Atomic Absorption Spectrophotometer Holder With Threaded Access
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Solution Overview
Problem
The holder in atomic absorption spectrophotometers is difficult to attach and remove due to reversed positions of the cup and handle during attachment and removal, requiring access from both sides.
Innovation Solution
A holder is designed with a through hole and threaded fittings, allowing it to be attached and removed from a single direction using dedicated bolts with specific thread configurations, including a first bolt for pressing from the rear and a second bolt with an abutment portion for pulling from the front, utilizing a movable portion with biased movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the holder is attached and removed using a cup and handle pressed into a cooling block, then the holder can be securely fixed, but access from both sides is required which complicates the operation
Solution Approach 1:
The invention inverts the conventional attachment mechanism by providing threaded portions directly on the holder itself rather than requiring external cup and handle components pressed into the block. The first and second threaded portions enable attachment and removal from a single direction, reversing the traditional two-sided access requirement while maintaining secure fixation.
Solution Approach 2:
The holder is segmented into functional zones with distinct threaded portions: a first threaded portion for secure attachment and a second threaded portion for controlled removal. This segmentation allows each threaded portion to serve its specific function in the attachment/removal cycle, enabling single-direction operation while maintaining fixation reliability.
2Reliability
If the holder requires access from both sides for attachment and removal, then secure fixation can be achieved, but the device requires more space and has higher complexity
Solution Approach 1:
The holder integrates multiple functions into a single component structure. The same holder body contains both the first threaded portion for attachment and the second threaded portion for removal, eliminating the need for separate cup and handle components. This multi-functionality reduces device complexity while maintaining fixation reliability.
Solution Approach 2:
Instead of using external pressing components (cup and handle) that require two-sided access, the invention inverts the approach by providing integrated threaded portions on the holder that enable both attachment and removal operations from a single direction, simplifying the overall mechanism.
3Ease of operation
If the holder is designed with threaded portions for single-direction access, then operation is simplified, but the structural complexity increases
Solution Approach 1:
The invention merges the attachment and removal mechanisms into a single integrated holder structure. Both the first threaded portion for attachment and the second threaded portion for removal are provided directly on the holder body, combining multiple functions into one component and reducing overall structural complexity.
Solution Approach 2:
The holder serves multiple functions: it holds the graphite tube, provides attachment interface through the first threaded portion, and enables removal through the second threaded portion. This multi-functionality is achieved within a single structural design, avoiding the need for separate components and reducing overall 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
Facilitates single-direction access for holder attachment and removal, reducing space requirements and simplifying the process, while maintaining efficient heat conduction and preventing heat diffusion during analysis.
Implementation Method 1
a first bolt including a first male thread portion and a shaft portion is inserted into the through hole in the direction of fitting, the first male thread portion being located on the front side in the direction of fitting, having a maximum diameter smaller than the minimum diameter of the second female thread portion, and being fitted to the first female thread portion, the shaft portion being located on the rear side in the direction of fitting of the first male thread portion and having an outer diameter smaller than the minimum diameter of the second female thread portion, the first male thread portion is fastened to the first female thread portion so that the first bolt can press the holder from the rear side toward the front side in the direction of fitting
Implementation Method 2
as a second bolt including an abutment portion and a second male thread portion is inserted into the through hole in the direction of fitting and the second male thread portion is fastened to the second female thread portion with the abutment portion abutting on the small-diameter portion, the abutment portion being located on the front side in the direction of fitting, having an outer diameter smaller than the minimum diameter of the first female thread portion and larger than the inner diameter of the small-diameter portion, and being able to abutting on the small-diameter portion in the direction of fitting, the second male thread portion being located on the rear side in the direction of fitting of the abutment portion and being fitted to the second female thread portion, the movable portion that is moved toward the holder can press the holder from the front side toward the rear side in the direction of fitting
Implementation Method 3
the holder holding a tube for heating a sample as a result of flow of a current
Data Source
AI summary
An atomic absorption spectrophotometer includes a first holder, a fixed portion, and a movable portion. In an inner circumferential surface of the fixed portion, a first female thread portion is formed from an end on a rear side toward a front side in a direction of fitting of the fixed portion to the first holder, and a small-diameter portion having an inner diameter smaller than a minimum diameter of the first female thread portion is formed while it is located on the front side in the direction of fitting with respect to the first female thread portion. In an inner circumferential surface of the movable portion, a second female thread portion having a minimum diameter larger than a maximum diameter of the first female thread portion is formed from an end on the rear side toward the front side in the direction of fitting of the movable portion.