Panic Bolt Crash Bar Pivoting Gravity Return
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Solution Overview
Problem
Existing panic bolts are complex and costly due to multiple production steps and internal space constraints, requiring dedicated return means for the crash bar, which increases complexity and unit cost.
Innovation Solution
A panic bolt design featuring a crash bar that pivots about a longitudinal axis using a profiled section member, eliminating the need for return means by leveraging gravity, with abutments and stop portions to control movement and simplify production and fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated return means are used to raise the crash bar, then the crash bar can be returned to idle position, but the device complexity and production cost increase
Solution Approach 1:
The panic bolt mechanism automatically returns the crash bar to its idle position without requiring dedicated return means. The profiled section member's geometry and articulation design enable self-return through the natural movement sequence, eliminating the need for additional return mechanisms and reducing overall device complexity
Solution Approach 2:
Instead of using active return means to push the crash bar back, the invention inverts the approach by designing the profiled section and articulation geometry so that the crash bar's own movement and gravity cause it to return to the idle position automatically
2Ease of operation
If standard articulated panic bolt components are used, then the crash bar can pivot between positions, but the internal space consumption increases
Solution Approach 1:
The profiled section member is designed with a C-shaped or U-shaped cross-section that allows it to nest within or alongside the fixed part structure. This nesting arrangement enables the crash bar to pivot between positions while occupying minimal internal space, as the profiled geometry efficiently utilizes the available space
Solution Approach 2:
The invention uses a profiled section member with a specific cross-sectional geometry that allows articulation in one dimension while minimizing space consumption in other dimensions. The profiled shape enables the crash bar to move through a pivot arc without requiring excessive clearance or internal volume
3Manufacturing precision
If many production process steps are used, then the panic bolt can be precisely manufactured, but the unit cost increases
Solution Approach 1:
The profiled section member combines multiple functions into a single component: it serves as the crash bar, provides articulation through its geometric profile, defines the movement range through integrated stop portions, and eliminates the need for separate return means. This merging reduces the number of production steps and lowers unit cost while maintaining manufacturing precision
Solution Approach 2:
The profiled section member is designed as a multi-functional component that performs articulation, limits movement range, and enables automatic return all through its geometric design. This universal component approach simplifies manufacturing by reducing the number of separate parts and production processes required
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 design results in a simpler, more reliable, and cost-effective panic bolt with reduced production complexity, allowing for easier fitting and operation, while minimizing internal space and material usage.
Implementation Method 1
Eliminating the return means produces a panic bolt that is simpler to fit, more economic to produce and more reliable; the return movement may be obtained simply by the effect of gravity.
Data Source
AI summary
An anti-panic bar comprises a fixed part (3) with a lock controlling element (5), and a support bar (4) mounted to pivot on the fixed part (3) about a longitudinal axis. In an inactive position, the support bar (4) takes up a position spaced apart from the fixed part (3), and in an active position, the support bar (4) takes up a position closer to the fixed part (3) and also activates the lock controlling element (5). The support bar (4) is an extruded profile binged about the longitudinal axis through a pivot point (40).