Slim Grip Housing for Electric Working Machine
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Solution Overview
Problem
The existing electric working machines have a thick grip unit due to the placement of detection and presence sensors outside the region overlapping the support rod, which compromises the slimness of the grip housing and overall design.
Innovation Solution
The sensors are configured to at least partially overlap the support rod in a rear plan view, allowing for a slim grip housing and unit by eliminating the need for the support rod to penetrate through the grip housing, and the control unit is positioned to overlap the support rod, reducing the machine's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detection sensor and presence sensor are disposed outside the region overlapping the support rod in the rear plan view, then the sensors can be placed on the outer side of the support rod, but the grip housing becomes thick and the grip unit becomes thick
Solution Approach 1:
The patent changes the spatial arrangement of sensors from a configuration where they are entirely outside the support rod's projection area to a configuration where they can overlap with the support rod in the rear plan view. This dimensional repositioning allows sensors to be placed in the vertical direction without increasing grip housing thickness, resolving the contradiction between sensor functionality and grip unit slimness.
2Device complexity
If the support rod penetrates through the grip housing, then the structure is simplified, but the grip housing must be thick enough to accommodate the support rod and sensors separately
Solution Approach 1:
The patent merges the spatial occupation of the support rod and sensors by allowing their projections to overlap in the rear plan view. This combining of spatial zones eliminates the need for separate accommodation spaces, enabling the grip housing to be slim while maintaining both the support rod structure and sensor placement.
Data Source
AI summary
An electric working machine may include a support rod extending in a front-rear direction; a head unit attached to a front end of the support rod and including a front tool and a motor configured to drive the front tool; and a grip unit attached to a rear end of the support rod. The grip unit may include a grip housing configured to be gripped by an operator; a detection sensor attached to the grip housing and configured to detect an on/off operation for the motor by the operator; and a presence sensor attached to the grip housing and configured to detect a grip by the operator on the grip housing. The support rod may not penetrate through the grip housing. In a rear plan view of the electric working machine, at least one of the detection sensor and the presence sensor at least partially may overlap the support rod.