Thermally Triggerable Switching Device with Deferred Activation
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Solution Overview
Problem
Existing thermally triggerable mechanical switching devices are complex and costly to manufacture, leading to unnecessary mechanical stress on heat-sensitive components throughout their service life, and lack a simple method for deferred activation.
Innovation Solution
A thermally triggerable indication or switching device with a movable, mechanically preloaded slide and a heat-sensitive preformed part that changes its state of aggregation, allowing for deferred activation by moving the slide to create a gap space and using a flexible arm to support and preload the preformed part, which is only activated upon reaching its melting temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the preformed part is integrated into the electrical connection path from the beginning, then the disconnecting function is ensured, but the preformed part is subjected to mechanical stress over the entire service life which is unnecessary
Solution Approach 1:
The patent applies preliminary action by pre-tensioning the spring mechanism during assembly so that the preformed part is held in a stress-free initial position. The mechanical stress is only applied to the preformed part when actually needed for disconnection, not throughout the entire service life. This is achieved through the initial positioning of the preformed part in the connection position with the spring already pre-tensioned, ready to act but not yet stressing the preformed part.
2Object-affected harmful factors
If a complex design is used to prevent mechanical stress on the preformed part, then the preformed part is protected, but the device becomes costly and complex in terms of design
Solution Approach 1:
The patent merges the spring mechanism with the disconnection function, combining the force generation and the actual disconnection action into a single integrated mechanism. The spring serves dual purposes: maintaining the preformed part in its initial position and providing the force for disconnection when triggered. This integration eliminates the need for separate complex protective mechanisms while still preventing unnecessary mechanical stress on the preformed part.
3Ease of manufacture
If the device is manufactured with the preformed part in a fixed position, then the manufacturing process is simple, but the device cannot be activated subsequently or deferred
Solution Approach 1:
The patent applies dynamics by designing the preformed part to be movable rather than fixed, allowing it to transition between connection and disconnection positions. The spring mechanism provides the dynamic force needed for this movement. During manufacturing, the preformed part is positioned in the connection state, but the design allows it to be activated later when needed, providing both manufacturing simplicity and deferred activation capability.
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
Enables simple, cost-effective manufacturing and deferred activation of the device, preventing unnecessary mechanical stress on the preformed part and ensuring reliable triggering without mechanical vibrations or stresses, allowing for individual activation only when the component is in use.
Implementation Method 1
a preformed part (12) which changes its state of aggregation under the effect of heat
Data Source
AI summary
The invention relates to a thermally triggerable indication or switching device, having a movable, mechanically preloaded slide which directly or indirectly triggers or actuates the indication or switching device, and having a preformed part which changes its state of aggregation under the effect of heat, the preformed part, in the functional state, being adapted to be arranged so as to block the movable slide. According to the invention, in the initial state, the preformed part is loosely located in a receiving space. For transferring the preformed part to the functional state, the slide is moved in a position such that a gap space opens between the slide and a slide stop, wherein the preformed part enters the gap space and the slide is simultaneously preloaded.