Timepiece Optical Sensor Sealing for High-Pressure Waterproofing
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Solution Overview
Problem
Existing detection devices in timepieces, such as wristwatches, lack sufficient waterproofing capabilities, particularly for high-pressure environments, due to the conventional welding of transparent plates over light receiving and emitting holes, which compromises the integrity of the waterproof seal.
Innovation Solution
A detection device with a light receiving hole and light emitting holes in the wristwatch case, featuring waterproof members between the outer and inner circumferential surfaces of glass covers and holes, ensuring high-pressure waterproofing through the use of waterproof packings and strategically designed light blocking sections to enhance detection performance and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If welding transparent plates over light receiving and emitting holes is used, then the detection device can be assembled, but the waterproof seal integrity deteriorates under high-pressure conditions
Solution Approach 1:
A waterproof member (intermediary element) is introduced between the transparent plate and the case body at the light receiving and emitting holes. This waterproof member includes a sealing portion that protrudes into the light receiving hole, creating a reliable seal that prevents water penetration under high-pressure conditions while allowing the detection device to function properly.
2Reliability
If a waterproof member is added to improve sealing, then waterproofing capability is improved, but device complexity increases
Solution Approach 1:
The waterproof member is integrated with the transparent plate and case body assembly. The waterproof member includes a base portion that contacts the transparent plate and a sealing portion that extends into the light receiving hole, combining multiple functions (structural support, sealing, and pressure resistance) into a single component to minimize overall complexity while achieving reliable waterproofing.
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 solution achieves high-pressure waterproofing and enhances the detection performance of biological information, such as pulse rate and oxygen saturation, by ensuring reliable sealing and blocking of unnecessary light, thereby improving the device's functionality and usability.
Implementation Method 1
a light emitting hole corresponding to a light emitting element
Implementation Method 2
a light receiving hole corresponding to a light receiving element
Data Source
AI summary
A detection device including a device main body provided with a light receiving hole corresponding to a light receiving element and a light emitting hole corresponding to a light emitting element, and a waterproof member arranged between an outer circumferential surface of a cover arranged in the light receiving hole or the light emitting hole and an inner circumferential surface of the light receiving hole or the light emitting hole.