Mechanism for transmitting movement of a device, in particular for cosmetic treatment, associated device and method

Abstract

This mechanism comprises a driving part ( 40 ) suitable for being moved reciprocally in a first direction and a second direction opposite the first direction and at least one part ( 42 ) driven by the driving part ( 40 ). The mechanism comprises at least one assembly ( 44 ) for establishing contact between a driving surface ( 62 ) of the driving part ( 40 ) and a driven surface ( 75 ) of the driven part ( 42 ), the contacting assembly ( 44 ) being suitable for driving the driven surface ( 75 ) during movement of the driving surface ( 62 ) in the first direction, and suitable for allowing the driving surface ( 62 ) to slide over the driven surface ( 75 ) during the movement of the driving surface ( 62 ) in the second direction.

1 . Mechanism for transmitting movement of a device, the mechanism comprising:
 a driving part suitable for being moved reciprocally in a first direction and in a second direction opposite to the first direction;   at least one driven part driven by the driving part;   wherein the mechanism comprises at least one assembly for establishing contact between a driving surface of the driving part and a driven surface of the driven part, the contacting assembly being suitable for driving the driven surface during movement of the driving surface in the first direction, and being suitable for enabling the driving surface to slide over the driven surface during the movement of the driving surface in the second direction.   
     
     
         2 . Mechanism according to  claim 1 , wherein the driving part is mounted movable in rotation around an axis of rotation in the first direction, and in the second direction during the reciprocal movement, the driven part being mounted movable in rotation or in translation in the first direction during the reciprocal movement of the driving part. 
     
     
         3 . Mechanism according to  claim 2 , wherein one of the driving part and of the driven part comprises a drive shaft, the other of the driving part and of the driven part comprising a sleeve receiving the drive shaft, an outer peripheral surface of the drive shaft forming one of the driven surface or of the driving surface, an inner peripheral surface of the sleeve forming the other of the driving surface or of the driven surface. 
     
     
         4 . Mechanism according to  claim 1 , wherein the driving part is mounted movable in translation along an axis in the first direction and in the second direction during the reciprocal movement, the driven part being mounted movable in translation or in rotation in the first direction during the reciprocal movement of the driving part. 
     
     
         5 . Mechanism according to  claim 1 , wherein the dynamic coefficient of friction between the driving surface and the driven surface in the first direction of movement of the driving part is greater than the dynamic coefficient of friction between the driving surface and the driven surface in the second direction of movement of the driving part. 
     
     
         6 . Mechanism according to  claim 1 , wherein the driving surface and/or the driven surface comprises a plurality of projecting members having a preferred orientation in either the first direction or the second direction. 
     
     
         7 . Mechanism according to  claim 6 , wherein the projecting members comprise fibrous elements projecting from the driving surface and/or from the driven surface. 
     
     
         8 . Mechanism according to  claim 1 , wherein the contacting assembly comprises a rough surface region on either the driving surface or the driven surface and an elastic surface region on the other of the driving surface and the driven surface. 
     
     
         9 . Mechanism according to  claim 1 , comprising an active assembly for moving the driving part according to an reciprocal movement. 
     
     
         10 . Mechanism according to  claim 1 , wherein the driven part is movable in rotation around an axis of rotation, in the first direction, the driven part having at least one air circulation member. 
     
     
         11 . Cosmetic treatment device comprising:
 a support;   a member capable of moving with respect to the support, ;   a transmission mechanism according to  claim 1 , connecting the support to the mobile member.   
     
     
         12 . Cosmetic treatment device-according to  claim 11 , wherein the mobile member is mounted movable in rotation. 
     
     
         13 . Cosmetic treatment device according to  claim 11 , wherein the mobile member has an abrasive external surface, the driven part having at least one air circulation member. 
     
     
         14 . Cosmetic treatment device according to  claim 11 , comprising a tip, on which the transmission mechanism and the mobile member are mounted, and an active assembly for moving the driving part according to a reciprocal movement, the active assembly being received in the support, the tip being removably mounted on the support. 
     
     
         15 . Method for transmitting movement in a cosmetic treatment device, comprising the following steps:
 provision of a mechanism according to  claim 1 ;   reciprocal movement of the driving part in the first direction, and in the second direction;   when the driving part moves in the first direction, driving of the driven part by the driving part by contact between the driving surface and the driven surface;   when the driving part moves in the second direction, sliding of the driving surface over the driven surface.   
     
     
         16 . Mechanism according to  claim 2 , wherein the driving part is mounted oscillating in rotation. 
     
     
         17 . Mechanism according to  claim 7 , wherein the fibrous element comprise bristles or loops. 
     
     
         18 . Cosmetic treatment device according to  claim 11 , wherein the member is intended to be applied on a body surface of a user. 
     
     
         19 . Cosmetic treatment device according to  claim 11 , wherein the mobile member is capable of moving jointly with the driving part. 
     
     
         20 . Cosmetic treatment device according to  claim 12 , wherein the mobile member is mounted so as to oscillate with respect to the support around an axis of rotation.