Lock Cylinder Assembly Tamper-Proof Knob Locking
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Solution Overview
Problem
Existing lock cylinder arrangements face challenges in securely integrating electromechanical actuating knobs with integrated electronics on both sides of the locking cylinder in a tamper-proof manner, particularly in ensuring that at least one actuating knob is firmly connected to the lock cylinder housing only after installation, and in enabling secure locking and unlocking mechanisms without active electronic components.
Innovation Solution
The design incorporates a channel system within the lock cylinder housing that uses a forend screw to lock actuating knobs, featuring a sliding joint between locking pins with inclined surfaces, and a compression spring to ensure secure locking and unlocking, allowing for easy assembly and tamper-proof encapsulation of both actuating knobs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a forend screw is used to fasten the lock cylinder to the lock, then the lock cylinder can be securely installed, but the actuating knobs cannot be firmly connected to the lock cylinder housing until after installation
Solution Approach 1:
The channel is pre-formed in the lock cylinder housing, extending from the forend screw threaded bore to the actuating element receiving opening. The locking member is pre-mounted in the channel, ready to engage with the actuating shaft. This preliminary preparation enables the locking function to be activated immediately when the forend screw is installed, eliminating the need for separate connection steps.
Solution Approach 2:
The forend screw serves multiple functions: it fastens the lock cylinder housing to the lock and simultaneously activates the locking mechanism for the actuating knobs through the channel and locking member. This multi-functionality resolves the contradiction by making the single fastening action sufficient for both installation security and actuating knob connection.
2Adaptability or versatility
If actuating knobs with electromechanical clutch are installed on both sides of the lock cylinder housing, then transponder-controlled access control is enabled, but the risk of manipulation increases
Solution Approach 1:
The actuating shaft is inserted into the actuating element receiving opening in the lock cylinder housing, and the locking member engages with the locking contour on the actuating shaft. This nested arrangement, where the actuating shaft is received within the housing and secured by the locking member, creates a tamper-proof encapsulation that prevents manipulation while maintaining the electromechanical functionality for transponder control.
Solution Approach 2:
The locking member acts as an intermediary between the forend screw and the actuating shaft. It translates the linear movement of the forend screw into the engagement of the locking contour, providing a secure mechanical connection that protects the electromechanical components from manipulation while enabling their controlled operation.
3Reliability
If a locking member is mounted in the channel to lock the actuating shaft, then the actuating knob can be securely locked, but the assembly complexity increases
Solution Approach 1:
The channel and locking member are integrated into the lock cylinder housing as a unified structure. The channel extends from the forend screw threaded bore to the actuating element receiving opening, and the locking member is mounted within this channel to engage the actuating shaft. This merging of components into a single integrated assembly reduces the number of separate parts and simplifies the overall structure while maintaining secure locking functionality.
Solution Approach 2:
The locking member is designed to be automatically actuated by the forend screw through the channel. When the forend screw is tightened, it directly drives the locking member to engage with the locking contour on the actuating shaft without requiring additional actuators or complex control mechanisms. This self-service design simplifies the locking mechanism while ensuring reliable security.
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 solution enables reliable and simple locking of both actuating knobs to the lock cylinder housing using a conventional forend screw, ensuring secure operation and easy assembly, while allowing for tamper-proof encapsulation and efficient electromechanical actuation for transponder-controlled access control.
Implementation Method 1
The locking element is acted upon by a spring in the direction of a groove of the actuating element. The spring presses the locking element into the locking position.
Implementation Method 2
The first and second locking pins are coupled to each other with a sliding joint or a ball joint. The inclined surfaces of the first and second locking pins are adjacent to each other.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A lock cylinder assembly (1) comprising: - a lock cylinder housing (2) having a locking bolt (5) pivotably mounted on the lock cylinder housing (2), a threaded bore (6) extending transversely through the lock cylinder housing (2) for receiving a locking bolt (18), and an actuating element receiving opening (21) extending from diametrically opposite end faces of the lock cylinder housing (2) to the locking bolt (5), and - two actuating knobs (3a, 3b) each having an actuating shaft (4a, 4b) adapted for insertion into the actuating element receiving opening (21) of the lock cylinder housing (2) with a coupling element (20) for coupling to the locking bolt (5), wherein the actuating shafts (4a, 4b) have a locking contour (7a, 7b) formed for locking the actuating shaft (4a, 4b) to the lock cylinder housing (2). having is described.The lock cylinder housing (2) has at least one channel (9, 10) leading from the faceplate screw threaded bore (6) to the actuating element receiving opening (21). At least one locking element (11, 12) is movably mounted in the channel (9, 10). The channel (9, 10) is adapted with its locking element (11, 12) to the locking contour (7a, 7b) of an associated actuating shaft (4a, 4b) of an actuating knob (3a, 3b) in order to displace the locking element (11, 12) by means of the screw (18) when a socket screw (18) is screwed into the socket screw threaded bore (6) and to lock an actuating shaft (4a, 4b) inserted into the actuating element receiving opening (21) by the locking element (11, 12) engaging the locking contour (7a, 7b) of the actuating shaft (4a, 4b).