Backpack Blower Layout for Reduced Arm Fatigue
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Solution Overview
Problem
Conventional electric-motor-driven blow operation devices cause significant arm fatigue due to the heavy weight of the blower and motor, which is typically held by one hand, increasing the burden on the operator, especially when trying to efficiently blow and gather debris from both sides.
Innovation Solution
A backpack-type frame with a battery and blower body attached along the back contact surface, allowing the blower and battery to be carried on the back, reducing the weight burden on the operator and distributing the reaction force across the body, thus minimizing arm fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the blower portion including the heavy electric motor is supported by one arm while holding with hand, then the device can be operated with one hand, but the burden of heavy weight on the operator increases and arm fatigue increases
Solution Approach 1:
The patent transitions from one-dimensional hand-held support to three-dimensional backpack support, distributing the weight across the operator's back and both shoulders. The blower body is mounted on a backpack frame with the motor axis aligned along the back contact surface, effectively moving the weight burden from the arms to the torso.
2Productivity
If the blower portion is held by both arms to blow air from two directions, then efficient blowing-and-gathering operation can be performed, but the burden on the arms of the operator further increases
Solution Approach 1:
The patent enables two-directional blowing capability while maintaining reduced arm burden by mounting the blower body on a backpack frame. The motor axis is oriented along the back contact surface, allowing the operator to manipulate the blower tube with one or both hands while the primary weight support comes from the backpack structure rather than the arms.
3Device complexity
If the battery and blower body are made handheld, then the device structure can be simplified, but the heavy weight cannot be avoided and causes operator burden
Solution Approach 1:
The patent segments the device into distinct functional modules: the backpack frame structure, the battery pack, and the blower body with motor. These modules are independently designed and then integrated, with the blower body mounted on the frame and the battery positioned separately, allowing for modular assembly and maintenance while distributing weight effectively.
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
This configuration significantly reduces the weight burden on the operator and minimizes arm fatigue, enabling more efficient and comfortable operation by distributing the weight and reaction force across the body, improving operational efficiency and reducing fatigue during blowing and gathering tasks.
Implementation Method 1
a blower body (3) having an electric motor (5) to which power is fed from the battery (2) and having an axial fan (6) driven by the electric motor (5)
Data Source
AI summary
To reduce fatigue in the arm of an operator of a blow operation device driven by an electric motor and to realize a blow operation of blowing and gathering generated compressed air from both the right and left with a small operational burden. A blow operation device includes a backpack type frame, a battery attached to the frame, a blower body having an electric motor to which power is fed from the battery and having an axial fan driven by the electric motor, and a blower tube connected to a blow side of the blower body, the frame including a back contact surface, and the blower body being attached to the frame such that axial directions of the electric motor and the axial fan are along the back contact surface.