US 11,837,937 B2
Haptic actuator including field member within slotted opening of suspended coil and related methods
Kathryn K. Wopat, San Francisco, CA (US); Fu-Ying Huang, San Jose, CA (US); Hari Vasudevan, Bangalore (IN); Xin Alice Wu, Foster City, CA (US); and Shingo Yoneoka, Sunnyvale, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Aug. 10, 2020, as Appl. No. 16/989,559.
Claims priority of provisional application 62/893,961, filed on Aug. 30, 2019.
Prior Publication US 2021/0067022 A1, Mar. 4, 2021
Int. Cl. H02K 33/18 (2006.01); H05K 5/02 (2006.01); B06B 1/04 (2006.01)
CPC H02K 33/18 (2013.01) [B06B 1/045 (2013.01); H05K 5/0217 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A haptic actuator comprising:
a base;
a field member coupled to the base and comprising a plurality of spaced apart permanent magnets including a first permanent magnet and a second permanent magnet;
a coil having a loop shape defining a slotted opening therein; and
a spring member suspending the coil so that the field member is within the slotted opening and permitting relative movement of the field member and the coil; the first permanent magnet at least partially disposed within the slotted opening, and the second permanent magnet disposed at least partially between the first permanent magnet and the coil.