Safety Switch Auxiliary Unlocking Mechanism
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Solution Overview
Problem
Existing safety switch arrangements in machine safety technology require high structural complexity and may fail to provide a reliable means for manual release during power failures, limiting access to hazardous areas.
Innovation Solution
A safety switch arrangement with a mechanically actuated auxiliary unlocking unit, utilizing a transmission element with a film hinge and push rod, allows for manual release of the actuator from a locked position, decoupling the actuating element's position from the blocking element's, and incorporating a spring element for overload protection and latching for haptic feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a safety switch arrangement uses a mechanically actuated auxiliary unlocking unit with a transmission element, then the device complexity is reduced and space efficiency is improved, but the reliability of manual release during power failures must be ensured
Solution Approach 1:
The transmission element is divided into functionally independent segments: a push rod segment for linear actuation and a film hinge segment for rotational movement. This segmentation allows each segment to be optimized for its specific function, reducing overall complexity while ensuring reliable manual release through distributed functionality.
Solution Approach 2:
The film hinge segment is designed to be dynamically adaptable, capable of winding up and unwinding on the shaft of the actuating element. This dynamic configuration allows the transmission element to transform rotational input into linear output while accommodating varying operational conditions, ensuring reliability without adding complex mechanical structures.
2Volume of moving object
If the transmission element uses a film hinge that can be wound up and down, then the space efficiency is improved and the mechanism becomes more compact, but the manufacturing precision requirements increase
Solution Approach 1:
The transmission element incorporates a film hinge segment that utilizes flexible thin film structures instead of rigid mechanical components. This approach significantly reduces the volume and space requirements of the auxiliary unlocking unit while the film's inherent elasticity compensates for manufacturing tolerances, reducing the impact of precision variations.
Solution Approach 2:
The transmission element is designed as a composite structure combining the push rod segment (for structural rigidity) and the film hinge segment (for flexible movement). This composite approach allows each material to be optimized for its specific function, reducing overall manufacturing precision requirements while maintaining compact dimensions.
3Ease of operation
If the actuating element is decoupled from the blocking element via a transmission element, then the ease of operation is improved and manual release becomes simpler, but the device complexity increases
Solution Approach 1:
The transmission element serves as an intermediary mechanism between the actuating element and the blocking element. It translates the simple rotational input from the actuating element into the linear movement required to release the blocking element, making manual operation intuitive and simple while keeping the transmission structure itself relatively simple through the use of segmented design.
Solution Approach 2:
The film hinge segment of the transmission element is designed to automatically wind up and unwound on the shaft of the actuating element during operation. This self-servicing mechanism eliminates the need for additional complex control systems or multiple transmission components, simplifying the overall device structure while improving ease of operation.
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 solution provides a low-complexity, space-efficient mechanism for manual release during power failures, ensuring safe access to hazardous areas and preventing damage from excessive forces.
Implementation Method 1
A segment of the transmission element forms a film hinge, which can be wound up or down on a shaft of the actuating element
Implementation Method 2
incorporating a spring element for overload protection
Data Source
Figure 1
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AI summary
The invention relates to a safety switch arrangement (1) comprising a safety switch (2) and an associated actuator (3). A holding unit is also provided, by means of which the actuator (3) is held in a locked position. The safety switch (2) has an auxiliary release unit (14) which includes a mechanically actuated actuating element (15). Actuation of the actuating element (15) is converted into an actuating movement for the holding unit only by means of a transmission element (16).