US 12,437,910 B2
Active haptic feedback device, human machine interface and automotive part
Thomas Agung Nugraha, Stuttgart (DE); and David-Kenneth Jaeger, Stuttgart (DE)
Assigned to Motherson Innovations Company Limited, London (GB)
Filed by Motherson Innovations Company Ltd., London (GB)
Filed on Oct. 3, 2024, as Appl. No. 18/905,463.
Claims priority of application No. 10 2023 134 035.2 (DE), filed on Dec. 5, 2023.
Prior Publication US 2025/0182945 A1, Jun. 5, 2025
Int. Cl. H01F 7/08 (2006.01)
CPC H01F 7/081 (2013.01) 11 Claims
OG exemplary drawing
 
1. An active haptic feedback device for a human machine interface, comprising:
a fixed part comprising a coil winding on a bobbin and through which a coil core extends, which is fixed to a base plate;
a moveable part comprising a ferromagnetic plate arranged between the coil core and the base plate, wherein the ferromagnetic plate has a resting state, when no current is applied to the coil winding, with a gap between the ferromagnetic plate and the coil core, and an activation state, when current is applied to the coil winding, with the gap being reduced due to a movement of the coil core away from the base plate and towards the ferromagnetic plate; and
a vibrating plate arranged on a side of the coil core opposite to a side of the ferromagnetic plate such that the coil core extends at least partly between the vibrating plate and the ferromagnetic plate, wherein the vibrating plate is fixedly attached to the ferromagnetic plate and moveably attached to the base plate via springs, wherein the springs are configured to bring back the ferromagnetic plate to its resting position when no current is applied to the coil winding, from its activation position.