Pushbar Exit Device With Integrated Credential Control
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Solution Overview
Problem
Existing access control systems for buildings require multiple equipment installations, including power supplies and credential readers, which can be costly and impractical for older facilities without readily available power lines.
Innovation Solution
An exit device system with an integrated pushbar assembly and control system that operates an electronic driver to move a blocking member based on credential reader information, eliminating the need for separate power supplies and credential readers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional access control devices are installed, then access control functionality is achieved, but multiple separate equipment installations are required increasing cost and complexity
Solution Approach 1:
The patent combines multiple separate access control components (credential reader, power supply, controller, and exit device) into a single integrated unit. The credential reader and controller are housed together with the exit device mechanism, eliminating the need for separate equipment installations while maintaining all necessary access control functions.
Solution Approach 2:
The integrated device performs multiple functions within a single unit: it reads credentials, processes access control logic, powers electronic components, and actuates the exit device mechanism. This multi-functional design replaces what would traditionally require four or more separate devices.
2Productivity
If multiple separate equipment installations are performed, then complete access control system is achieved, but installation time and cost increase
Solution Approach 1:
By merging multiple components into a single pre-assembled unit, the installation process is simplified from requiring multiple separate installations to a single installation event. This reduces both the time required for installation and the number of labor hours needed.
3Adaptability or versatility
If line-powered access control devices are used, then reliable power supply is achieved, but installation becomes infeasible in facilities without readily available power lines
Solution Approach 1:
The patent replaces the traditional line-powered electrical system with a battery-powered system. This substitution eliminates the requirement for nearby power lines and electrical outlets, allowing installation in locations that would otherwise be inaccessible to traditional line-powered access control devices.
Solution Approach 2:
The power supply parameter is changed from requiring external electrical power lines to using an internal battery system. This parameter change enables the device to operate independently of the building's electrical infrastructure, greatly expanding installation flexibility.
Data Source
AI summary
An exemplary exit device system includes a pushbar assembly and a control system. The pushbar assembly includes a latch having an extended position and a retracted position, a blocking member having a blocking position in which the blocking member retains the latch in the extended position and an unblocking position in which the blocking member permits the latch to move to the retracted position, a pushbar operable to move the blocking member between the blocking position and the unblocking position, and an electronic driver operable to move the blocking member between the blocking position and the unblocking position. The control system is configured to operate the electronic driver to electrically move the blocking member between the blocking position and the unblocking position based upon information received from a credential reader.