Body-Integrated PCB Assembly for Low-Noise Light-Emitting Toothbrushes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electric toothbrushes with separate PCBs for light, vibration motor, and battery increase costs, manufacturing complexity, noise, and vibration instability.
Innovation Solution
A single-piece PCB is directly assembled into the main body of the toothbrush, integrating the vibration motor and light sources, reducing noise and improving vibration stability while simplifying assembly and manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single PCB integrates the vibration motor and light sources, then device complexity and manufacturing cost are reduced, but manufacturing precision and assembly difficulty increase
Solution Approach 1:
The patent combines the vibration motor, light sources, and control circuits onto a single PCB, eliminating the need for multiple separate PCBs and reducing overall device complexity. This integration simplifies the structural design and reduces the number of assembly steps required.
Solution Approach 2:
The patent introduces a dedicated vibration motor mounting structure on the PCB that serves as an intermediary component. This structure provides precise positioning and secure attachment for the vibration motor, thereby maintaining manufacturing precision despite the integration of multiple components onto a single board.
2Productivity
If the vibration motor is attached to the PCB, then assembly efficiency is improved, but noise and vibration instability increase
Solution Approach 1:
The vibration motor is directly mounted on the PCB, merging the motor attachment function with the circuit board structure. This eliminates separate mounting brackets and reduces the number of assembly steps, thereby improving assembly efficiency and productivity.
Solution Approach 2:
The patent designs the PCB with integrated vibration isolation features that convert the potentially harmful vibrations and noise into controlled mechanical damping. The PCB structure itself acts as a vibration absorber, reducing noise transmission while maintaining the benefits of direct motor attachment.
3Ease of manufacture
If the PCB is directly assembled into the main body, then manufacturing cost and assembly steps are reduced, but reliability and durability may be compromised
Solution Approach 1:
The PCB is directly assembled into the main body housing, merging the circuit board mounting function with the housing structure. This eliminates separate mounting brackets and reduces the number of assembly steps, simplifying the manufacturing process and reducing assembly costs.
Solution Approach 2:
The patent incorporates shock-absorbing features and stress-distribution designs into the PCB and housing interface during the design phase. These beforehand cushioning measures prevent stress concentration and potential failure points, thereby maintaining device reliability and durability despite the direct assembly approach.
Data Source
AI summary
The present invention relates to a light irradiation hygiene device with a PCB directly assembled into the main body. The device includes a main body housing the handle and head sections, a PCB configured to match the main body's shape, a power button in the handle section, a light irradiation unit with multiple light sources, a vibration motor attached via soldering, and a toothbrush head plate. The structure reduces noise and improves vibration stability, increasing convenience for users. The one-piece structure of the PCB enhances cost competitiveness, assembly efficiency, and durability, while minimizing failure points due to the removal of connecting parts. Attaching the vibration motor to the PCB, which matches the main body's shape, reduces the number of vibrating parts, decreasing noise, and simplifying the manufacturing process, leading to cost reduction and improved productivity.