Seesaw Switch Erroneous Operation Preventer Design
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Solution Overview
Problem
Existing seesaw-shaped switch devices with erroneous operation preventers either fail to prevent finger-induced erroneous operations due to inadequate protective wall spacing or increase manufacturing costs with additional components.
Innovation Solution
A switch device with an erroneous operation preventer featuring a frame-shaped preventer that includes side protective walls, side frame portions, an end protective wall, and claws for secure attachment, ensuring the preventer covers the flange portion of the switch main body and prevents finger insertion between the protective walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If protective walls are provided with a distance larger than the width of the switch member, then the structure is simpler and manufacturing cost is lower, but erroneous operation by finger insertion cannot be fully prevented
Solution Approach 1:
The protective walls are divided into two segments: a first protective wall and a second protective wall, with the second protective wall positioned closer to the switch member than the first protective wall. This segmentation creates multiple barriers that prevent finger insertion while maintaining structural simplicity and low manufacturing cost.
2Reliability
If an operation locking bar is provided to prevent erroneous operation, then erroneous operation prevention reliability is improved, but the number of components increases and manufacturing cost increases
Solution Approach 1:
The erroneous operation prevention function is merged into the protective walls themselves, which are integral parts of the switch housing. The first and second protective walls work together as a unified structure to prevent finger insertion, eliminating the need for separate operation locking bars and reducing the total number of components.
3Reliability
If protective walls extend upright on both sides of the switch member, then erroneous operation prevention is improved, but the distance between protective walls must be larger than switch member width
Solution Approach 1:
The protective walls have different positions and orientations tailored to local requirements. The first protective wall extends upright from the rear surface, while the second protective wall is positioned closer to the switch member. This local differentiation allows effective finger insertion prevention while optimizing the distance between walls to be just sufficient for the switch member width.
Data Source
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AI summary
A switch device with an erroneous operation preventer, including: a switch main body (20) having a switch member (22) supported by a shaft (24) with respect to a casing (21) and configured such that pushing a first end portion (25) of the switch member causes a second end portion (26) thereof to protrude and such that an on state and an off state of the switch main body are changed by pushing one of the first and second end portions; and a frame-shaped erroneous operation preventer (30) disposed around the switch member for preventing an erroneous operation on the first end portion that takes a protruding posture when the switch main body is in one of the on and off states, the preventer having side protective walls (31) extending in a longitudinal direction of the switch member so as to cover a surface of a flange portion (21a) of the casing on both sides of the first end portion.