Sequential Fastening Stop Unit for Electrical Tool Alignment
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Solution Overview
Problem
Existing stop units for guiding workpieces on electrical tools, such as saw units, are not simple to operate and may compromise the alignment of the stop unit relative to the tool, leading to unreliable operation.
Innovation Solution
A stop unit with an operating element that sequentially brings the fastening device into a first fastening state, where only the first fastening mechanism is engaged, and then into a second fastening state, where both fastening mechanisms are engaged, ensuring a predefined alignment relative to the tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If both fastening mechanisms are coupled via a connection rod and simultaneously actuated by a single operating lever, then the operation is simplified, but the alignment of the stop unit relative to the tool may be compromised
Solution Approach 1:
The fastening process is segmented into two distinct states: a first fastening state where only the first fastening mechanism is engaged, and a second fastening state where both mechanisms are engaged. This segmentation allows the alignment to be established during the first state before the second mechanism is activated, preventing alignment compromise while maintaining simple operation through a single operating lever.
Solution Approach 2:
The first fastening mechanism performs a preliminary fastening action that establishes the correct alignment of the stop unit relative to the tool. Only after this preliminary alignment is achieved is the second fastening mechanism activated to provide additional securing. This preliminary action ensures that when both mechanisms are engaged, the alignment is already correct and cannot be compromised by the second mechanism.
2Device complexity
If both fastening mechanisms are actuated simultaneously, then the fastening process is simplified, but the risk of compromising stop unit alignment increases
Solution Approach 1:
The coupling element is designed to dynamically transition between different coupling states. During the first fastening state, the coupling element remains uncoupled from the second fastening mechanism, allowing independent operation and alignment establishment. During the second fastening state, the coupling element engages to connect both mechanisms. This dynamic behavior enables the system to maintain simplicity while ensuring alignment reliability through sequential engagement.
Data Source
AI summary
A stop unit including a stop body extending in the longitudinal direction; and a fastening device having a first fastening mechanism and a second fastening mechanism for fastening the stop unit to an electric tool and which are arranged spaced apart from one another in the longitudinal direction. The stop unit further includes an operating element, which is coupled to the first fastening mechanism and the second fastening mechanism and can be made to perform a first operating-element movement, by means of which the fastening device can be sequentially shifted first into a first fastening state and then into a second fastening state, in which in the first fastening state the first fastening mechanism is in its fastening position and the second fastening mechanism is in a release position, and in which in the second fastening state the first and the second fastening mechanism are in the relevant fastening position.