Saw Blade Guard Lateral Pivot for Easy Replacement
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Solution Overview
Problem
Existing saw blade guard assemblies are inconvenient for blade replacement and cleaning, as the outer guard portion cannot be fully opened to expose the blade, and are not compatible with protruding laser devices.
Innovation Solution
A guard assembly with an outer guard portion pivotally connected to an inner guard portion about a pivot axis perpendicular to the saw blade's rotating axis, allowing lateral opening to fully expose the saw blade for easy replacement and cleaning, and accommodating a laser device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the outer guard portion is pivotally connected to the inner guard portion about an axis parallel to the rotating axis (prior art), then the guard assembly provides protective coverage, but the outer guard portion cannot be fully opened to completely expose the saw blade for replacement and cleaning
Solution Approach 1:
The patent changes the pivot axis orientation from parallel to the rotating axis (prior art) to perpendicular to the rotating axis (new invention). This dimensional change allows the outer guard portion to open laterally in a different direction, completely exposing the saw blade for easy replacement and cleaning, while maintaining the protective function when closed.
2Ease of operation
If the outer guard portion is designed to rotate upwards to expose the fixing flange (prior art), then blade replacement is facilitated, but the saw blade cannot be completely exposed and the inner side of the guard assembly is inconvenient to clean
Solution Approach 1:
By changing the pivot axis to be perpendicular to the rotating axis, the outer guard portion opens laterally instead of rotating upwards. This allows complete exposure of the saw blade and the inner side of the guard assembly, making both blade replacement and cleaning convenient operations.
3Adaptability or versatility
If a protruding laser device is disposed at the front of the inner guard portion, then the guard assembly provides additional functionality, but the outer guard portion is stopped by the laser device from rotating further
Solution Approach 1:
The lateral opening motion (perpendicular to rotating axis) provides a different movement path compared to the upward rotation (parallel to rotating axis). This allows the outer guard portion to open fully without interfering with protruding accessories like laser devices mounted on the inner guard portion, maintaining both versatility and operational ease.
Data Source
AI summary
The present invention discloses a guard assembly for a saw blade, which includes an inner guard portion and an outer guard portion. The inner and outer guard portions define a containing space therebetween. A circular saw blade includes two parallel sides and a rotating axis perpendicular to the two sides. At least a portion of the saw blade is located within the containing space. The outer guard portion is pivotally connected with the inner guard portion about a pivotal axis which is substantially parallel to each side of the blade. The improved guard assembly, which can be opened laterally, is convenient to change the saw blade and to clean the inner of the guard.