Sliding Door Latch with Dynamic Protrusion for Anti-Slam Protection
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Solution Overview
Problem
Sliding door and window latches face damage from forceful slamming and are vulnerable to intruder attempts to lift them off the latch hook, as existing anti-slam and anti-lift mechanisms are inadequate in preventing these issues.
Innovation Solution
A sliding door or window latch design featuring a strike with a latch engagement element, anti-lift formation, and anti-slam contact surface, along with a latch body that includes a latch housing, latch member, and a protrusion that extends to actuate an anti-slam mechanism, allowing the latch member to move only when the door or window is closed, thereby preventing vertical movement and engaging with the anti-lift formation to secure the latch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the latch hooks are extended from the latch body during forceful closing of the door, then the latch mechanism can be damaged, but allowing the hooks to extend freely enables normal latching operation
Solution Approach 1:
The protrusion is made movable between fully extended and partially extended positions, allowing the anti-slam mechanism to dynamically adjust its state based on door position. This dynamic configuration enables the latch to prevent damage during closing while maintaining normal latching operation when needed.
Solution Approach 2:
The protrusion acts as an intermediary element between the latch body and the strike. It mediates the interaction by making contact with the anti-slam contact surface on the strike, transmitting forces and enabling the anti-slam mechanism to function without directly interfering with the latch hooks' ability to engage with the strike aperture.
2Ease of manufacture
If the latch body is allowed to move vertically relative to the strike, then installation and adjustment are easier, but intruders can lift the latch off the latch hook
Solution Approach 1:
The anti-lift formation is pre-configured on the strike and the protrusion is pre-positioned on the latch body to engage with it. This preliminary arrangement ensures that once the latch is installed, vertical movement is automatically restricted without requiring additional adjustment or complex mechanisms, maintaining ease of installation while preventing lifting attacks.
3Reliability
If the anti-slam mechanism restricts motion of the latch hooks, then damage from slamming is prevented, but the latch cannot engage properly when the door is closed
Solution Approach 1:
The protrusion transitions from a fully extended position (providing anti-slam protection) to a partially extended position (allowing latch engagement). This dynamic transition, actuated by the door's movement and the spring mechanism, ensures that the anti-slam restriction is lifted automatically when the door approaches the closed position, enabling proper latch engagement without compromising protection during closing.
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 proposed latch mechanism effectively prevents damage from slamming and intruder attempts to lift the latch, ensuring secure closure and robust operation by allowing the latch to move only when the door or window is fully closed, thus enhancing the anti-slam and anti-lift functions.
Implementation Method 1
a protrusion that extends from the latch housing and is: movable between a fully extended position and a partially extended position; and biased to extend from the latch body to the fully extended position
Data Source
AI summary
A latch includes a protrusion that extends from a latch body. The protrusion moves from a fully extended position to a partially extended position when the door or window to which the latch is mounted is moved to a closed position. This movement of the protrusion disengages an anti-slam mechanism, allowing movement of a latch mechanism. Further, the partially extended protrusion engages in an anti-lift recess in the strike. Alternatively, the protrusion may extend from the strike and engage with an anti-lift recess in the latch body.