Rotary Push Input Assembly With Cam Rotation Restriction
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Solution Overview
Problem
Existing multiple-operation input devices can suffer damage when a strong rotation force is applied, as the rotary assembly or stopper may be damaged during engagement.
Innovation Solution
The device incorporates a rotation restrictor mechanism that restricts the rotation of the click-feeling cam via a slider, which includes a contact portion and a stopper or tapered surface, to prevent undesired rotation when the operation body is pressed, thereby reducing the risk of component damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rotary assembly is engaged with a stopper to restrict rotation, then rotation can be restricted, but the rotary assembly or stopper may be damaged when strong rotation force is applied
Solution Approach 1:
The patent introduces a slider as an intermediary component between the click-feeling cam and the rotation restrictor. The slider includes a contact portion that engages with the click-feeling cam and a stopper that restricts rotation. This intermediary structure distributes the rotational force and prevents direct engagement between the cam and stopper, thereby reducing the risk of damage while maintaining rotation restriction functionality.
2Reliability
If the operation body is pressed, then the push switch is activated, but undesired rotation of the operation body occurs
Solution Approach 1:
The patent applies preliminary anti-action by providing the rotation restrictor that prevents undesired rotation before it can occur during pressing operation. The stopper on the slider is positioned to engage with the click-feeling cam and prevent rotation in advance, ensuring that only the intended pressing action activates the push switch without unwanted rotational movement.
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 solution effectively reduces undesired rotation of the operation body when pressed, minimizing the risk of component damage even under strong rotation forces, while ensuring the push switch is still activated reliably.
Implementation Method 1
an elastic member configured to bias the slider toward the click-feeling cam
Data Source
AI summary
A multiple-operation input device includes: an operation body configured to rotate around a predetermined axis and to press in a first direction orthogonal to the axis; a shaft provided to project from the operation body on the axis and configured to rotate around the axis integrally with the operation body; a moving body configured to axially support the shaft and to reciprocatingly move in the first direction together with the shaft; a push switch configured to be pressed by the moving body and to switch to a switched-on state upon pressing of the operation body; a click-feeling cam configured to integrally rotate with the shaft; a slider configured to reciprocatingly move in the first direction and to include a tip contacting an outer periphery of the click-feeling cam; an elastic member configured to bias the slider; a casing; and a rotation restrictor configured to restrict rotation of the click-feeling cam.