Lock Cylinder Stator Bit Mounting for Simplified Assembly
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Solution Overview
Problem
Existing lock cylinders are complex and difficult to produce due to intricate assembly requirements, particularly the meshing parts, which complicate the production and assembly of the bit on the stator, while also lacking robustness against break-in attempts.
Innovation Solution
A lock cylinder design where the bit is mounted in rotation on the stator, utilizing ribs and grooves for enhanced solidity and a flange on the rotor to prevent damage during drilling, and employing an electronic mechanism to move the blocking member between locked and unlocked positions, simplifying the assembly and production by eliminating the need for meshing parts and enhancing resistance to break-in attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the bit is mounted on the rotor with meshing parts, then the bit can be driven in rotation, but the assembly becomes complex and difficult to produce
Solution Approach 1:
The invention extracts the meshing part from the system by mounting the bit directly on the stator instead of on the rotor. This eliminates the complex meshing mechanism while still allowing the bit to be driven in rotation through the rotor's interaction with the stator's annular faces.
Solution Approach 2:
Instead of mounting the bit on the rotor as in conventional designs, the invention inverts the mounting location by fixing the bit on the stator. This reversal simplifies the overall assembly by eliminating the need for complex meshing parts between the bit and rotor.
2Reliability
If the rotor is made vulnerable to drilling, then the lock can be simpler, but the robustness against break-in attempts decreases
Solution Approach 1:
The invention provides beforehand cushioning by mounting the bit on the stator rather than the rotor. This pre-positioning ensures that if the rotor is drilled or damaged during a break-in attempt, the bit remains intact and functional on the stator, maintaining the lock's robustness without requiring additional protective structures on the rotor.
3Strength
If multiple meshing parts are used to assemble the bit on the stator, then the bit can be securely mounted, but the production and assembly process becomes more complex
Solution Approach 1:
The invention merges the bit mounting function directly onto the stator structure, eliminating the need for separate meshing parts. The stator's annular faces are designed to directly support and rotate the bit, combining multiple functions into a single integrated structure that maintains security while simplifying production.
4Ease of operation
If the bit protrudes inside the longitudinal hole, then the rotor can be driven, but the rotor becomes vulnerable to damage during drilling attacks
Solution Approach 1:
The invention extracts the bit from the rotor structure and relocates it to the stator. This separation ensures that the bit does not protrude into the rotor's longitudinal hole, making the rotor vulnerable to drilling. Instead, the bit remains protected on the stator while still being driven in rotation through the rotor's interaction with the stator's annular faces.
Data Source
AI summary
Lock cylinder comprising: - a cam (24) having third and fourth annular faces directly bearing on, respectively, first and second annular faces of a stator to form a pivot link between the cam and the stator, this cam being systematically fixed, without any degree of freedom in rotation on the rotor (52), - an electronic mechanism (76) capable of moving a locking member (80) of the rotor from its blocked position to its retracted position in response to the insertion of an authorized key into any of the inner and outer channels and, on the contrary, of maintaining the locking member in its blocked position in response to the insertion of an unauthorized key into any of the inner and outer channels.