Safety Switch Push-Belt Release for Manual Emergency Unlocking
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Solution Overview
Problem
Existing safety switches for securing hazardous areas lack a simple yet reliable mechanism for emergency unlocking, particularly in scenarios like power failures, where mechanical actuation is necessary to ensure safe and efficient release from a locked position.
Innovation Solution
A safety switch with a mechanically actuated push belt unlocking unit that directly releases the blocking element from its locked position, utilizing a shear-resistant push belt that can follow complex trajectories and is constrained within a guide to ensure force transmission without buckling, allowing for efficient manual unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical unlocking mechanism is added to the safety switch, then emergency release capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the unlocking mechanism directly into the safety switch housing, merging multiple functions (locking, unlocking, actuation detection) into a single integrated device. The unlocking unit is formed as one piece with the housing, eliminating separate components and reducing overall system complexity while maintaining emergency release capability
Solution Approach 2:
The push belt is designed to automatically return to its initial position after actuation through its own elastic properties, without requiring additional reset mechanisms or external intervention. The belt self-retracts after releasing the locking element, simplifying the mechanism by eliminating dedicated reset components
2Ease of operation
If a push belt is used for force transmission, then ease of operation is improved, but reliability worsens due to potential buckling
Solution Approach 1:
The push belt is given a curved or bent configuration within the housing, allowing it to follow a specific path that prevents buckling during actuation. The curved geometry ensures the belt remains under tension and transmits force reliably from the actuator to the locking element while maintaining ease of manual operation
Solution Approach 2:
The push belt acts as an intermediary element between the actuator and the locking mechanism, transferring the actuating force while isolating the two components. This allows the actuator to be positioned optimally for ease of operation while the belt's geometry ensures reliable force transmission to the locking element
3Strength
If the push belt is made shear-resistant, then strength is improved, but manufacturing precision requirements increase
Solution Approach 1:
The push belt is formed as an integrated part of the housing structure, combining the structural properties of the housing material with the functional requirements of the push belt. This integration allows the use of materials that provide both the necessary shear resistance and the required geometric precision without requiring separate manufacturing processes
Solution Approach 2:
The push belt is merged with the housing as a single component, eliminating the need for separate manufacturing and assembly of the belt. This integration simplifies manufacturing by reducing the number of precision-critical interfaces while maintaining the required shear resistance through optimized material selection and geometric design
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 cost-effective, high-reliability unlocking mechanism that ensures safe and reproducible release of the blocking element, enabling users to manually open protective doors in emergency situations, such as power failures, while maintaining structural integrity and adaptability to various designs.
Implementation Method 1
a push belt (4) which is mechanically connected to the mechanical actuating element and which has a free end (4a) which acts on the locking element when the mechanical actuating element is actuated, wherein the push belt (4) is designed to be shear-stiff
Implementation Method 2
a push belt guide (7) for the push belt (4), by means of which the push belt (4) is positively guided along a path that is at least partially curved
Implementation Method 3
Actuation of the push band releases the locking element from its holding position
Data Source
Figure 1a~1b
Figure 2a~2b
AI summary
The invention relates to a safety switch with a locking element that can be actuated by means of actuators. The locking element can be brought into a holding position by means of the actuators and held there by an actuating force. A release unit (1) with a mechanically actuated push band (4) is provided. Actuation of the push band (4) releases the locking element from its holding position.