Push Operation Switch With Segmented Contact Portions
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Solution Overview
Problem
Conventional trigger switches experience high operation loads due to the sliding motion of the push-button on the movable contact piece, which increases the effort required for a pushing operation.
Innovation Solution
A switch design featuring a movable member with a swingable piece and a pressing member that includes a first and second contact portion, where the first contact portion slides along the movable piece and the second contact portion presses it orthogonally, reducing the operation load by distributing the force more efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the push-button slides on the movable contact piece in a direction orthogonal to the pressing direction, then the switch can be actuated, but the operation load becomes large
Solution Approach 1:
The pressing member is divided into two separate contact portions: a first contact portion that presses in the orthogonal direction and a second contact portion that presses in the movement direction. This segmentation allows each contact portion to handle a specific component of the force, reducing the overall operation load by distributing the mechanical stress across two distinct interaction points rather than requiring one contact point to handle both directional forces simultaneously.
Solution Approach 2:
The solution introduces a second dimensional pressing action by adding the second contact portion that presses in the movement direction (parallel to push-button displacement), complementing the first contact portion's orthogonal pressing action. This two-dimensional pressing approach transforms a single-direction orthogonal press into a combined orthogonal and longitudinal pressing mechanism, efficiently converting the sliding motion into effective switch actuation with reduced load.
2Force
If a single contact portion presses orthogonally, then the contact is simple, but the force transmission efficiency is low
Solution Approach 1:
The pressing member is divided into two separate contact portions: a first contact portion that presses in the orthogonal direction and a second contact portion that presses in the movement direction. This segmentation allows each contact portion to handle a specific component of the force, reducing the overall operation load by distributing the mechanical stress across two distinct interaction points rather than requiring one contact point to handle both directional forces simultaneously.
Solution Approach 2:
The solution merges two pressing actions (orthogonal pressing by the first contact portion and longitudinal pressing by the second contact portion) into a single integrated pressing member. This combination allows both pressing directions to work together synergistically, improving force transmission efficiency while maintaining a relatively simple overall structure that does not require separate mechanisms for each pressing direction.
Data Source
AI summary
A switch may include: a movable member comprising a movable piece extending from a swing shaft and being swingable around the swing shaft; and a pressing member configured to press the movable piece while moving in response to a pushing operation, the movable piece swinging in response to pressing from the pressing member. The pressing member comprises a first contact portion configured to slide along an extending direction of the movable piece in a state of being in contact with the movable piece due to movement by the pushing operation, and a second contact portion configured to be in contact with the movable piece at a position different from a position where the first contact portion is in contact, due to the movement by the pushing operation, and the pressing member presses the movable piece by the first contact portion and the second contact portion in a contact state.