Break-proof Double Locking Cylinder Web Reinforcement
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Solution Overview
Problem
Existing security locking cylinders, particularly in the area of the web between housing halves, are vulnerable to breakage due to limited reinforcement, which restricts the range of rotation of the locking lug and compromises security against forced entry.
Innovation Solution
A small plate made of high-strength material, such as steel, is strategically positioned between the axis of the transverse bore and the locking lug, with recesses in the web that allow full engagement in housing halves, and anchored by pins and sleeves to distribute tensile forces evenly, enhancing the structural integrity and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a steel cable is anchored in the housing halves by press fit formations and bridges the recess for the locking lug, then security against breakage is improved, but the range of rotation of the locking lug is severely limited
Solution Approach 1:
The invention extracts the reinforcement function from a continuous steel cable structure and relocates it to discrete reinforcement elements (plates or rods) positioned only in the critical web area. This selective placement maintains strength where needed while eliminating interference with the locking lug's rotation path.
Solution Approach 2:
The reinforcement is applied locally in the critical web area between the housing halves rather than using a continuous cable throughout. The reinforcement elements are strategically positioned to strengthen the break-prone zone without extending into the locking lug's operational space, thus preserving rotational freedom.
2Strength
If spring tongues are inserted in a continuous recess that penetrates the web, then security against breakage is improved, but the space required for tumblers is reduced and anchoring becomes problematic
Solution Approach 1:
The continuous reinforcement structure is segmented into discrete elements (plates or rods) positioned only in the critical web area. This segmentation eliminates the need for a continuous recess through the web, preserving tumbler space and simplifying anchoring to localized points rather than requiring贯穿 the entire web structure.
Solution Approach 2:
The reinforcement is shifted from a two-dimensional continuous plate to a more compact three-dimensional arrangement using discrete elements with specific geometries (hook-shaped ends, lateral extensions) that achieve reinforcement without requiring extensive recesses, thereby preserving space for tumblers.
3Strength
If thin steel cables are inserted into longitudinal bores on the side of the tumblers and guided through the web, then security against breakage is improved, but the anchoring becomes problematic and the bridge is weakened
Solution Approach 1:
The invention introduces intermediary reinforcement elements (plates or rods with hook-shaped ends) that mediate between the housing halves and the web. These intermediaries provide reliable anchoring through hook-shaped recesses that engage with the housing, distributing forces effectively without creating weak points in the web structure.
Solution Approach 2:
The reinforcement system combines different material properties and structural forms - using high-strength steel plates or rods with specific geometries (hook-shaped ends, lateral extensions) rather than simple cables. This composite approach integrates structural reinforcement with anchoring functionality in a single element that strengthens the web without compromising its integrity.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A double locking cylinder (1) with two housing halves (2, 3) joined integrally via a bridge (4) has a plate (10, 22, 22', 35, 60, 71, 91, 84, 102) resting on the bridge (5) above a transverse bore (5) for a fastening screw. The two ends of the plate (10, 22, 22', 35, 60, 71, 91, 84, 102) engage in recesses (6, 6', 7) in the housing halves (2, 3) which are cut into the housing halves (2, 3) in line with the surface of the bridge (4). The plate (10, 22, 22', 35, 60, 71, 91, 84, 102) has a recess in the center towards the locking lug (50) (recess 17) and has bores at its ends (13, 14; 23, 24; 61, 62; 72; 90; 85, 86) through which pins (18, 18', 19, 73; 100) or sleeves (11, 12) engage, which are inserted into the housing halves (2, 3). The sleeves (11, 12) receive retainers such as springs (74) and housing pins (75) or core pins (76).Pins (25, 26, 27, 28; 63, 64; 80, 81, 82, 83), such as drill-resistant steel pins, can also penetrate the end of the plate (35, 60) on both sides in pairs.