Push Switch Movable Member Structure for Low-Height Pressing Force
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Solution Overview
Problem
Existing push switches face challenges in downsizing while maintaining the required pressing force magnitude, which affects their compactness and efficiency in electronic devices.
Innovation Solution
The input device incorporates a movable member with an outer peripheral suppression structure that allows for elastic deformation, enabling downsizing while maintaining the necessary pressing force, utilizing a capacitive pressure sensor and a suppression structure to stabilize the movable member's deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the push switch is downsized to reduce height, then the compactness is improved, but the magnitude of pressing force required to deform the movable member increases
Solution Approach 1:
The movable member is divided into a center part and an outer peripheral part with distinct functions. The center part is designed to deform elastically under pressing force, while the outer peripheral part includes a suppression structure that prevents excessive deformation. This segmentation allows the movable member to be smaller while maintaining appropriate pressing force characteristics.
Solution Approach 2:
Different regions of the movable member are given different mechanical properties. The center part has higher elasticity to allow deformation, while the outer peripheral part has suppressed elasticity through the suppression structure. This local differentiation enables compact dimensions while controlling the pressing force magnitude through localized structural features.
2Ease of operation
If the movable member is made more elastic to facilitate deformation, then the ease of operation is improved, but the stability of deformation control deteriorates
Solution Approach 1:
The movable member is segmented into a center part that deforms easily and an outer peripheral part with suppression structures. This segmentation allows the center part to be highly elastic for easy operation while the outer peripheral part provides stability by limiting excessive deformation, thus controlling the overall deformation behavior.
Solution Approach 2:
The suppression structure in the outer peripheral part is designed in advance to counteract excessive deformation. By pre-configuring this suppression mechanism, the movable member maintains stable deformation control while still allowing easy operation through the elastic center part.
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 allows for a reduced height of the input device while maintaining the required pressing force, enhancing compactness and stability, and is cost-effective due to a simple fabrication process.
Implementation Method 1
The movable member is configured to elastically deform by receiving pressing force to relatively displace the movable electrode toward the fixed electrode
Data Source
AI summary
An input device includes a fixed electrode, a movable electrode, and a movable member. The movable member is configured to elastically deform by receiving pressing force to relatively displace the movable electrode toward the fixed electrode. The movable member has an outer peripheral part. The outer peripheral part includes a suppression structure configured to suppress the movable member from being elastically deformed by the pressing force.