Push-button switch independent plungers for contact reliability
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Solution Overview
Problem
Ensuring the positional accuracy of the lock lever, cam, holder, and contact B in operation switches is challenging, affecting contact reliability, particularly with carbonaceous members.
Innovation Solution
A push-button switch design featuring a housing with a plunger and operation unit, a lock lever unit, transmission mechanism, contact mechanism, and biasing portion, where the plunger has independent first and second plungers, allowing the movable contact portion to reliably contact and separate from the fixed contact portion without relying on the positional accuracy of the lock lever unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single holder positions both the lock lever and contact B, then the structure is simplified, but it becomes difficult to simultaneously ensure the positional accuracy of all members
Solution Approach 1:
The holder is divided into a first holder for positioning the lock lever and a second holder for positioning the contact B. This segmentation allows each holder to be independently positioned with high precision, resolving the contradiction between structural simplicity and manufacturing precision.
2Reliability
If multiple components (lock lever, cam, holder, contact B) require precise alignment, then contact reliability is ensured, but the manufacturing and assembly difficulty increases
Solution Approach 1:
By dividing the holder into separate first and second holders, each responsible for positioning specific components, the patent reduces the complexity of simultaneous alignment. The first holder positions the lock lever and cam, while the second holder positions the contact B, making assembly more manageable while maintaining contact reliability.
3Adaptability or versatility
If the plunger is positioned by the lock lever unit through the transmission mechanism, then the lock function is integrated, but the contact reliability becomes dependent on the positional accuracy of multiple components
Solution Approach 1:
The patent separates the positioning function into two independent holders: the first holder ensures accurate positioning of the lock lever unit, and the second holder ensures accurate positioning of the contact B. This segmentation decouples the contact reliability from the positional accuracy requirements of the lock lever unit, allowing the plunger to be positioned by the transmission mechanism while maintaining reliable contact.
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 ensures contact reliability by focusing on the positional accuracy of the second plunger and contact mechanism, simplifying the process and improving reliability compared to existing switches that require precise alignment of multiple components.
Implementation Method 1
a biasing portion provided at the inside of the housing portion and biasing the plunger from the return position toward the operating position along the movable direction
Data Source
AI summary
A push-button switch may include a housing, a plunger, an operation unit, a transmission mechanism, a contact mechanism, and a biasing portion. The plunger may have a first plunger that is disposed in series with the first plunger. The first plunger and the second plunger may be movable independently of each other. The contact mechanism may be configured to be opened/closed by movement of the second plunger.