Universal Blind Cylinder Sleeve Pin Guide Mechanism
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Solution Overview
Problem
Existing universal dummy cylinders face challenges in adjusting the distance between locking parts to ensure flush closure and require manual screw tightening, which can be time-consuming and prone to parts being pushed too far into the profile cylinder opening.
Innovation Solution
The universal dummy cylinder features a sleeve-shaped guide portion and a pin-like guide portion that can be plugged together, with a radially prestressed locking element, such as a spiral spring or steel ball, to automatically lock the guide sections in a desired relative position without the need for additional handles or manual screw tightening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the two guide parts are plugged into one another and pushed together during assembly, then the distance between the two closure parts can be easily adjusted, but the parts can be pushed too far into the profile cylinder opening making flush closure difficult to achieve
Solution Approach 1:
The bearing edges are pre-positioned on the closure parts to contact the edges of the profile cylinder opening before final insertion. This preliminary contact point guides the insertion depth and prevents over-pushing, ensuring the closure parts achieve flush closure automatically when the bearing edges contact the opening edges.
Solution Approach 2:
The bearing edges act as intermediary elements between the closure parts and the profile cylinder opening. These edges provide a defined contact interface that mediates the insertion process, allowing easy adjustment while preventing excessive insertion depth that would compromise flush closure.
2Manufacturing precision
If a separate center piece with a screw is used to fix the two closure parts at a desired distance, then the distance can be precisely fixed, but the attachment process becomes time-consuming due to manual screw tightening
Solution Approach 1:
The two guide parts are designed to be self-locking through their plugged connection geometry. When the pin-like second guide part is inserted into the sleeve-shaped first guide part and pushed together, the connection automatically locks without requiring manual intervention for tightening, making the system self-servicing and eliminating time-consuming screw operations.
Solution Approach 2:
The adjustment and locking functions are merged into a single integrated operation. The plugged connection design combines the distance adjustment mechanism with the locking mechanism, allowing both functions to be achieved simultaneously in one action rather than requiring separate adjustment and fixation steps.
3Ease of operation
If the locking parts are brought too close together during assembly, then the assembly process is simplified, but the locking parts are no longer flush with the profile cylinder opening edge and cannot be easily separated
Solution Approach 1:
The guide parts are designed with dynamic adjustment capability during assembly. The plugged connection allows the operator to push the parts together to the desired distance and then lock them in place, providing both ease of assembly and adjustability. The bearing edges ensure that regardless of the pushing force applied, the final position achieves flush closure when the edges contact the opening.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design allows for easy and quick attachment of the universal dummy cylinder, preventing parts from being pushed too far into the profile cylinder opening and ensuring a flush closure without manual effort, while also simplifying removal and maintaining fire resistance.
Implementation Method 1
at least one locking means is provided via which two guide sections can be locked automatically in an assumed relative position... at least one locking element which is pretensioned in a substantially radial direction in relation to the longitudinal axis of the universal dummy cylinder
Data Source
Figure 1A
Figure 1B~1C
Figure 2
AI summary
The invention relates to a universal blank cylinder (1, 1*) for closing profile cylinder openings in locks and doors, which has at least two guide parts (2a, 2b; 2a*, 2b*) that are movable relative to each other along a longitudinal axis of the universal blank cylinder (1, 1*) in order to be able to adjust the distance (L1, L2) of two locking parts (5a, 5b) of the universal blank cylinder (1, 1*) to each other.According to the invention, it is particularly proposed, for ease of assembly, that one of the guide parts (2a*, 2b*) forms a first sleeve-shaped guide section (22a*) and the other guide part (2b*) has a second pin-like guide section (22b*) which is slidably held in the first sleeve-shaped guide section (22a*) along the longitudinal axis of the universal dummy cylinder (1*), and/or that at least one pretensioning means (4) is provided by which the two guide parts (2a, 2b; 2a*, 2b*) are pretensioned into a relative position to each other in which they assume a maximum possible distance (L1) from each other. A further aspect of the present invention relates to a method for attaching a universal dummy cylinder (1, 1*) to a lock or a door.