Glue Gun Pivot Axis Positioning for Ergonomic Force Reduction
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Solution Overview
Problem
Conventional glue guns cause operator fatigue due to the need for prolonged and repeated actuation of the operating lever, leading to discomfort and reduced efficiency during use.
Innovation Solution
The glue gun design features a rotation axis that intersects or is positioned away from the guide track of the hot melt adhesive, allowing for a longer lever action and improved ergonomics, reducing the force required for operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rotation axis is positioned close to the guide track for compact design, then device complexity is reduced, but operator fatigue increases due to shorter lever arm
Solution Approach 1:
The patent positions the rotation axis in a different spatial dimension relative to the guide track - specifically above the guide track rather than adjacent to it. This dimensional relocation allows the actuating lever to achieve a longer effective length without increasing the lateral footprint of the device, thereby reducing operator fatigue while maintaining compact overall dimensions.
2Ease of operation
If a longer actuating lever is used to reduce operating force, then ease of operation improves, but the rotation axis may block the guide track for hot melt adhesive
Solution Approach 1:
By positioning the rotation axis above the guide track rather than adjacent to it, the patent creates sufficient vertical clearance for the hot melt adhesive to pass freely through the guide track. This spatial arrangement allows the actuating lever to extend sufficiently for comfortable operation without interfering with the adhesive flow path.
Solution Approach 2:
The patent divides the device into distinct functional zones: the rotation axis and actuating lever mechanism are positioned in the upper region, while the guide track for hot melt adhesive occupies the lower region. This spatial segmentation ensures that the operational components do not interfere with the material flow path.
3Ease of operation
If the rotation axis is positioned away from the guide track to improve ergonomics, then ease of operation improves, but the lever length increases potentially affecting device compactness
Solution Approach 1:
The patent utilizes the vertical dimension by positioning the rotation axis above the guide track, allowing the actuating lever to achieve optimal length for ergonomics without increasing the lateral footprint of the device. This vertical arrangement enables long lever arms while maintaining compact horizontal dimensions.
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 design significantly reduces operator fatigue by minimizing the force needed to actuate the glue gun, achieving a potential force savings of up to 50% compared to conventional models.
Implementation Method 1
a heating device (13) for liquefying at least part of a hot melt adhesive (14)
Data Source
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AI summary
In a glue gun with a heating device (13) for liquefying at least a portion of a hot melt adhesive (14), a feed device (15) for supplying the hot melt adhesive (14) to the heating device (13), an operating device (16) for actuating the feed device (15), wherein the operating device (16) has an actuating lever (21) which is pivotably mounted about a pivot axis (22), and the pivot axis (22) is oriented transversely or perpendicularly to the longitudinal direction of a guide track (23) for the hot melt adhesive (14), the ease of use and/or ergonomics can be improved by arranging the pivot axis (22) in the area of the guide track (23) of the hot melt adhesive (14) or in an area away from a trigger (28) of the operating device (16) next to the guide track (23).