Sliding Display Motor-Rack Layout for Battery Space Saving
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Solution Overview
Problem
The challenge of designing electronic devices with rollable or slidable structures is the efficient disposition of a driving module, such as a rack, which requires space and can reduce battery capacity, leading to shorter usage times.
Innovation Solution
An electronic device with a driving motor and rack system where the rack is positioned to avoid overlapping with the battery, using a pinion gear and rack gear mechanism to slide housings relative to each other, and incorporating a rack guide to protect the rack from external impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the rack is positioned to avoid overlapping with the battery, then battery capacity is maximized, but the device structure becomes more complex
Solution Approach 1:
The patent positions the rack and battery in different spatial dimensions to avoid overlap. The rack is disposed in the second housing while the battery is positioned in the first housing, creating a three-dimensional arrangement that maximizes battery capacity without requiring the rack to be longer than necessary.
Solution Approach 2:
The driving motor is disposed inside the second housing, and the rack is disposed inside the first housing, creating a nested arrangement where the driving mechanism is contained within one housing while the rack extends into the other housing space.
2Length of moving object
If the rack length corresponds to the sliding distance, then the sliding function is achieved, but the device thickness increases
Solution Approach 1:
The patent employs a pinion gear and rack gear mechanism that converts rotational motion into linear sliding motion. The rack length is optimized to correspond only to the necessary sliding distance rather than the full device thickness, allowing the second housing to slide relative to the first housing without increasing overall device thickness.
3Quantity of substance
If the rack accommodation space is reduced, then battery capacity increases, but the rack becomes vulnerable to external impact
Solution Approach 1:
The patent introduces a rack guide that extends from the first housing to protect the rack from external impact. The rack guide acts as a protective structure that cushions the rack against forces applied from the outside, allowing the rack accommodation space to be minimized while maintaining rack reliability.
4Volume of moving object
If the driving module is disposed efficiently, then device slimness is achieved, but the disposition structure becomes more complex
Solution Approach 1:
The patent divides the device into two separate housings: the first housing containing the battery and rack guide, and the second housing containing the driving motor and rack. This segmentation allows each component to be optimized for its specific function while maintaining an overall slim device profile.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by disposing the rack in the first housing and the driving motor in the second housing, with the rack extending between them. This dimensional arrangement achieves device slimness by efficiently utilizing available space rather than requiring linear extension.
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 configuration allows for a slimmer electronic device design with maximized battery capacity, improving operating time and operational stability.
Implementation Method 1
a rack including a rack gear that is gear-coupled to the pinion gear
Data Source
AI summary
An electronic device is provided. The electronic device includes a first housing, a second housing slidably coupled to the first housing, a flexible display having a display area that is variable based on the second housing being slide-in or slide-out, a driving motor disposed in the second housing and including a pinion gear, a rack fixedly coupled to the first housing and including a rack gear driven by being gear-coupled to the pinion gear, and a rack guide disposed in the second housing and protecting the rack from external impact, wherein the rack guide is disposed on a side of the driving motor and spatially overlaps with a camera module, and wherein, while the pinion gear and the rack gear are being driven by being gear-coupled to each other, the second housing is configured to be driven to slide-in or slide-out based on reciprocating movement of the rack into the rack guide.