Self-locking guillotine door with cam mechanism
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Solution Overview
Problem
Existing animal enclosure doors lack a mechanism to prevent animals from lifting them from the bottom while allowing caregivers to open and close the doors remotely, which is crucial for safety, especially in environments with aggressive animals.
Innovation Solution
A self-locking guillotine door assembly with a locking mechanism that includes a cable, vertical slide, connector bars, and cams, allowing the door to be opened by pulling the cable but resisting lifting when pushed from the bottom, ensuring secure operation without exposing caregivers to animals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional enclosure door is used, then the door can be opened and closed by the caregiver, but the animal can lift the door from the bottom
Solution Approach 1:
The door assembly performs its own locking function automatically. When the door is pushed up from the bottom by an animal, the sliding mechanism engages with the stop element to lock the door in place without requiring external intervention. The system uses the animal's own lifting action to trigger the locking mechanism.
Solution Approach 2:
The locking mechanism transitions between locked and unlocked states dynamically based on the direction of force applied. When force is applied upward from the bottom, the slider engages the stop element to lock. When the caregiver pulls the cable, the slider disengages and the door can be opened. The system adapts its state based on operational conditions.
2Reliability
If the door is made secure against lifting, then the animal cannot lift the door, but the caregiver cannot open the door remotely
Solution Approach 1:
A cable acts as an intermediary mechanism between the caregiver and the door. The cable is connected to the sliding mechanism, allowing the caregiver to pull the cable from a safe distance to disengage the lock and open the door. This intermediary transmits the opening force without requiring the caregiver to be in contact with the door or in the animal's space.
3Ease of operation
If the door allows remote operation, then the caregiver can open the door safely, but the door may become vulnerable to animal manipulation
Solution Approach 1:
The locking mechanism proactively prevents animal interference by automatically locking when the door is pushed up from the bottom. This preliminary anti-action counteracts the potential harmful effect of animal manipulation before it can compromise door security. The system is designed to anticipate and prevent unauthorized opening attempts.
Data Source
AI summary
The self-locking guillotine door assembly includes a door, a locking mechanism attached to the door, and a cable attached to the locking mechanism. Pulling the cable releases the locking mechanism and lifts the locking mechanism and door. Pushing up on the bottom of the door locks the locking mechanism and resists lifting the door. The locking mechanism can include a post, a vertical slide with a slot, connector bars and cams such that when the cable is pulled, the cable lifts the vertical slide to lift proximal ends of the connector bars, which pivots the cams to release the locking mechanism. When the enclosure door is pushed up from the bottom, the locking mechanism pivots the cams towards the top of the enclosure door to lock the locking mechanism and resist lifting of the enclosure door.