Universal Dummy Cylinder with Breakable Guide Pins
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Solution Overview
Problem
Existing universal dummy cylinders for closing profile cylinder openings in locks or door fittings lack adaptability to varying installation situations, as they cannot be easily adjusted to fit different distances between openings.
Innovation Solution
A universal dummy cylinder design featuring guide pins with predetermined breaking points allows for length adjustment by separating sections, enabling on-site adaptation to specific installation scenarios, with optional hollow profile elements and notches for precise fitting, and a center piece for positive and non-positive fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a universal dummy cylinder is designed with fixed guide pins, then the manufacturing process is simple, but the adaptability to different installation situations is poor
Solution Approach 1:
The guide pin is divided into multiple sections by predetermined breaking points, allowing it to be segmented into different lengths. This segmentation enables the same basic cylinder design to adapt to various installation situations by breaking the guide pin at appropriate points, thus resolving the contradiction between adaptability and structural complexity.
Solution Approach 2:
Predetermined breaking points are pre-formed in the guide pin during manufacturing, but the actual breaking action is deferred to the installation phase. This preliminary preparation of breaking points allows for easy length adjustment without requiring complex adjustment mechanisms, thereby improving adaptability while maintaining relatively simple structure.
2Ease of operation
If the guide pin length is fixed during manufacturing, then the manufacturing precision is high, but the ease of operation during installation is reduced
Solution Approach 1:
The guide pin is designed with predetermined breaking points that divide it into standard length segments. During installation, the guide pin can be broken at the appropriate breaking point to achieve the required length. This segmentation approach maintains high manufacturing precision for each segment while providing ease of operation through simple breaking actions during installation.
Solution Approach 2:
The guide pin is designed as a disposable component that can be easily broken and discarded after use. The predetermined breaking points allow for simple one-time adjustment during installation without requiring precision adjustment mechanisms. The guide pin serves its function and is then replaced if needed, prioritizing ease of operation over long-term precision adjustment capability.
3Adaptability or versatility
If the dummy cylinder is designed for two-sided closing, then the closure completeness is high, but the adaptability to one-sided installation requirements is poor
Solution Approach 1:
The dummy cylinder is designed as a universal component that can function in both one-sided and two-sided closing applications. The same basic cylinder body and guide pin design can be used regardless of whether one or two cylinders are installed, providing multi-functionality. This universality resolves the contradiction by allowing the same simple structure to serve multiple installation configurations without requiring additional components.
Data Source
AI summary
The application relates to a universal dummy cylinder for closing at least one side of a profile cylinder opening in a lock or door, comprising a cylinder component (1) having a guide pin (2) and a locking element (3) arranged at its end, a cylinder counter-component (10) having a guide pin (11), and a central piece (15), wherein the guide pins (2, 11) are guided axially overlapping and displaceable relative to each other by the central piece (15) and can thus be fixed in a form-fit and force-fit manner, and wherein at least one of the guide pins (2; 11) has one or more predetermined breaking points (7; 14) for selectively shortening the length of the at least one guide pin (2; 11). (Fig. 1)