Rotating Disk Window Lock with Key-Operated Track
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Solution Overview
Problem
Existing window locks do not provide adequate safety and operability requirements, particularly for windows above a certain height, where they need to be accessible only with a removable key, and lack a mechanism that provides natural feedback upon securing.
Innovation Solution
A window lock system comprising a first and second mount attached to window components, a flexible cord, a rotating lock disk with a key receptor and track, and a lock insert that is secured in place by rotating the disk from a first to a second state, preventing removal of the insert when locked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional window lock mechanism is used, then the window can be locked, but it does not provide adequate safety for windows above a certain height and lacks natural feedback upon securing
Solution Approach 1:
The lock mechanism is divided into separate functional components: a key receptacle for secure access control, a rotating disk for locking/unlocking actions, and a cord assembly for maintaining window position. This segmentation allows each component to perform its specific function effectively, providing both safety through key control and ease of operation through simple rotational and pulling motions.
Solution Approach 2:
The rotating disk mechanism provides natural feedback to the user through tactile and visual cues during the locking and unlocking process. As the disk rotates, the user can feel the mechanical engagement and see the position change, confirming that the lock is properly secured or released without requiring additional indicators or complex interfaces.
2Reliability
If a key mechanism is added to prevent unauthorized opening, then safety is improved, but the device complexity increases
Solution Approach 1:
The rotating disk serves multiple functions: it acts as the locking mechanism, provides the interface for key insertion and rotation, offers tactile feedback to the user, and controls the engagement of the lock insert with the mount. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while maintaining improved safety through key control.
3Reliability
If a rotating lock disk with track is used to prevent insert removal, then security is improved, but the ease of operation decreases
Solution Approach 1:
Instead of designing a mechanism where the insert actively engages with the mount, the design inverts the approach: the rotating disk with its track passively controls insert retention. When the disk rotates to the locked position, the track geometry automatically prevents insert removal without requiring active engagement forces or complex locking features. This inversion simplifies the operation while maintaining security.
Data Source
AI summary
A window lock system selectively prevents a window from being opened. A window sash can be connected by a cord to the sill of the window. The cord has an attached lock insert. To lock the window, the insert on the cord is inserted into a track housed in a mount that is mounted to the sash or sill. The track may be formed as part of a rotatable disk. A key turns the track to move the track to a locked configuration. In the locked configuration, the sash and sill are connected by the cord. To unlock the window, the key rotates the disk to allow release of the insert from the track.