Window Fitting with Rotary Lock for Easy Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing window and door fittings are complex and costly to manufacture, assemble, disassemble, and maintain, lacking simplicity and efficiency in their design.
Innovation Solution
A fitting with a corner drive, scissor-opening arm, and support arm device featuring a releasable rotary lock and eccentric pin, allowing for easy adjustment and secure locking, along with a modular structure for simplified assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional fittings are used to connect the support arm to the base part, then the connection is secure, but the assembly and disassembly process becomes complex and time-consuming
Solution Approach 1:
The connection mechanism is divided into separate functional elements: a rotary lock component with locking arms, a base part with locking surfaces, and a support arm with corresponding features. This segmentation allows each component to be manufactured independently and simplifies the assembly process, as the locking mechanism can be engaged and disengaged as a unit rather than requiring multiple fastening operations.
Solution Approach 2:
The connection mechanism transitions from a static, permanently fixed joint to a dynamic, releasable connection. The rotary lock enables the support arm to be rotated into locked and unlocked positions, allowing the connection state to change based on operational requirements. This dynamic capability simplifies assembly and disassembly while maintaining secure connection during use.
2Ease of repair
If the support arm is permanently fixed to the base part, then structural stability is high, but adjustment and maintenance become difficult
Solution Approach 1:
The connection between the support arm and base part is designed to be dynamically changeable rather than statically fixed. The rotary lock mechanism allows the connection to switch between locked (stable) and unlocked (adjustable) states, enabling easy maintenance and adjustment while preserving structural integrity during normal operation.
Solution Approach 2:
The angular position of the support arm relative to the base part can be changed by rotating the support arm to different positions before locking. This parameter change capability allows for adjustment of the fitting's geometry to compensate for wear or manufacturing tolerances, while the locked position maintains stable structural composition during use.
3Adaptability or versatility
If the eccentric pin is fixed in position, then manufacturing precision is maintained, but adaptability to wear and tolerances is reduced
Solution Approach 1:
The eccentric pin's position is made dynamically adjustable rather than fixed during manufacturing. By allowing rotation of the support arm to different angular positions before locking, the effective position of the eccentric pin relative to the scissor arm changes, enabling compensation for wear and manufacturing tolerances while maintaining precise control over the fitting's geometry.
Solution Approach 2:
The angular position parameter of the support arm can be varied to adjust the effective position of the eccentric pin. This parameter change allows the fitting to adapt to wear and manufacturing variations, as the optimal angular position can be selected during assembly or maintenance to restore precise closure and sealing.
4Reliability
If the locking mechanism allows free rotation, then adjustability is high, but unintentional loosening during operation increases
Solution Approach 1:
The rotary lock mechanism applies a preliminary locking action that prevents unintentional rotation during operation. The locking arms engage with complementary surfaces on the support arm and base part, creating a mechanical constraint that actively counteracts any forces that might cause the support arm to rotate or loosen during window or door operation.
Solution Approach 2:
The locking mechanism provides a dynamic state transition from unlocked (adjustable) to locked (secure) positions. During operation, the locked state maintains high reliability by preventing unintentional loosening, while the ability to transition to the unlocked state allows for adjustment when needed. The locking engagement is designed to be robust against operational forces while remaining releasable through deliberate user action.
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 easy assembly, disassembly, and adjustment of the fitting, ensuring precise window or door closure and seal, while preventing unintentional loosening, thus reducing manufacturing and maintenance costs.
Implementation Method 1
a spring tongue provided with a countercode contour to prevent rotation, the Spring tongue being rotatably attached to the support arm
Implementation Method 2
the support arm is pivotably mounted on the base part by means of a releasable rotary lock
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a fitting for a window, door or similar, comprising a corner bend, a driving rod that is connected to the corner bend and that forms an upper rail and a scissor-type deployment arm that is associated with a supporting arm unit. According to the invention, the supporting arm unit (17) has a base part (18) and a supporting arm (19) that is pivotally mounted on the base part (18) by means of a detachable rotary lock (20).