Multi-point Sliding Door Latch with Opposite Hooks
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Solution Overview
Problem
Existing sliding door locks lack sufficient strength and multiple connection points, making them vulnerable to forced entry and unsuitable for heavy doors, and often require complex and costly modifications for installation.
Innovation Solution
A multi-point sliding door lock with two hooks oriented in opposite directions that slide for attachment, providing enhanced strength and security by eliminating the possibility of tilting or lifting the door to disengage the hooks, and designed to fit standard door stile openings with a mechanism to prevent locking unless the door is closed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single hook latch is used, then the lock is simple and inexpensive, but the strength and resistance to forced entry are insufficient
Solution Approach 1:
The latch is divided into two separate hooks instead of using a single hook, allowing each hook to engage with the keeper plate independently. This segmentation increases the overall strength and resistance to forced entry while maintaining relative simplicity in the design.
Solution Approach 2:
Two hooks are combined into a single latch assembly that operates together, providing multiple connection points between the sliding door and the door jamb. This merging of multiple latching elements into one unit increases strength without requiring separate locking mechanisms.
2Reliability
If hooks are oriented in the same direction, then the latch structure is simple, but the door can be tilted or lifted to disengage the hooks
Solution Approach 1:
The two hooks are oriented in opposite directions (asymmetric arrangement) rather than the same direction. This asymmetric configuration prevents the door from being tilted or lifted to disengage the hooks, as the opposite orientations create a interlocking configuration that resists such movements.
3Strength
If a rotating hook mechanism is used, then the latch can be compact, but the sliding engagement mechanism provides greater strength
Solution Approach 1:
The latch uses a sliding engagement mechanism where the hooks can move between engaged and disengaged positions along the keeper plate. This dynamic sliding action provides greater strength and reliability compared to fixed rotating mechanisms, while the hooks remain relatively compact in their engaged position.
Data Source
AI summary
A multi-point sliding door latch intended to fit within standard sized opening in the stile of a sliding door. Preferably the latch has at least two hooks oriented in opposite directions that slide in a generally linear manner between an unlatched and latched position in response to rotation of a pair of actuators located within the latch housing. Preferably, the latch includes reinforcement blocks defining cavities with a portion of the hooks extending into the cavities when the hooks are in the latched position.