Portable Terminal Battery Placement for Center of Gravity
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Solution Overview
Problem
Tablet PCs with batteries disposed at the end portion face issues with center of gravity shifting and operational components being hidden when held in vertical or horizontal orientations, leading to user burden and decreased operability.
Innovation Solution
A portable terminal design with a battery accommodated in a central merged region and a circuit board along the periphery, divided into matrix regions for optimal weight distribution and component placement, ensuring the battery's center is closer to the device's center of gravity and operational components are not obstructed by the user's hand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the battery is disposed at the end portion of the main body, then the battery can be easily accommodated in the device, but the center of gravity shifts to the side that is not held, causing user burden when holding the device for a long period
Solution Approach 1:
The battery is disposed asymmetrically within the main body, specifically in a region that is not at the extreme end but rather in a position that balances with the circuit board placement. This asymmetric arrangement optimizes the center of gravity position to reduce user burden during prolonged holding, while still accommodating the battery effectively within the device structure.
2Ease of manufacture
If the battery is disposed at the end portion of the main body, then the battery can be easily accommodated in the device, but the operation portion may be hidden by the user's hand when holding the device
Solution Approach 1:
The asymmetric battery placement, combined with strategic positioning of the circuit board, ensures that operational components remain accessible and are not obscured by the user's hand during normal device holding. This arrangement preserves full operability while accommodating the battery within the device.
3Ease of manufacture
If the battery is disposed at the end portion of the main body, then the battery can be easily accommodated in the device, but the center of gravity becomes unstable when the device is held in vertical or horizontal orientations
Solution Approach 1:
The asymmetric arrangement of the battery and circuit board is specifically designed to achieve stable center of gravity positioning that remains effective across multiple device orientations (vertical and horizontal). This asymmetric configuration prevents the center of gravity from shifting to the side that is not held, ensuring stability regardless of how the device is oriented during use.
Data Source
AI summary
A portable terminal includes a main body having a rectangular shape in a plan view and having a display on a surface, a battery housed in the main body, and a circuit board. As viewed from the back, the main body is divided into areas consisting of a matrix of 25 divisions. The battery is housed in a first integrated area, and the center of the battery is located in the 13th area as viewed from the back. The circuit board is disposed along the perimeter of the battery as viewed through the back, and an option component is removably attached to an option area.