Adjustable Driving Member for Door Lock Latch Alignment
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Solution Overview
Problem
Existing door lock mechanisms face installation challenges due to the need for precise positioning of fixing holes, which can lead to improper alignment of the driving member, resulting in unreliable operation of the latch mechanism.
Innovation Solution
An adjustable driving member with a base portion and a pressing rod, featuring an engagement groove and teeth, allows for adjustable engagement with a connection member, enabling easy installation and proper alignment with the latch mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fixing holes are drilled at predetermined positions, then the outer operational device can be mounted to the door, but if the positions are incorrect, the driving member cannot be properly aligned with the pressing member, resulting in unreliable latch operation
Solution Approach 1:
The pressing rod is designed to be adjustable along the first axis within the engagement groove, allowing dynamic repositioning to compensate for incorrect fixing hole locations. This adjustability enables proper alignment between the driving member and pressing member regardless of installation variations, resolving the contradiction between ease of installation and reliability of operation.
Solution Approach 2:
The position of the pressing rod relative to the base portion can be changed by adjusting its location within the engagement groove. This parameter change allows the system to adapt to different installation conditions, ensuring reliable latch operation even when fixing holes are not precisely positioned.
2Reliability
If new fixing holes are drilled to correct installation errors, then proper alignment may be achieved, but the installation process becomes troublesome and time-consuming
Solution Approach 1:
The adjustable pressing rod eliminates the need to drill new fixing holes by allowing repositioning within the existing installation. The pressing rod can be moved along the first axis to achieve proper alignment, significantly reducing installation time and effort while maintaining reliable operation.
Solution Approach 2:
The driving member is segmented into a base portion and a detachable pressing rod. This segmentation allows the pressing rod to be independently adjusted or replaced, providing flexibility during installation without requiring modification of the base portion or重新drilling holes.
3Device complexity
If the driving member has a fixed structure, then the design is simple, but it cannot adapt to incorrect fixing hole positions, resulting in improper latch positioning
Solution Approach 1:
The pressing rod is designed with adjustability along the first axis, transforming the fixed structure into a dynamic one. This allows the driving member to adapt to various installation conditions while maintaining a relatively simple overall design. The engagement groove with lateral walls provides guided adjustment without complex mechanisms.
Solution Approach 2:
The engagement groove structure serves multiple functions: it guides the pressing rod, limits its movement range, and enables adjustment. This multi-functionality allows the driving member to handle both correct and incorrect fixing hole positions with the same basic structure, improving adaptability without significantly increasing complexity.
Data Source
AI summary
A driving member (44) for an outer operational device (13) of a door lock includes a base portion (440) engaged with a connection member (595). The base portion (440) includes an engagement groove (449) having teeth (450). The connection member (595) and the base portion (440) are movable between a releasing position and a push position when a handle (197) is pivoted. A pressing rod (442) is detachably engaged with the base portion (440) and includes an insertion block (446) received in the engagement groove (449), with teeth (447) of the insertion block (446) engaged with the teeth (450) of the base portion (440). The pressing rod (442) and the base portion (440) are jointly movable. The pressing rod (442) has a driving end (445) operatively connected to a pressing member (155) of a latch device (12) having a latch (124) operatively connected to the pressing member (155).