Dual-Slide Coupling Switch for Cooking Appliance Door Safety
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Solution Overview
Problem
Existing switch devices for cooking appliances with door-closed chambers face issues with bulkiness and user-friendliness due to long tappets for high safety requirements, leading to potential injuries and malfunctions.
Innovation Solution
A switch device with a coupling unit featuring separate slides coupled by a coupling element, allowing simultaneous actuation to activate the switch, and a base plate with locking parts to prevent undesired actuation, enabling compact and user-friendly design adaptable to varying safety standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If long tappets are used to meet high safety requirements, then safety against tampering is improved, but the device becomes bulky and less user-friendly
Solution Approach 1:
The long tappet is divided into two separate tappets that actuate different slides (first slide and second slide). Each tappet can be shorter and less intrusive, but both must be simultaneously actuated to open the microwave door, maintaining security while improving user comfort and reducing the bulkiness of individual actuating components.
2Reliability
If long tappets are used to meet high safety requirements, then safety against tampering is improved, but the tappets become prone to damage and bending
Solution Approach 1:
The single long tappet is segmented into two shorter tappets that each actuate separate slides. This segmentation reduces the length and structural vulnerability of each individual tappet, making them less prone to bending and damage while maintaining the required security through the simultaneous actuation mechanism.
Solution Approach 2:
The coupling unit includes a coupling element with locking parts that prevent undesired actuation of the switch. This locking mechanism acts as a protective measure beforehand, preventing accidental or unauthorized operation that could damage the tappets or compromise the door lock system.
3Ease of operation
If a compact design is used to improve user-friendliness, then ease of operation is improved, but safety requirements may not be met
Solution Approach 1:
The door lock control system is segmented into two independent actuation paths (first tappet to first slide, second tappet to second slide) that converge at the coupling unit. This allows each component to be compact and user-friendly, while the requirement that both paths must be simultaneously activated maintains high safety standards against tampering.
Solution Approach 2:
The coupling unit acts as an intermediary between the two slides and the switch actuating unit. It receives actuation signals from both slides through its coupling element and only activates the switch when both signals are present simultaneously, thereby enforcing security requirements while allowing for a compact overall design.
4Volume of moving object
If separate slides are used for each plunger, then the device can be made more compact, but the device complexity increases
Solution Approach 1:
The system uses separate slides for each plunger, which allows for a more compact arrangement compared to a single long mechanical linkage. The segmentation is managed through the coupling unit, which integrates the two slide actuations in a coordinated manner, balancing the increased component count with improved spatial efficiency.
Solution Approach 2:
The coupling element serves multiple functions: it couples the first and second slides together, provides locking parts to prevent undesired actuation, and transmits the combined actuation force to the switch actuating unit. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity despite the use of separate slides.
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
The invention relates to a switching device (2) for a cooking appliance with a cooking chamber that can be closed by a door, comprising at least one switch (4, 6, 8), an actuating unit (10) for actuating the switch (4, 6, 8) and a coupling unit (12) for coupling the actuating unit (10) with two plungers (14) of the door, wherein the coupling unit (12) has a separate slide (16, 18) for each plunger (14), and wherein the two sliders (16, 18) are coupled to each other by means of a coupling element (20) such that the actuating unit (10) actuates the switch (4, 6, 8) depending on a simultaneous actuation of the two sliders (16, 18) by means of the two plungers (14). Furthermore, the invention relates to a cooking appliance comprising a cooking chamber that can be closed by a door and at least one switching device (2) with at least one switch (4, 6, 8).