Handheld Blower Eyelet Design for Harness Balance and Operator Comfort

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Solution Overview

Problem

Outdoor power equipment, such as handheld blowers, often suffer from imbalance and ergonomics issues due to heavy batteries, leading to operator discomfort and fatigue during use and transport.

Innovation Solution

Incorporating a strategically positioned eyelet on the blower housing allows for the attachment of a belt or harness, which supports the device at its balance point, enhancing ergonomics and balance without adding significant components or complexity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-generated harmful factors

If a battery is added to power the blower, then emissions are reduced and mobility is improved, but the device becomes imbalanced and operator comfort deteriorates

Engineering Contradiction:

ImproveemissionsVSAvoidoperator comfort

Core Design Contradiction:

Object-generated harmful factorsVSEase of operation

Solution Approach 1:

The patent positions the battery as a counterweight component to balance the blower device. The battery is strategically located to offset the weight of other components (motor, fan assembly, housing), creating a balanced center of gravity that improves ergonomics and reduces operator fatigue while maintaining the emission-reduction benefit of electric power

Inventive Principle:

Principle #8Anti-weight (Counterweight)

2Adaptability or versatility

If the blower is designed for handheld operation, then mobility is improved, but operator fatigue increases due to weight distribution issues

Engineering Contradiction:

ImprovemobilityVSAvoidoperator fatigue

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The battery serves as a counterweight strategically positioned to balance the handheld blower. This creates an optimal center of gravity that reduces the torque and strain on the operator's arm and shoulder, allowing prolonged handheld operation with minimal fatigue while preserving the mobility advantage

Inventive Principle:

Principle #8Anti-weight (Counterweight)

3Strength

If robust construction is used to handle difficult work, then device strength is improved, but device weight increases and mobility decreases

Engineering Contradiction:

Improvedevice strengthVSAvoidmobility

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The patent employs composite construction methods, likely combining materials of different densities and strengths. The housing and structural components use materials that provide necessary strength and durability for handling difficult work while minimizing weight, and the battery placement optimizes the overall weight distribution to maintain mobility

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS10433496B2Blower comprising an eyelet

Publication Date: 2019.10.08 HUSQVARNA AB

AI summary

A blower (100) may include a housing (110), a blower tube (150), a fan assembly (160) and an eyelet (190). The housing (110) may include a handle portion (144) defining a handle aperture (145). The blower tube (150) may extend forward from the housing (110) and define a tube axis (152). The fan assembly (160) may be operably coupled to the blower tube (150) to force air through the blower tube (150) responsive to operation of a motor (120). The eyelet (190) may be disposed on a side portion of the housing (110) proximate to the handle aperture (145).