Rotary Electronic Component Sealing for Torque and PCB Soldering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Rotation-type electronic components face challenges in increasing rotation torque, achieving waterproof properties, and facilitating easy soldering of terminals to circuit boards due to structural constraints and orientation issues.
Innovation Solution
The electronic component design includes an input shaft extending through a cylindrical portion with a fitting member that fits between the shaft and the cylindrical portion, enhancing frictional forces to increase torque, blocking water entry for improved waterproofing, and stabilizing the component for easy terminal soldering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the input shaft rotates through the case structure, then the component can be mounted on the circuit board, but waterproof property deteriorates
Solution Approach 1:
A waterproof seal (grommet) is introduced as an intermediary component between the input shaft and the case opening. This seal prevents water from entering through the rotational opening while allowing the input shaft to pass through and rotate freely. The seal acts as a mediator that resolves the conflict between maintaining an open structure for shaft rotation and preventing water ingress.
2Ease of manufacture
If the input shaft extends horizontally from the electronic component main body, then the component can be mounted on the circuit board, but the electronic component main body becomes inclined making soldering difficult
Solution Approach 1:
A support plate is introduced to counterbalance the inclination caused by the horizontally extending input shaft. The support plate provides additional support to the electronic component main body, preventing it from tilting toward the input shaft side. This counterbalancing structure ensures the component remains stable and level on the circuit board, facilitating easy soldering of terminals.
3Volume of moving object
If the component size is reduced, then the component can be miniaturized for modern electronics, but rotation torque generation capability deteriorates
Solution Approach 1:
The friction material is designed with optimized parameters including thickness, width, and friction coefficient to maximize torque generation within the constrained space. By carefully selecting and adjusting these parameters, the invention achieves sufficient rotation torque in a miniaturized component. The friction material's parameters are specifically tuned to compensate for the reduced size while maintaining effective torque transmission.
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 design effectively increases rotation torque, enhances waterproofing, and simplifies terminal soldering to circuit boards, ensuring stable assembly and improved assemblability.
Implementation Method 1
a fitting member that fits to a gap between the cylindrical portion and the input shaft
Data Source
AI summary
This electronic component and electronic apparatus enable the rotational torque to be sufficiently increased, enhance the waterproofing performance, and enable easy soldering of a terminal onto a circuit board. The electronic component comprises: an electronic component body that is disposed inside a case and that is installed on the surface of a circuit board facing the inside of the case; an input shaft that passes through a cylindrical section that follows the surface from the electronic component body and is provided to the case, the input axis extending to the outside of the case; and a fitting member that fits into the gap between the cylindrical section and the input shaft. For example, the fitting member is provided with a ring-shaped section that includes: an inner edge in contact with the input shaft; and an outer edge in contact with the cylindrical section.