Laundry Appliance Receiving Device with Mechanical Assembly Blocking
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Solution Overview
Problem
The existing laundry treatment appliances face issues with incorrect reinstallation of functional components, leading to malfunctions and potential liquid leakage, especially when multiple components are used in the same receiving device and one is forgotten.
Innovation Solution
A receiving device with a blocking mechanism that ensures the second functional component can only be displaced into an end position when the first functional component is inserted, using a ramp element and pawl element design without electrical components, allowing for reliable assembly detection and preventing faulty assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blocking device is added to prevent incorrect insertion of functional components, then assembly reliability is improved, but device complexity increases
Solution Approach 1:
The blocking device utilizes the functional components themselves as part of the blocking mechanism. The first functional component's presence automatically enables or disables the blocking of the second component through the ratchet and pawl mechanism, eliminating the need for external sensors or control systems. The system serves itself by using its own components to enforce the correct assembly sequence.
Solution Approach 2:
The ratchet element and pawl element act as mechanical intermediaries that transmit the presence or absence of the first functional component to the blocking mechanism. These intermediary elements convert the physical state (presence/absence) into a mechanical blocking or unblocking action without requiring complex control systems.
2Measurement precision
If electrical components such as sensors and actuators are used for presence detection, then detection precision is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent replaces electrical detection systems (sensors and actuators) with a purely mechanical presence detection mechanism. The ratchet element's position changes mechanically in response to the presence or absence of the first functional component, and this mechanical state directly controls the pawl element to enable or disable blocking. This mechanical substitution eliminates the need for electrical components while maintaining reliable detection.
Solution Approach 2:
The mechanical system uses its own structural elements (ratchet and pawl) to detect and respond to the presence of functional components without external electrical assistance. The system's own mechanics provide the detection and control functions that would otherwise require separate electrical systems.
3Reliability
If the pawl element remains under continuous stress to maintain blocking position, then reliability is improved, but service life decreases due to material fatigue
Solution Approach 1:
The pawl element experiences periodic rather than continuous stress. It is only loaded when transitioning between blocked and unblocked states during assembly or disassembly operations. During normal operation, the pawl remains in a neutral position without sustained stress, allowing it to return to its voltage-free initial state. This periodic loading significantly reduces material fatigue and extends service life.
Solution Approach 2:
Instead of maintaining continuous stress to ensure reliability, the design inverts the approach by using a spring element that returns the pawl to a stress-free state. The blocking reliability is achieved through the mechanical geometry of the ratchet and pawl engagement rather than continuous force application, allowing the system to maintain reliability while minimizing fatigue.
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 prevents faulty assembly and commissioning by ensuring the presence of the first functional component, increasing the service life of the latch element and allowing for cost-effective production, while enabling easy and error-free insertion and removal of components.
Implementation Method 1
the first functional component has a ramp element, and the second functional component has a ratchet element, wherein when the second functional component is inserted into the receiving device, the ratchet element can be pushed out by the ramp element of the first functional component inserted into the receiving device from a rest position can be deflected into a release position
Implementation Method 2
the pawl element is de-energized in the rest position and in the end position of the second functional component. After the functional components have been inserted, the pawl element therefore returns to a voltage-free initial state, the idle state
Data Source
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AI summary
The invention relates to a laundry treatment apparatus (100) comprising a receiving device (102) into which a first functional component (104) and a second functional component (106) can be inserted. According to the invention, the receiving device (102) comprises a blocking element (108) which is designed such that, when the first functional component (104) is inserted, the second functional component (106) can be moved into the receiving device (102) up to a final position (E) and, when the first functional component (104) is not inserted, is designed such as to block movement to the final position (E).