Dustproof Counter Device for Measuring Wheel

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Solution Overview

Problem

Conventional measuring wheels suffer from reduced accuracy and shortened service life due to dust entering the device through gaps, which accumulates on gears and interferes with their smooth operation.

Innovation Solution

A dustproof counter device for measuring wheels is designed with a base, counter, and pedal setting component, where a dustproof flange and cap prevent dust from entering the base space when the zeroing button is pressed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a zeroing button with a gap is used for convenient foot operation, then ease of operation is improved, but dust enters the base through the gap causing reduced measurement precision and reliability

Engineering Contradiction:

Improveconvenience of foot operationVSAvoidaccuracy of distance measurement

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

A pedal setting component is introduced as an intermediary between the user's foot and the zeroing button. This pedal transmits the foot pressure to reset the counter while preventing direct contact between the foot and the button gap, thereby blocking dust entry paths while maintaining operational convenience.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

A dustproof cap covers the zeroing button area, creating a flexible barrier that prevents dust from entering the base through the gap. The cap allows the zeroing function to work while sealing the opening against dust contamination.

Inventive Principle:

Principle #30Flexible shells and thin films

2Ease of operation

If a zeroing button with a gap is used for convenient foot operation, then ease of operation is improved, but service life is reduced due to dust accumulation on gears

Engineering Contradiction:

Improveconvenience of foot operationVSAvoidservice life of measuring wheel

Core Design Contradiction:

Ease of operationVSDuration of action of stationary object

Solution Approach 1:

The pedal setting component serves as a mediator that separates the operational interface from the internal mechanism. It allows the zeroing function to be activated conveniently while preventing dust-laden footwear from直接接触 the button and introducing dust into the base where gears are located.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The dustproof cap acts as a protective shell covering the zeroing button area. This shell prevents dust particles from entering the base through the gap during button operation, thereby protecting the internal gears from dust accumulation and extending the device's service life.

Inventive Principle:

Principle #30Flexible shells and thin films

3Ease of repair

If the base is opened for component access, then ease of repair is improved, but dust enters the base space reducing reliability

Engineering Contradiction:

Improveaccessibility of internal componentsVSAvoidconsistent operation of measuring wheel

Core Design Contradiction:

Ease of repairVSReliability

Solution Approach 1:

The dustproof cap provides a sealing cover over the component opening area. When installed, it prevents dust from entering the base space through the opening, thereby maintaining the reliability of internal components while still allowing access when removed for repair purposes.

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS12287193B2Dustproof counter device of measuring wheel

Publication Date: 2025.04.29 LAI YIN WU

AI summary

A dustproof counter device of a measuring wheel has a base, a counter, and a pedal setting component. The base has a component opening formed through a top of the base and a dustproof flange protruding from the base and surrounding the component opening. The counter is disposed in the base and has a zeroing button extending into the component opening of the base. The pedal setting component has a dustproof cap covering and surrounding the dustproof flange of the base, and abutting against the zeroing button. When the pedal setting component is pressed by a user's foot, dust is kept from dropping into the base by the dustproof cap.