Backpack Blower Grip Geometry for Flexible Hand Positioning
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Solution Overview
Problem
Conventional backpack-type air blowing machines with fixed grips are not adaptable to operators of varying body sizes and engine displacements, leading to discomfort and fatigue due to suboptimal grip positioning and increased load with varying engine output powers.
Innovation Solution
A grip design featuring a base section, a vertical grip section with a sandwichable proximal end, and a lateral grip section that extends backward and outward, allowing for adjustable attachment and reduced hand strain through varied grasping forms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common linear grip is used for both small and large displacement engines, then device complexity is reduced, but operator comfort and control precision deteriorate due to suboptimal grip positioning and increased load
Solution Approach 1:
The grip is designed with a curved shape that dynamically adapts to the operator's hand position, allowing the grip angle to change according to the operator's posture and the engine's output power. This enables a single grip design to accommodate both small and large displacement engines while maintaining operator comfort and control precision.
Solution Approach 2:
The grip's curved geometry provides variable inclination angles relative to the air blowing pipe axis, allowing the optimal grip angle to be adjusted based on the engine's output power characteristics. This parameter variation enables the same grip to work effectively with different engine displacements without requiring multiple grip designs.
2Manufacturing precision
If the grip position is fixed relative to the air blowing pipe, then manufacturing precision is improved, but adaptability deteriorates for operators of varying body sizes and engine displacements
Solution Approach 1:
The curved grip design allows the effective grip position to dynamically adjust based on the operator's hand placement and body size. While the grip's physical attachment point remains fixed for manufacturing simplicity, the functional grip position adapts to different operators and engine types through its curved geometry.
Solution Approach 2:
The curved grip serves multiple functions: it provides a fixed attachment point for precise manufacturing while simultaneously adapting to various operator hand sizes and positions. This universal design allows the same grip structure to effectively serve both small and large displacement engines with different operators.
3Device complexity
If the grip extends straight upward from the air blowing pipe, then structural simplicity is maintained, but operational flexibility deteriorates for different working conditions and body sizes
Solution Approach 1:
The curved grip introduces dynamic adaptability to the otherwise simple structure. The curvature allows the grip to naturally adjust to different hand positions and angles, providing operational flexibility for various working conditions while maintaining relatively simple manufacturing processes.
Solution Approach 2:
Instead of extending the grip in a single straight line upward from the air blowing pipe, the curved design adds a second dimensional aspect to the grip's orientation. This curvature in the vertical plane provides additional grasping angles and positions, enhancing operational flexibility without significantly complicating the overall structure.
Data Source
AI summary
A grip for a backpack-type air blowing machine which performs a work by using air discharged from a distal end of an air blowing pipe that is coupled to a blower body driven by a power source while the air blowing pipe is manipulated by an operator with the power source and the blower body being carried on a back of the operator. The grip comprises a base section that constitutes an attachment section to the air blowing pipe, a vertical grip section that is provided with a proximal end portion provided continuously to the base section, and that extends in a direction away from the air blowing pipe, and a lateral grip section that extends backward along the air blowing pipe from a free end of the vertical grip section. The lateral grip section is located adjacent to a back of a hand of the operator holding the air blowing pipe.