Appliance Door Handle Cable Mechanism for Simple Pivot Return
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Solution Overview
Problem
Conventional door handle mechanisms for household appliances are complex and component-intensive, making them prone to malfunction and difficult to assemble, while also lacking a simple and reliable way to pivot the handle relative to the door base.
Innovation Solution
A door handle mechanism using a single-run cable coupled with a return spring, where one end of the spring is fixed to the handle and the other to the door base, allowing for a compact and reliable pivoting motion without the need for a double tension wire guide, ensuring the handle automatically returns to its initial position when closed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a double tension wire guide is used to pivot the handle, then the handle can be easily gripped in both closed and open positions, but the mechanism becomes complex and component-intensive
Solution Approach 1:
The patent extracts and eliminates the complex double tension wire guide mechanism from the door assembly, replacing it with a simplified single-run cable system that achieves the same handle positioning function with fewer components
Solution Approach 2:
The patent combines the functions of multiple tensioning wires and guides into a single integrated cable-run mechanism, merging the complexity of multiple components into one unified system that maintains handle accessibility while reducing overall mechanism complexity
2Reliability
If a double tension wire guide is used for handle pivoting, then the handle movement can be controlled, but the assembly becomes prone to malfunction
Solution Approach 1:
The patent removes the double tension wire guide system that causes reliability issues, replacing it with a simpler single cable mechanism that has fewer potential failure points and is less prone to malfunction
Solution Approach 2:
The return spring in the patent provides automatic self-service functionality, ensuring the handle returns to its initial position without requiring complex tensioning mechanisms, thereby improving reliability through a self-regulating system
3Device complexity
If a single-run cable with return spring is used, then the mechanism is simplified and more reliable, but the handle must automatically return to initial position
Solution Approach 1:
The return spring is pre-loaded and positioned in advance to automatically return the handle to its initial position, performing the positioning action beforehand rather than requiring active control during operation
Solution Approach 2:
The handle positioning system serves itself through the return spring mechanism, which automatically returns the handle to its initial position without requiring external control, simplifying the mechanism while maintaining operational control
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 simplifies the door handle mechanism, reducing complexity and the risk of malfunction, while providing a stable and precise motion control, ensuring the handle is securely held in its non-pivoted position when closed and easily gripped in the open position.
Implementation Method 1
a return spring (25), which is firmly connected to a first end (26) on the handle side... The return spring (25) is prestressed at least in an open end position of the door and in a pivoting position of the handle part that accompanies it
Data Source
Figure 1~2
Figure 3~6
Figure 7~10
AI summary
The invention relates to a door (4) for a household appliance (1), with a plate-like base part (7) on which a handle (6) with a movable handle part (6a) is arranged, and a coupling device (21) which is connected to the handle part (6a) and by means of which the handle part (6a) can be pivoted relative to the base part (7) depending on the movement of the door (4), the coupling device (21) comprising a single-run cable (22) which on the handle part has a first end (26) of a return spring (25) is coupled, wherein the return spring (25) is arranged with a second end (27) outside of the handle part. The invention also relates to a household appliance (1) and a method for moving a handle (6) of a door (4).