Built-in Window Lock with Axial Clamping and Detachable Handle
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Solution Overview
Problem
Conventional built-in window locks with protruding bases and visible screws compromise aesthetic appeal, increase window size, and pose risks during transport due to the necessity of always mounting the handle, while baseless handles require multiple types for different window profiles and can lead to sizing errors.
Innovation Solution
A built-in lock with a separate base and a clamping plate that can be drawn axially to secure the operating mechanism, featuring a clip mechanism to lock the spindle, allowing the same handle to be used across various window profiles by ensuring the spindle snaps into a fixed position relative to the window's front wall, and accommodating different profile distances with a pressure piece and spring mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base protrudes outside the handle to provide access to screw holes, then the handle can be securely fastened, but the aesthetic appearance is compromised and the base becomes more conspicuous
Solution Approach 1:
The base is nested within the handle structure, with the base recessed into the handle body rather than protruding. The screw holes are positioned such that screws can be inserted from the rear of the handle, allowing the base to be concealed while maintaining secure fastening functionality.
2Reliability
If the handle is always mounted on the window, then the lock functions properly, but the window takes up extra space and fewer windows can be transported per load
Solution Approach 1:
The handle assembly is segmented into separable components: the handle body with base can be mounted on the window, while the handle lever can be detached and removed. This allows the window to be transported in a compact state without the handle protruding, yet still maintain the capability to function when the handle is attached.
Solution Approach 2:
The handle transition from a permanently fixed state to a dynamically removable state. The handle lever can be detached when not in use during transport, and reattached when the window is installed and needs to function, providing flexibility in both transport and operational phases.
3Reliability
If the handle is always mounted on the window, then the lock functions properly, but the handle forms a potential risk of damage to itself and to other windows during transport or handling
Solution Approach 1:
The handle is divided into a stationary base mounted on the window and a movable lever that can be detached. During transport, the lever can be removed, leaving only the compact base attached to the window, thereby eliminating the protruding portion that could cause damage to the handle itself or other windows during handling.
4Adaptability or versatility
If baseless handles are used with a fixed position of the spring-loaded pin, then the handle can be used for multiple window profiles, but different clamping plates are needed to fill the space between the lock and the front wall
Solution Approach 1:
The base is designed with a universal structure that can accommodate different window profile types. The spring-loaded pin mechanism is positioned such that it can engage with various profile configurations, and the base includes adjustable or interchangeable clamping elements that can adapt to different distances between the lock mechanism and the front wall, eliminating the need for multiple specialized clamping plates.
Data Source
Figure 1
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Figure 4~5
AI summary
Built-in lock that comprises a handle (8) with a lever (9) and a spindle (11); an operating mechanism (17) for converting the rotation of the handle (8) into a translation of a locking slat (5) and a base (21), whereby the operating mechanism (17) is held fast by a clamping plate (19) that is movable in the axial direction (Y-Y') of the spindle (11), whereby the clamping plate (19) is provided with a bearing (28) for the rotation of the handle (8), whereby this bearing (28) is held fast in the clamping plate (19) in the axial direction (Y-Y') and whereby this bearing (28) is provided with a clip mechanism (29) to lock the spindle (11) in the axial direction (Y-Y') with respect to the bearing (28) in the mounted situation.