Multi-Way Input Shaft Assembly for Precise Switch Actuation
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Solution Overview
Problem
Conventional multi-way input devices lack precision in switch actuation force, which can impact the operation of selection functions and affect the angular position of potentiometer or Hall effect sensor magnets.
Innovation Solution
The multi-way input device incorporates an articulation member and a second interlocking member with a small free play, allowing the operating shaft to be supported by a hollow frame around multiple axes, featuring magnetic sensing components and a push-button tact switch, ensuring precise operation without parasitic rotations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the switch actuating force is applied to the operating shaft to activate the switch for control of selection functions, then the switch can be turned ON and OFF, but the actuating force may not be sufficiently precise and may have an impact on the angular position of the potentiometer or Hall effect sensor magnets
Solution Approach 1:
The device is segmented into functionally independent units: the first interlocking member with first sensing component for rotational detection, the second interlocking member with second sensing component for orthogonal rotational detection, and the third sensing component (push-button switch) for selection activation. This segmentation allows each component to perform its function independently without interfering with others, particularly isolating the switch actuation force from affecting the angular positions of the potentiometer or Hall effect sensor magnets.
Solution Approach 2:
The operating shaft serves as an intermediary mechanism that transmits user input through multiple independent pathways: it can rotate the first interlocking member, rotate the second interlocking member, or actuate the third sensing component. This intermediary structure allows precise control of switch actuation force while maintaining stable angular positions of other sensing components, as the force is transmitted through defined mechanical paths rather than directly affecting all components.
2Adaptability or versatility
If the operating shaft is supported by multiple interlocking members and sensing components, then the device can detect multiple directions of operation, but the structure becomes more complex
Solution Approach 1:
The first and second interlocking members are merged into a single integrated structure that shares common mounting features and support mechanisms within the hollow frame. This merging reduces the number of separate mounting operations and simplifies the overall structural complexity while maintaining the capability to detect rotations in multiple directions through the orthogonal arrangement of the interlocking members and their associated sensing components.
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 design enhances the precision and efficiency of the multi-way input device, providing a smooth and precise selection action without affecting the angular position of sensors, thus improving overall device performance.
Implementation Method 1
The use of Hall effect sensors is already known from GB2091423 concerning a transducer device associated with a joystick control lever.
Data Source
AI summary
A multi-way input device includes a first interlocking member, a second interlocking member, a hollow frame within which the interlocking members are mounted, and an operating shaft inserted through both a slit of the first interlocking member and a slot of the second interlocking member. The device also includes first and second sensing components capable of being operated respectively through the first and second interlocking members when rotating by operation of the operating shaft, along with third sensing component capable of being operated through the second interlocking member when pivoting by operation of the operating shaft. The device also includes an articulation member that is rotatably supported by the hollow frame around an axis. The second interlocking member is supported by the articulation member to form a mobile unit that is rotatable. The second interlocking member is also pivotally mounted on the articulation member.