Door Strike with Segmented Keeper Mechanism
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Solution Overview
Problem
Existing door strikes consume significant power and have a short battery lifespan, and require cuts in the door frame for installation, which can be impractical in cases where space is limited.
Innovation Solution
A door strike design featuring a plate-mounted keeper system with followers and bolts, powered by an electric actuator that only consumes energy when switching between locked and unlocked modes, allowing the door to be opened without continuous power consumption and avoiding frame cuts through surface mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing door strikes use electric current to maintain the unlocked position, then the door can be remotely controlled to switch between locked and unlocked modes, but the power consumption is significant and battery lifespan is shortened
Solution Approach 1:
The door strike uses periodic action by only consuming power during the brief moment of mode switching (locked to unlocked or unlocked to locked). The electric actuator is activated temporarily to change the state of the bolts, and once the switching is complete, power consumption drops to zero. This is achieved through the mechanical latching mechanism where bolts physically engage or disengage from keepers, maintaining the state without continuous electrical power.
2Reliability
If existing door strikes require cuts in the door frame for installation, then the door strike can be securely installed, but the installation becomes impractical when the door frame lacks sufficient space
Solution Approach 1:
The door strike is segmented into multiple functional components: a mounting plate for attachment to the door frame, bolts for engaging the latch, keepers for defining the engagement position, and an electric actuator for operation. This segmentation allows the device to be mounted as a surface-mounted assembly without requiring cuts in the door frame, while still achieving secure installation through the combined action of these components.
3Ease of manufacture
If the door strike is made slim and surface-mounted, then it can be installed without cutting the door frame, but the structural complexity increases to achieve the same security function
Solution Approach 1:
The door strike uses intermediary mechanical elements (bolts and keepers) that mediate between the electric actuator and the door latch. The bolts act as intermediaries that physically block or allow the latch to engage with the frame, while keepers define the precise engagement position. This intermediary mechanism enables a slim surface-mounted design to achieve the same security function as traditional cut-in strikes.
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
This design extends the lifespan of power supplies and allows for installation without modifying the door frame, as it only uses power to switch modes and maintains the unlocked state without continuous electricity usage.
Implementation Method 1
an electric actuator... upon being powered by electric current, to cause, via the one or more parts, the first bolt to disengage the first keeper to allow the first keeper to rotate
Data Source
AI summary
A door strike is provided. The door strike includes a plate, a first keeper and a second keeper mounted onto the plate, the first keeper and the second keeper to stop a door latch when the first keeper and the second keeper are prevented from rotating, a first follower designed to engage the first keeper, a second follower designed to engage the second keeper, a first bolt designed to prevent the first follower from being rotated, and a second bolt designed to prevent the second follower from being rotated, one or more parts designed to move the first bolt and the second bolt, and an electric actuator designed to cause, via the one or more parts the first bolt to disengage the first keeper to allow the first keeper to rotate and the second bolt to disengage the second keeper to allow the second keeper to rotate.