Integrated Latch Module for Secure Locking and Auto Door Opening
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Solution Overview
Problem
Existing cooking devices face challenges in incorporating a secure lock function for self-cleaning with a separate automatic opening function while also allowing manual opening and closing, leading to increased components, production costs, and complexity, which complicates door control and may result in accidental door opening during initialization.
Innovation Solution
A latch module that integrates manual lock, secure lock, and automatic opening functions using a single latch with a single drive source and power transmission structure, employing kinematic interference between components to control the latch's position and operation, minimizing the number of switches and ensuring safe and reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate secure lock device and automatic opening device are applied, then door security and automatic opening functions are achieved, but device complexity and production costs increase
Solution Approach 1:
The patent combines the secure lock device and automatic opening device into a single integrated latch module. The latch unit serves dual purposes: it provides secure locking during self-cleaning operations and enables automatic door opening when needed. This merging eliminates the need for separate drive mechanisms and power transmission structures for each function, thereby reducing device complexity and production costs while maintaining both security and automation capabilities
Solution Approach 2:
The latch unit is designed as a multi-functional component that performs multiple operations: manual door closing assistance, secure locking during self-cleaning, and automatic door opening. By making the latch unit universal, the patent eliminates the need for separate dedicated components for each function, reducing the overall number of parts and simplifying the door control system while maintaining all required functionalities
2Ease of manufacture
If latch module is initialized without proper control, then production is simplified, but accidental door opening occurs
Solution Approach 1:
The patent implements a preliminary initialization sequence that must be completed before the latch module becomes operational. During this initial phase, the controller executes a standardized routine that determines the latch's starting state, configures appropriate control parameters, and ensures the door remains securely locked. This preliminary action prevents accidental door opening by establishing proper control conditions before any user interactions or cooking operations begin, thereby maintaining both manufacturing simplicity and operational reliability
Data Source
AI summary
A latch module for controlling an opening and a closing of a door of an appliance includes a latch, a spring that applies an elastic force to the latch, a motor; and a cam that contacts a contact surface of the latch and is coupled to the motor to drive the cam to pivot the latch. The cam includes a first radius, a second radius, and a third radius in a circumferential direction at an outer circumference of the cam. The latch is positioned at a first basic position when the first radius of the cam contacts the contact surface of the latch, positioned at a second basic position when the second radius of the cam contacts the contact surface of the latch, and positioned at a third basic position when the third radius of the cam contacts the contact surface of the latch.