Tactile Input Device Superposed Securement Mechanism
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Solution Overview
Problem
Tactile input devices in portable computing devices face challenges in maximizing the surface area for user input due to the space occupied by attachment mechanisms, which limits their size and user experience.
Innovation Solution
The tactile input device design incorporates a top surface with a sensor and controller beneath it, along with a securement mechanism that is superposed by the top surface, allowing for a reduction in the area occupied by components and enabling the top surface to extend closer to the keyboard and front end of the device, thereby increasing the input surface area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If traditional attachment mechanisms are used to secure the tactile input device, then the device can be firmly attached to the portable computing device, but the area occupied by components under the top surface increases, reducing the input surface area
Solution Approach 1:
The securement mechanism is moved from a planar arrangement under the top surface to a three-dimensional arrangement where components are stacked vertically. The top surface superposes the sensor, controller, and securement mechanism, allowing these components to occupy the same horizontal footprint while being arranged at different vertical levels, thus maximizing the input surface area without compromising attachment functionality
Solution Approach 2:
The controller is positioned within the space defined by the top surface and the securement mechanism, creating a nested arrangement where multiple components occupy overlapping horizontal spaces at different vertical levels. This nesting allows the sensor, controller, and securement mechanism to share the same horizontal footprint, maximizing the input surface area
2Area of stationary object
If the top surface is extended closer to the keyboard and front end, then the input surface area increases, but the distance to the keyboard and front end becomes very small, making integration challenging
Solution Approach 1:
The design transitions from a two-dimensional planar layout to a three-dimensional stacked arrangement, allowing the top surface to extend close to the keyboard and front end while maintaining proper spacing through vertical arrangement of components. This dimensional change enables tight integration without compromising manufacturability
3Area of stationary object
If the tactile input device is installed from the top side, then the securement mechanism can be superposed by the top surface, but the installation process becomes more complex
Solution Approach 1:
The controller is pre-positioned within the space defined by the top surface and securement mechanism before final assembly. This preliminary positioning of the controller within the available vertical space simplifies the overall assembly process by pre-establishing the spatial relationships between components
Solution Approach 2:
The nested arrangement of components allows for a simplified top-down assembly process where the controller is inserted into the space defined by the top surface and securement mechanism, and subsequent components are layered on top, reducing the overall installation complexity despite the three-dimensional arrangement
Data Source
AI summary
A tactile input device may include a top surface, a sensor beneath the top surface, a controller beneath the top surface, and a securement mechanism. The controller may be configured to process input received by the sensor. The securement mechanism may be configured to secure the tactile input device to a portable computing device. The sensor, the controller, and the securement mechanism may all be superposed by the top surface.