Keyboard Frame Rib and Contact Structure for Substrate Positioning
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Solution Overview
Problem
The positioning accuracy of the switch substrate with respect to the front and back direction is compromised when it is arranged on a frame made from synthetic resin in existing keyboard apparatus configurations.
Innovation Solution
The keyboard apparatus incorporates a frame design with specific contacting and rib structures that enhance the positioning accuracy of the circuit substrate, utilizing a first and second contacting portion and a rib arrangement to securely fix the substrate in place, ensuring precise alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the switch substrate is arranged on the frame made from synthetic resin, then the keyboard apparatus can be manufactured with simple structure, but the positioning accuracy of the switch substrate with respect to the front and back direction lowers
Solution Approach 1:
The frame is segmented into multiple functional portions: a substrate supporting portion for holding the switch substrate, a substrate fixing portion with protrusions for securing the substrate edges, and a rib structure for reinforcement. This segmentation allows each portion to be optimized for its specific function while maintaining overall manufacturing simplicity.
Solution Approach 2:
The substrate fixing portion acts as an intermediary mechanism between the frame and the switch substrate. The protrusions in the substrate fixing portion engage with corresponding recesses or edges of the switch substrate, providing precise positioning and secure attachment without requiring complex fastening systems.
2Device complexity
If the switch substrate is arranged on the frame made from synthetic resin, then the device complexity is reduced, but the positioning accuracy of the switch substrate with respect to the front and back direction deteriorates
Solution Approach 1:
The substrate supporting portion and substrate fixing portion are merged into a single integrated frame structure made from synthetic resin. This merging eliminates the need for separate mounting brackets or fastening components, reducing device complexity while maintaining positioning accuracy through the built-in fixing protrusions.
Solution Approach 2:
The frame exhibits local quality variations where the substrate fixing portion contains strategically positioned protrusions with enhanced rigidity and precision features. These localized structural enhancements provide accurate positioning without requiring the entire frame to be overly complex or rigid.
Data Source
AI summary
A keyboard apparatus includes a frame including a first contacting portion, a second contacting portion, and a first rib, a first member having a first side and a second side opposite to the first side and being attached to the frame, and a plurality of keys being attached to the frame, the first contacting portion being in contact with the first member from the first side, the second contacting portion being in contact with the first member from the second side, the first rib having longitudinal shape in a first direction, and the first contacting portion in the first direction with respect to the first rib.