Cable-Pull Door Mechanism for Jam-Free Cooking Appliances
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Solution Overview
Problem
Existing cooking appliance door mechanisms are prone to jamming and jerky movements due to reliance on single drive systems, leading to undesirable impacts during automatic operation.
Innovation Solution
A cooking appliance design that combines a motor-driven cable pull device with a spring element and damping module, allowing partial automatic movement and manual completion of the door's path, ensuring jerk-free and jam-free operation by distributing movement actuation between these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a single motor-driven drive unit is used to automatically move the door, then automation is improved, but jamming and jerky movements occur
Solution Approach 1:
The drive system is segmented into multiple independent components: a motor-driven cable pull device for initial movement, a spring element for continued movement, and a damping module for controlled deceleration. Each component operates during a specific phase of door movement, eliminating the jamming and jerky movements associated with single-drive systems while maintaining automation.
2Productivity
If the door is moved completely automatically by the drive unit, then productivity is improved, but excessive impact in end position occurs
Solution Approach 1:
The damping module is integrated into the drive system to provide beforehand cushioning. As the door approaches its end position, the damping module activates to dissipate kinetic energy through controlled resistance, preventing excessive impact. This allows the door to be moved completely automatically while protecting the system from harmful impact forces.
3Ease of operation
If a complex hinge mechanism with multiple rollers is used, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The complex multi-roller hinge mechanism is extracted and replaced with a simplified cable pull device that couples directly to the door. The cable device provides the necessary mechanical advantage and movement control without requiring complex hinge assemblies with multiple rollers, thereby reducing device complexity while maintaining ease of operation.
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 combined system provides a safe, robust, and coordinated door movement, preventing jamming and jerking, while the damping module and spring element ensure smooth transitions and prevent hard impacts during end position alignment.
Implementation Method 1
a spring element, with which a further partial path between the closed position and this intermediate position can be brought about
Implementation Method 2
a damping module, with which the movement of the door along this further partial path can be damped
Data Source
Figure 1~2
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Figure 5~6
AI summary
The invention relates to a cooking appliance (1) having a housing (2), in which a cooking chamber is formed, and having a door (3) for sealing the cooking chamber, wherein the door (3) is arranged on the housing (2) in a pivotable manner and can be lowered into a storage space (14) in the housing (2), and having a drive unit (17) having a motor (18), by means of which the motion of the door (3) can be automatically effected, wherein the drive unit (17) has a cable pull device (19), which is coupled to the motor (18) and the door (3), wherein the motion of the door (3) can be effected as a factor of a motorized actuation of the cable pull device (19).