Cooking Device Dual-Button Door Lock to Prevent Child Access
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Solution Overview
Problem
Conventional cooking appliances pose a safety hazard as children can accidentally open the door, leading to high-temperature gas or food scalding due to their simple door-opening mechanisms.
Innovation Solution
A cooking device with a dual-button operation system, where the first button must be pressed to move a blocking member to the avoiding position, allowing the second button to open the door, requiring two steps to open the device, thereby preventing accidental openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple door-opening mechanism is used, then the ease of operation is improved, but the safety is worsened due to accidental openings by children
Solution Approach 1:
The door-opening operation is segmented into two distinct steps: first pressing the first button to move the blocking member to the avoiding position, then pressing the second button to open the door. This segmentation prevents accidental single-step openings by children while maintaining operational clarity for adults.
Solution Approach 2:
The blocking member is positioned to block the second button in advance (initial position), requiring the user to first perform the preliminary action of pressing the first button to move the blocking member to the avoiding position before the door can be opened. This preliminary action adds a safety layer against accidental openings.
2Reliability
If a two-step operation system is implemented, then the safety against accidental opening is improved, but the device complexity increases
Solution Approach 1:
The blocking member serves multiple functions: it blocks the second button in the initial position to prevent accidental opening, and it can be moved to the avoiding position by the first button to enable door opening. This multi-functionality reduces the need for separate components for each function, thereby limiting the increase in device complexity.
Solution Approach 2:
The blocking member acts as an intermediary element between the first button and the second button. It mediates the interaction by blocking the second button until the first button is pressed, providing a simple mechanical solution that avoids complex control systems while achieving the safety function.
3Reliability
If the blocking member blocks the second button, then the safety is improved by preventing accidental opening, but the ease of operation is worsened due to additional steps required
Solution Approach 1:
The blocking member transitions from a static blocking state (initial position) to a dynamic unblocking state (avoiding position) when the first button is pressed. This dynamic behavior allows the system to adapt between safety mode (blocking) and operation mode (unblocking), balancing safety and ease of operation.
Data Source
AI summary
A cooking device includes: a box body provided with a buckle; a door body rotatably connected to the box body, and wherein the door body is provided with a door hook that is snap-fitted with the buckle, the door hook is movable relative to the door body, and has a first position and a second position, wherein when the door hook is snap-fitted with the buckle, the door hook is in the first position; and a switch assembly arranged on the box body and including a first button, a second button, and a blocking member. The blocking member is capable of being moved relative to the first button and/or the second button, and has a blocking position and an avoiding position. The first button is configured to drive the blocking member to move from the blocking position to the avoiding position.