Ergonomic Paddle Trigger for Reverse Fastener Orientation
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Solution Overview
Problem
Existing fastening tools, such as nailers, lack ergonomic flexibility when operated in reverse orientations, causing user discomfort due to the location and configuration of the trigger member, which restricts operational freedom and flexibility.
Innovation Solution
A paddle trigger with a lever or paddle portion is integrated into the fastening tool, allowing users to hold the tool backwards and depress the trigger with one or multiple fingers, providing ergonomic control and comfort through a contoured design that complements the handle shape, enabling activation from various hand positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional trigger is used in fastening tools, then the trigger can be activated when the tool is held in a standard orientation, but the trigger becomes difficult to reach and operate when the tool is turned backwards or in reverse position
Solution Approach 1:
The trigger assembly is designed to function effectively in multiple tool orientations. The curved trigger body with its extended distal free end allows the trigger to be activated whether the tool is held in a standard orientation or turned backwards, making the trigger mechanism universal across different operational positions and orientations.
Solution Approach 2:
The trigger design extends in the longitudinal direction of the handle with a curved body that has both lateral and longitudinal dimensions. This multi-dimensional configuration allows fingers to access and activate the trigger from various positions, whether the tool is held conventionally or in reverse, adding operational dimensions beyond the traditional trigger layout.
2Adaptability or versatility
If the trigger is positioned in a conventional location, then the tool structure remains simple, but the user experience deteriorates when operating the tool in reverse orientations
Solution Approach 1:
The trigger assembly incorporates a curved body with undulating curvature that allows dynamic adaptation to different hand positions and tool orientations. This dynamic geometric configuration enables the trigger to be effectively activated whether the user's hand is positioned with the thumb adjacent to the housing or adjacent to the base, providing operational freedom without excessive structural complexity.
3Ease of operation
If the trigger has a standard shape, then manufacturing is simplified, but the ergonomic comfort is reduced when the tool is held backwards
Solution Approach 1:
The trigger body features a curved configuration with undulating curvature along its length, replacing a straight or angular design. This curved geometry conforms better to the natural positioning of fingers when the tool is held in various orientations, including reverse positions, enhancing ergonomic comfort while remaining manufacturable through standard forming processes.
Data Source
AI summary
A fastening tool including a housing having a handle portion, a base for releasably mounting a power source, a nosepiece for driving fasteners into a workpiece, a magazine for feeding successive fasteners into the nosepiece, and a trigger. The trigger is configured to activate a trigger switch and initiate a fastener driving sequence. The trigger has a proximal end pivotably connected to a handle body and a distal free end adjacent to the base. The distal free end of the trigger has a curved body that extends substantially parallel to the magazine.