Bone-Conducting Earphone Shell Assembly With Adhesive Gap Positioning
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Solution Overview
Problem
Earphone shell assemblies are not easily secured with adhesive, making assembly challenging.
Innovation Solution
A shell assembly with an accommodation cavity for a bone-conducting loudspeaker, featuring locating portions and a fixing adhesive to maintain a gap between the shell and loudspeaker, enhancing the fixing effect and stabilizing the loudspeaker's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is applied to secure the bone-conducting loudspeaker to the shell assembly, then the connection strength is improved, but the assembly complexity increases due to difficult adhesion
Solution Approach 1:
The patent applies preliminary action by pre-forming locating portions (protrusions and corresponding recesses) on the shell assembly and loudspeaker before assembly. These locating portions guide the relative positioning of components during assembly, ensuring proper alignment and facilitating the subsequent adhesive bonding process, thereby reducing assembly difficulty while maintaining connection strength.
Solution Approach 2:
The patent uses an intermediary approach by introducing a positioning structure (locating portions) that mediates between the shell assembly and loudspeaker. This positioning structure serves as a temporary guide during assembly, enabling precise alignment before the final adhesive bond is made, thus simplifying the assembly process while ensuring strong connection.
2Stability of the object's composition
If the bone-conducting loudspeaker is firmly fixed to the shell assembly, then the structural stability is improved, but the assembly process becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the fixing function into two distinct stages: first, the locating portions (protrusions and recesses) provide temporary positioning and alignment; second, the adhesive provides permanent bonding. This segmentation of the fixing process simplifies assembly by allowing components to be positioned correctly before final bonding, reducing overall assembly complexity while ensuring structural stability.
Solution Approach 2:
The locating portions perform preliminary positioning action before the adhesive bonding occurs. By pre-establishing the correct relative position through mechanical guidance (protrusions fitting into recesses), the assembly process becomes simpler and more controlled, while the subsequent adhesive bond ensures long-term structural stability without adding complexity.
3Reliability
If adhesive is applied to fill the gap between shell assembly and loudspeaker, then the fixing effect is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The locating portions perform preliminary positioning that pre-establishes the correct gap distance between the shell assembly and loudspeaker. By mechanically guiding the components into proper alignment before adhesive application, the system reduces the precision requirements for gap control during manufacturing, while still achieving reliable fixing through the adhesive that fills the predetermined gap.
Solution Approach 2:
The locating portions serve as an intermediary that mediates the gap between components during assembly. This mechanical guidance structure ensures consistent gap formation without requiring high manufacturing precision, while the adhesive then fills this controlled gap to provide reliable fixing, thus decoupling the precision requirements from the final fixing effect.
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 simplifies the assembly process by allowing the adhesive to flow evenly, stabilizing the loudspeaker, and rendering the structure more compact and stable.
Implementation Method 1
The fixing adhesive is filled in the predetermined gap and configured to connect the shell assembly to the bone-conducting loudspeaker
Implementation Method 2
the vibration transmission sheet is elastically connected to the voice coil assembly and the magnet assembly to elastically constrain relative movement between the voice coil assembly and the magnet assembly along the central axis direction of the bone-conducting loudspeaker
Data Source
AI summary
The present disclosure relates an earphone, comprising a shell assembly, a bone-conducting loudspeaker, and a fixing adhesive. The shell assembly is provided with an accommodation cavity. The bone-conducting loudspeaker is accommodated in the accommodation cavity. The bone-conducting loudspeaker is configured to vibrate along a central axis direction of the bone-conducting loudspeaker. The shell assembly and/or the bone-conducting loudspeaker is provided with a locating portion. The locating portion is configured to maintain a predetermined gap between an inner peripheral surface of the shell assembly and an outer peripheral surface of the bone-conducting loudspeaker along a radial direction of the bone-conducting loudspeaker. The fixing adhesive is filled in the predetermined gap and configured to connect the shell assembly to the bone-conducting loudspeaker. The present disclosure facilitates the adhesive fixation of the internal parts of the earphone and reduces the difficulty of assembling the earphone.