Device for locking the package compartment of a mailbox and use of the device
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Solution Overview
Problem
Existing mailbox systems lack effective theft protection for parcels, as they often rely on complex mechanical mechanisms that depend on package weight or size, require maintenance, and are not user-friendly, failing to provide comprehensive security and ease of operation.
Innovation Solution
A simple, cost-effective mailbox design using standard profiles with a mechanism that locks the parcel compartment independently of package size or weight, featuring a pendulum and guide plate system that automatically secures the compartment when closed and unlocks it when the mailbox is opened, eliminating the need for additional operating steps or maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical locking mechanism dependent on package weight or size is used, then the parcel compartment can be locked automatically, but the device complexity increases and maintenance is required due to wear parts
Solution Approach 1:
The patent replaces complex mechanical locking mechanisms with a magnetic field-based locking system. The magnetic field is generated by a permanent magnet or electromagnet that interacts with a ferromagnetic material in the locking element, eliminating the need for springs, cords, and other wear-prone mechanical parts while achieving automatic locking based on package presence.
Solution Approach 2:
The locking mechanism automatically detects the presence of a package and engages the lock without requiring user intervention. The magnetic field continuously monitors the compartment state and self-activates the locking function when a package is detected, while the unlocking is triggered automatically when the mailbox door is opened.
2Reliability
If a mechanical locking mechanism is used, then the parcel compartment can be locked, but maintenance is required due to deteriorating springs and worn parts
Solution Approach 1:
The patent eliminates springs, cords, and other mechanical wear parts by using a magnetic field for both locking and unlocking functions. The magnetic locking system has no moving parts that wear out, making it maintenance-free throughout its service life while maintaining reliable theft protection.
3Reliability
If additional operating steps are required for locking, then security can be enhanced, but the ease of operation decreases
Solution Approach 1:
The locking mechanism automatically detects when a package is placed in the compartment and engages the lock without requiring the user to perform any additional actions. The system monitors the compartment state continuously and self-activates the locking function, maintaining both high security and ease of use.
Solution Approach 2:
The magnetic locking system is pre-configured to automatically engage as soon as a package is detected in the compartment. The locking action occurs immediately and automatically, eliminating the need for separate locking steps while ensuring security is maintained from the moment the package is deposited.
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
The solution provides robust theft protection with low production, assembly, and maintenance costs, ensuring secure parcel storage without additional operational complexity, working regardless of package size or weight, and maintaining functionality without wear parts.
Implementation Method 1
a pendulum (6) which, starting from an initial horizontal position, moves under the action of gravity into a lower position on closing of the parcel compartment door (13)
Data Source
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AI summary
The present invention describes a theft-proof mailbox consisting of a letter compartment and a parcel compartment provided with a locking mechanism (20, 21, 22). The parcel compartment is equipped with an additional mechanical device and is no longer locked after it has been emptied by the owner and then closed, so it can be opened by a parcel carrier. As soon as the parcel compartment is closed again, the parcel compartment is mechanically locked and can only be unlocked and opened by opening the mailbox using the locking mechanism.