Fan Device Rear Locking Mechanism for Wall Integrity
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Solution Overview
Problem
Conventional fan devices for switching cabinets deform the cabinet wall during fastening due to excessive pressure, resulting in gaps that require additional sealing.
Innovation Solution
A fan device with a movable locking element that can be manually displaced from a mounting position to a fixing position, allowing for secure fastening without applying pressure from the front, thereby avoiding wall deformation. The locking element can be realized as a rotating bar, tongue with tensioning hook, or a clamped-on mechanism with spring elements to accommodate various wall thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fan device is pressed at considerable pressure into the recess during fastening, then the locking element can latch behind the wall, but the cabinet wall becomes severely bent and deformed
Solution Approach 1:
Instead of pressing the fan device from the front into the wall, the locking element is actuated from the rear side to engage with the wall portion. The locking element can be displaced in the direction of the rear side of the wall portion and pressed from behind onto the rear-side wall, achieving secure fastening without deforming the front surface of the wall.
Solution Approach 2:
The fastening function is separated into two independent actions: insertion of the fan device into the recess (without pressure) and subsequent actuation of the locking element from the rear side. This segmentation allows the locking mechanism to operate independently without transmitting deformation forces to the wall surface.
2Reliability
If the fan device is inserted into a recess with considerable pressure, then secure fastening is achieved, but gaps form between the wall and fan device requiring additional sealing
Solution Approach 1:
The fan device is first inserted into the recess in a pressure-less manner to establish proper positioning and alignment. Only after correct positioning is achieved is the locking element actuated from the rear side to secure the fastening. This preliminary action without pressure prevents misalignment and gap formation.
Solution Approach 2:
The locking action is applied from the rear side rather than the front, allowing the fan device to be secured without transmitting forces that would create gaps at the front interface between the wall and fan device housing.
3Shape
If manual actuation of the locking element is required to achieve secure fastening, then wall deformation is avoided, but the fastening process becomes more complex
Solution Approach 1:
The locking element is mounted so as to be movable on the fan device and can be displaceable manually from a mounting position into a fixing position. The mechanism serves itself by using the existing movable locking element structure to achieve secure fastening without requiring additional actuation mechanisms or complex external devices.
Data Source
AI summary
The invention relates to a fan device with at least one locking element for securing the fan device to a wall portion, in particular to an electrical enclosure wall, with a front and a rear face. The fan device is inserted into a front-face wall portion opening in a pressureless manner, and the locking element is movable in the direction of the rear face of the wall portion in the inserted state.