Controllable Door Lock Hub With Rotating Blocking Discs
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Solution Overview
Problem
Existing switchable followers for door locks require the complete removal of a securing element to change the function, making it difficult to switch the nut mechanism on and off easily.
Innovation Solution
The introduction of locking discs that can be rotated between two positions to selectively engage or disengage the switching levers, allowing for mechanical control without the need to remove any security elements, and the use of spring elements to bias the switching levers into the release position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a securing element is used to enable rotation transmission from driver elements to the central part of the nut, then the transmission can be effected regardless of the switching lever position, but the securing element must be completely removed from the switchable follower to change the function, making it difficult to switch the nut mechanism on and off easily
Solution Approach 1:
The invention divides the switching mechanism into two independent parts: the switching lever that controls engagement and the locking disc that selects the operational mode. This segmentation allows the securing element to remain permanently installed while enabling functional switching through the locking disc's rotational positions, eliminating the need to remove the securing element for mode changes.
Solution Approach 2:
The locking disc acts as an intermediary element between the securing element and the switching lever. It translates rotational input into selective engagement of the switching lever with the driver element, thereby mediating the transmission control without requiring removal of the securing element.
2Ease of operation
If the switching levers are permanently held in the engaged position by the locking disks, then the mechanical connection is established exclusively via the engagement lever, but the switching levers can still be switched by electromechanical switching means if the switching levers are not permanently held in the engaged position
Solution Approach 1:
The system provides dynamic switching capability through the locking disc that can be rotated to different positions. This allows the engagement lever to be selectively engaged or disengaged from the driver element, enabling both permanent mechanical holding when needed and flexible electromechanical switching when required, thus combining ease of mechanical control with switching flexibility.
Data Source
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AI summary
The invention relates to a controllable hub (1) for a door lock, comprising a hub central part (10) on which follower elements (11) are rotatably arranged about a hub axis (12), and connecting levers (13) that are associated with the follower elements (11) are arranged in an articulated manner on the hub central part (10). The connecting levers (13) can be brought into an engaging position in order to engage into the follower elements (11), a rotational transmission from the follower elements (11) into the hub central part (10) via the connecting levers (13) being allowed in said engaging position. The connecting levers (13) can be brought into a release position in which a rotational transmission from the follower elements (11) onto the hub central part (10) is disconnected. According to the invention, blocking disks (14) that are associated with the connecting levers (13) are provided. The blocking disks are received on the hub (1) in a rotatable manner about the hub axis (12) and can be rotated into a first position in which the blocking disk (14) brings the associated connecting lever (13) into the engaging position, and the blocking disks can be rotated into a second position in which the blocking disk (14) brings the associated connecting lever (13) into the release position.