Miter Saw Bevel Stop Toggle and Laser Mounting
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Solution Overview
Problem
Power miter saws face challenges with difficult bevel lock engagement, complex positive stop arrangements, and obstructed laser alignment, which complicate user operation and increase manufacturing costs. Additionally, existing extendable work surfaces are cumbersome for transport and storage.
Innovation Solution
A miter saw design featuring a bevel lock with a rotor and brake pads for easy angle adjustment, a simplified multi-position bevel stop toggle, and an extendable work surface with slideable guide rods that retract for compact storage, along with a laser alignment system mounted on the dust chute to avoid obstructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional bevel lock with separate override arrangements is used, then the support assembly can be stopped at multiple bevel positions, but the arrangement becomes complex with multiple components in multiple positions
Solution Approach 1:
The patent combines multiple separate override arrangements into a single integrated bevel stop toggle (280) that can stop the support assembly at multiple bevel positions (33.9 degrees, 45 degrees, and greater than 45 degrees). This single toggle replaces what would traditionally require multiple separate components and positions, thereby reducing device complexity while maintaining multi-position adaptability.
2Ease of operation
If a laser alignment device is mounted on the miter saw, then alignment guidance is provided, but the laser beam may be obstructed or shifted when the blade is not in cutting position
Solution Approach 1:
The patent extracts the laser alignment device from the main body of the miter saw and relocates it to the dust chute (132). This positioning removes the laser source from areas where it would be obstructed by the blade or other components during non-cutting positions. The dust chute location provides a clear line of sight for the laser beam to project onto the workpiece throughout the full range of blade motion, eliminating obstruction issues while maintaining alignment guidance functionality.
3Ease of operation
If the work surface is made wide to hold work pieces, then work piece support capability is improved, but the miter saw becomes large for transport and storage
Solution Approach 1:
The patent implements an extendable work surface (130) that can dynamically change its configuration. The work surface can be extended laterally to provide a wide support area when needed for cutting operations, and retracted to a compact position when the saw needs to be transported or stored. This dynamic adjustability allows the same structure to satisfy both requirements: providing adequate work piece support capability during operation while minimizing footprint during storage and transport.
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
The design enhances user convenience by simplifying bevel lock engagement, reduces manufacturing costs with a single control for positive stops, and provides a compact, obstruction-free laser alignment and extendable work surface for improved operational efficiency and storage.
Implementation Method 1
The brake pads are positioned to engage opposite sides of the rotor and the brake pads engage the rotor to prevent pivoting of the bevel support
Data Source
AI summary
A miter saw comprises a base and a bevel support pivotable with respect to the base. A cutting blade is supported by the bevel support and moveable between a plurality of cutting positions. The miter saw further comprises a bevel stop member moveably connected to the base between a plurality of stop positions. The plurality of stop positions include a first stop position where the bevel stop member is configured to stop the bevel support at a bevel angle of less than forty-five degrees. The plurality of stop positions also include a second stop position where the bevel stop member is configured to stop the bevel support at a bevel angle of about forty-five degrees. Furthermore, the plurality of stop positions include a third stop position where the bevel stop member is configured to allow the bevel support to pivot to a bevel angle of greater than forty-five degrees.