Hinging Interconnector Trackball Mounting for Clamshell Devices
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Solution Overview
Problem
The compact size of modern handheld communication devices limits the available surface area for both keyboards and navigation tools, leading to inefficiencies in user interaction, particularly when navigation devices like trackballs occupy space that could be used for keyboard keys, hindering efficient data entry and cursor control.
Innovation Solution
A clamshell handheld wireless communication device design featuring a hinging interconnector that allows for a trackball assembly to be mounted between the two housings, keeping the navigation tool above the keyboard and below the display, thus avoiding interference and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a navigation device like a trackball is placed on the front surface of the device, then navigation control is improved, but the available space for keyboard keys is reduced
Solution Approach 1:
The trackball navigation device is relocated from the traditional front surface (2D plane) to the hinging interconnector area, utilizing the third dimension (depth/thickness) of the device structure. This allows the trackball to be positioned in a location that does not compete for surface area with the keyboard, effectively resolving the space conflict between navigation and input functions.
2Length of moving object
If the device size is reduced to fit in pocket or palm, then portability is improved, but the available space for both keyboard and navigation device is reduced
Solution Approach 1:
By utilizing the hinging interconnector space (a third-dimensional location between the two housings), the design accommodates the trackball without increasing the device's footprint. This allows compact device dimensions to be maintained while still providing adequate space for both keyboard and navigation functions.
Solution Approach 2:
The trackball assembly is nested within the hinging interconnector structure, utilizing the internal space between the front and back housings. This nesting approach allows the navigation device to be housed within the overall device structure without adding to external dimensions, preserving both compact size and functional space.
3Area of stationary object
If the keyboard and navigation device are placed proximately to one another, then space utilization is improved, but the navigation device may obstruct the view of the display
Solution Approach 1:
The trackball is positioned in the hinging interconnector area, which is spatially separated from both the display and keyboard planes. This three-dimensional positioning ensures that the navigation device does not obstruct the display view while still maintaining efficient space utilization within the overall device structure.
Data Source
AI summary
A clamshell handheld wireless communication device having a hinging interconnector between the two housings, one in which the display screen is located and the other upon which the keyboard is located. The hinging interconnector is positioned between the two housings and navigation tool is located on the hinging interconnector.