Switch-Type Key Structure With Connection Element for Even Stress Distribution
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Solution Overview
Problem
Conventional switch-type keys experience uneven stress distribution and wobble due to the key cap being unsupported, leading to a short lifespan and unpleasant tactile sensation during typing.
Innovation Solution
An improved switch-type key structure featuring a support plate, microswitch, and connection element with a balance portion and support portions, where the key cap is securely attached to the connection element, which is movably disposed on the support plate, ensuring even stress distribution and preventing vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the key cap is only supported by the microswitch, then the structure is simple, but the stress distribution is uneven and the key cap wobbles
Solution Approach 1:
The support function is segmented from the microswitch alone to a distributed system involving the support plate and connection element with support portions. The connection element divides the support function into multiple contact points (support portions) that distribute the load from the key cap across several locations on the support plate, achieving uniform stress distribution while maintaining structural simplicity.
2Device complexity
If the key cap is only supported by the microswitch, then the structure is simple, but the key cap is prone to detachment
Solution Approach 1:
The connection element merges multiple functions into a single component: it provides support through support portions, enables movement through the balance portion, and secures the key cap through the hook engagement with the support plate. This integration of support, movement, and attachment functions into one element increases reliability without significantly increasing overall structural complexity.
3Device complexity
If the key cap is unsupported, then the structure is simple, but the key cap vibrates when typed
Solution Approach 1:
The balance portion of the connection element acts as a counterweight mechanism that stabilizes the key cap during actuation. When the key cap is pressed, the balance portion provides a counterbalancing effect that reduces vibrations and wobbles, improving tactile sensation quality while maintaining a simple overall structure.
Data Source
AI summary
An improved switch-type key structure includes a support plate, a microswitch, a connection element, and a key cap. The microswitch is fixed onto the support plate and is electrically connected thereto. The connection element is movably disposed on the support plate. The connection element includes a balance portion and a support portion extending downward from the balance portion. The key cap is disposed on the balance portion. The connection element is disposed between the support plate and the key cap through the microswitch, a hook hole corresponding to the support portion is disposed on the support plate, a hook is disposed at a distal end of the support portion, and the hook passes through the hook hole to engage the connection element with the support plate. Accordingly, the key cap is stressed evenly, returns instantly after being depressed, and is prevented from vibrations/wobbles.