Trigger Switch Elastic Deformation Section for Waterproofing
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Solution Overview
Problem
Conventional trigger switches experience a significant change in internal pressure due to the operation stroke, which affects the waterproofness and dustproofness, especially in small-sized waterproof cases, leading to potential water ingress and compromised sealing.
Innovation Solution
A trigger switch design featuring a case member with an inelastic case base and elastic deformation sections that adjust internal pressure by deforming to maintain waterproofness, incorporating a sealing member to secure the case and operation section, reducing the impact of pressure changes during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a small-sized waterproof case is used, then the device size is reduced, but the internal pressure changes significantly during operation affecting waterproofness
Solution Approach 1:
The patent introduces a deformation section that changes its volume in response to internal pressure changes during operation. This dynamic parameter change compensates for the pressure variations caused by the narrow inner space of the compact case, thereby maintaining waterproofness despite the reduced case size.
Solution Approach 2:
The deformation section is made from an elastic body that can expand and contract to accommodate pressure changes. This flexible component acts as a pressure compensation mechanism, allowing the compact waterproof case to maintain its sealing integrity during operation strokes without compromising waterproofness.
2Ease of operation
If the operation section is pushed inward, then the switch operation is activated, but the internal pressure increases affecting sealing
Solution Approach 1:
The deformation section serves as an intermediary pressure compensation mechanism between the operation section and the waterproof case interior. When the operation section is pushed inward, the deformation section expands to absorb the pressure increase, preventing water ingress while allowing smooth switch operation.
3Reliability
If sealing members are added to ensure waterproofness, then airtightness is improved, but internal pressure changes still affect the sealing
Solution Approach 1:
The deformation section provides beforehand cushioning by being pre-configured to expand and contract in response to pressure changes. This anticipatory pressure compensation protects the sealing members from excessive stress during operation, maintaining airtightness without compromising the sealing structure.
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
The design effectively stabilizes internal pressure within the waterproof case, preventing water ingress and maintaining sealing integrity by allowing the elastic deformation sections to absorb pressure changes, thus enhancing the waterproofness and dustproofness of the trigger switch.
Implementation Method 1
the case base including at least one (1) deformation section which (i) seals the at least one hole part, (ii) is made from an elastic body, and (iii) deforms in accordance with the change in internal pressure of the waterproof case
Data Source
AI summary
A trigger switch has a case member, a cover member, and an operation member configured to be used to carry out an operation. The case member and the cover member are combined with each other to form a waterproof case. When the operation member is operated, the operation member is displaced inward of the waterproof case. An internal pressure of the waterproof case changes in accordance with displacement of the operation member. The case member has a case base that is made from an inelastic body. The case base does not deform in accordance with a change in internal pressure of the waterproof case. The case base has at least one hole part. The case member has at least one deformation section that seals the at least one hole part. The deformation section is made from an elastic body.