Hinge Mechanism Torsion Control for Foldable Devices
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Solution Overview
Problem
Current hinge mechanisms in foldable electronic devices either cause the device body to lift up when the screen is opened due to excessive torsion or result in the screen automatically falling and potentially being damaged when the torsion is set too low for closure.
Innovation Solution
A hinge mechanism with a pivot part and a friction part that adjusts torsion based on the device's operational state, providing sufficient torsion for opening while increasing friction for closure to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the torsion of the hinge mechanism is set to be huge, then the screen can be opened easily, but the body is lifted up when the screen is opened
Solution Approach 1:
The hinge mechanism employs a dynamic torsion adjustment system where the torsion force is not fixed but varies based on the screen's opening angle. The mechanism includes a torsion spring and an adjustable component that allows the torsion force to be modified during operation, enabling easy screen opening while preventing body lifting through controlled force variation.
Solution Approach 2:
The invention changes the torsion parameter dynamically by incorporating an adjustable mechanism that modifies the torsion spring's force characteristics. This allows the system to provide high torsion for initial screen opening and then reduce torsion to prevent body lifting, effectively resolving the contradiction between ease of operation and harmful body lifting.
2Object-generated harmful factors
If the torsion of the hinge mechanism is set to be relatively smaller, then the body is not lifted up when the screen is opened, but the screen automatically falls down when closed
Solution Approach 1:
The dynamic torsion adjustment mechanism enables the hinge to provide different torsion levels at different operational phases. During closing, the mechanism maintains sufficient torsion to support the screen and prevent automatic falling, while during opening, it adjusts to provide only enough force to lift the screen without causing body elevation.
Solution Approach 2:
The invention modifies the torsion parameter based on the screen's position and operational state. By incorporating an adjustable torsion mechanism, the system can increase torsion force when the screen is closing to ensure stability and prevent damage, while reducing torsion during opening operations to avoid body lifting.
3Reliability
If the torsion is increased to support the screen when closed, then the screen does not fall down, but the user needs to use both hands to rotate the screen open
Solution Approach 1:
The dynamic adjustment mechanism allows the hinge to provide high torsion force specifically when the screen is in the closing or closed position to ensure stability and prevent falling. During the opening phase, the mechanism automatically reduces the torsion force to a level that allows single-handed operation, thus resolving the contradiction between stability and ease of operation.
Solution Approach 2:
The invention implements parameter changes in the torsion force based on the screen's angular position. The adjustable mechanism ensures that torsion is maximized when needed for support (during closing and at closed position) and minimized during opening operations, enabling both screen stability and user-friendly operation.
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
Enables easy opening of the device without lifting the body and prevents the screen from automatically falling during closure, ensuring the device's components are protected from impact.
Implementation Method 1
the friction part contacts the hinge and limits a rotation of the pivot part on the hinge
Data Source
AI summary
A hinge mechanism for a foldable electronic device is provided. The hinge mechanism includes a hinge, a pivot part and a friction part. The hinge and the pivot part are fixed to a first body and a second body of the foldable electronic device respectively. The friction part is connected to the pivot part and selectively contacting the hinge. When the pivot part rotates relative to the hinge to drive the first body to rotate from a close position to an open position in relative to the second body, the friction part does not contact the hinge. When the pivot part rotates relative to the hinge to drive the first body to rotate from the open position to the close position in relative to the second body, the friction part contacts the hinge and limits a rotation of the pivot part on the hinge.