Household Appliance Door with Gravity-Assisted Automatic Retraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing household appliances, such as ovens, require manual effort to open and close the door, which can be cumbersome and lacks user-friendly automation, especially in terms of door opening mechanisms that do not rely on motor drives.
Innovation Solution
The appliance door is designed to automatically open into a storage space using its own gravity, with a spring-loaded guide system and damping elements, allowing the door to pivot and lower without additional force, and can be unlocked via a control element on the control panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the door is designed to open automatically using gravity and spring force, then user comfort and ease of operation are improved, but control over door opening becomes more complex
Solution Approach 1:
The door opening mechanism utilizes the door's own weight and gravity to automatically open the door after unlocking, eliminating the need for motorized actuators or complex mechanical linkages. The spring-loaded guide system provides the necessary force to initiate movement, and the door's gravity completes the opening action, making the system self-servicing rather than externally actuated.
Solution Approach 2:
The spring-loaded guide system acts as a counterweight mechanism that stores potential energy when the door is closed and releases it to assist door opening. The spring force compensates for the initial resistance to door movement, while the door's own weight provides the continuing force needed to complete the opening stroke, effectively using the door's mass as a counterweight resource.
2Productivity
If the door is lowered into storage space using gravity, then productivity and speed of door operation are improved, but risk of uncontrolled movement and damage increases
Solution Approach 1:
The guide system incorporates damping elements and friction-based resistance that gradually increase as the door approaches the fully open position. This beforehand cushioning prevents the door from slamming into the storage space by providing progressive resistance that controls the door's kinetic energy throughout its travel, ensuring reliable and damage-free operation.
Solution Approach 2:
The guide system is designed with dynamic characteristics that change during door movement. The effective friction and damping forces are not constant but vary with door position and velocity, providing gentle assistance during initial opening and increasing resistance near the end of the stroke. This dynamic behavior enables both fast opening and controlled deceleration without requiring active control systems.
3Reliability
If manual door opening is required, then control and reliability are maintained, but user effort and operational complexity increase
Solution Approach 1:
The system combines automatic door opening through gravity and spring force with simple manual unlocking. The user only needs to release the locking mechanism, after which the door opens automatically without requiring the user to exert force on the door itself. This self-service approach maintains reliability through the simple unlock action while dramatically improving ease of operation for the actual door opening.
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
This solution enhances user comfort by eliminating the need for manual door opening and reduces costs and installation space by leveraging the door's weight and gravity, while ensuring safe and controlled opening through damping elements, preventing accidental opening and reducing noise.
Implementation Method 1
the appliance door can be automatically lowered from the closed position into the open position at least in sections, in particular over a predominant section, due to its own gravity
Implementation Method 2
Provision is made for the device door to be arranged prestressed in the closed position by means of a spring force, in particular of the guide system
Implementation Method 3
ensuring safe and controlled opening through damping elements, preventing accidental opening and reducing noise
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
The appliance (1) has an interior space (3) for receiving to be treated material. An apparatus door (4) is provided for opening and closing the interior space of reservoir (5). A guidance system is provided to set apparatus door between closed position at which interior space is closed and open position at which interior space is opened. A locking device is set to secure apparatus door in closed position. The apparatus door is unlocked from closed position into open position through automatically retracting gravitational force by unlocking the locking device.