Rollable Display Gear Structure with Disconnect Mechanism
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Solution Overview
Problem
Electronic devices with rollable displays face damage from external impacts due to the dynamic connection between motors and gear structures, which can lead to breakage when subjected to external forces.
Innovation Solution
A gear structure design that includes a first gear portion connected with the motor, a second gear portion, a third gear portion that can be connected or disconnected, and a rack gear, allowing for the release of dynamic connection between the motor and gear structure when external impact is applied, thereby preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the motor and gear structure are dynamically connected to enable sliding movement of the first housing, then the rollable display functionality is improved, but the reliability deteriorates due to potential breakage from external impacts
Solution Approach 1:
The gear structure is designed with dynamic connection and disconnection capabilities. The third gear portion can be selectively connected to or disconnected from the second gear portion based on operational needs. During normal operation, the gears are connected to enable sliding movement. When external impact is detected or during vulnerable states, the connection can be released to prevent damage, providing dynamic adaptability between functionality and protection
Solution Approach 2:
The gear structure is divided into multiple separate gear portions (first, second, and third gear portions) that can be independently controlled. This segmentation allows the third gear portion to be disconnected from the second gear portion, creating a release mechanism that protects the motor and other critical components from impact forces while maintaining the overall gear structure integrity
2Productivity
If the gear structure components are connected to transfer driving force effectively, then the productivity is improved, but the object-affected harmful factors worsen due to vulnerability to external impact
Solution Approach 1:
The gear connection is made dynamic rather than fixed. The third gear portion can be connected to the second gear portion during normal sliding operations to ensure effective force transfer and productivity. When external impact occurs, the connection can be released to prevent damage, creating a dynamic system that adapts between performance and protection modes
Solution Approach 2:
The third gear portion acts as an intermediary element between the second gear portion and the rack gear. This intermediary can be selectively engaged or disengaged, allowing the system to maintain productive force transfer during normal operation while providing a protective disconnect mechanism during impact events, isolating the motor from harmful forces
Data Source
AI summary
An electronic device, according to various embodiments of the present disclosure, comprises: a second housing; a first housing which slidingly moves with respect to the second housing; a display which comprises a first display area and a second display area extending from the first display area, and which has at least a portion of the second display area move on the basis of the sliding movement of the first housing; a motor which is disposed in the second housing and provides a driving force for the sliding movement of the first housing; and a gear structure which transfers the driving force provided from the motor to the first housing. The gear structure comprises: a first gear unit which is connected to the motor; a second gear unit which is connected to the first gear unit; a third gear unit which is connected to or disconnected from the second gear unit; and a rack gear which is disposed in the first housing and is connected to the third gear unit.