Oscillating Tool Accessory With C-Shaped Reach Behind Obstructions
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Solution Overview
Problem
Oscillating power tools lack accessories that can effectively cut workpieces located behind obstructions due to design limitations, and existing accessories often require separate tools for attachment, complicating versatility and ease of use.
Innovation Solution
The development of oscillating power tool accessories featuring a C-shaped intermediate portion that allows the working end to cut behind obstructions, combined with a universal attachment mechanism that can be reversibly coupled to the power tool, enabling efficient cutting and easy attachment without additional tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional straight accessories are used, then the attachment mechanism is simple, but the accessory cannot cut workpieces located behind obstructions
Solution Approach 1:
The accessory employs a curved C-shaped intermediate portion instead of a straight configuration. This curvature allows the working end to extend around obstructions and access workpieces that would otherwise be inaccessible, directly resolving the contradiction between adaptability and simplicity by using geometric curvature to achieve versatility without complex mechanisms
2Ease of operation
If a tool-free attachment mechanism is implemented, then ease of operation improves, but the attachment portion requires additional design features
Solution Approach 1:
The attachment portion is designed to be self-retaining through its geometry, allowing the accessory to attach to and detach from the oscillating tool without requiring additional tools or complex fastening mechanisms. The asymmetric design with the C-shaped intermediate portion creates a snap-fit or friction-fit connection that secures the accessory during operation but allows easy removal when needed
Solution Approach 2:
The attachment portion features an asymmetric design where the C-shaped intermediate portion creates unequal engagement surfaces. This asymmetry enables tool-free attachment by allowing the accessory to engage in one orientation while preventing engagement in other orientations, providing secure attachment without requiring additional fastening components
3Adaptability or versatility
If the accessory is designed for reversible attachment, then versatility improves, but manufacturing precision requirements increase
Solution Approach 1:
The attachment portion is designed with universal compatibility features that allow the same accessory to be attached in multiple orientations (reversible attachment). The C-shaped intermediate portion and radial openings are configured to work with the oscillating tool's attachment mechanism regardless of which way the accessory is mounted, enabling the same component to serve multiple functional orientations without requiring precision alignment features
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
An accessory (200a) includes an attachment portion (202a) with a central opening configured to be coupled to an oscillating power tool and defining a first axis generally parallel to a power tool axis. An intermediate portion (204a) with a first side edge (226a) and a second side edge (228a) has a proximal end portion (206a) coupled to the attachment portion (202a) and extends away from the attachment portion to a distal end portion (208a). A working portion (210a) is coupled to and extends away from a distal end portion (208a) at an angle to the intermediate portion (204a) and at an angle to the first axis. The working end portion (210a) has a non-cutting third side edge continuous with the first side edge and a cutting fourth side edge (230a) continuous with the second side edge (228a). The intermediate portion (204a) wraps at least partially around an obstruction located along the first axis so the working portion (210a) can cut a workpiece located behind the obstruction.