Press-Rotate Input Mechanism With Variable Axes to Prevent Double Clicking
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Solution Overview
Problem
Existing press-type input devices can experience unintended double clicking due to multiple push switches being activated by a single intended push operation, leading to unreliable detection.
Innovation Solution
A press-type input device with a rotor and circuit block configuration, where the rotor is rotatable around a cylindrical part, and a detection unit accurately detects the rotation amount, preventing unintended multiple activations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple push switches are provided to detect push operations, then the detection coverage is improved, but unintended double clicking occurs due to multiple switches being activated by a single push
Solution Approach 1:
A single push switch is positioned at an optimized location to serve as an intermediary detection point. This switch detects push operations through the transmission of force from the operation shaft, providing reliable detection without the false activations that occur with multiple switches. The push switch acts as a mediator between the operation shaft and the control system, ensuring accurate detection while preventing unintended multiple activations.
2Ease of operation
If push switch is positioned to be easily driven, then ease of operation is improved, but unintended multiple activations occur
Solution Approach 1:
The push switch is positioned at a specific optimized location rather than being distributed across multiple positions. This localized positioning ensures that the switch is driven reliably by the operation shaft while preventing unintended activations. The local quality of the detection system is enhanced by concentrating the detection function at one strategically chosen position, balancing ease of operation with detection reliability.
3Device complexity
If the axis location is fixed, then device simplicity is maintained, but detection accuracy decreases when push location varies
Solution Approach 1:
The system transitions from a fixed axis configuration to a dynamic axis configuration where the axis location varies based on the push location. This dynamic adjustment allows the detection system to maintain high accuracy regardless of where on the operation shaft the user pushes. The axis position is no longer static but adapts to the input location, enhancing measurement precision while maintaining reasonable device complexity through controlled variability.
Data Source
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AI summary
A press-type input device 1 includes a first pressing member 31, a second pressing member 32, a base 4, and a holding member 2. The first pressing member 31 has a pressure receiving surface 310 and a first axis S1 and is tiltable around the first axis S1. The second pressing member 32 has a second axis S2 and is tiltable around the second axis S2. The base 4 includes a detection unit 40 configured to detect a tilt of the second pressing member 32. The holding member 2 is configured to hold, together with the base 4, the first pressing member 31 and the second pressing member 32. A location of at least one of the first axis S1 or the second axis 2 is variable in accordance with a pushed location on the pressure receiving surface 310. When viewed in a direction vertical to the pressure receiving surface 310, the second axis S2 and the detection unit 40 do not overlap each other.