Vertically Adjustable Electric Strike for Door Sag Alignment
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Solution Overview
Problem
Existing electric strikes for door closures with latch bolts often fail to align properly with the door frame, leading to misalignment and ineffective operation, especially when the door is not installed perfectly square or experiences sag, requiring modifications to the frame or dust box for proper alignment.
Innovation Solution
A vertically adjustable electric strike with dual ramps, including a slotted ramp element that can be securely positioned along the strike body, allowing for alignment with the latch bolt and dead latch, facilitating smooth egress and reducing installation complexity by eliminating the need for frame modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed electric strike is installed, then the device complexity is reduced, but the alignment precision with the latch bolt and dead latch deteriorates when the door is not installed perfectly square or experiences sag
Solution Approach 1:
The electric strike incorporates a vertically adjustable mechanism that allows the strike body to move relative to the faceplate along the vertical axis. This dynamic adjustment capability enables the strike to adapt to misalignment conditions caused by door sag or improper installation, maintaining proper alignment between the strike and the latch bolt without requiring complex reconfiguration of the entire locking system.
Solution Approach 2:
The invention changes the vertical position parameter of the strike body relative to the faceplate through an adjustment mechanism. By allowing the strike body to be positioned at different vertical locations, the system can compensate for misalignment issues and ensure proper engagement with the latch bolt, effectively resolving the contradiction between fixed installation simplicity and alignment precision.
2Adaptability or versatility
If the door is not installed perfectly square or experiences sag, then the installation flexibility is improved, but the alignment between the strike and latch bolt deteriorates
Solution Approach 1:
The vertically adjustable strike body allows the system to adapt dynamically to varying installation conditions. The adjustment mechanism enables the strike to compensate for door sag, improper squareness, or other misalignment issues that arise during installation, maintaining proper alignment between the strike and latch bolt while accommodating flexible installation practices.
Solution Approach 2:
The adjustment mechanism allows the installer to self-correct alignment issues without requiring complex modifications to the door frame or dust box. By providing a simple vertical adjustment capability, the system enables the installer to compensate for misalignment independently, maintaining alignment precision while preserving installation flexibility.
3Manufacturing precision
If vertical adjustability is added to the electric strike, then the alignment precision is improved, but the device complexity increases
Solution Approach 1:
The electric strike incorporates a vertically adjustable mechanism that allows the strike body to move relative to the faceplate along the vertical axis. This dynamic adjustment capability enables the strike to adapt to misalignment conditions caused by door sag or improper installation, maintaining proper alignment between the strike and the latch bolt without requiring complex reconfiguration of the entire locking system.
Solution Approach 2:
The invention changes the vertical position parameter of the strike body relative to the faceplate through an adjustment mechanism. By allowing the strike body to be positioned at different vertical locations, the system can compensate for misalignment issues and ensure proper engagement with the latch bolt, effectively resolving the contradiction between fixed installation simplicity and alignment precision.
4Reliability
If dual ramps are incorporated for latch bolt egress, then the operational reliability is improved, but the device complexity increases
Solution Approach 1:
The egress path for the latch bolt is divided into two separate ramps: a primary ramp on the strike plate and a secondary ramp within the housing. This segmentation allows each ramp to perform a specific function in the egress process, ensuring reliable operation by providing multiple pathways for the latch bolt to exit the strike cavity smoothly and rapidly.
Solution Approach 2:
The dual ramp system acts as an intermediary mechanism that facilitates the transition of the latch bolt from the locked position to the unlocked position. The ramps provide a controlled pathway that mediates the egress process, ensuring smooth and reliable operation by guiding the latch bolt through a predetermined exit path.
Data Source
AI summary
An electric strike which provides vertical adjustability of the position of the strike relative to the latch bolt in the closure with modification to the doorframe on the dust box. A ramp element in the strike housing is adjustable relative to the strike and is securable at the time of installation to align the center of the latch bolt and strike. The ramp element has a channel to allow entry and exit of a latch bolt having a dead latch. A keeper engages the dead latch and maintains it in a retracted position when the closure is locked and is released when the electric latch solenoid is energized.