Drivetrain assembly for a personal care device

Patent metadata

Field	Value
Publication number	US-10813733-B2
Application number	US-201716332241-A
Country	US
Kind code	B2
Filing date	Sep 4, 2017
Priority date	Sep 12, 2016
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A drivetrain assembly ( 100 ) for a personal care device ( 10 ), the drivetrain assembly including a primary resonator ( 110 ); a secondary resonator ( 140 ) configured to reduce vibrations transmitted from the motor to a body ( 12 ) of the personal care device; a fixed point ( 130 ) positioned between the primary resonator and the secondary resonator; a first spring member ( 120 ) connected at a first end to the primary resonator and at a second end to the fixed point; a second spring member ( 150 ) connected at a first end to the secondary resonator and at a second end to the fixed point; a coupling spring ( 160 ) connected at a first end to the primary resonator and at a second end to the secondary resonator; and an actuator ( 170 ) configured to exert force on at least one of the primary resonator and the secondary resonator.

First claim

What is claimed is:

1. A drivetrain assembly for a personal care device, the drivetrain assembly comprising:
a primary resonator connected to a transmission component drivetrain shaft configured to transmit vibrations generated by the drive train assembly to a brush head member;
a secondary resonator configured to reduce vibrations transmitted from the drive train assembly to a body portion of the personal care device;
at least one fixed point positioned between the primary resonator and the secondary resonator;
a first spring member connected at a first end to the primary resonator and at a second end to one of the at least one fixed points;
a second spring member connected at a first end to the secondary resonator and at a second end to one of the at least one fixed points;
a coupling spring connected at a first end to the primary resonator and at a second end to the secondary resonator; and
an actuator configured to exert force on at least one of the primary resonator and the secondary resonator.

2. The drivetrain assembly of claim 1 , wherein the at least one fixed point is fixed to the body portion of the personal care device.

3. The drivetrain assembly of claim 1 , wherein the force exerted by the actuator is a rotational force exerted on at least one of the primary resonator and the secondary resonator.

4. The drivetrain assembly of claim 1 , wherein the force exerted by the actuator is a translational force exerted on at least one of the primary resonator and the secondary resonator.

5. The drivetrain assembly of claim 1 , wherein the actuator is configured to exert a first force on the primary resonator approximately 180° out of phase with a second force exerted on the secondary resonator.

6. The drivetrain assembly of claim 1 , wherein the first spring member, the second spring member, and the coupling spring are V-shaped springs.

7. The drivetrain assembly of claim 6 , wherein the coupling spring is at least partially positioned within either the V-shaped first spring member or the V-shaped second spring member.

8. A personal care device comprising:
a body portion;
a brush head member; and
a drivetrain assembly, the drivetrain assembly comprising a primary resonator, the primary resonator connected to a transmission component drivetrain shaft configured to transmit vibrations generated by the drive train assembly to the brush head member; a secondary resonator, the secondary resonator configured to reduce vibrations transmitted from the drive train assembly to the body portion; at least one fixed point positioned between the primary resonator and the secondary resonator; a first spring member connected at a first end to the primary resonator and at a second end to one of the at least one fixed points; a second spring member connected at a first end to the secondary resonator and at a second end to one of the at least one fixed points; a coupling spring connected at a first end to the primary resonator and at a second end to the secondary resonator; and an actuator configured to exert force on at least one of the primary resonator and the secondary resonator.

9. The personal care device of claim 8 , wherein the actuator is configured to exert a first force on the primary resonator approximately 180° out of phase with a second force exerted on the secondary resonator.

10. The personal care device of claim 8 , wherein the first spring member, the second spring member, and the coupling spring are V-shaped springs.

11. The personal care device of claim 10 , wherein the coupling spring is at least partially positioned within either the V-shaped first spring member or the V-shaped second spring member.

Assignees

• Koninklijke Philips Nv

Inventors

• Boere Stijn Willem
• Soemers Hermanus Mathias Joannes Rene
• Bruggers Jan Willem
• Mehendale Aditya

Classifications

• A61C17/0202

  Hand-pieces · CPC title

• A61C15/047

  power-driven · CPC title

• F16F15/22

  Compensation of inertia forces {(suppression of vibrations of rotating systems by favourable grouping or relative arrangements of the moving members of the system or systems F16F15/20, counterweights F16F15/28; correcting-weights for balancing rotating bodies F16F15/32)} · CPC title

• A61C17/3472 Primary

  with combined movements of the brush body · CPC title

• F16F1/025

  characterised by having a particular shape (F16F1/04, F16F1/14, F16F1/18, F16F1/32, F16F1/34 take precedence) · CPC title