Nebulizer Aerosol Generator Contact Design for Vibration Isolation
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Solution Overview
Problem
Existing nebulizers face issues of reduced durability due to fretting wear of the contact pin head and elastic fatigue of the spring inside the contact pin head caused by long-term vibration, which is a result of the vibration transmission from the vibrating aperture plate.
Innovation Solution
The use of flexible flat cables between the electrical connector's fixed and free ends to absorb vibrations from the ceramic conducting strip and vibrating aperture plate, preventing vibration transmission to the contact pin head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the contact pin head is pressed on the vibrating aperture plate to transmit electric power, then electric power transmission is achieved, but fretting wear occurs due to long-term vibration
Solution Approach 1:
The patent introduces a flexible flat cable as an intermediary component between the fixed end of the electrical connector and the free end contact pin head. This flexible flat cable absorbs vibrations from the ceramic conducting strip and vibrating aperture plate, preventing vibration transmission to the contact pin head, thereby eliminating fretting wear while maintaining electrical power transmission
Solution Approach 2:
The patent extracts the vibration source from the electrical connection system by separating the rigid electrical connector into two parts: a fixed end welded to the ceramic conducting strip and a free end contact pin head connected via flexible flat cable. This extraction removes the harmful vibration transmission path from the contact interface
2Reliability
If the spring inside the contact pin head undergoes long-term vibration, then electrical contact is maintained, but elastic fatigue occurs
Solution Approach 1:
The flexible flat cable serves as a vibration-absorbing intermediary that isolates the spring inside the contact pin head from vibrations generated by the vibrating aperture plate and ceramic conducting strip, preventing elastic fatigue while maintaining continuous electrical contact
Solution Approach 2:
The flexible flat cable provides beforehand cushioning by absorbing vibrations before they can reach the contact pin head and spring, protecting the spring from elastic fatigue and extending its service life
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
This configuration maintains a constant contact state between the electrical connector and the contact pin head, thereby enhancing the durability of the aerosol generator by mitigating fretting wear and elastic fatigue.
Implementation Method 1
the vibration caused by the actuation of the ceramic conducting strip and the vibrating aperture plate can be absorbed by the flexible flat cables
Data Source
AI summary
An improved aerosol generator for nebulizer comprises a vibrating aperture plate, a ceramic conducting strip, an electrical connector, and a contact pin head, the vibrating aperture plate being attached above the ceramic conducting strip, the fixed end of the electrical connector being welded to the periphery of the ceramic conducting strip, the contact pin head contacting the free end of the electrical connector to transmit electric power; wherein flexible flat cables are configured between the fixed end of the electrical connector and the free end of the electrical connector, so that the vibration caused by actuation of the ceramic conducting strip and the vibrating aperture plate can be absorbed by the flexible flat cables, and will not be transmitted to the free end of the electrical connector and the contact pin head.