Pivotable Latching Element for Corrugated Air Duct Securing
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Solution Overview
Problem
Existing air duct securing elements for ventilation systems are prone to slipping off during insertion and have high production costs due to complex designs and additional features required for stability, which complicates the assembly and secure fixation of tubular and corrugated air ducts to ventilation housing connecting pieces.
Innovation Solution
An air duct securing element with a base body of annular shape that encompasses the connecting piece, featuring a pivotable latching element and a fixing element that engages with the connecting piece's through-opening, ensuring secure attachment and preventing rotation, while allowing for easy insertion and removal of the air duct.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional levers or slides are used to secure air ducts, then the air ducts can be fixed during construction, but they can be lost during casting and are difficult to access when rebars are already laid
Solution Approach 1:
The securing element is divided into two distinct functional parts: a clamp body that secures the air duct and a separate fastening mechanism that engages with the connecting piece. This segmentation allows the clamp to remain accessible while the fastening occurs through pre-drilled holes, solving both the security and accessibility problems.
Solution Approach 2:
The patent introduces threaded rods as an intermediary element that connects the clamp body to the connecting piece. These rods pass through pre-drilled holes in the rebars, serving as a mediator that allows secure fastening without requiring direct access to the backside of the connecting piece, thus maintaining accessibility while ensuring reliability.
2Reliability
If securing elements like levers or slides are used, then air ducts can be fixed, but they can be lost during casting and are difficult to access
Solution Approach 1:
The securing system is segmented into a simple clamp body and separate fastening rods, allowing each component to be manufactured independently using standard machining processes. This reduces manufacturing complexity compared to integrated securing elements with complex moving parts.
Solution Approach 2:
The clamp body design is universal and can be used with different connecting pieces and air duct configurations. The standardized clamp structure with adjustable fastening rods provides a multi-functional solution that works across various construction scenarios, reducing the need for multiple specialized components.
3Reliability
If guide webs are added to prevent slipping, then the air duct securing element remains stable during insertion, but production costs increase and design effort increases
Solution Approach 1:
The holes for the threaded rods are pre-drilled into the connecting piece during its manufacturing process. This preliminary action ensures proper positioning and stability during air duct insertion without requiring additional guide webs or complex features to be added later, thus maintaining simplicity while ensuring reliability.
Solution Approach 2:
The stabilization function is extracted from the connecting piece design itself and moved to the fastening system. Instead of adding guide webs to the connecting piece, the patent uses separate threaded rods that engage with pre-drilled holes, removing the need for complex integrated features while maintaining insertion stability.
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
The solution provides a cost-effective, simple, and secure method for attaching tubular and corrugated air ducts to ventilation housing connecting pieces, preventing slipping and allowing for easy detachment, thus enhancing the stability and assembly efficiency of ventilation systems.
Implementation Method 1
The at least one latching element is pivotably mounted on the base body via a pivot axis
Implementation Method 2
at least one fixing element which extends inwards from the base body and which, in the installed state, can be arranged lying at least in a through-opening formed in the connecting piece and supported on a fixing section of an edge of the through-opening
Implementation Method 3
at least one latching element which, in a latched position, in which the at least one latching element can engage in a corrugation trough of the air duct
Data Source
Figure 1~2
Figure 3~6
Figure 7~10
AI summary
The invention relates to an air duct securing element (4) for the detachable fastening of a tubular and corrugated air duct to a connection nozzle (2) of a ventilation housing (3) and comprises a base body (7) on which at least one fixing element (8), extending inwards from the base body (7), and at least one locking element (14) are integrally formed. The locking element (14) extends inwards from the base body (7) in a locking position, in which it can engage in a corrugation trough of the air duct, and in the assembled state can extend through the through-opening (6) into the connection nozzle (2). The at least one locking element (14) is pivotably mounted on the base body (7) via a pivot axis (15) from the locking position into an axial direction (16) with respect to the base body (7).