Watch Crown Sealing Structure for 1500-Bar Pressure Resistance
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Solution Overview
Problem
Current watch crowns fail to guarantee sealing at high pressures, compromising either the sealing integrity or the ease of operation, particularly for diving enthusiasts and professional divers.
Innovation Solution
A sealing device for watches featuring a primary space with an insertion organ, first and second sealing elements sets, and a drive organ, which includes obstruction organs to limit displacement and ensure sealing in high-pressure environments, allowing the watch to be sealed for pressures up to 1500 bars without hindering the crown's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current watch crown sealing systems are used, then the structure is simple and easy to operate, but sealing is not guaranteed at high pressures beyond certain depth
Solution Approach 1:
The sealing device is divided into multiple independent sealing elements (first sealing element, second sealing element) located in different spaces (primary space, secondary space). Each sealing element independently seals its respective space, allowing the system to maintain reliability at high pressures while keeping individual components simple and manageable.
Solution Approach 2:
The insertion organ is inserted into the drive organ, creating a nested structure where the primary space and secondary space are hierarchically arranged. The first sealing element seals the primary space between the middle part and insertion organ, while the second sealing element seals the secondary space between the drive organ and insertion organ. This nested arrangement enables multi-level sealing without significantly increasing overall device complexity.
2Reliability
If sealing is ensured at high pressures, then reliability is improved, but handling and operation of the crown becomes difficult
Solution Approach 1:
The sealing device incorporates a return organ that automatically returns the insertion organ and drive organ to their initial positions after operation. This dynamic mechanism ensures that the sealing elements maintain proper positioning under high pressure while allowing easy operation during normal use. The holding organ also plays a role by securing the organs in specific positions when needed.
Solution Approach 2:
The return organ is configured to automatically return the insertion organ and drive organ to their initial positions without requiring additional manual intervention. This self-service mechanism maintains sealing reliability at high pressures while preserving ease of operation, as the system automatically resets itself after each operation cycle.
3Reliability
If multiple sealing elements are added to ensure high-pressure sealing, then sealing reliability is improved, but device complexity increases
Solution Approach 1:
The insertion organ serves multiple functions: it acts as a sealing surface for the first sealing element in the primary space, as a sealed container for the second sealing element in the secondary space, and as a mechanical connector between the crown and the watch case. This multi-functionality allows the system to achieve high-pressure sealing with minimal additional components.
Solution Approach 2:
The first sealing element and second sealing element are integrated into a unified sealing system where the insertion organ serves as the common interface. The holding organ and return organ are combined to provide both positioning and resetting functions. This merging of functions reduces overall device complexity while maintaining high-pressure sealing reliability.
Data Source
AI summary
A sealing device (100) for a watch (200) configured to be inserted into a primary space (201) comprised in a middle part (210). The sealing device (100) includes an insertion organ (110) configured to be inserted into the primary space (201), a first sealing elements set (120) configured to seal the primary space (201) between the middle part (210) and the insertion organ (110), and a sealing elements set (140) configured to seal a secondary space (131) between a drive organ (130) and the insertion organ (110).