Pivoting Push Rod Keyboard Switch for Smooth Press Control
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Solution Overview
Problem
Conventional push rod type keyboard switches have unsatisfactory user experience due to direct contact mode, leading to inaccurate and rough press control.
Innovation Solution
A push rod type keyboard switch design featuring a base, static contact, moving contact, upper cover, button, and reset spring, with a push rod having a press-push and slide part, and tracks on the button for smooth sliding action, allowing the push rod to slide along driving and reset tracks for precise contact engagement and easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If direct push contact mode is used between button and moving contact, then the structure is simple, but the user experience is unsatisfactory and press control is inaccurate and rough
Solution Approach 1:
The push rod is segmented into distinct functional portions: a press-push part for actuating the moving contact and a slide part for traversing the track. This segmentation allows each portion to be optimized for its specific function, improving press control accuracy while maintaining reasonable structural complexity through clear functional division.
Solution Approach 2:
The push rod acts as an intermediary mechanism between the button and the moving contact. Instead of direct contact, the push rod translates button pressure into controlled sliding motion along the track, which then actuates the moving contact. This intermediary mechanism smooths the press control action and improves accuracy.
2Ease of operation
If push rod slides along track with baffle block and driving/reset tracks, then press control becomes accurate and smooth, but assembly complexity increases
Solution Approach 1:
The driving track and reset track are merged into a single integrated track structure with a baffle block, rather than being separate components. This merging reduces the number of parts and simplifies assembly while maintaining the smooth press control function through the continuous track geometry that guides the push rod through its full cycle of motion.
3Measurement precision
If limit steps are formed between driving and reset tracks, then the push rod positioning becomes precise, but manufacturing precision requirements increase
Solution Approach 1:
The limit steps are designed to be self-forming features within the track geometry, where the push rod itself interacts with the steps to establish precise positioning. The steps work in conjunction with the push rod's dimensions to create repeatable positioning without requiring ultra-precise external fixtures or adjustment mechanisms, thereby reducing overall manufacturing precision requirements while maintaining positioning accuracy.
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
The design provides a comfortable user experience with accurate and smooth pressing control, being simple to assemble and maintain, while allowing for both sound and silent operation options.
Implementation Method 1
an upper end and a lower end of the reset spring abut against the button and the base, respectively
Data Source
AI summary
A keyboard switch, including a base; a static contact; a moving contact; an upper cover; a button configured to control the contact of the static contact and the moving contact; and a reset spring configured to control the reset of the button.