Power Toothbrush Brushhead Elastic Vibration Transmission

The patent employs a dynamic connection mechanism where the drive rod can elastically deform to accommodate vibration forces. The connection structure includes flexible elements that allow controlled movement and absorption of vibration energy, enabling stable vibration transmission without requiring complex rigid constraints. This dynamic approach resolves the contradiction by maintaining reliability through adaptability rather than through structural complexity.

The patent introduces an intermediate connection structure between the drive rod and brushhead that acts as a mediator for vibration transmission. This intermediate structure includes specific geometric features and material properties that optimize the transfer of vibrational energy while filtering out harmful forces. The intermediary mechanism enables effective vibration transmission with a relatively simple overall structure, resolving the contradiction between simplicity and reliability.

The patent designs the connection interface between brushhead and handle to achieve equipotential distribution of forces during vibration. The geometric configuration of the connection features ensures that vibrational forces are evenly distributed across the attachment interface, preventing localized stress concentrations that could lead to detachment. This equipotential design provides secure attachment without requiring overly complex multi-point connection mechanisms.

The patent utilizes parameter optimization in the connection structure, specifically in the geometry of the drive rod and its interaction surfaces. By carefully selecting dimensions, angles, and material properties of the connection components, the patent achieves reliable brushhead attachment with a relatively simple structure. The parameter-optimized connection features provide adequate securing force while maintaining manufacturing simplicity.

The patent incorporates specific vibrational characteristics into the brushhead design, including resonant frequency optimization and vibration mode shaping. The simplified brushhead structure is designed with geometric features that promote efficient vibration transmission at optimal frequencies, reducing energy loss and minimizing noise generation. This vibration-optimized simple structure achieves low noise operation without requiring complex multi-component assemblies.

The patent applies local quality optimization to specific regions of the brushhead rather than requiring overall structural complexity. Critical areas such as the connection interface and bristle support zones are locally reinforced or geometrically optimized to ensure efficient vibration transmission, while other areas maintain simple geometries for ease of manufacture. This localized optimization reduces noise without increasing overall manufacturing complexity.