Panic Exit Door Lock Outer Operational Device with Asymmetric Burglarproof Mechanism
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Solution Overview
Problem
Panic exit door locks with top and bottom latches for burglarproof purposes require troublesome installation on differently handed doors and lack a standalone burglarproof function.
Innovation Solution
An outer operational device with a handle and limiting member that provides a burglarproof function by allowing normal locking/unlocking operations while the limiting member is in the release position, and prevents rotation of the handle when moved to the blocking position, coupled with a panic exit door lock mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a door latch assembly with top and bottom latches is used for burglarproof purposes, then security is improved, but installation complexity increases when mounting to differently handed doors
Solution Approach 1:
The outer operational device incorporates asymmetric components including a non-circular engaging portion on the handle shank and a corresponding non-circular connecting hole in the actuating member. This asymmetric design provides a standalone burglarproof function while enabling easy installation on differently handed doors through simple rotation of the handle without complex adjustment procedures
Solution Approach 2:
The outer operational device is designed to perform multiple functions: it serves as both a locking mechanism and a burglarproof device. The limiting member can be positioned to block or allow handle rotation, providing security control. The device can be mounted on either handed door with the same basic installation procedure, making it universal across different door configurations
2Device complexity
If a door latch assembly is used without a standalone burglarproof function, then device complexity is reduced, but security capability is insufficient
Solution Approach 1:
The patent merges the locking mechanism and burglarproof function into a single integrated outer operational device. The limiting member, which can be positioned to block or allow handle rotation, is incorporated directly into the device structure. This integration provides standalone burglarproof capability without requiring separate locking and security systems, thus not increasing overall device complexity
3Ease of operation
If the handle is made rotatable for unlocking operation, then ease of operation is improved, but security is compromised when in blocking position
Solution Approach 1:
The outer operational device features a dynamic limiting member that can be positioned between two states: a blocking position that prevents handle rotation for security, and a release position that allows handle rotation for easy unlocking operation. The actuating member with non-circular connecting hole enables the limiting member to be dynamically repositioned based on security requirements, providing both security control and ease of operation as needed
Data Source
AI summary
An outer operational device includes a cover mounted to a side of a door. An actuating member is mounted in the cover and includes an end engaged with a handle to rotate therewith. A sliding member is slideably received in the cover and operably connected to the actuating member, so that the sliding member slides when the actuating member rotates. A limiting member is pivotably received in the cover between a blocking position not allowing movement of the sliding member and a release position allowing movement of the sliding member. The handle is rotatable when the limiting member is in the release position. The handle is not rotatable when the limiting member is in the blocking position. A key-operable lock core is operably connected to the actuating member, so that the limiting member can be moved to the blocking position to provide a burglarproof function.