Control Ring Damping via Gravity Wheel and Rack
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Solution Overview
Problem
Conventional input devices with control rings often result in a light and empty feeling, leading to accidental rotation and erroneous control signals due to their lack of damping mechanism.
Innovation Solution
The integration of a damping mechanism using a gravity wheel and rack structure in the control ring, which includes a gear and rotation shaft, along with a bearing and clamping seats, to suppress unwanted rotation and enhance operational stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional control ring is used in an input device, then the device structure is simple and easy to manufacture, but the control ring is easily rotated accidentally and generates erroneous control signals
Solution Approach 1:
A rack structure is introduced as an intermediary mechanism between the control ring and the gravity wheel. The rack structure converts the rotational motion of the control ring into linear motion that engages with the gravity wheel, providing controlled resistance without directly coupling the control ring to the damping mechanism.
Solution Approach 2:
A gravity wheel is implemented to provide a counterbalancing force that resists accidental rotation of the control ring. The gravity wheel uses gravitational force to create a damping effect, making the control ring harder to rotate unintentionally while still allowing deliberate user operations.
2Reliability
If a damping mechanism is added to the control ring to prevent accidental rotation, then the control signal accuracy improves, but the ease of operation decreases
Solution Approach 1:
The damping mechanism is designed to be dynamic rather than static. The gravity wheel and rack structure create a system where the resistance to rotation changes based on the operating state, allowing easy rotation during intentional use while providing resistance against accidental touches.
Solution Approach 2:
The control ring structure is segmented into functional parts: the control ring itself, the rack structure for motion conversion, and the gravity wheel for damping. This segmentation allows each component to be optimized independently, maintaining ease of operation for the control ring while providing damping through the gravity mechanism.
3Reliability
If a gravity wheel and rack structure are integrated into the control ring, then accidental rotation is suppressed, but the device complexity increases
Solution Approach 1:
The gravity wheel serves multiple functions: it provides damping to prevent accidental rotation, enables controlled rotation during intentional use, and can be integrated with the existing control ring structure. The rack structure similarly serves both as a motion converter and as a structural connector.
Solution Approach 2:
The damping mechanism (gravity wheel and rack structure) is merged with the control ring assembly rather than being separate components. This integration reduces the overall device complexity by combining multiple functions into a unified structure that shares common elements with the existing control ring design.
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
The solution provides a smooth and controlled rotation of the control ring, minimizing accidental touches and ensuring precise operation by incorporating a rotation damping effect, thus reducing the likelihood of erroneous signal generation.
Implementation Method 1
A rotation of the control ring is suppressed by the gravity wheel
Implementation Method 2
When the control ring is operated by the user, the control ring can be freely and smoothly rotated
Data Source
AI summary
An input device includes a casing, a base member, a ball member, a control ring and a gravity wheel. The casing includes an upper cover and a lower cover. The upper cover has an opening. The ball member is installed on the base member. The ball member is partially exposed outside the opening. The control ring is arranged around the base member. The control ring is partially exposed outside the opening. The control ring is freely rotatable around the base member. The control ring includes a first inclined part, a rack structure, and a lateral wall. The lateral wall is connected with the first inclined part and the rack structure. The gravity wheel is engaged with the rack structure. Consequently, the rotation of the control ring is suppressed by the gravity wheel.