Retractable Latch Hook Shroud for ICU Door Snag Prevention
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Solution Overview
Problem
Entry doors in ICU/CCU rooms with manual sliding mechanisms have exposed latch hooks that can snag on equipment or clothing when opened, posing a safety hazard.
Innovation Solution
A retractable latch hook shroud assembly with a spring-loaded shroud that encloses the latch hook when the door is open, preventing snagging and retracts to allow engagement with the door jamb when closed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the latch hook protrudes from the door panel end to engage the door jamb, then the door can be securely closed and opened, but the exposed latch hook can snag on equipment or clothing when the door is open
Solution Approach 1:
A shroud is introduced as an intermediary component between the latch hook and the external environment. The shroud covers the latch hook when the door is open, preventing direct contact with clothing or equipment, while allowing the latch hook to protrude for engagement when the door is closed.
Solution Approach 2:
The shroud is made movable rather than fixed, allowing it to dynamically adjust its position. The shroud can retract to allow latch hook engagement during door closing, and extend to cover the latch hook when the door is open, automatically adapting to the door's operational state.
2Object-affected harmful factors
If a shroud is added to cover the latch hook, then the snagging hazard is reduced, but the device complexity increases
Solution Approach 1:
The shroud functionality is merged with the existing latch assembly structure. The shroud is integrated into the latch mechanism, sharing common components such as the actuating linkages and mounting structures, thereby minimizing the increase in overall device complexity.
Solution Approach 2:
The shroud serves multiple functions: it acts as a protective cover for the latch hook, provides a smooth surface to prevent snagging, and can be integrated into the latch actuation mechanism. This multi-functionality justifies the added complexity by delivering multiple benefits from a single component.
3Ease of operation
If the shroud is spring-loaded to automatically extend and retract, then the operation is automated and convenient, but the device complexity and cost increase
Solution Approach 1:
The spring-loaded mechanism enables the shroud to automatically extend and retract based on door position without requiring external control or power sources. The system serves itself by using the door's movement to trigger the spring mechanism, which in turn controls the shroud's position.
Solution Approach 2:
The complex electrical or automated control systems are replaced with a simple mechanical spring mechanism. The spring provides the necessary force for automatic shroud movement, eliminating the need for motors, sensors, or electronic controls while achieving the same automated functionality.
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
Prevents snagging of clothing and equipment as personnel and equipment pass through the door opening while maintaining the door's functionality and safety.
Implementation Method 1
The spring biasing mechanism is interposed between the base plate and the end wall of the shroud
Data Source
AI summary
A retractable latch hook shroud assembly includes a base plate, a first post, a second post, a shroud, and a spring biasing mechanism. The first post extends from the base plate in a first direction. The second post extends from the base plate in the first direction, and the second post is spaced away from the first post in a direction orthogonal to the first direction. A shroud has an end wall and a side wall that extends away from the end wall. The side wall defines a latch hook recess. The end wall has a first hole and a second hole. The first hole is configured to slidably receive the first post and the second hole is configured to slidably receive the second post. The spring biasing mechanism is interposed between the base plate and the end wall of the shroud.