Single-Axis Hinge Cam Mechanism for Stable Stand Angle
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Solution Overview
Problem
Existing hinge structures fail to stably maintain a fixed angle and height for a support stand, leading to unstable heat dissipation in laptops due to continuous linkage movement and gear disengagement issues.
Innovation Solution
A single-axis hinge mechanism incorporating a base, movable plate, limiting block, rotating shaft, and stand set with cams and transmission teeth, which restricts the stand drive shaft from continuous rotation, allowing the support stand to maintain a stable angle through a cam-driven limiting block mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If gears or connecting rods are used to link with the pivot shaft to lift the support stand, then the support stand can be driven to lift, but the linkage movement cannot be stopped and the lifting height becomes unstable
Solution Approach 1:
A cam mechanism is introduced as an intermediary between the driving force and the support stand. The cam converts continuous rotational motion into controlled linear motion, enabling the support stand to be lifted to a predetermined height and held stable without continuous movement
Solution Approach 2:
The cam profile is pre-designed with specific geometric characteristics that automatically limit the lifting motion to a predetermined height. The limiting block engages with the cam surface to initiate lifting action, and the cam geometry itself provides the stopping point, eliminating the need for continuous control
2Ease of operation
If a special-shaped gear is used to drive the support stand, then the support stand can be lifted, but when the gear is disengaged and impacted by external force, the linkage member angle changes and the supporting angle becomes unstable
Solution Approach 1:
The cam mechanism serves as a mediator that decouples the driving action from the support stand position. Once the limiting block engages with the cam profile, the support stand position is determined by the cam geometry rather than continuous gear engagement, making it resistant to external impacts
Solution Approach 2:
The cam mechanism provides periodic engagement and disengagement of the driving force. The limiting block engages with the cam surface during lifting and can be easily disengaged when the desired position is reached, allowing for controlled, periodic operation rather than continuous gear meshing
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 the support stand to form and maintain a stable supporting angle relative to the base, enhancing heat dissipation stability and preventing angle changes during external forces, thus addressing the instability issues of prior art hinge structures.
Implementation Method 1
the rotating shaft is provided with a driving block and a first cam disposed corresponding to the limiting block to push the limiting block when the rotating shaft rotates... the second cam is formed with a positioning notch into which the limiting block can be stuck when being pushed by the first cam
Data Source
AI summary
A single-axis hinge includes a base, a movable plate, a limiting block, a rotating shaft and a stand set. The base includes a first shaft mounting hole, a stand drive shaft mounting hole and a path. The movable plate is formed with a second shaft mounting hole and a limiting notch. The limiting block is installed in the path. The rotating shaft passes through the first and second shaft mounting holes and includes a driving block and a first cam. An edge of the driving block is formed with a transmission teeth portion not completely surround the edge. The stand set includes a stand drive shaft disposed in the stand drive shaft mounting hole, and a support stand driven by the stand drive shaft. The stand drive shaft includes a gear and a second cam formed with a positioning notch.