Door Barricade Device with Low Pivot Stop
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Solution Overview
Problem
Existing door barricade devices are difficult for children, people in wheelchairs, or those crouching or lying on the floor to operate effectively, as they require complex mechanisms and may not be safe or quick enough to prevent intruders from entering.
Innovation Solution
A door barricade device with a pivotable stop-device that can be easily activated from a lower elevation, using a spring or motor-assisted linkage system, allowing the device to be operated with minimal force and without requiring precise dexterity, and featuring a release/override mechanism for authorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cross bar pivots from a hinge assembly mounted to a door frame at standard height, then the barricade function is achieved, but the device becomes difficult for children, people in wheelchairs, or those crouching or lying on the floor to operate
Solution Approach 1:
The invention relocates the pivot point from a standard height location to a lower elevation position adjacent to the door. This dimensional change in pivot location allows users sitting, crouching, or lying on the floor to access and operate the device, while the stop device itself extends upward to maintain its barricading function against the door.
Solution Approach 2:
Instead of having the stop device pivot from a high location downward, the invention inverts the approach by having it pivot from a low location upward. The stop device extends from the low pivot point to engage with the door or door frame, reversing the traditional motion direction to accommodate users with limited reach or mobility.
2Reliability
If a complex mechanism is used to barricade the door, then the barricade function is achieved, but the operation may be unsafe and too slow to prevent intruder entry
Solution Approach 1:
The barricade device is segmented into distinct functional components: a pivot assembly at low elevation, a stop device with arm that can be positioned to block the door, and a bracket that overlaps the arm in the barricade position. This segmentation allows for simpler, more direct operation compared to integrated complex mechanisms.
Solution Approach 2:
The device is designed to be operated by simple user input (applying force to move the stop device to the barricade position), after which the system maintains its barricading function automatically. The bracket and stop device arrangement allows the mechanism to hold its position without continuous power or complex control systems.
3Ease of operation
If the stop-device is positioned at low elevation for accessibility, then ease of operation is improved, but the stop-device may not effectively barricade the door
Solution Approach 1:
The device employs local quality by having the pivot point located at low elevation for accessibility, while the stop device arm extends upward to engage with the door or door frame at a higher position. This creates different functional zones: the low pivot point for user access, and the higher stop position for effective barricading.
Solution Approach 2:
The invention uses dimensional change by positioning the pivot point in a low horizontal plane adjacent to the door, while the stop device arm extends in a different spatial direction to reach the door or door frame. This allows the operational point and the functional barricade point to be at different elevations, combining accessibility with effectiveness.
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 device allows for rapid and accessible barricading of doors by a wide range of individuals, including those with disabilities, while ensuring that authorized personnel can easily override the barricade when necessary, enhancing safety and usability.
Implementation Method 1
a spring that is mechanically linked to the stop-device so as to bias the stop-device to a barricade-position
Implementation Method 2
A motor may be employed to provide a force that moves the stop-device to the barricade-position, or to a reserve-position, or both
Implementation Method 3
The stop-device may include a pivotable cam and an arm extending from the cam
Data Source
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AI summary
A barricade device and a method of barricading a door are disclosed. The device and method may be used to barricade a door, and thereby prevent an intruder from entering a sheltering space, such as a classroom, storeroom, or hallway. The barricade-device may have a pivotable stop-device that is pivotable from a location adjacent to a door. The pivot-location may be at an elevation that is lower than a door handle on the door. The stop-device may be pivotable from a reserve-position to a stop-position. In the reserve-position, the stop-device does not barricade the door. In the barricade-position, the stop-device barricades the door.