Rollable Display Motor Bracket Layout for Stable Low-Friction Sliding
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Solution Overview
Problem
Existing electronic devices with rollable or slidable structures face issues with drive motor disposition that deteriorate peripheral component efficiency and stability due to symmetrical fixing brackets and surface-to-surface friction, leading to increased frictional resistance and operation instability.
Innovation Solution
A fixed drive motor disposition structure using a motor bracket at the side surface of a bracket housing, combined with a guide structure for gear support members and a friction reduction mechanism, to stabilize operation and reduce frictional resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drive motor is fixed using symmetrical fixing brackets in a rollable electronic device, then the motor can be securely mounted, but the disposition efficiency of peripheral electronic components deteriorates and the device thickness increases
Solution Approach 1:
The patent replaces symmetrical fixing brackets with an asymmetrical motor bracket configuration where the drive motor is fixed at the side surface of the bracket housing. This asymmetrical arrangement optimizes space utilization and improves the disposition efficiency of peripheral electronic components while maintaining secure motor fixation.
Solution Approach 2:
The drive motor is repositioned from a conventional central or top-mounted location to the side surface of the bracket housing. This dimensional relocation allows for better component arrangement and reduces the overall device thickness while preserving fixation reliability.
2Device complexity
If surface-to-surface contact is used between sliding components, then the structure is simple, but frictional resistance increases and operation stability deteriorates
Solution Approach 1:
The patent introduces a guide structure as an intermediary element between sliding components. This guide structure includes guide surfaces that constrain the motion of the gear support member, reducing frictional resistance and improving operation stability while maintaining structural simplicity.
Solution Approach 2:
The patent modifies the contact parameters between sliding surfaces by introducing guided motion paths and optimized contact geometries. This changes the nature of the surface interaction from direct surface-to-surface contact to guided contact with reduced friction, thereby improving operational reliability.
3Length of stationary object
If the drive motor is disposed inside the housing without external mounting, then the device thickness is reduced, but the motor stability and efficiency deteriorate due to increased friction
Solution Approach 1:
The guide structure acts as a mediator between the internally mounted drive motor and the sliding components. It reduces frictional resistance through guided motion, thereby minimizing energy loss and maintaining motor efficiency while allowing compact internal motor disposition that reduces device thickness.
Solution Approach 2:
The patent replaces high-friction surface-to-surface mechanical contact with a guided mechanical system that has optimized contact characteristics. This substitution reduces energy loss while maintaining the compact internal motor mounting necessary for thin device profile.
Data Source
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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.