Vehicle Door Cylinder Lock Single Screw Fastening
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Solution Overview
Problem
Existing locking devices for vehicle doors and hatches require multiple components and a large installation space, leading to high production and assembly costs, while also being inflexible for different framework conditions.
Innovation Solution
A locking device with a single screw that serves both for fastening and securing the cylinder lock, featuring multiple threaded holes and radial depressions to accommodate different positions, allowing for reduced component count and adaptability to various door configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple screws and components are used to fasten and secure the cylinder lock, then security and reliability are improved, but device complexity and production costs increase
Solution Approach 1:
The patent combines the fastening function and security function into a single screw component. The screw simultaneously fastens the cylinder lock to the door and provides security through its engagement with the locking mechanism, eliminating the need for multiple separate components while maintaining both reliability and security.
Solution Approach 2:
The single screw is designed to perform multiple functions: it acts as both a fastening element to attach the cylinder lock to the door structure and as a security element that engages with the locking mechanism. This multi-functionality reduces component count while maintaining security and reliability.
2Reliability
If multiple screws and components are used to fasten and secure the cylinder lock, then security and reliability are improved, but production and assembly costs increase
Solution Approach 1:
By merging the fastening and security functions into a single screw, the patent reduces the number of parts that need to be manufactured, inventoried, and assembled. This simplification directly reduces production costs and assembly time while maintaining the required security level through the screw's dual-function design.
3Device complexity
If a single screw is used for both fastening and securing, then device complexity and production costs are reduced, but security against forced opening may be compromised
Solution Approach 1:
The screw is specifically designed with multi-functionality, where its structure allows it to simultaneously provide fastening and security against forced opening. The screw's engagement with both the door structure and the locking mechanism ensures that security requirements are met even with a single component.
Solution Approach 2:
The patent optimizes the screw's physical parameters (such as its dimensions, thread configuration, and engagement geometry) to ensure that a single screw can provide adequate security against forced opening while maintaining fastening functionality. These parameter changes allow the single screw to compensate for the reduced component count.
4Adaptability or versatility
If multiple threaded holes and radial depressions are provided for different screw positions, then adaptability to different door configurations is improved, but device complexity increases
Solution Approach 1:
The bracket element is designed with multiple threaded holes and radial depressions that serve a dual purpose: they provide adaptability to different door configurations and seal positions, while also serving as integration points for the single screw to perform both fastening and security functions. This multi-functionality allows the same structural features to support both adaptability and the simplified single-screw design.
Data Source
Figure 1~2
Figure 3~5
AI summary
The invention relates to a locking device (2) for a door (1) or flap, in particular of a vehicle, with a cylinder lock (6) comprising a cylinder bushing (7) and a cylinder core (8) rotatably mounted in the cylinder bushing (7), with a bearing bracket (3) attachable or fixed to the door (1) or flap, which has a receptacle (5) for the cylinder lock (6), and with a screw (10) which establishes a mechanical connection of the cylinder bushing (7) with a trim element (26) for the door (1) or flap, wherein a bracket element (9) is provided which at least partially radially surrounds the cylinder bushing, which is slidably mounted on the bearing bracket (3) and has at least one engagement means (20''') for engaging in a recess (22) of the cylinder bushing (7).It is provided that the screw (10) cooperates with one of at least two threaded bores of the bracket element (9) to displace it, wherein the cylinder bushing (7) has a radial recess (18) assigned to each of the threaded bores, which forms a pressure surface (17), wherein the screw (10) has a pressure tip (13) at its end facing the cylinder bushing (7), which is inserted into the respective radial recess (18) and cooperates with the pressure surface (17) to provide axial and radial support for the screw (10).