Door Opener Feedback Contact Spacer Pivot Bearing
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Solution Overview
Problem
Existing door openers with feedback contacts have undefined switching points and a risk of the feedback flap falling out of the groove without additional transport security, leading to instability and potential loss.
Innovation Solution
A door opener design featuring a housing with a receptacle for a spacer or contact lug, where the receptacle has a slot wider than the spacer's thickness, ensuring the spacer is captively mounted and reducing the risk of accidental removal, with a pivot bearing forming a defined pivot axis for precise operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a feedback contact with a switching lug is used in conventional door openers, then the door opener can provide feedback functionality, but the switching point is relatively undefined and the feedback flap can fall out of the groove without additional transport security
Solution Approach 1:
The switching lug is designed with a round cross-section instead of a flat or angular shape. This spherical/curved geometry allows the switching lug to rotate smoothly within the receptacle while being retained by the slot geometry, providing both a defined switching point and preventing accidental removal without additional fastening elements
Solution Approach 2:
The switching lug with round cross-section is nested within the receptacle slot, where the slot width is dimensioned to be slightly larger than the diameter of the switching lug. This nested configuration allows the switching lug to rotate freely for switching operation while the slot geometry provides retention, eliminating the need for separate securing mechanisms
2Ease of manufacture
If the slot width is made larger to facilitate easy assembly, then the feedback contact can be easily inserted, but the risk of the feedback flap falling out increases
Solution Approach 1:
The round cross-section of the switching lug combined with the slot geometry creates a retention mechanism where the curved shape of the switching lug fits within the slot width. The circular profile allows easy insertion while the geometry prevents the switching lug from being completely removed, as it would need to be inserted at an angle or with significant force
Solution Approach 2:
The switching lug design is self-retaining through its round cross-section and slot configuration. The component secures itself within the receptacle through its geometric relationship with the slot, without requiring external fastening elements or additional securing measures
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 door opener with a precisely defined switching point and enhanced security, preventing the spacer from falling out and ensuring stable operation, even when the housing is open, without the need for additional fastening.
Implementation Method 1
The recording surrounds the round cross-section at least partially and forms a pivot bearing for the spacer. The pivot bearing forms a defined pivot axis about which the spacer can rotate.
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The invention relates to a door opener (1) for locking or releasing a closed sash of a door or window, wherein a door opener latch (14) is provided which interacts with a blocking device that releases or locks the movement of the door opener latch to hold the sash in its closed position. The door opener latch (14) interacts with a lock latch, the lock latch actuating a feedback contact arranged in the door opener when the sash is in its closed position. In order to provide the feedback contact with a highly defined switching point, and in particular to ensure that it is captive within the door opener, the feedback contact is provided with a spacer (38) which has at least a partially round cross-section and is captive in a receptacle (2) of the door opener housing (11).The receptacle (2) of the door opener housing (11) encompasses at least partially the round cross-section of the spacer (38) to form a pivot bearing for the spacer.