Door Lock Inner Body Fixing Device Single Fastener Alignment
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Solution Overview
Problem
Existing door lock assembly methods are complex, leading to misalignment and potential operational issues due to the use of multiple fastening members and arbitrary torque application, which complicates the installation process and can result in abnormal operation or breakage.
Innovation Solution
A simple inner body fixing device for door locks featuring a first fixing part on the door surface, a second fixing part coupled to the inner body, and a third fixing part, with coupling parts and fastening members that allow for easy alignment and secure assembly using a single fixing member, such as a screw, to minimize misalignment and simplify installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple fastening members are used to assemble the inner body, then the assembly can be secured, but the structure becomes complex and misalignment occurs due to arbitrary torque application
Solution Approach 1:
Multiple fastening members are merged into a single integrated fastening member that spans across multiple fastening holes. This single member incorporates multiple fixing parts that engage with corresponding holes in different components, thereby securing the assembly of multiple parts while reducing the number of separate fastening members needed and simplifying the overall structure.
Solution Approach 2:
The single fastening member is segmented into multiple fixing parts along its length. Each fixing part corresponds to a specific fastening hole in different components (e.g., door body, bracket, inner body). This segmentation allows each part to be positioned precisely at required locations, ensuring proper alignment and secure attachment without the complexity of coordinating multiple separate fasteners.
2Reliability
If multiple fastening members are used to assemble the inner body, then the assembly can be secured, but the installation process becomes complicated and time-consuming
Solution Approach 1:
Multiple fastening operations are merged into a single installation process. The integrated fastening member with multiple fixing parts allows all components to be secured simultaneously by inserting one fastening member through multiple aligned holes, rather than sequentially installing multiple separate fasteners. This dramatically reduces installation time while maintaining secure assembly.
3Ease of manufacture
If arbitrary torque is applied during fastening, then assembly can be completed, but misalignment occurs and abnormal operation or breakage may result
Solution Approach 1:
The fastening holes are pre-positioned and pre-aligned in the respective components (door body, bracket, inner body) during manufacturing. The single fastening member is designed with fixing parts that correspond to these pre-aligned holes. This preliminary alignment ensures that when the fastening member is inserted, all components are automatically positioned correctly relative to each other, eliminating misalignment issues that would result from arbitrary torque application.
Data Source
AI summary
Provided is an inner body fixing device of a door lock. The inner body fixing device includes a first fixing part fixed on a surface of a door; a third fixing part coupled to the first fixing part; and a second fixing part provided between the first fixing part and the third fixing part and coupled to an inner body of the door, wherein a first coupling part of the first fixing part and a second coupling part of the third fixing part are configured to couple to each other, and the third fixing part is coupled to the second fixing part by a fixing member.