Rollable Display Slide Housing With Low-Friction Motor Bracket
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Solution Overview
Problem
Existing electronic devices with rollable or slidable structures face challenges in reducing thickness while maintaining stable drive motor operation and minimizing frictional resistance, leading to inefficiencies in the drive motor's performance.
Innovation Solution
The electronic device incorporates a drive motor fixed through a motor bracket with a guide structure for the gear support member, reducing thickness and incorporating a friction reduction structure between the motor bracket and gear support member to enhance stability and reduce frictional resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drive motor is fixed to the first housing through a symmetrical fixing bracket, then stable driving force is provided, but disposition efficiency of peripheral electronic components deteriorates
Solution Approach 1:
The fixing bracket is divided into a first bracket fixed to the first housing and a second bracket attached to the drive motor, replacing the single symmetrical bracket structure. This segmentation allows independent positioning of each bracket, enabling stable motor fixation while optimizing space for peripheral components like batteries and substrates.
2Device complexity
If the pinion gear and rack gear are disposed without a coupling structure, then gear coupling is achieved, but operational stability deteriorates
Solution Approach 1:
A coupling structure is introduced as an intermediary component between the pinion gear and rack gear. This coupling structure includes a first coupling part attached to the pinion gear and a second coupling part attached to the rack gear, providing stable operational support while maintaining the gear coupling function.
3Ease of operation
If surface to surface contact is used in the sliding structure, then housings can slide relative to each other, but frictional resistance increases
Solution Approach 1:
The static surface-to-surface contact is transformed into a dynamic rolling contact system. Rolling elements are introduced between the first housing and second housing, enabling the housings to slide relative to each other while significantly reducing frictional resistance through the rolling motion.
4Length of moving object
If the electronic device is made thinner, then portability is improved, but drive motor operation stability deteriorates
Solution Approach 1:
The drive motor is positioned in the thickness direction (Z-axis) rather than occupying lateral space. By fixing the motor to the first housing in the thickness direction and extending the coupling structure along the sliding direction, the design achieves thinness while maintaining motor operation stability through optimized spatial arrangement.
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 more efficient and stable operation of the drive motor, reducing thickness and minimizing efficiency losses due to friction, thereby improving the overall performance of the electronic device.
Implementation Method 1
the pinion gear and the rack gear are gear-coupled to each other
Data Source
AI summary
According to various embodiments, an electronic device may comprise: a first housing; a second housing which is slidably coupled to the first housing; a flexible display which is expanded or reduced on the basis of a slide-out or slide-in movement of the first housing; a support member which supports at least a part of the flexible display and is disposed at the rear surface of the flexible display; at least one drive motor which is disposed in the first housing, is fixed by at least one bracket, and includes a first gear; and a second gear which is disposed in the second housing and is arranged to be meshed with the first gear, wherein the first housing is configured to be slid in or slid out on the basis that the first gear and the second gear are driven in mesh with each other during driving of the drive motor.