Rollable Display Sliding Drive Structure for Battery Space and Low Vibration
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Solution Overview
Problem
Electronic devices with rollable displays face challenges in securing sufficient mounting space for large or high-capacity batteries due to the compact nature of the device and the need for a driving structure that minimizes noise and vibration during sliding operations.
Innovation Solution
The electronic device incorporates a driving structure that includes a motor in the first housing, a pinion gear, a rack with a guide groove in the second housing, and a gear bracket to support the guide groove. This configuration allows for a sliding movement of the second housing relative to the first housing, while also downsizing the rack to secure more space for the battery and reducing noise and vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a driving structure with motor and gear structure is provided inside the housing to implement sliding operation, then the sliding operation is achieved, but the mounting space for battery inside the housing is insufficient
Solution Approach 1:
The housing is divided into a first housing and a second housing that can slide relative to each other. The driving structure is specifically positioned within the second housing, segmenting the space allocation and allowing the battery to be primarily mounted in the first housing, thus resolving the space conflict.
Solution Approach 2:
The rack is designed with a guide groove that extends in the sliding direction, allowing the pinion gear to engage and drive the rack along this dimension. This dimensional arrangement optimizes the driving structure's footprint, freeing up vertical and lateral space for battery mounting.
2Ease of operation
If a driving structure with motor and gear structure is provided inside the housing to implement sliding operation, then the sliding operation is achieved, but noise and vibration increase
Solution Approach 1:
A damping member is introduced as an intermediary element between the rack and the second housing. This damping member absorbs and reduces the vibration and noise generated during sliding operation, while still allowing the rack to move smoothly along the guide groove.
Solution Approach 2:
The damping member is configured to contact the rack and is made of materials with damping properties. This composite approach combines the structural rigidity of the rack with the vibration-absorbing characteristics of the damping material, reducing harmful noise and vibration.
3Volume of moving object
If the rack is downsized to secure more battery space, then the mounting space for battery is increased, but the stability of sliding operation may be compromised
Solution Approach 1:
The guide groove is designed to extend in the sliding direction, providing guidance and stability along the length of the rack. This dimensional extension compensates for the reduced cross-sectional size of the rack, maintaining sliding stability while minimizing space occupation.
Solution Approach 2:
The damping member serves as an intermediary that contacts the rack during sliding operation. This member provides additional support and stability to the downsized rack, ensuring smooth and stable sliding while allowing the rack to maintain a compact profile for battery space optimization.
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 solution effectively secures a mounting space for a battery within the electronic device, reduces noise and vibration during sliding operations, and maintains the compact design of the device.
Implementation Method 1
a pinion gear connected to the motor and configured to rotate in one direction or in a second direction opposite to the one direction based on a driving force of the motor, a rack disposed in the second housing, configured to be engaged with the pinion gear
Data Source
AI summary
According to various embodiments of the present disclosure, an electronic device may comprise: a first housing; a second housing configured to slide with respect to the first housing; a rollable display including a first display area and a second display area extending from the first display area, wherein at least a part of the second display area is configured to be moved based on a sliding movement of the second housing; and a driving structure configured to provide driving power for the sliding of the second housing with respect to the first housing, wherein the driving structure comprises: a motor disposed in the first housing; a pinion gear connected to the motor and configured to be rotated in one direction or in the other direction opposite to the one direction based on the driving power of the motor; a rack disposed in the second housing, configured to be meshed with the pinion gear, and including a guide groove; and a gear bracket coupled to one side of the motor and including a guide groove support configured to support the guide groove of the rack.