Oscillator-Type Switch Asymmetric Elastic Mounting
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Solution Overview
Problem
Oscillator-type switches face operational instability when the fixed end side end portion of the operation unit is pressed, resulting in a reverse-direction rotational moment that prevents switch operation.
Innovation Solution
The oscillator-type switch design includes an elastic member mounted on a base, an oscillation member with a driving section connected in a specific horizontal direction, an operation unit, a reaction force application member, and a detector, where the elastic member is positioned to ensure a consistent rotational moment regardless of the pressing position, allowing stable operation by applying a reaction force and utilizing a ridge portion for enhanced rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operation unit is pressed at the fixed end side end portion, then a reverse-direction rotational moment is generated, but the switch operation becomes impossible
Solution Approach 1:
The elastic member is positioned asymmetrically relative to the operation unit, specifically arranged so that its center line in the first horizontal direction falls within a range that is outside the projection area of the operation unit. This asymmetric arrangement ensures that pressing any position of the operation unit generates a rotational moment in the same direction, eliminating the reverse-direction moment problem and enabling reliable switch operation.
2Reliability
If the elastic member is repositioned to ensure consistent rotational moment, then switch operation stability is improved, but the device structure becomes more complex
Solution Approach 1:
The elastic member serves multiple functions: it provides the necessary rotational moment for switch operation, acts as a support structure for the oscillation member, and functions as a spring element for the reaction force application. By making the elastic member multi-functional, the patent achieves improved operational stability without proportionally increasing device complexity.
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 configuration ensures stable switch operation regardless of the pressing position, maintaining consistent click feeling and operation load, and allows for high-rigidity oscillation members with reduced deflection and design impact, enabling comfortable and natural finger operation.
Implementation Method 1
an elastic member (6) mounted on the lower side substrate (4) and flexible in an up-down direction
Implementation Method 2
a reversal spring (10) arranged between the driving section (7b) of the oscillation member (7) and the pressure-sensitive switch sheet (5) and functioning as a reaction force application member that applies a reaction force
Data Source
AI summary
An oscillator-type switch includes a base, an elastic member mounted on the base and flexible in an up-down direction, an oscillation member having a base portion mounted on the elastic member and a driving section connected from the base portion in a first horizontal direction along an upper surface of the base, a key top set on the oscillation member, a reversal spring applying a reaction force to a downward movement of the driving section, and a pressure-sensitive switch sheet detecting the downward movement of the driving section. The elastic member is arranged for a center line in the first horizontal direction within a range in which the elastic member is mounted on the oscillation member to be positioned outside a projection area of the operation unit in the first horizontal direction.