Staple Gun Automatic Depth Adjustment Cable Protection
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Solution Overview
Problem
Existing powered staple guns lack control over staple depth when securing electric cables, risking damage to cable insulation and potential accidental firing into cables.
Innovation Solution
A powered staple gun with a reciprocating cable guide for centering, a spacer for depth adjustment, and a cable guard to prevent staple tips from piercing insulation, along with a sensor probe to detect current and an override button for safety features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrically powered staple guns are used to drive staples into surfaces, then stapling efficiency is improved, but control over staple depth is lost and risk of damaging cable insulation increases
Solution Approach 1:
The patent applies parameter changes by using a spring-loaded mechanism that automatically adjusts the staple driving force and depth based on the resistance encountered. The spring compression distance varies with cable thickness and surface hardness, dynamically changing the stapling parameters to achieve consistent depth control across different conditions while maintaining high-speed automated operation.
Solution Approach 2:
The patent implements feedback through a depth sensing mechanism that detects when the staple has reached the appropriate penetration depth. This feedback system automatically stops the stapling action at the correct depth, preventing over-penetration that could damage cable insulation, while still allowing powered high-speed stapling operation.
2Speed
If powered staple guns are used, then stapling speed is improved, but accidental firing into cables becomes more likely
Solution Approach 1:
The patent applies preliminary action through a positioning mechanism that requires the installer to correctly position the gun over the cable before the stapling mechanism is activated. A guide rail or positioning stop is provided that must be aligned with the cable, ensuring proper positioning occurs before the powered stapling action takes place, thereby preventing accidental firing.
Solution Approach 2:
The patent uses an intermediary positioning mechanism or guide that mediates between the installer's positioning action and the powered stapling mechanism. This intermediary component physically prevents the trigger from being activated unless the gun is correctly positioned over the cable, adding a safety layer that maintains high-speed operation while preventing accidental firing.
3Strength
If deeper staples are driven to secure cables firmly, then cable securing strength is improved, but risk of piercing insulation and crushing cable increases
Solution Approach 1:
The patent applies parameter changes by using a spring-loaded mechanism that automatically adjusts the staple driving force and depth based on the resistance encountered. The spring compression distance varies with cable thickness and surface hardness, dynamically changing the stapling parameters to achieve consistent depth control across different conditions while maintaining high-speed automated operation.
Solution Approach 2:
The patent implements feedback through a depth sensing mechanism that detects when the staple has reached the appropriate penetration depth. This feedback system automatically stops the stapling action at the correct depth, preventing over-penetration that could damage cable insulation, while still allowing powered high-speed stapling operation.
Data Source
AI summary
A staple gun and a method of using the same. A stapling mechanism in the housing is activated to deliver a staple through an aperture in a housing wall and drive the staple into a surface around a stack of one or more electric cables. The gun includes a reciprocating cable guide for centering the gun on the stack of cables and closing a safety switch to permit the gun's trigger to be activated. A spacer extending outwardly from the housing wall rests on the upper surface of the cable stack. The spacer and a bumper that engages a hammer of the stapling mechanism provide for automatic depth adjustment when driving the staple into the surface. A reciprocating cable guard extending outwardly from the housing wall is positioned between the stack of cables and the staple to aid in preventing the staple from piercing the cable.