Spring-Biased Sliding Lock Latch for Automatic Engagement
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Solution Overview
Problem
Existing sliding door locking mechanisms, such as hook fasteners, are complex and require manual operation, making them cumbersome for users to open and close.
Innovation Solution
A sliding lock latch mechanism that automatically engages when the sash is closed, using a spring-biased latch bolt that locks into a retaining edge on the window frame, allowing the door to be opened by simply pushing the sash without the need for a handle or mechanical coupling, and can be easily released with a small actuating device like a release button.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hook fastener with rotary handle is used for locking, then the locking security is improved, but the device complexity and ease of operation deteriorate
Solution Approach 1:
The patent extracts the rotary handle and mechanical coupling mechanism from the locking system, retaining only the essential latch bolt and spring mechanism. The handle is completely removed, and the latch bolt is actuated directly by pushing the sash, simplifying the device while maintaining locking security through the automatic engagement of the latch bolt with the retaining edge.
Solution Approach 2:
The locking mechanism performs its own locking function automatically when the sash is closed. The spring-loaded latch bolt automatically engages with the retaining edge without requiring manual operation of a handle or knob. The system serves itself by using the closing motion of the sash to trigger the locking action.
2Reliability
If a hook fastener with rotary handle is used for locking, then the locking security is improved, but the ease of operation deteriorates
Solution Approach 1:
The rotary handle and mechanical coupling are completely removed from the system. Users simply push the sash to close and open it, without needing to grasp, rotate, or manipulate any locking mechanism. This extraction of unnecessary components dramatically improves ease of operation while the spring-loaded latch maintains secure locking.
Solution Approach 2:
The latch bolt automatically locks when the sash closes and automatically unlocks when the sash is pushed open. The spring mechanism provides automatic engagement and disengagement, eliminating the need for manual handling operations and making the system extremely easy to operate.
3Ease of operation
If a sliding latch bolt mechanism is used instead of hook fastener, then the ease of operation is improved, but the locking security may deteriorate
Solution Approach 1:
The latch bolt features a ramp surface (inclined plane) that guides the locking and unlocking action. When the sash is pushed closed, the ramp surface guides the latch bolt into engagement with the retaining edge. When pushed open, the ramp surface guides the latch bolt out of engagement, providing both security and ease of operation through geometric design.
Solution Approach 2:
The spring mechanism pre-loads the latch bolt in a ready-to-engage position. Before the sash even reaches the closed position, the latch bolt is already positioned to engage with the retaining edge, ensuring immediate and secure locking upon closure. The spring maintains constant readiness for engagement.
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
Simplifies the locking and unlocking process, reduces operational effort, and provides a secure and space-efficient locking solution suitable for both sliding and lift-and-slide doors, enhancing user convenience and door tightness.
Implementation Method 1
the lock latch being held by means of a spring device is biased into the extended locking position
Data Source
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AI summary
A sliding element comprises an outer frame, a sash which can be displaced relative to the outer frame, and a lock device for selectively locking the sash to the outer frame. The lock device comprises a lock latch which is mounted on the outer frame or on the sash so as to be displaceable between a retracted release position and an extended locking position and which is designed for latching engagement with a retaining edge arranged on the other element constituted by the outer frame or sash. The lock latch is preloaded into the extended locking position by means of a spring device.