Motor-Driven Locking Cylinder with Offset Shaft Drivers
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Solution Overview
Problem
Conventional locking cylinders for doors lack the option for motor-driven operation, relying exclusively on key or knob activation.
Innovation Solution
A locking system that incorporates an electric drive device with a motor driver and a lock driver, both axially offset on an adjusting shaft within the locking cylinder, allowing for motor-driven operation in addition to manual key or knob operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional locking cylinder is used with only key or knob operation, then the structure remains simple, but the functionality and versatility are limited
Solution Approach 1:
The locking cylinder is designed to accept multiple types of actuators (key, knob, and motor driver) that can all operate through the same adjusting shaft mechanism. The cylinder housing includes multiple recesses that can accommodate different actuator types, allowing a single locking cylinder design to support manual key operation, manual knob operation, and automated motor-driven operation, thereby achieving multi-functionality without requiring separate locking systems for each operation mode.
Solution Approach 2:
The locking cylinder is divided into functional segments: the cylinder housing, the adjusting shaft, the lock driver, and the actuator interface. This segmentation allows the core locking mechanism (adjusting shaft and lock driver) to remain simple while enabling different actuator types to be added or removed at the interface level. The motor driver is positioned as a separate actuator option rather than being integrated into the core mechanism, maintaining simplicity while adding versatility.
2Extent of automation
If a motor driver is added to the locking cylinder, then automated operation becomes possible, but the device complexity increases
Solution Approach 1:
The adjusting shaft serves as an intermediary element between the motor driver and the lock driver. The motor driver rotates the adjusting shaft, which in turn rotates the lock driver to actuate the locking mechanism. This intermediary approach allows automated motor-driven operation without requiring direct integration of the motor into the locking mechanism, thereby adding automation capability while minimizing increases in overall device complexity.
3Adaptability or versatility
If multiple drivers are arranged on the adjusting shaft, then both manual and motor-driven operation are enabled, but the manufacturing complexity increases
Solution Approach 1:
The lock driver and motor driver are arranged axially offset from each other along the adjusting shaft, utilizing the longitudinal dimension of the cylinder housing. This axial arrangement allows both drivers to be mounted on the same adjusting shaft without interfering with each other's rotational paths. The offset positioning enables manual key operation and motor-driven operation to occur independently through the same mechanism, achieving versatility while maintaining relatively simple manufacturing processes.
Data Source
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AI summary
A locking cylinder for a door is proposed, comprising a cylinder housing (62) extending longitudinally, an adjusting shaft (64) whose axis of rotation extends longitudinally within the cylinder housing (62), and a lock driver (68) fixedly mounted on the adjusting shaft (64) and adjustable in a recess (72) of the cylinder housing (62). A motor driver (70) is fixedly mounted on the adjusting shaft (64) and is longitudinally offset relative to the lock driver (68).