Lint Filter Lock Unit Design for Secure Access and Theft Prevention
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Solution Overview
Problem
Laundry treatment apparatuses face malfunctions due to pollutant accumulation from drying operations, which existing designs fail to effectively address through inadequate filtration and locking mechanisms, leading to potential theft and interference issues during assembly.
Innovation Solution
A laundry treatment apparatus with a lint filter unit and lock unit that includes a rotatable lock body, shaft, and bent portions to securely lock the filter in place, preventing unauthorized removal and ensuring proper air discharge, featuring a discharge duct with a filter housing and holder guide for efficient pollutant filtration and assembly guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a lint filter unit is made accessible from the front surface for easy maintenance, then ease of operation is improved, but the risk of unauthorized removal and theft increases
Solution Approach 1:
The lock unit employs a rotatable lock body that transitions between locked and unlocked states, dynamically controlling access to the lint filter unit. This allows the system to switch between easy access (unlocked) and secure containment (locked) based on operational needs.
Solution Approach 2:
The lock unit acts as an intermediary mechanism between the lint filter unit and the cabinet, mediating access control. It provides a controlled interface that allows authorized removal while preventing unauthorized access, thus resolving the contradiction between accessibility and security.
2Reliability
If the lint filter unit is securely locked to prevent theft, then reliability is improved, but ease of operation for maintenance decreases
Solution Approach 1:
The rotatable lock body enables dynamic switching between locked and unlocked states, allowing the system to provide both security during operation and easy access during maintenance. The simple rotational motion maintains ease of operation while ensuring security.
Solution Approach 2:
The lock unit is designed to be easily operated by the user without requiring additional tools or complex procedures. The user can independently lock and unlock the lint filter unit, maintaining both security and ease of maintenance.
3Reliability
If a lock unit is added to secure the lint filter unit, then reliability is improved, but device complexity increases
Solution Approach 1:
The lock unit is segmented into distinct functional components: a rotatable lock body for state control, a shaft for rotational motion transmission, and bent portions for engagement. This segmentation allows each component to perform its specific function with simple geometry, reducing overall complexity while maintaining security.
Solution Approach 2:
Instead of using a complex locking mechanism that prevents removal, the design uses a simple rotatable body with bent portions that engage with corresponding features. The simplicity of the inverted approach (using basic geometric shapes) reduces complexity while achieving the security goal.
4Ease of operation
If the discharge duct is made withdrawable for maintenance, then ease of operation is improved, but the risk of interference and damage during assembly increases
Solution Approach 1:
The holder guide is installed in advance on the cabinet to define the correct insertion path and positioning for the discharge duct. This preliminary preparation ensures that when the duct is withdrawn and reinstalled, it aligns properly without causing interference or damage to surrounding components.
Solution Approach 2:
The holder guide acts as an intermediary element between the cabinet and the discharge duct, mediating the assembly and disassembly process. It provides physical guidance and constraint during insertion, preventing misalignment and potential damage while maintaining ease of withdrawal for maintenance.
Data Source
AI summary
A laundry treatment apparatus may include a cabinet defining an appearance of the laundry treatment apparatus, a drum provided in the cabinet and configured to hold laundry, a connecting duct configured to communicate with the drum, a lint filter unit that is mounted to an inner surface of the cabinet that is accessible from a front surface of the cabinet, and that is configured to communicate with the connecting duct to filter pollutant and a lock unit configured to selectively lock the lint filter unit to the connecting duct, where the lock unit includes a rotatable lock body, a shaft configured to rotate together with the lock body, at least one bent portion, and a lock guide with at least one bent section.