NMR Angle Adjuster with Elastic Backlash Reduction
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Solution Overview
Problem
Conventional angle adjustment mechanisms for NMR probe devices are manually operated, leading to difficulties in precisely adjusting the angle of a sample tube.
Innovation Solution
An angle adjuster for NMR that includes a linear motion member, a conversion mechanism to convert rotary motion into linear motion, and elastic members to reduce mechanical clearance, enabling precise adjustment of the sample tube angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual operation is used for angle adjustment, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent replaces manual mechanical operation with an automated drive device that controls the rotary member's rotation. The drive device (motor or actuator) electronically controls the angle adjustment process, eliminating manual intervention and achieving precise angle positioning through controlled rotary motion conversion to linear motion of the sample tube.
Solution Approach 2:
The elastic member automatically compensates for mechanical clearance and maintains constant contact between the linear motion member and rotary member without requiring external adjustment. The elastic force from the elastic member self-regulates the engagement between components, ensuring consistent positioning accuracy without additional complex control mechanisms.
2Measurement precision
If mechanical clearance exists between rotary member and linear motion member, then ease of manufacture is improved, but measurement precision deteriorates
Solution Approach 1:
The elastic member changes the physical state of the engagement between the linear motion member and rotary member by applying elastic force. This parameter change transforms the rigid connection into a compliant connection that automatically adjusts to maintain optimal contact, reducing mechanical clearance effects without requiring ultra-precise manufacturing tolerances.
Solution Approach 2:
The elastic member provides beforehand cushioning by pre-compressing to create continuous contact force between the linear motion member and rotary member. This pre-applied elastic force compensates for any mechanical clearance that may exist during assembly, ensuring that the components remain engaged and positioned accurately throughout operation without requiring tight manufacturing tolerances.
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 angle adjuster allows for high-precision control of the sample tube angle, reducing backlash and improving the accuracy of NMR measurements.
Implementation Method 1
a first elastic member which, at a portion where the linear motion member and the rotary member are in engagement with each other, provides a force that urges the linear motion member in one direction toward the rotary member
Data Source
AI summary
An angle adjuster for nuclear magnetic resonance (NMR) includes a linear motion member composed of a shaft and a support member, a rotary member, a conversion mechanism, and a spring. The linear motion member is a member that serves to change, in an NMR probe device, an angle of a sample tube by a linear motion. The rotary member is rotated by a motor. The conversion mechanism converts a rotary motion of the rotary member into a linear motion of the linear motion member. The spring provides, at a portion where the linear motion member and the rotary member are in engagement with each other, a force that urges the linear motion member in one direction toward the rotary member.