Furniture Shutter Fitting Anti-Twist Locking Mechanism
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Solution Overview
Problem
The assembly of furniture flaps in cabinets is complicated due to unstable pivoting actuating arms that can slide off, causing difficulties and potential injuries during installation, especially when high forces are applied to balance the flap's weight.
Innovation Solution
An anti-twist device with a locking part that engages a recess on a bearing bolt or deflection part, allowing the actuating arm to be fixed in its fully open position, preventing sliding and providing a secure assembly process, while also enabling three-dimensional adjustments to ensure proper alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the actuating arm is made pivotable to enable flap movement, then the flap can be opened and closed, but the actuating arm becomes unstable and can slide off during assembly
Solution Approach 1:
The anti-twist device is activated during the assembly process to temporarily fix the actuating arm in a predetermined position. This preliminary action prevents the arm from sliding off before the flap is properly installed, and is subsequently deactivated to restore normal pivoting functionality.
Solution Approach 2:
The system transitions from a static locked state during assembly to a dynamic pivoting state during operation. The anti-twist device enables this dynamic transition by being activatable during assembly and deactivatable during normal use, allowing the actuating arm to switch between stability and mobility as needed.
2Reliability
If the actuating arm is locked in position to prevent sliding, then assembly stability is improved, but the flap cannot be opened and closed
Solution Approach 1:
The anti-twist device provides a dynamic locking mechanism that can be activated during assembly to prevent sliding, then deactivated to restore flap movement. This dynamic behavior allows the system to switch between stable and movable states based on the operational phase.
Solution Approach 2:
The locking function is applied preliminarily during the assembly process only, not during normal operation. This temporary application of the locking mechanism provides stability when needed while preserving movement capability when the assembly is complete.
3Force
If spring devices apply high forces to balance the flap weight, then the flap can be held in position, but the actuating arm may shoot up and cause injuries
Solution Approach 1:
The anti-twist device applies a counteracting constraint to prevent the dangerous upward movement of the actuating arm. By temporarily fixing the arm in its fully open position during assembly, it counteracts the spring force that could otherwise cause the arm to shoot up and injure assembly personnel.
Solution Approach 2:
The locking mechanism provides a safety buffer before the dangerous situation can occur. By pre-establishing the locked position during assembly, it prevents the uncontrolled movement that would result from the spring force, cushioning against potential injuries.
4Ease of operation
If the actuating arm is made unstable to allow easy assembly, then assembly convenience is improved, but the arm slides off into the furniture body interior
Solution Approach 1:
The anti-twist device is activated as a preliminary measure during assembly to prevent the actuating arm from sliding off into the furniture body. This preliminary constraint allows assembly personnel to work safely and conveniently without the risk of the arm moving unpredictably.
Data Source
Figure 1a~1b
Figure 2a~2c
Figure 3a~3b
AI summary
Shutter (or door) fitting for fastening a furniture shutter (or door) (3) in a pivotable manner on a basic cabinet structure (2), having at least one actuating arm (5a, 5b), which is provided for moving the furniture shutter (3), and having at least one shutter-mounted fitting part (6), which can be connected to the actuating arm (5a, 5b), characterized in that the shutter-mounted fitting part (6) has a rotation-prevention means for temporarily fixing the pivoting position of the at least one actuating arm (5b), preferably in the fully open position thereof, wherein the rotation-prevention means, in a first operating position, arrests the at least one actuating arm (5b) in its pivoting position relative to the shutter-mounted fitting part (6) and, in a second operating position, allows the actuating arm (5b) to pivot.