Earbud Bass Pipe Using Sound Guiding Wall
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Solution Overview
Problem
Current true wireless stereo earbuds have a complex bass pipe design that increases production costs and reduces yield due to the need for a separate bass pipe structure, which occupies significant internal space.
Innovation Solution
The earbud design incorporates a bass pipe formed by a sound guiding wall and a cover plate within the casing, utilizing the internal space to simplify assembly and reduce costs, while improving low-frequency sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a separate bass pipe structure is used, then the bass pipe can be provided with a certain space, but a relatively larger part of the internal space of the earbud will be occupied
Solution Approach 1:
The bass pipe structure is merged with the inner wall of the casing to form an integrated acoustic structure. The sound guiding wall is attached to the bottom surface of the rear sound cavity, and together with the inner wall of the casing, they constitute the bass pipe, eliminating the need for a separate bass pipe component.
Solution Approach 2:
The inner wall of the casing serves dual functions: it provides structural support for the earbud and simultaneously forms part of the bass pipe acoustic structure. The sound guiding wall also serves multiple purposes by guiding sound from the rear sound cavity through the bass pipe to the front sound cavity.
2Volume of moving object
If a separate bass pipe structure is used, then the bass pipe can be provided with a certain space, but the assembly process becomes fairly difficult
Solution Approach 1:
The bass pipe structure is merged with the inner wall of the casing to form an integrated acoustic structure. The sound guiding wall is attached to the bottom surface of the rear sound cavity, and together with the inner wall of the casing, they constitute the bass pipe, eliminating the need for separate bass pipe assembly.
Solution Approach 2:
The sound guiding wall is pre-attached to the bottom surface of the rear sound cavity before final assembly. This preliminary action simplifies the overall assembly process by reducing the number of components that need to be assembled during final production.
3Volume of moving object
If a separate bass pipe structure is used, then the bass pipe can be provided with a certain space, but the acoustic structure becomes complicated
Solution Approach 1:
The bass pipe structure is merged with the inner wall of the casing to form an integrated acoustic structure. The sound guiding wall is attached to the bottom surface of the rear sound cavity, and together with the inner wall of the casing, they constitute the bass pipe, simplifying the overall acoustic structure.
Solution Approach 2:
The inner wall of the casing serves dual functions: it provides structural support for the earbud and simultaneously forms part of the bass pipe acoustic structure. This multi-functionality reduces the number of dedicated acoustic components needed.
4Volume of moving object
If a separate bass pipe structure is used, then the bass pipe can be provided with a certain space, but the production cost becomes high
Solution Approach 1:
The bass pipe structure is merged with the inner wall of the casing to form an integrated acoustic structure. The sound guiding wall is attached to the bottom surface of the rear sound cavity, and together with the inner wall of the casing, they constitute the bass pipe, reducing component count and production cost.
Solution Approach 2:
The inner wall of the casing serves dual functions: it provides structural support for the earbud and simultaneously forms part of the bass pipe acoustic structure. This multi-functionality reduces the number of dedicated acoustic components needed, lowering production cost.
5Volume of moving object
If a separate bass pipe structure is used, then the bass pipe can be provided with a certain space, but the production yield becomes relatively lower
Solution Approach 1:
The bass pipe structure is merged with the inner wall of the casing to form an integrated acoustic structure. The sound guiding wall is attached to the bottom surface of the rear sound cavity, and together with the inner wall of the casing, they constitute the bass pipe, simplifying assembly and improving production yield.
Solution Approach 2:
The sound guiding wall is pre-attached to the bottom surface of the rear sound cavity before final assembly. This preliminary action simplifies the overall assembly process by reducing the number of components that need to be assembled during final production, improving production yield.
Data Source
AI summary
An earbud comprises: a casing in which a sound cavity is provided; a speaker disposed in the sound cavity and dividing the sound cavity into a front sound cavity and a rear sound cavity; and an acoustic structure located in the rear sound cavity. The acoustic structure comprises a first sound guiding wall and a cover plate, the first sound guiding wall is attached to a bottom surface of the rear sound cavity and is configured to, together with at least a part of an inner wall of the casing, constitutes a sound guiding groove, and the cover plate is mounted at an upper opening part of the sound guiding groove, such that the sound guiding groove forms a bass pipe which communicates from the rear sound cavity to at least one aperture of the casing.