Sealed Charging Pipe End with Inorganic Covering and Metal Cap
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Solution Overview
Problem
Laser excitation light sources face gas leakage issues due to temperature-induced expansion of the sealed end portion of the charging pipe, leading to reduced lifespan as the light-emitting gas leaks over time.
Innovation Solution
A light emitting sealed body with a charging pipe end portion sealed by a covering member made of inorganic material, covered with a cap member of metal material, where the covering member has a higher thermal expansion coefficient and hardness than the pipe, preventing the end portion from opening and maintaining gas pressure even under high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the charging pipe end portion is sealed by being crushed, then the device complexity is reduced, but the reliability deteriorates due to gas leakage under high temperature and pressure conditions
Solution Approach 1:
The patent applies composite materials by combining the crushing seal (first sealing means) with an additional sealing layer (second sealing means) made of different materials with complementary properties. This composite sealing structure maintains simplicity while significantly improving reliability under high temperature and pressure conditions.
Solution Approach 2:
The patent implements beforehand cushioning by providing a backup sealing mechanism that activates when the primary crushing seal becomes insufficient due to thermal expansion or pressure. The additional sealing layer prevents gas leakage before it can occur, ensuring continuous reliable operation.
2Productivity
If the light-emitting gas is charged at high pressure for high efficiency and high output, then the productivity is improved, but the reliability deteriorates as the sealed end portion opens and gas leaks during continuous operation
Solution Approach 1:
The patent provides a backup sealing mechanism that prevents gas leakage before it can occur during high-pressure operation. The additional sealing layer is designed to compensate for thermal expansion and pressure-induced opening of the crushing seal, maintaining high productivity without reliability loss.
Solution Approach 2:
The patent changes the sealing parameters by introducing a second sealing means with different material properties and sealing mechanisms. This allows the system to maintain high pressure for productivity while the enhanced sealing parameters prevent leakage, resolving the contradiction between output and durability.
3Ease of manufacture
If the charging pipe end portion is sealed by being crushed, then the ease of manufacture is improved, but the loss of substance occurs as light-emitting gas leaks over time
Solution Approach 1:
The patent combines the simple crushing seal with an additional sealing layer made of different materials. This composite approach maintains the ease of manufacture of the crushing seal while preventing gas leakage through the complementary sealing properties of the second sealing means.
Solution Approach 2:
The additional sealing layer acts as a preventive measure that stops gas leakage before it can occur. This maintains the simplicity of the original sealing process while eliminating substance loss through the backup sealing mechanism.
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 effectively prevents gas leakage and extends the lifespan of the light source device by ensuring the sealed end portion remains closed, even under high pressure and temperature conditions.
Implementation Method 1
A thermal expansion coefficient of the covering member may be larger than a thermal expansion coefficient of the charging pipe. In this case, when the temperature rises, the second end portion of the charging pipe can be effectively pressed by the covering member, and the second end portion can be further prevented from being opened.
Implementation Method 2
A hardness of the cap member may be larger than a hardness of the charging pipe. In this case, when the temperature rises, the covering member can be easily deformed toward a second end portion side instead of toward a cap member side, and the second end portion can be further prevented from being opened.
Data Source
AI summary
A light emitting sealed body includes: a housing containing light-emitting gas in an internal space, on which laser light for maintaining a plasma generated in the light-emitting gas is incident; and a charging pipe including a first end portion and a second end portion and connected to the internal space at the first end portion. The second end portion of the charging pipe is sealed by being crushed. The second end portion of the charging pipe is covered with a covering member consists of an inorganic material. The covering member is covered with a cap member consists of a metal material.