Transversely Moveable Keyboard Board With Scissors Bridge
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Solution Overview
Problem
Existing keyboards suffer from bulky key designs due to stems, leading to deflection over time, which results in incorrect key press signals as the key cap may tilt obliquely, preventing accurate signal generation upon pressing.
Innovation Solution
A keyboard design featuring transversely moveable boards with a film circuit board, resilient dome, and scissors-type bridge structures that allow for increased key stroke by pivoting the peg from the key cap through elongated openings on the base board, enabling precise key press signal generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a stem is provided under the key, then the key structure is complete and functional, but the keys become bulky rather than compact and thin
Solution Approach 1:
The patent removes the traditional stem component from the key structure. Instead of having a stem under the key cap, the invention uses a scissor-type bridge structure that connects the key cap directly to the base board through pivot points, eliminating the need for a separate stem while maintaining structural integrity and signal transmission capability.
Solution Approach 2:
The patent introduces a dynamic scissor-type bridge structure with pivot points that allows the key cap to move in a controlled arc during pressing. This dynamic mechanism replaces the static stem structure, enabling the key cap to maintain proper alignment while providing the necessary key stroke movement, thus preventing oblique deflection.
2Ease of operation
If a stem is provided under the key, then the key structure is complete, but the key cap may deflect obliquely after prolonged use, preventing correct key press signal generation
Solution Approach 1:
The scissor-type bridge structure with pivot points creates a dynamic mechanism that guides the key cap movement along a precise arc. This ensures that during pressing, the key cap maintains proper alignment and does not deflect obliquely, guaranteeing accurate key press signal generation throughout the keyboard's operational life.
Solution Approach 2:
The resilient dome positioned at the bottom of the scissor mechanism provides pre-compliance and cushioning. When the key cap is pressed, the resilient dome absorbs excess force and ensures smooth, controlled movement, preventing sudden oblique deflections that could lead to incorrect signal generation.
3Volume of moving object
If the key structure is simplified without a stem, then the keys become compact and thin, but the key stroke length needs to be increased to maintain functionality
Solution Approach 1:
The scissor-type bridge structure transforms the linear key stroke movement into a rotational arc movement around pivot points. This dimensional change allows the key cap to achieve greater effective stroke length through the arc of rotation while maintaining a compact overall key structure, effectively increasing the key stroke without increasing the key's volume.
Solution Approach 2:
The scissor-type bridge structure serves multiple functions simultaneously: it acts as the structural support replacing the stem, provides the key stroke movement through its arc motion, and ensures proper key cap alignment through its geometric constraints. This multi-functionality allows the compact key structure to achieve extended effective key stroke length without adding bulk.
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 enhances key stroke length and maintains key cap alignment, ensuring accurate key press signals are generated, addressing the issue of bulkiness and deflection in prior keyboard technologies.
Implementation Method 1
a resilient dome on the film circuit board
Data Source
AI summary
A keyboard includes a base board; transversely moveable boards, each moveably provided on the base board and including a film circuit board, a resilient dome on the film circuit board, a hole member on the film circuit board and adjacent to the resilient dome, openings on the film circuit board, a hollow structure in the film circuit board and directly under the resilient dome, a top contact in the hollow structure, and a bottom contact in the hollow structure and spaced from the top contact; key caps; and scissors-type bridge structures, each including a first frame member, a hollow, rectangular second frame member, and a peg extending out of the first frame member. Top of the scissors-type bridge structure is pivotably secured to the key cap. Bottom of the scissors-type bridge structure is pivotably secured to the base board by inserting through the holes onto the base board.