Concealed Multipoint Lock Door Stile Channel Design
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Solution Overview
Problem
The machining process for door panels with multipoint locks is inefficient, particularly in maintaining alignment and concealing the lock components, which complicates the integration of multipoint locks and decorative trims.
Innovation Solution
A door panel design featuring a frame with a channel on the interior surface of the stile to house the multipoint lock components, where a cover is attached to prevent insulating material from entering and guide the drive rods, allowing for efficient alignment and concealment of the lock components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If holes are drilled into the door panel from top and bottom edges to passage drive rods, then the multipoint lock is concealed when viewing the free edge of the door, but the machining process becomes inefficient and alignment maintenance becomes difficult
Solution Approach 1:
The door stile is segmented into a first portion and a second portion that are joined together. The channel is formed in the first portion, and the drive rod passages are formed in the second portion. This segmentation allows each portion to be machined independently with simpler operations, avoiding the complexity of drilling aligned holes through the entire stile, thereby improving machining efficiency while maintaining alignment through the joining interface.
Solution Approach 2:
The channel acts as an intermediary structure that receives and guides the drive rods. Instead of requiring precise through-holes drilled from both ends, the channel provides a dedicated pathway that simplifies the machining process. The channel can be formed using less precise machining operations compared to drilling aligned holes, thus improving manufacturing efficiency while the channel itself ensures proper alignment of the drive rods.
2Ease of manufacture
If decorative trim is applied to cover multipoint lock components on the free edge of the door, then the lock is concealed, but the trim must span the entire length from mortise box to auxiliary latches, increasing complexity
Solution Approach 1:
The multipoint lock components are extracted from the traditional location on the free edge of the door and relocated to the interior surface of the stile. Specifically, the mortise box and auxiliary latches are positioned on the interior surface, allowing them to be concealed by the door stile itself rather than requiring a long decorative trim. This extraction reduces the trim span and simplifies the overall structure.
Solution Approach 2:
The lock components are relocated from the horizontal dimension (free edge of the door) to the interior surface of the stile (vertical dimension). This dimensional change allows the door stile to serve as the concealing structure rather than requiring a long horizontal trim piece. The channel and cover system provides a compact concealment solution that reduces the aesthetic and structural complexity.
Data Source
AI summary
A door panel for use in a residential entryway includes a frame having a first stile, a second stile, a top rail connecting the first stile to the second stile, and a bottom rail connecting the first stile to the second stile. The door panel also includes a pair of opposing skins on respective faces of the frame. The first stile includes a channel along a length thereof on an interior longitudinal surface of the first stile. A cover is attached to the interior longitudinal surface of the first stile to at least partially seal the channel