Stacked Housing Latching Arm for Narrow High-Retention Assemblies
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Solution Overview
Problem
Existing housing arrangements with narrow stacking directions face challenges in creating robust and manageable latching connections that can securely connect stacked housings without requiring excessive construction space.
Innovation Solution
The housing arrangement features disc-like housings with two stacking walls and narrow sides, utilizing a latching arm that extends parallel to the narrow side and has a lug that engages over an adjacent housing, providing a secure latching mechanism without needing extensive space in the stacking direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional snap-fit connections are used in narrow housings, then the housing width can be reduced, but the latching connection becomes insufficiently robust and difficult to manage
Solution Approach 1:
The latching arm extends not only in the stacking direction but also parallel to the narrow side of the housing, creating a two-dimensional path that increases the effective latching length without increasing housing width. This dimensional extension allows the latching arm to engage the adjacent housing at a point offset from the direct stacking axis, providing greater mechanical leverage and robustness.
Solution Approach 2:
The latching connection is segmented into distinct functional regions: a connecting region integrated into the housing, an arm region extending parallel to the narrow side, and a lug region extending in the stacking direction. This segmentation allows each region to be optimized independently for its specific function while working together to achieve reliable latching in compact dimensions.
2Force
If the latching arm is extended to increase retaining force, then the latching connection becomes more robust, but the construction space required in the stacking direction increases
Solution Approach 1:
Instead of extending the latching arm solely in the stacking direction, the design extends it parallel to the narrow side as well. This creates a diagonal engagement path that increases the effective latching length and mechanical advantage without proportionally increasing the stacking direction footprint, thereby maintaining compact housing dimensions while achieving high retaining forces.
Solution Approach 2:
The latching arm is designed as a resilient, deflectable element that can be deformed during the latching process and then springs back to engage the adjacent housing. This dynamic behavior allows the arm to absorb and distribute forces, achieving high retaining force with a more compact structure compared to rigid extensions.
3Reliability
If the latching arm is made longer to engage the rear of the latching hook, then the latching connection becomes more secure, but the device complexity increases
Solution Approach 1:
The latching arm design with its multi-region structure (connecting region, arm region, lug region) serves multiple functions simultaneously: structural integration with the housing, force transmission, and engagement with the adjacent housing. This multi-functionality is achieved through a single integrated component rather than multiple separate parts, maintaining simplicity while achieving secure engagement.
Data Source
AI summary
A housing arrangement includes at least two or more interconnected housings which are stacked together in a stacking direction, and which respectively have at least one receiving space in which one or more electrical and/or electronic components are arranged. The respective housings are each formed in a disc-like manner, have two stacking walls and a number of narrow sides. Adjacent housings of the housing arrangement are connected to one another with at least one or more latching connections, wherein the respective latching connection of at least the middle housing has at least one latching arm. Starting from a connecting region in which it is connected to the respective housing, the latching arm first extends at one of the narrow sides in an arm region parallel to this narrow side. The latching arm has a lug which extends in the stacking direction, and which engages at least partly over an adjacent housing in the stacking direction. The latching arm further has a first latching mechanism for latching on a corresponding second latching mechanism of an adjacently stacked housing.