Washing Machine Door Lock Assembly with Front-Panel Reset Access

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Solution Overview

Problem

Conventional washing machine door lock assemblies require disassembly and removal of components to access the manual reset mechanism, making it complicated and time-consuming for users.

Innovation Solution

A door lock assembly with a reset lever accessible through an opening in the front panel of the cabinet, allowing users to reset the door lock without disassembling the washing machine, featuring a rotatably mounted reset lever that engages the reset actuator to move the latch between locked and unlocked positions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the manual reset mechanism is located within the washing machine appliance, then the door lock can be reset, but users must disassemble and remove components to access it, making it complicated and time-consuming

Engineering Contradiction:
Improvedoor lock reset capabilityVSAvoidaccessibility of reset mechanism
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The reset mechanism is extracted from the interior of the washing machine and made accessible through an opening in the front panel. The reset lever extends through the front panel so users can operate it from the exterior without disassembling any components, thereby maintaining the reset capability while dramatically improving accessibility.

Inventive Principle:
Principle #2Taking out (Extraction)

2Ease of operation

If the reset mechanism is made accessible through the front panel, then user accessibility is improved, but the structural complexity of the door lock assembly increases

Engineering Contradiction:
Improveaccessibility of reset mechanismVSAvoiddoor lock assembly structure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The front panel opening serves multiple functions: it provides aesthetic integration with the cabinet design, allows user access to the reset lever, and maintains structural integrity of the door lock assembly. The reset lever itself performs dual functions by being both the locking mechanism actuator and the user-accessible reset tool.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Reliability

If components are disassembled to access the reset mechanism, then the reset can be performed, but the process becomes complicated and time-consuming

Engineering Contradiction:
Improvedoor lock reset capabilityVSAvoidtime to access reset mechanism
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The reset lever is pre-positioned and pre-configured within the door lock assembly during manufacturing, with the opening in the front panel already prepared to provide access. This preliminary arrangement eliminates the need for users to perform any disassembly actions, allowing them to directly reset the door lock by simply operating the lever from the exterior.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS12606949B2Door lock assembly for a washing machine appliance
Publication Date: 2026.04.21 HAIER US APPLIANCE SOLUTIONS INC
  • US12606949B2 patent drawing
  • US12606949B2 patent drawing
  • US12606949B2 patent drawing

AI summary

A washing machine appliance includes a cabinet including a front panel defining a chamber opening, a wash tub positioned within the cabinet and defining a wash chamber, a wash basket rotatably mounted within the wash tub, a door rotatably mounted to the front panel and moveable between open and closed positions, and a door lock assembly for selectively locking the door in the closed position. The door lock assembly includes a door lock extending within the cabinet and including a latch moveable between locked and unlocked positions and a reset actuator for moving the latch from the locked to the unlocked position, and a reset lever for engaging the reset actuator to move the latch from the locked to the unlocked position. The reset lever is rotatable mounted within the cabinet and the front panel of the cabinet defines an opening for providing access to the reset lever.