Locking Drive With Precharged Springs For Quiet Actuation
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Solution Overview
Problem
Existing motorized locking drives for windows and doors operate quickly but generate disruptive noise due to high motor speed, which is undesirable for quick and quiet operation.
Innovation Solution
A locking drive system that utilizes preloaded mechanical energy storage devices, controlled by a motorized drive unit, to perform locking and unlocking operations at standstill, minimizing noise by using stored energy for initial actuation and allowing motor-driven precharging without time pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the motor drive unit operates at high speed to achieve quick locking or unlocking, then the locking or unlocking speed is improved, but noise increases
Solution Approach 1:
The patent pre-charges energy storage devices (springs) in advance during periods when noise is not an issue, storing mechanical energy that can be released instantly when locking or unlocking is required. This allows the actual locking/unlocking action to occur without motor operation, eliminating noise during the critical moment while maintaining speed.
Solution Approach 2:
The locking drive system is divided into separate functional components: a motor drive unit for energy accumulation, energy storage devices for energy retention, and a mechanical transmission system for energy release. This segmentation allows each component to operate optimally - the motor runs slowly during pre-charging, while the actual locking/unlocking uses stored energy without motor involvement.
2Loss of time
If the motor drive unit operates continuously at high speed for immediate locking or unlocking, then the response time is reduced, but energy consumption and heat generation increase
Solution Approach 1:
The system performs energy accumulation in advance by pre-charging the energy storage devices during idle periods or when the window is in a stable state. This preliminary action ensures that when locking or unlocking is triggered, the mechanical energy is already available for immediate release, eliminating waiting time without requiring continuous high-speed motor operation.
Solution Approach 2:
The energy storage devices (springs) serve themselves by storing mechanical energy that can be autonomously released when needed. Once pre-charged, the system can perform locking or unlocking operations using stored energy without immediate motor intervention, reducing overall energy consumption while maintaining rapid response capability.
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
Enables rapid and quiet automatic locking and unlocking of window or door sashes with minimal noise, reducing waiting times and simplifying the actuation process compared to conventional handles.
Implementation Method 1
a locking spring unit (14) that can be preloaded by the motorized drive unit (12) and / or an unlocking spring unit (16) that can be preloaded by the motorized drive unit (12)
Data Source
Figure 1~3
Figure 4~5
AI summary
A locking drive for locking and unlocking a sash of a window, door or the like comprises a motorized drive unit, a locking energy storage device, in particular mechanical, which can be pre-charged via the motorized drive unit and coupled to a locking fitting associated with the sash for locking the sash, a unlocking energy storage device, in particular mechanical, which can be pre-charged via the motorized drive unit and coupled to the locking fitting for unlocking the sash, and a control device.The motor drive unit can be controlled via the control device in such a way that the discharge of a respective pre-charged energy storage device can be triggered in such a way that, in order to lock the wing with the motor drive unit stationary, the energy stored in the pre-charged locking energy storage device first triggers the discharge of the pre-charged locking energy storage device and only after successful locking is the unlocking energy storage device pre-charged by the motor drive unit, and in order to unlock the wing with the motor drive unit stationary, the energy stored in the pre-charged unlocking energy storage device first triggers the discharge of the pre-charged unlocking energy storage device and only after successful unlocking is the locking energy storage device pre-charged by the motor drive unit.