Magnetic Stylus Ejection Mechanism for Foldable Electronics
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Solution Overview
Problem
Existing stylus designs for electronic devices, such as notebook computers, lack operational convenience as they require users to manually pull the stylus out of a slot, which is cumbersome and inefficient.
Innovation Solution
A positioning mechanism utilizing magnetic components and an elastic part to automatically slide the stylus out of the slot when the device is unfolded, facilitated by a change in magnetic attraction force relative to the elastic restoring force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stylus is fixed in the stylus slot with the end exposed, then the stylus can be easily accessed, but the user must manually pull the stylus out which lacks operational convenience
Solution Approach 1:
The positioning mechanism automatically pushes the stylus out of the stylus slot when the electronic device is unfolded, without requiring manual intervention. The mechanism uses the relative motion between the first and second bodies to trigger automatic stylus ejection, making the system serve itself rather than requiring user operation.
Solution Approach 2:
The positioning mechanism transitions between different states based on the folding state of the electronic device. When folded, the mechanism holds the stylus in place; when unfolded, the mechanism automatically pushes the stylus out. This dynamic adaptation to device state changes enables automatic stylus ejection without complex controls.
2Ease of operation
If a positioning mechanism with magnetic components and elastic parts is added to automatically push the stylus out, then operational convenience is improved, but the device complexity increases
Solution Approach 1:
The positioning mechanism replaces complex mechanical control systems with a combination of magnetic attraction and elastic restoration. The magnetic component provides holding force when folded, while the elastic part provides pushing force when unfolded, eliminating the need for motors, sensors, or complex linkages.
Solution Approach 2:
The mechanism exploits changes in magnetic attraction force as the device transitions between folded and unfolded states. As the distance between the first and second bodies changes, the magnetic attraction force changes, automatically triggering the elastic part to push the stylus out when the attraction force decreases below the elastic restoring force.
3Reliability
If the stylus remains fully inserted in the stylus slot during folding, then device integrity is maintained, but quick extraction becomes difficult
Solution Approach 1:
The positioning mechanism performs preliminary action by automatically pushing the stylus out of the stylus slot before the user needs to extract it. When the device is unfolded, the mechanism proactively moves the stylus to an accessible position, so the user only needs to grab and take the stylus, significantly reducing extraction time.
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 quick and convenient extraction of the stylus, maintaining device integrity and preventing loss, while enhancing user experience.
Implementation Method 1
a first magnetic component... has a second magnetic component corresponding to the first magnetic component... magnetic attraction force generated between the second magnetic component and the first magnetic component
Implementation Method 2
an elastic restoring force of the elastic part... to drive the driving part to rotate
Data Source
AI summary
An electronic device including a first body, a second body, a stylus, and a positioning mechanism is provided. The second body is pivotally connected to the first body and has a stylus slot. The stylus is accommodated in the stylus slot, wherein the positioning mechanism is disposed in the stylus slot and the stylus is fixed to the positioning mechanism. When the second body is unfolded relative to the first body, the positioning mechanism is adapted to move the stylus out of the stylus slot.