Push Bar Latch Control Device with Electromagnet Locking Hook
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Solution Overview
Problem
Existing push bar latches lack an effective enter control function, which is essential for secure access management, as they primarily focus on convenience rather than security.
Innovation Solution
A control device comprising a base frame with a sliding slot, a control connecting rod, a locking hook, an electromagnet, and a release element with a push rod and spring, allowing for controlled locking and unlocking by energizing or de-energizing the electromagnet to engage or disengage the hook portion with a positioning pin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a control device is added to the push bar latch to provide enter control function, then security is improved, but device complexity increases
Solution Approach 1:
The patent combines the electromagnet, locking hook, positioning pin, and release element into a single integrated control device that attaches to the existing push bar latch. This merging approach provides enter control functionality while minimizing the increase in overall device complexity by utilizing and integrating with the existing latch structure rather than adding a completely separate control system.
Solution Approach 2:
The positioning pin serves as an intermediary element that mediates between the electromagnet/locking hook assembly and the push bar latch mechanism. This intermediary component enables the control device to interface with the existing latch structure, allowing security control functionality to be added without requiring complete redesign of the original latch mechanism.
2Reliability
If the electromagnet is used to hold the locking hook for secure locking, then reliability is improved, but energy consumption increases
Solution Approach 1:
The electromagnet operates periodically rather than continuously - it is activated only when locking is required and de-energized when unlocking is needed. This periodic operation pattern provides reliable locking when needed while significantly reducing overall energy consumption compared to continuous operation, allowing the system to maintain security without excessive power consumption.
Solution Approach 2:
The release element with push spring provides self-service functionality by automatically releasing the locking hook when the electromagnet is de-energized. This self-service mechanism eliminates the need for additional energy-consuming components to actively control the unlocking process, reducing overall system energy consumption while maintaining reliable locking through the electromagnet's targeted operation.
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
Enables secure entry and exit control by locking the push bar latch when the electromagnet is energized and unlocking it when powered off, enhancing security while maintaining convenience for normal operation.
Implementation Method 1
an electromagnet, arranged on the base frame relative to the inner end section of the locking hook, and used for holding the inner end section of the locking hook
Implementation Method 2
the release element is a push rod and a push spring, when the electromagnet is powered off, the push spring pushes out the push rod to push the locking hook to release the hook portion from the hooking state
Data Source
AI summary
A control device for a push bar latch, comprising: a base frame having a sliding slot; a control connecting rod, the outer end is combined with an unlocking return unit of the push bar latch and the inner end has a positioning pin, the positioning pin is set through the sliding slot; a locking hook, the outer end has a hook portion relative to the positioning pin; an electromagnet, used for holding the inner end section of the locking hook, so let the hook portion enter a hooking state for the positioning pin; and a release element, used to release the hook portion from the hooking state for the positioning pin when the electromagnet is powered off. Whereby the push bar latch has the enter control function.