Door Seal Fastening Device with Adjustable Depth
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Solution Overview
Problem
Existing door seal fastening devices require additional machining steps, such as milling, which are costly and aesthetically unappealing, and limit the depth of door sealing strip installation, making them inefficient for adjustments due to changes in floor structure or sealing requirements.
Innovation Solution
A fastening device with a bent sheet metal design featuring a horizontal fastening leg and vertically spaced U-profile engagements, allowing for adjustable installation depths without visible machining, enabling flush mounting and easy adaptation to different door sealing strip heights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vertical stop legs are used to fasten the door sealing strip, then the fastening function is achieved, but the stop legs either protrude beyond the door contour or require countersinking millings that are costly and aesthetically unappealing
Solution Approach 1:
The fastening device transitions the fastening location from the vertical dimension (protruding stop legs) to the horizontal dimension (fastening leg extending parallel to groove base within the groove), eliminating the need for vertical protrusions or countersunk millings while maintaining secure fastening
Solution Approach 2:
The fastening device is nested within the door groove structure, with the fastening leg positioned horizontally inside the groove and the retaining leg engaging the housing profile from within, avoiding any external protrusions or surface millings
2Reliability
If vertical stop legs are used for fastening, then the fastening function is achieved, but the installation depth is limited and cannot accommodate changes in floor structure or sealing requirements
Solution Approach 1:
The fastening device incorporates multiple adjustable engagement positions through the retaining leg's ability to engage at different locations on the housing profile, allowing dynamic adjustment of installation depth to accommodate floor structure changes or different sealing requirements
Solution Approach 2:
The retaining leg is designed with multiple U-profile engagements spaced vertically, creating discrete engagement positions that allow the housing profile to be secured at different depths within the door groove, providing versatility for various installation scenarios
3Reliability
If the door sealing strip is installed deeper in the door groove, then better sealing is achieved, but the vertical stop legs would interfere with the deeper installation
Solution Approach 1:
The fastening function is moved to the horizontal plane within the groove, allowing the housing profile to extend vertically to any depth limited only by the groove depth itself, enabling deep installation for optimal sealing without interference from fastening components
Data Source
Figure 1~3
AI summary
A fastening device is provided for a housing profile (2) of a door sealing strip (3) in a door groove (4), comprising a fastening leg (5) with a through-hole (6) for a fastening means (7) for fastening the housing profile (2) in the door groove (4) and a retaining leg (8) with a U-shaped engagement (9) for an end face or an inner edge of a recess of the housing profile (2) facing the groove base (10) of the door groove (4), which is simple and economical to manufacture and which does not require its own milling in a door and which is visually unobtrusive, which is achieved by the fact that the door groove (4) is designed to be deeper by a distance 'A' than the door sealing strip (3) is high, and the retaining leg (8) has at least one second,from the first engagement (9) has U-profile-shaped engagements (12) spaced one above the other and apart from each other by the same or smaller distance 'a', and the housing profile (2) can be inserted into the engagements (9;12) at different distances from the groove base (10) of the door groove (4).