Annular Knob-on-Display Structure With Single-Switch Click Feedback
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Solution Overview
Problem
Existing annular-shaped knob-on-display (KoD) devices face issues with unsynchronized multiple 'click' feedback responses due to multiple dome switches, increased capacitance, and higher manufacturing costs, particularly when pressure is applied away from the central dome switch.
Innovation Solution
The KoD device employs two or more actuator members connected via pivot members to a single dome switch, transferring mechanical force from the cap to the dome switch, reducing the number of dome switches and capacitance, and ensuring synchronized feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple dome switches are used in an annular-shaped KoD device, then the detection coverage is improved, but the feedback responses become unsynchronized and capacitance increases
Solution Approach 1:
The patent merges multiple dome switches into a single dome switch by introducing actuator members that distribute and concentrate force from different regions of the annular cap onto one dome switch. This consolidation eliminates the synchronization issues between multiple dome switches while maintaining comprehensive detection coverage through the actuator mechanism.
Solution Approach 2:
The actuator members serve as intermediary elements between the cap and the dome switch. These intermediaries transfer and concentrate force from various locations on the annular cap to a single dome switch, enabling unified detection coverage without the need for multiple dome switches, thereby resolving the feedback synchronization problem.
2Measurement precision
If multiple dome switches are used in an annular-shaped KoD device, then the detection coverage is improved, but the manufacturing cost increases
Solution Approach 1:
The patent reduces the number of dome switches from multiple to a single unit by using actuator members to distribute the detection function across different cap regions. This merging approach lowers manufacturing costs by reducing component count and assembly complexity while preserving comprehensive detection coverage through the mechanical force transfer mechanism.
3Ease of operation
If pressure is applied away from the central dome switch, then the operational flexibility is improved, but the feedback synchronization deteriorates
Solution Approach 1:
The actuator members act as intermediaries that transmit force from any location on the annular cap, including areas away from the center, to the single dome switch. This mechanism maintains operational flexibility by accepting pressure inputs from various positions while ensuring synchronized feedback through the unified dome switch detection point.
Solution Approach 2:
The actuator members are segmented into multiple elements that can independently respond to pressure applied at different locations on the annular cap. Each actuator segment transfers its detected force to the central dome switch, enabling flexible operation across the entire cap surface while maintaining synchronized feedback through the single dome switch.
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 provides uniform single mechanical click feedback, reduces capacitance, and lowers manufacturing costs by using a single dome switch with actuator members, enhancing user satisfaction and cost-effectiveness.
Implementation Method 1
two or more actuator members connected via pivot members to a single dome switch, transferring mechanical force from the cap to the dome switch
Data Source
AI summary
Annular knob-on-display (KoD) devices and related apparatuses. An apparatus includes a frame having substantially annular shape, a dome switch, a plurality of actuator members, and a plurality of pivot members. Respective pivot members of the plurality of pivot members secures an actuator member of the plurality of actuator members to the frame and transfers force applied to the actuator member to the dome switch.