Rack Gear Heat Dissipation in Rollable Display Sliding Mechanisms
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Solution Overview
Problem
There is a challenge in designing rollable electronic devices that balance display size with compactness, as they require efficient heat dissipation while maintaining portability, and existing solutions struggle to integrate heat dissipation structures with sliding mechanisms.
Innovation Solution
The electronic device incorporates a rack gear with a first part made of a rigid material and a second part made of a high thermal conductivity material, which meshes with a pinion gear to dissipate heat generated by a motor structure, using a lubricating material and a heat dissipation member to enhance thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display size is increased to provide sufficient multimedia service area, then the display area is improved, but the device compactness deteriorates
Solution Approach 1:
The patent implements a slidable housing structure where the first housing can move relative to the second housing along a sliding direction. This dynamic configuration allows the display area to be expanded when needed while maintaining a compact form factor when the housing is in the retracted position, thus resolving the contradiction between display size and device compactness.
2Temperature
If heat dissipation structures are integrated into the sliding mechanism, then heat dissipation efficiency is improved, but the structural complexity deteriorates
Solution Approach 1:
The housing structure serves multiple functions: it provides the sliding mechanism for display expansion and simultaneously acts as a heat dissipation structure. The first housing, which slides relative to the second housing, also functions as a heat dissipation member that transfers heat from the motor structure, thereby integrating mechanical and thermal management functions without increasing structural complexity.
Solution Approach 2:
The patent merges the sliding mechanism and heat dissipation structure into a single integrated housing system. The first housing both enables display expansion through sliding and dissipates heat from the motor structure, combining two separate functional requirements into one unified structure that reduces overall device complexity.
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 effectively dissipates heat from the motor structure, ensuring the device's performance and compactness, while allowing the display to unfold and slide, addressing the trade-off between display size and portability.
Implementation Method 1
a pinion gear configured to rotate based on the driving power generated by the motor structure, and a rack gear disposed in the housing and configured to mesh with the pinion gear
Implementation Method 2
a second part made of a second material having second thermal conductivity higher than the first thermal conductivity, the second part including a lower area disposed below the first part
Data Source
AI summary
An electronic device is provided. The electronic device includes a housing including a first housing and a second housing configured to contain at least a part of the first housing and to move relative to the first housing, a display configured to unfold based on sliding of the first housing, a motor structure disposed in the housing and configured to generate driving power for sliding of the first housing, a pinion gear configured to rotate based on the driving power generated by the motor structure, and a rack gear disposed in the housing and configured to mesh with the pinion gear. The rack gear includes a first part made of a first material, the first part including at least one recess, and a second part including a lower area disposed below the first part, at least a part of the second part being contained in the at least one recess.