Rotating Winged Latch Bolt for Sliding Door Lockset
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Solution Overview
Problem
Existing door locksets lack a special latch bolt that can hold in both extended and retracted positions by finger pressure and rotate 90 degrees to lock and unlock sliding doors, with a unique winged shape to catch within a strike plate, addressing the need for a versatile and secure locking mechanism.
Innovation Solution
A rotating winged latch bolt assembly within the lockset that can be cycled through four positions (vertical retracted, vertical extended, horizontal extended, and vertical extended) by combining finger pressure and doorknob/turn operations, featuring a winged shape to catch within the strike plate for locking and release for unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional latch bolt is used in a sliding door lockset, then the structure is simple and easy to manufacture, but it cannot hold in both extended and retracted positions by finger pressure and cannot rotate 90 degrees to lock and unlock the door
Solution Approach 1:
The latch bolt is designed to be dynamic rather than static, enabling it to rotate 90 degrees between vertical and horizontal positions. The vertical position allows the door to slide freely, while the horizontal position engages the winged ends with the strike plate to lock the door. This dynamic positioning capability provides multiple functional states (locked, unlocked, door pull) within a single component.
Solution Approach 2:
The rotating winged latch bolt serves multiple functions: it acts as a locking mechanism when rotated 90 degrees to engage the strike plate, serves as a door pull handle when in the vertical position, and can be held in intermediate positions by finger pressure. This multi-functionality eliminates the need for separate locking mechanisms and door pulls.
2Reliability
If a rotating winged latch bolt is implemented to catch within the strike plate, then security and locking capability are enhanced, but the device complexity increases
Solution Approach 1:
The latch bolt features asymmetric winged ends that are specifically shaped to engage with the strike plate geometry. The wings extend perpendicular to the bolt shaft and are designed to fit into corresponding recesses or slots in the strike plate, creating a positive mechanical lock that prevents unauthorized opening while maintaining structural efficiency.
Solution Approach 2:
The locking function and the door pull handle function are merged into a single rotating component. The same latch bolt that locks the door when rotated 90 degrees also serves as the door pull when in the vertical position, eliminating the need for separate handles and reducing overall system complexity despite the enhanced locking capability.
3Reliability
If the latch bolt is designed to rotate 90 degrees for locking, then the locking mechanism becomes more secure, but the ease of operation may be reduced
Solution Approach 1:
The rotating latch bolt provides multiple operational modes: it can be rotated 90 degrees for secure locking, held in vertical position for door pulling, or positioned in intermediate states for partial engagement. This versatility allows the same mechanism to handle different operational requirements without needing separate controls.
Solution Approach 2:
The latch bolt mechanism is designed to be self-sufficient, where the rotation and positioning of the single component accomplishes both locking and door pull functions without requiring additional actuators, motors, or control systems. The mechanical design itself provides the functionality through its geometry and movement capabilities.
Data Source
AI summary
Cylinder assembly with rotating winged latch bolt for sliding door lockset includes a special latch bolt that holds in an extended position and holds in a retracted position which alternates back and forth by pressing the latch bolt with your finger. The special latch bolt rotates ninety degrees by turning the doorknob, door handle, thumb turn, or coin turn and rotates back ninety degrees by turning the doorknob, door handle, thumb turn, or coin turn back. The special latch bolt has a special winged shape that catches within the strike plate when rotated ninety degrees and releases from the strike plate when rotated ninety degrees back. Also there is a special face plate or cylinder face plate with tabs or notches that serve as a two-position mechanical stop to prevent the latch bolt from over rotating beyond ninety degrees in either direction.