screw system for assembly that minimizes visible joints.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If speakers are fixed to separate portions of the shell and assembled together, then the structural integrity and ease of assembly are improved, but visible assembly marks and joints appear on the shell surface

Engineering Contradiction:

Improveease of assemblyVSAvoidappearance smoothness

Core Design Contradiction:

Ease of manufactureVSShape

Solution Approach 1:

The patent merges separate shell portions into a single-piece shell structure. The loudspeakers are fixed directly to this unified shell without assembly joints, eliminating visible assembly marks while maintaining ease of manufacturing through the integrated design.

Inventive Principle:

Principle #5Merging (Combining)

2Shape

If a single-piece shell is used, then the appearance smoothness and aesthetic quality are improved, but the ease of assembly and structural integrity are worsened

Engineering Contradiction:

Improveappearance smoothnessVSAvoidease of assembly

Core Design Contradiction:

ShapeVSEase of manufacture

Solution Approach 1:

The patent segments the single-piece shell into manageable portions for manufacturing, then uses a joining mechanism that preserves the appearance of a unified structure. The internal reinforcement element facilitates assembly while the external surface remains smooth and joint-free.

Inventive Principle:

Principle #1Segmentation

3Stability of the object's composition

If loudspeakers are arranged head to tail along a transverse axis, then the vibration control and structural stability are improved, but the shell requires separate portions and assembly joints

Engineering Contradiction:

Improvevibration controlVSAvoidappearance smoothness

Core Design Contradiction:

Stability of the object's compositionVSShape

Solution Approach 1:

The patent combines the vibration control function with a unified shell design. The loudspeakers arranged head to tail are integrated into a single-piece shell that maintains structural stability while eliminating assembly joints, achieving both vibration control and aesthetic appearance.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP3637787B1Speaker system comprising a single-piece shell made of plastic material

Publication Date: 2025.04.16 DEVIALET

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AI summary

An acoustic enclosure (1) comprising: - a metal frame (7), - a plastic shell (9) fixed to the frame, the shell defining at least two openings (11A, 11B), and - at least two loudspeakers (13A, 13B) arranged end-to-end along a transverse axis (T), the two loudspeakers extending respectively across the two openings. The shell is a single piece, and the shell and an external portion (19) of the frame are adapted to fit together along a longitudinal axis (L), the external portion and the shell defining at least part of an internal volume (23) of the acoustic enclosure.