Adjustable Panic Door Lock Mechanism for Latch Bolt Retraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing driving mechanisms for panic door locks often fail to function properly when installed in positions with spacing between the draw member and the retractor, leading to incomplete retraction of the latch bolt and requiring troublesome reinstallation.
Innovation Solution
An adjustable driving mechanism is introduced, featuring a linking rod with a slot and a draw member with a guide slot, along with an adjusting member that allows the position of the draw member relative to the retractor to be adjusted by rotating a threaded shank, eliminating idle travel and ensuring the latch bolt can be fully retracted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the driving mechanism is installed in a position with spacing between the draw member and the retractor, then the installation is easier and more flexible, but the latch bolt cannot be fully retracted and the door operation is adversely affected
Solution Approach 1:
The patent applies the dynamics principle by making the draw member adjustable in position along the linking rod. The draw member can be moved dynamically to different positions using an adjusting mechanism (threaded rod and nut assembly) to eliminate spacing issues and ensure proper engagement with the retractor, thereby maintaining both installation flexibility and reliable latch bolt retraction
Solution Approach 2:
The patent applies parameter changes by altering the position parameter of the draw member relative to the linking rod. Through the adjusting mechanism, the distance between the draw member and retractor can be modified to eliminate idle travel, ensuring that the draw member properly engages the retractor while maintaining installation flexibility
2Reliability
If the draw member is positioned to eliminate spacing, then the latch bolt retracts properly, but the installation becomes more complex and time-consuming
Solution Approach 1:
The adjusting mechanism allows the draw member position to be dynamically modified after installation. This eliminates the need for complex pre-positioning or reinstallation procedures, as the position can be easily adjusted using a simple threaded rod and nut assembly, thereby maintaining installation simplicity while ensuring reliable latch bolt retraction
Solution Approach 2:
The adjusting mechanism enables the installer to self-correct positioning issues without requiring specialized tools or expertise. The threaded rod and nut assembly provides an intuitive, self-explanatory adjustment system that allows the installer to eliminate spacing and ensure proper engagement independently
3Adaptability or versatility
If the draw member travels through spacing, then the installation position is flexible, but the door operation requires troublesome reinstallation
Solution Approach 1:
The adjustable draw member position allows the mechanism to adapt to different installation positions while ensuring proper operation. The draw member can be positioned to eliminate idle travel regardless of where the linking rod is installed, thereby maintaining installation flexibility while ensuring smooth and reliable door operation without requiring reinstallation
Data Source
AI summary
A door lock includes a bracket fixed to a door. A linking rod is slideably mounted to the bracket and includes a slot. A draw member includes a first end pivotably connected to the bracket and a second end operably connected to a retractor. The draw member further includes a guide slot. A pin slideably extends through the slot and the guide slot such that the movement of the linking rod causes pivotal movement of the draw member, which in turn, urges the retractor to move a latch bolt from an extended position to a retracted position. A follower is coupled to the pin to move therewith. An adjusting member is in threading connection with the follower and rotatable to move the follower and the pin relative to the linking rod to adjust a position of the second end of the draw member relative to the retractor.