External Actuation Assembly for Panic Bars
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Solution Overview
Problem
Existing external actuation assemblies for panic bars and handles are bulky, costly, and difficult to maintain due to protruding locks that interfere with handle rotation, making them unsuitable for spaces with dimensional constraints and requiring specialized locks.
Innovation Solution
An external actuation assembly with a contoured shell accommodating the handle pivot and a European-style cylinder lock positioned above the handle, allowing minimal protrusion and easy rotation without interference, using a slider mechanism for locking and unlocking, and standard cylinder locks for reduced costs and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the lock is positioned directly below the handle, then the assembly is compact in vertical space, but the handle cannot rotate effectively due to interference with the cylinder
Solution Approach 1:
The lock is repositioned from a vertical arrangement (below the handle) to a horizontal arrangement (to the side of the handle). This dimensional change allows the handle to rotate freely without interfering with the cylinder, while maintaining a compact overall footprint by utilizing horizontal rather than vertical space.
2Ease of operation
If the lock is positioned considerably lower than the handle, then handle rotation is unobstructed, but the assembly becomes awkward and occupies excessive space
Solution Approach 1:
Instead of extending the assembly vertically downward to accommodate both the handle and lock, the design shifts the lock to a horizontal position adjacent to the handle. This transforms a vertical space problem into a horizontal arrangement, achieving unobstructed handle rotation without increasing overall assembly height.
Solution Approach 2:
The handle and lock are positioned adjacent to each other in a compact side-by-side arrangement rather than being separated vertically. This merging of spatial organization reduces the overall height of the assembly while maintaining operational independence of both components.
3Length of stationary object
If embedded locks are used within the handle, then space occupation is reduced, but production and maintenance costs increase significantly
Solution Approach 1:
The design uses a standard European cylinder lock that can be used across multiple applications and door types, rather than a custom embedded lock specific to this handle design. This universal component approach reduces production costs, simplifies maintenance, and enables easy replacement while achieving the required compact footprint through proper spatial arrangement.
Data Source
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AI summary
An external actuation assembly (1) associable with handles, panic bars and the like, of the type comprising a contoured shell (2) provided with a channel for accommodating the actuation pivot (3a) of a handle (3). The shell (2) comprises a protrusion (4) that lies above the hole and is provided with a seat (5) for a cylinder (6) controlled by a respective key.