Sliding Door Electric Strike With Stationary Keeper Access Control
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Solution Overview
Problem
Existing door lock systems for sliding doors require significant modifications to the door frame to install electric strikes, increasing installation time and cost, and do not allow for controlled access using key fobs, key cards, or key pads.
Innovation Solution
An electric strike system with a rotatable keeper and actuating mechanism that allows the sliding door to be released from the door frame without modifying the cut-out pocket in the frame, using a solenoid-operated plunger and blocking member to control the keeper's movement between latched and unlatched positions, enabling access control through authentication devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a prior art electric strike with a rotatable keeper is used, then the door can be electrically secured, but the cut-out pocket in the door frame must be significantly enlarged requiring extensive modifications
Solution Approach 1:
Instead of rotating the keeper about a fixed axis parallel to the latch rotation (prior art), this invention rotates the hook latch about a fixed axis while the keeper remains stationary. This inversion of the rotational mechanism eliminates the need for a large cut-out pocket and extensive frame modifications.
Solution Approach 2:
The invention extracts the rotational movement from the keeper mechanism and transfers it to the hook latch mechanism. By taking out the rotation from the keeper, the strike body can be compact and fit within standard cut-out pockets without requiring enlargements.
2Ease of operation
If a standard strike is used with manual key lock, then the door can be secured, but controlled access using key fobs, key cards, or key pads is not possible
Solution Approach 1:
The strike body is designed to accommodate both manual operation (via thumb turn or key lock on the door) and electronic access control (via solenoid actuation). The universal design allows the same strike mechanism to work with multiple types of locking actuators, providing both simplicity and versatility.
Solution Approach 2:
The solenoid acts as an intermediary between the electronic access control system and the mechanical locking mechanism. When access is granted via key fob, key card, or key pad, the solenoid translates the electronic signal into mechanical motion to retract the hook latch, enabling controlled access while maintaining compatibility with manual operation.
3Adaptability or versatility
If the cut-out pocket is significantly enlarged to accommodate the electric strike, then the electric strike can be installed, but installation time and expense increase
Solution Approach 1:
The invention changes the geometric parameters of the strike body and keeper mechanism to fit within standard cut-out pocket dimensions. By optimizing the size and configuration of components, the strike can be installed in existing pockets without enlargement, significantly reducing installation time and expense.
4Ease of operation
If the keeper is rotatably mounted with clearance for rotation, then the keeper can engage and disengage, but the cut-out pocket must be enlarged
Solution Approach 1:
The invention inverts the operational mechanism: instead of the keeper rotating to engage/disengage, the hook latch rotates while the keeper remains stationary. This eliminates the need for rotational clearance in the strike body, allowing installation in standard-sized cut-out pockets.
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 system provides reliable and consistent release of the sliding door from the frame while maintaining frame integrity, allowing controlled access without the need for extensive frame modifications, reducing installation time and cost.
Implementation Method 1
The actuating mechanism includes a solenoid and a plunger selectively moveable between a first engaged position and a second released position
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
An electric strike for use with a sliding door is provided. The strike comprises a housing defining a cavity including first and second walls, each having first and second slots defined therein. A keeper is disposed within the cavity and movable between latched and unlatched positions. The keeper includes first and second ends, wherein each includes respective outwardly extending first and second keeper pins. The first and second keeper pins extending from each end of the keeper are disposed in the respective first and second slots. A blocking member is pivotably mounted to the housing and includes first and second portions. The second portion of the blocking member is engaged with the first keeper pin when the first portion of the blocking member is selectively engaged with a plunger of an actuating mechanism in the first engaged position to selectively maintain the keeper in the latched position.