Detachable Heat Insulating Cover for Micrometer Frame

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Solution Overview

Problem

Conventional micrometers fail to achieve sufficient heat-insulating effects during high-precision measurements, leading to thermal expansion issues that affect measurement accuracy, and thicker resin covers compromise operability when used with a stand or one hand.

Innovation Solution

A detachable heat insulating cover for micrometers, featuring a U-shaped design with elastic components and hooks that sandwich the frame, providing effective heat insulation while allowing for easy attachment and detachment, ensuring operability and precision.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If thicker resin covering the frame is used to improve heat-insulating effect, then heat insulation performance is improved, but the frame becomes extremely thick, impairing operability of the micrometer

Engineering Contradiction:
Improveheat insulation performanceVSAvoidoperability
Core Design Contradiction:
Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The heat insulating cover is divided into a first cover portion and a second cover portion that can be engaged with and detached from the frame. This segmentation allows the heat insulation function to be added without permanently increasing the frame thickness, maintaining operability while providing thermal protection when needed.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The heat insulating cover is designed to be detachable and可调整 (adjustable), transforming from a static thick frame structure to a dynamic system where insulation can be added or removed based on operational needs. The elastic body enables flexible attachment and detachment, allowing the micrometer to adapt between measurement modes.

Inventive Principle:
Principle #15Dynamics

2Measurement precision

If resin covering the frame is used to suppress thermal expansion, then measurement accuracy is improved, but the heat-insulating effect is insufficient for high-precision measurement

Engineering Contradiction:
Improvemeasurement accuracyVSAvoidheat-insulating effect
Core Design Contradiction:
Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The heat insulating cover is made of resin material that combines heat insulation properties with the existing frame structure. This composite approach enhances the heat-insulating effect beyond what the original frame provides, enabling high-precision measurement by effectively blocking thermal transmission from hands to the measurement components.

Inventive Principle:
Principle #40Composite materials

3Ease of operation

If the heat insulating cover is made detachable, then operability is maintained, but the structure becomes more complex

Engineering Contradiction:
ImproveoperabilityVSAvoidstructure complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The heat insulation function is extracted as a separate detachable cover rather than being integrated into the frame structure. This allows the core frame to remain simple and unchanged, while the insulation function is provided by an independent component that can be added or removed based on measurement requirements.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The elastic body acts as an intermediary mechanism that simplifies the connection between the cover portions and the frame. Instead of complex fastening systems, the elastic body provides automatic engagement and retention, reducing structural complexity while enabling easy attachment and detachment.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 heat insulating cover effectively reduces thermal expansion impacts on measurement accuracy, enabling high-precision measurements without impairing operability, even when used with a stand or one hand, and can be adjusted for varying heat-insulating needs.

Implementation Method 1

an elastic body that biases the first cover portion to the first face and the second cover portion to the second face

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

heat insulating cover for micrometer capable of reducing influences on a measurement result by temperatures

Methodology Applied
Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS8245413B2Heat insulating cover and micrometer
Publication Date: 2012.08.21 MITUTOYO CORP
  • US8245413B2 patent drawing
  • US8245413B2 patent drawing
  • US8245413B2 patent drawing

AI summary

Disclosed is a micrometer with an improved a heat-insulating property. A micrometer 10 with a U-shaped frame 20 supporting an anvil 12 and a spindle 14 at tip end portions thereof so that the anvil 12 and the spindle 14 are coaxially opposed to each other is provided with a heat insulating cover 50. The heat insulating cover 50 is shaped to accommodate a bottom portion of the frame 20, and is detachable with respect to the frame 20. The heat insulating cover 50 covers a bottom face 22 of the frame 20 while supporting the bottom portion of the frame 20 by sandwiching from both sides of the frame 20.