Door Lock Clutch Spring Decoupling Mechanism
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Solution Overview
Problem
Existing door lock devices for escape and rescue routes lack a balance between high security and ease of handling, often requiring high actuation forces and risking unintentional unlocking.
Innovation Solution
A door lock device with a transmission system featuring a clutch spring and electric motor, where the clutch spring is charged and blocked by the motor, decoupling the actuating elements when locked, and coupling them when unlocked, ensuring secure locking and easy unlocking with authorized actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door lock device uses a direct mechanical coupling between the actuating handle and the door lock, then the unlocking function is simple and reliable, but high actuation forces are required and unintentional unlocking may occur
Solution Approach 1:
The patent introduces a clutch spring as an intermediary element between the actuating handle and the door lock. This clutch spring can be decoupled from the transmission device, creating a mechanical intermediary that prevents direct force transmission. When decoupled, it blocks unintentional unlocking while allowing controlled actuation through the actuating handle, thus resolving the contradiction between reliability and ease of operation.
Solution Approach 2:
The patent employs a dynamic coupling mechanism where the clutch spring can switch between coupled and decoupled states. This dynamic state change allows the system to adapt its mechanical connection based on operational requirements - providing strong coupling for intentional unlocking while enabling decoupling to prevent unintentional actuation, thereby balancing reliability and operational ease.
2Ease of operation
If the clutch spring is always coupled to the transmission device, then the door lock can be easily actuated, but security is reduced due to risk of unintentional unlocking
Solution Approach 1:
The clutch spring's coupling state is made dynamic rather than static. It can be intentionally decoupled through the actuating handle to enable easy actuation when needed, while remaining coupled during normal operation to prevent unintentional unlocking. This dynamic switching resolves the contradiction between ease of operation and security.
Solution Approach 2:
The clutch spring is positioned to potentially block the transmission path before unintentional actuation can occur. By being capable of decoupling, it creates a preliminary protective barrier that prevents unwanted unlocking forces from reaching the door lock, while still allowing authorized actuation to proceed when the clutch spring is intentionally engaged.
3Device complexity
If the actuating handle is directly connected to the door lock, then the transmission device is simple, but high forces are transmitted causing wear and potential malfunction
Solution Approach 1:
The clutch spring serves as a protective intermediary in the transmission path. It can absorb and block excessive forces before they reach the door lock mechanism, preventing wear and potential malfunction. This additional intermediary element, while increasing structural complexity, significantly improves reliability by protecting the transmission device from force-related damage.
4Reliability
If the clutch spring is decoupled from the transmission device, then security is improved by preventing unintentional unlocking, but the actuating handle cannot actuate the door lock
Solution Approach 1:
The system uses dynamic state switching of the clutch spring to resolve this contradiction. The clutch spring can be intentionally decoupled through the actuating handle to enable secure blocking of unintentional unlocking, while the same actuating mechanism can re-engage the clutch spring to restore the coupling and enable intentional door unlocking. This dynamic switching allows the system to alternate between security and operational states as needed.
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
Provides high security by preventing unintentional unlocking and reducing the need for high actuation forces, allowing for secure and efficient operation of the door lock.
Implementation Method 1
a clutch spring (1f) which can be switched and/or switched between the first transmission element (1a) and the second transmission element (1b)... the clutch spring (1f) is charged by the electric motor (1m) and the charged clutch spring (1f) is blocked when the blocking device (1e) is switched on
Data Source
Figure 1
Figure 2~4
Figure 5~6
AI summary
The device (7) has a transmission mechanism that converts a movement of a push bar (11) in a direction of a door leaf into a movement for actuating a door lock. The push bar is arranged on a sliding-type linear guide, and the guide axis of the linear guide extends perpendicular to the door leaf. The linear guide is equipped with multiple spaced-apart parallel guide bars (15). The push bar is coupled with an input of a rotary thrust converter, and the door lock is coupled with the output of the rotary thrust converter.