Single Molded Housing for Portable Measuring Instruments

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Solution Overview

Problem

Portable measuring instruments, such as sliding calipers, face challenges in maintaining watertightness and simplicity due to complex constructions with multiple parts and assembly steps, particularly when exposed to liquids, dust, and shocks in industrial environments, and struggle with secure handling and resistance to solvents and lubricants.

Innovation Solution

A portable electronic measuring instrument with a single, transparent, molded housing that integrates a contactless sensor and display, using a printed circuit board to secure components and eliminate access points for liquids, and incorporates an auxiliary electronic circuit for wireless communication and data storage without additional openings, featuring a resilient and shock-resistant design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple separate components (housing, display window, connector, buttons) are used to achieve watertightness and functionality, then protection against liquids and dust is improved, but device complexity and number of assembly steps increase

Engineering Contradiction:

Improveprotection against liquids and dustVSAvoidnumber of parts and assembly steps

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the housing, display window, button openings, and connector protection into a single molded transparent housing. This single component integrates multiple functions that traditionally required separate parts (protective housing, transparent window, button seals, connector protection), thereby reducing the number of parts and assembly steps while maintaining IP67 protection against liquids and dust.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The transparent housing serves multiple functions simultaneously: it provides structural protection, maintains watertightness, enables display visibility, protects buttons and connectors, and resists solvents and lubricants. This multi-functional design eliminates the need for separate components for each function, reducing complexity while improving reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Illumination intensity

If traditional transparent windows made of thin resin plates are used, then display readability is improved, but resistance to shocks and deformations deteriorates

Engineering Contradiction:

Improvedisplay readabilityVSAvoidresistance to shocks and deformations

Core Design Contradiction:

Illumination intensityVSStrength

Solution Approach 1:

The patent uses a transparent housing made of molded material that combines the optical properties needed for display readability with the structural strength required to resist shocks and deformations. This integrated transparent housing eliminates the weakness of thin resin plates while maintaining display visibility, as the molded structure provides inherent strength without compromising transparency.

Inventive Principle:

Principle #40Composite materials

3Adaptability or versatility

If wired data interfaces (RS232, USB) are used for data transmission, then compatibility with equipment and computers is improved, but vulnerability to liquid and dust intrusion increases

Engineering Contradiction:

Improvecompatibility with equipmentVSAvoidprotection against liquid and dust intrusion

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent removes the physical connector opening from the housing by using a wireless communication interface. This extraction of the vulnerable wired connector eliminates the access point for liquids and dust while maintaining data transmission capability through wireless means, thus preserving compatibility without compromising protection.

Inventive Principle:

Principle #2Taking out (Extraction)

4Reliability

If multiple separate components with joints and glued connections are used, then protection against foreign objects is improved, but vulnerability to solvent aggression and shock deterioration increases

Engineering Contradiction:

Improveprotection against foreign objectsVSAvoidresistance to solvents and shocks

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent combines multiple separate components with joints and glued connections into a single molded housing structure. This integration eliminates the vulnerable interfaces where joints and adhesives would be exposed to solvent aggression and shock, as there are no separate mating surfaces or bonding areas in the monolithic structure.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS9207056B2Portable instrument for measuring dimensions

Publication Date: 2015.12.08 TESA SA(CH)

AI summary

Portable instrument for measuring dimensions, comprising a scale, a position sensor capable of being displaced relative to the scale and a watertight housing defining an internal volume comprising the display, the electronic reading circuit and a power source. Additional functional layers, for example an over-molded elastomer thermoplastic layer and a metallic plate, protect the instrument and add to it specific tactile and visual qualities.