Asymmetric One-Piece Door Plate for Universal Hinge Adaptation
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Solution Overview
Problem
The existing locking device for doors, with a two-part design featuring a base plate and attachment plate, is cumbersome to assemble and disassemble, requires additional holes in the door leaf for attachment, and has an expensive thrust plate with two toothed areas.
Innovation Solution
A one-piece door plate with a peripheral raised edge and a recess that accommodates the handle, where the trough is inserted into the recess, eliminating the need for separate base and attachment plates and additional holes, and allowing for a simpler assembly process, with a guide channel for the push plate that can be rotated 180 degrees for conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a two-part door plate design (base plate and mounting plate) is used, then the locking device can accommodate both left- and right-hinged doors, but the assembly and disassembly process becomes particularly cumbersome
Solution Approach 1:
The patent combines the base plate and mounting plate into a single integrated door plate structure. The door plate contains both the handle recess area and the lateral extension area in one piece, eliminating the need for separate base plate and mounting plate components. This merging simplifies assembly to a single insertion operation while maintaining the ability to serve both left- and right-hinged doors through rotational installation.
Solution Approach 2:
The single door plate design performs multiple functions: it serves as both the base plate and mounting plate, provides the handle recess, contains the guide channel for the sliding plate, and can be installed in either orientation for left- or right-hinged doors. The circumferential raised edge and projection structure enable universal application across different door configurations.
2Ease of manufacture
If a two-part door plate design with separate base plate and mounting plate is used, then the locking device can be assembled, but additional mounting holes are required in the door leaf
Solution Approach 1:
The integration of base plate and mounting plate functions into a single door plate component eliminates the need for separate mounting operations. The door plate's projection inserts directly into the door leaf opening and is secured with caps, removing the requirement for additional mounting holes that would be needed for separate base plate and mounting plate attachment.
3Adaptability or versatility
If a symmetric sliding plate with two toothed sections is used, then the locking device can function with both door configurations, but the manufacturing cost increases
Solution Approach 1:
The sliding plate is designed with a single toothed section rather than two symmetric toothed sections. The guide channel is positioned asymmetrically within the door plate, allowing the sliding plate with one toothed section to engage correctly. When the door stop configuration changes, the entire door plate assembly is rotated 180 degrees, repositioning the guide channel and sliding plate orientation accordingly, eliminating the need for a symmetric two-toothed sliding plate design.
Data Source
Figure 1~2
Figure 3
AI summary
The closure device has a door plate (14) with two door plate areas (16,18), where the integrally formed door plate has an upright edge (15) that is engaged with a door leaf (10) and a recess (17) for forming the former door plate area. The recess is adapted to a cavity (19) that incorporates the handle in a retractable assembly. The height of the wall of the door plate enclosing the recess in the former door plate area is measured greater than the height of an edge projection (30) of the cavity engaging in the recess.