Torch Membrane Seal for Waterproof Focus Adjustment
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Solution Overview
Problem
Existing torch designs fail to provide a reliable waterproof and dust-tight seal between the optical attachment and the LED, leading to potential moisture and dust penetration, especially when the optical attachment is displaced relative to the LED.
Innovation Solution
A silicone or natural rubber membrane is used to create a waterproof and dust-tight seal between the LED and the optical attachment, allowing for displacement without friction-induced wear, and is secured with a collar or annular rib configuration to ensure secure fixing and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If O-rings are used as a seal in the lamp head, then the torch structure is simple, but the sealing reliability is insufficient and moisture/dust can penetrate
Solution Approach 1:
The patent replaces traditional O-ring seals with a flexible membrane that spans the entire opening in the lamp head. This membrane is made of elastomeric material and is tensioned by a spring mechanism to maintain continuous contact with the LED support element, creating a more reliable seal that prevents moisture and dust penetration while accommodating the displacement of the optical attachment.
2Adaptability or versatility
If the optical attachment is displaced relative to the LED to adjust light cone, then the light focusing capability is improved, but the seal is exposed to friction forces and wear
Solution Approach 1:
The patent replaces traditional mechanical seals (O-rings) with a membrane seal system that uses elastic deformation rather than friction-based sealing. The membrane is tensioned by a spring and deforms elastically as the optical attachment displaces, eliminating direct friction contact between the seal and moving parts while maintaining sealing effectiveness throughout the adjustment range.
3Reliability
If a membrane seal is used to prevent moisture and dust penetration, then the sealing reliability is improved, but the device complexity increases
Solution Approach 1:
The membrane seal serves multiple functions simultaneously: it provides waterproofing, dust protection, and accommodation for the displacement of the optical attachment. The spring mechanism integrated with the membrane provides both sealing force and mechanical compensation for positional changes, eliminating the need for separate sealing components and reducing overall 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
The membrane provides a wear-free, waterproof, and dust-tight seal, ensuring the torch remains functional without the need for frequent maintenance or replacement, while allowing for adjustable light cone focusing without compromising impermeability.
Implementation Method 1
Due to its elasticity, the membrane permits a displacement of the LED along the longitudinal axis relative to the optical attachment without this seal being exposed to friction forces
Implementation Method 2
a seal consisting of a membrane closes the space between the LED and the optical attachment in a waterproof and dust-tight manner
Data Source
AI summary
The invention relates to a torch having a housing in which at least one LED secured to a carrier element, and a lens system, are arranged and can be displaced relative to one another in order to focus the cone of light that is emitted. According to the invention, a seal consisting of a membrane (14) closes the space (23) between the LED (11) and the lens system (13) in a watertight and dust-proof manner.