Infrared Detection Module Nut Fastening for Compact Assembly
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Solution Overview
Problem
The reduction in size of infrared detection modules due to higher operating temperatures makes it difficult to access and tighten fastening screws, complicating the assembly of the detector housing onto the cooling machine housing.
Innovation Solution
A fastening device comprising a nut that secures the detector housing onto the cooling machine housing, eliminating the need for screws and allowing for a single screwing operation, which compresses a sealing joint for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the detector housing length is reduced to enable more compact binoculars, then the bulk of the infrared detection module along the optical axis is reduced, but access to the fastening screws becomes difficult
Solution Approach 1:
The patent inverts the traditional fastening approach by replacing multiple screws with a single nut that fastens onto the detector housing. This inversion allows the fastening operation to be performed from the rear of the module rather than requiring access to the front where space is constrained, thereby resolving the contradiction between compact size and ease of assembly
Solution Approach 2:
The single nut serves multiple functions: it provides the primary fastening connection, ensures sealing through compression of the sealing joint, and enables assembly with a single operation. This multi-functionality eliminates the need for multiple screws and complex assembly procedures, addressing both the compact size requirement and the ease of operation need
2Reliability
If multiple fastening screws are used to ensure sealing of the cooling machine housing, then reliable sealing is achieved, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The patent merges multiple fastening functions into a single nut that simultaneously provides mechanical fastening and sealing compression. This consolidation reduces the number of components and assembly steps while maintaining reliable sealing, directly addressing the contradiction between sealing reliability and assembly complexity
Solution Approach 2:
The nut is designed with functional segmentation: a threaded portion for fastening and a bearing surface for compression sealing. This segmentation allows a single component to perform multiple functions that previously required separate screws and sealing elements, simplifying the overall assembly process
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
Facilitates easier and more efficient assembly of the infrared detection module by simplifying the screwing process and ensuring a secure, homogeneous compression of the sealing joint with a single operation, even in compact designs.
Implementation Method 1
the effect of screwing of the nut is to compress the sealing joint between the detector housing and the cooling machine housing
Implementation Method 2
a cooling machine for cooling the detector
Implementation Method 3
the detector housing comprises a cold finger having an elongated cylindrical part intended to contain a heat exchanger of the cooling machine
Data Source
AI summary
The invention relates to an infrared detection module (4) comprising: a detection portion (7) comprising an infrared detector (16) and a detector housing (11) suitable for containing the infrared detector; a cold-production portion (8) comprising a refrigerating machine (39) for cooling the detector (16) and a refrigerating-machine casing (12) suitable for containing the refrigerating machine (39); and an attachment device (56) for attaching the detector casing (11) to the refrigerating-machine casing (12), the attachment device (56) comprising a nut (57) suitable for being screwed onto the detector housing (11) and/or onto the refrigerating-machine casing (12) so as to rigidly connect the casings to one another.