Compact Door Fitting With Segmented Locking Handles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lockable door sets require more installation space and have security deficiencies, such as easy unintentional unlocking, due to their design and functionality.
Innovation Solution
A compact door fitting with a first handle and a shaft element connected rotationally to a lock unit, featuring a locking device that prevents rotation and a switching element that adjusts the locking mechanism's accessibility, ensuring secure and space-efficient installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lockable door fittings with integrated locking functionality are used, then the door can be locked securely, but the handles and rosettes require significantly more installation space
Solution Approach 1:
The door fitting is divided into separate functional components: a first handle for locking, a second handle for opening, and a shaft element that transmits rotation. This segmentation allows each component to be optimized independently, reducing the overall installation space while maintaining locking functionality.
Solution Approach 2:
The shaft element serves multiple functions: it transmits rotation from the first handle to the lock unit, connects the second handle to the lock unit, and provides a structural axis for both handles. This multi-functionality reduces the number of separate components needed, thereby reducing installation space.
2Reliability
If lockable door fittings with integrated locking functionality are used, then the door can be locked securely, but the handles appear visually and haptically unappealing
Solution Approach 1:
By separating the locking function (first handle) from the opening function (second handle), each handle can be designed with optimized aesthetics for its specific purpose, rather than forcing a single handle to perform both functions with compromised design.
Solution Approach 2:
Instead of making a single handle perform both locking and opening functions (which compromises its design), the invention inverts the approach by using two specialized handles: one optimized for locking and another optimized for opening, allowing each to have superior visual and haptic properties.
3Ease of operation
If the lock is easily released unintentionally, then the door fitting is simple to operate, but security deficiencies occur
Solution Approach 1:
The door fitting incorporates a dynamic locking mechanism where the shaft element can be in different rotational states (locked or unlocked). The locking device dynamically engages or disengages based on the rotational position, providing both ease of operation through clear state transitions and security through the locked state.
Solution Approach 2:
The door fitting provides tactile feedback through the handles that indicate the locked or unlocked state. This feedback mechanism ensures that users can clearly determine the door's state without complex operations, while the feedback itself reinforces the security of the locked position by making it distinct and recognizable.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present disclosure relates to a door hardware assembly (1) for a door leaf. The door hardware assembly (1) comprises a first handle (10) and a shaft element (20) for forming an operative connection with a lock unit (120) incorporated into the door leaf (110). The shaft element (20) is rotationally fixed to the first handle (10). The door hardware assembly (1) further comprises a locking device (30) configured to prevent rotation of the shaft element (20) and a switching element (40) rotatable relative to the first handle (10) between a first rotation position and a second rotation position, and actuating the locking device (30). In the first rotational position of the switching element (40), rotation of the shaft element (20) is allowed by the locking device (30), and in the second rotational position of the switching element (40), rotation of the shaft element (20) is prevented by the locking device (30).Furthermore, the door assembly (1) includes an actuating slide (50) which is connected to the first handle (10) and is slidable relative to the first handle (10). The actuating slide (50) and the switching element (40) engage with each other in such a way that a displacement of the actuating slide (50) causes the switching element (40) to rotate from the first rotational position to the second rotational position and back. A door (100) is also shown.