Concealed Panic Door Latch Connecting Device Adjustment
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Solution Overview
Problem
Conventional concealed-type top or bottom latch devices for panic exit doors are difficult to install and require adjustments that can only be made after disassembling parts, leading to challenges in achieving proper latch projection and operation.
Innovation Solution
A connecting device with a draw rod, slide, and adjusting block system that allows for easy installation and adjustment of latch projections by moving the latch between extended and retracted positions, using an operative member to move the slide and adjusting block vertically, and an adjusting screw to fine-tune the latch position relative to the door.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If concealed type latch devices are used to provide aesthetically pleasing appearance, then appearance quality is improved, but installation difficulty increases
Solution Approach 1:
The connecting device is divided into separate modular components: a connecting member with first and second ends, a draw rod with sidewalls and interconnecting wall, a slide, and an adjusting block. This segmentation allows each component to be independently manufactured and assembled, simplifying installation while maintaining the concealed aesthetic appearance.
Solution Approach 2:
The adjusting block can be moved vertically along the draw rod to dynamically adjust the projection of the latch beyond the door face. This dynamic adjustment capability allows installation personnel to optimize latch positioning after assembly, making installation easier while preserving the concealed design's aesthetic quality.
2Reliability
If conventional connecting devices are installed to couple latch to operative device, then basic locking function is achieved, but installation complexity increases and adjustment is difficult
Solution Approach 1:
The adjusting block is pre-configured on the draw rod with sidewalls that can be positioned at different vertical locations. This preliminary configuration allows installation personnel to set the desired latch projection before final assembly, simplifying the installation process while ensuring reliable locking function.
Solution Approach 2:
The adjusting block acts as an intermediary element between the draw rod and the latch mechanism. It mediates the relationship between these components by providing adjustable positioning, which simplifies installation and allows for fine-tuning of latch projection without increasing overall device complexity.
3Reliability
If latch projection is adjusted after installation to ensure proper operation, then operational reliability is improved, but installation time increases and requires disassembly
Solution Approach 1:
The adjusting block is designed to be movable along the draw rod in the vertical direction, enabling dynamic adjustment of latch projection. This dynamic feature allows installation personnel to adjust latch positioning during the installation process itself, eliminating the need for disassembly and reducing installation time while ensuring proper operational reliability.
Solution Approach 2:
The adjusting block allows preliminary adjustment of latch projection before final tightening and completion of installation. This preliminary action enables optimization of latch positioning during installation rather than requiring post-installation adjustments that would necessitate disassembly, thereby reducing installation time while ensuring reliable operation.
Data Source
AI summary
A lock for a door includes a latch (128) to which an end of a connecting member (46) is operably coupled. A draw rod (48) is securely mounted to the connecting member (46) to move therewith. A base (32) is fixed to the door, and a slide (42) is slideably mounted to the base (32) in the vertical direction. An adjusting block (44) is fixed to the draw rod (48) to move therewith. An adjusting screw (446) is rotatably extended through the slide (42) and threadedly engaged with the adjusting block (44) so that movement of the slide (42) in the vertical direction causes movement of the adjusting block (44) and the connecting member (46) in the vertical direction and of the latch (128) between locking and unlocking positions. Rotation of the adjusting screw (446) causes movement of the adjusting block (44) and the connecting device (40) in the vertical direction to adjust the locking position of the latch (128) relative to the door (10).