US 11,865,358 B2
Skin treatment device
Frank Beerwerth, Kaltenholzhausen (DE); Uwe Bielfeldt, Bad Soden (DE); Dalibor Dadic, Königstein (DE); Felix Heinemann, Frankfurt am Main (DE); Alois Koeppl, Weilrod (DE); and Anette Friedrich, Mühltal (DE)
Assigned to Braun GMBH, Kronberg (DE)
Filed by Braun GmbH, Kronberg (DE)
Filed on Jun. 29, 2021, as Appl. No. 17/361,598.
Claims priority of application No. 20183548 (EP), filed on Jul. 1, 2020.
Prior Publication US 2022/0001199 A1, Jan. 6, 2022
Int. Cl. A61N 5/06 (2006.01); A45D 26/00 (2006.01)
CPC A61N 5/0617 (2013.01) [A45D 26/0004 (2013.01); A45D 26/0028 (2013.01); A45D 2026/008 (2013.01); A45D 2200/1054 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A skin treatment device being a light-based hair removal device or a light-based skin treatment device, comprising:
a handle section being arranged to be held in a human user's hand;
a treatment head section having a skin treatment unit comprising a light source and a skin contact frame having a skin contact surface, the skin contact frame at least partially encircling a skin treatment area; and
a vibration generation unit being coupled with the skin contact frame to cause a vibration of at least a portion of the skin contact frame at an ultrasonic frequency essentially parallel to the skin contact surface to effectively reduce a stick-slip or static friction of the skin contact frame, wherein the vibration generation unit is configured such that a change to one of an amplitude or a frequency of the vibration results in an inversely proportional change to the other of the amplitude or the frequency of the vibration;
wherein the skin treatment device comprises a control unit that is configured to alter at least one of the amplitude or the frequency based on motion of the skin contact frame relative to a user's skin.