Shaver coupling and electrical shaver with coupling

Patent metadata

Field	Value
Publication number	US-10486316-B2
Application number	US-201715716456-A
Country	US
Kind code	B2
Filing date	Sep 26, 2017
Priority date	Sep 28, 2016
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

The invention refers to a coupling for transmitting a driving movement from an oscillating transmitter of an electric shaver to a cutter element.

First claim

What is claimed is:

1. A shaver coupling for transmitting a driving movement from an oscillating transmitter of an electric shaver, which transmitter extends at least in part along a vertical axis, to a cutter element, which extends and moves along a horizontal swiveling axis perpendicular to the vertical axis, the coupling comprising the transmitter, the cutter element and a coupling part, wherein the coupling part comprises a seat for receiving the transmitter, wherein the transmitter, the cutter element and the coupling part are arranged and formed such that the cutter element is constrained to the transmitter in a direction parallel to the horizontal swiveling axis while having a degree of freedom in at least two rotational directions and in at least one translational direction parallel to the vertical axis, wherein the transmitter comprises a pin extending along the vertical axis, and
wherein the seat of the coupling part is a slotted hole having a width in the direction of the horizontal swiveling axis which corresponds to the width of the transmitter pin in the direction of the horizontal swiveling axis and having a width in the direction of a horizontal tilting axis which exceeds the width of the transmitter pin in the direction of the horizontal tilting axis, wherein the tilting axis is perpendicular to the horizontal swiveling axis II and perpendicular to the vertical axis.

2. The shaver coupling according to claim 1 , wherein the transmitter 12 directly abuts the coupling part.

3. The shaver coupling according to claim 1 , wherein the coupling part comprises an at least in part spherical, cylindrical or ball-shaped outer surface and that the cutter element comprises a guidance chamber for receiving the outer surface such that the cutter element is constrained to the coupling part in a direction parallel to the horizontal swiveling axis while having a degree of freedom in at least two rotational directions and in at least one translational direction parallel to the vertical axis.

4. The shaver coupling according to claim 3 , wherein the guidance chamber comprises a corresponding contact surface for contacting the outer surface of the coupling part at least along one or more contact lines.

5. The shaver coupling according to claim 4 , wherein the guidance chamber comprises a corresponding contact surface for contacting the outer surface of the coupling part along at least one contact face.

6. The shaver coupling according to claim 5 , wherein the corresponding contact surface is at least in part spherical, cylindrical or ball-shaped.

7. The shaver coupling according to claim 1 , wherein the coupling part is rotatable relative to the transmitter around the vertical axis.

8. The shaver coupling according to claim 1 , wherein the coupling part is rotationally constrained to the cutter element in the rotational direction around the vertical axis.

9. The shaver coupling according to claim 1 , wherein the coupling part and the cutter element 6 comprise corresponding guide elements limiting the angle of relative rotation around the vertical axis I.

10. The shaver coupling according to claim 1 , wherein the coupling part comprises a bearing shell receiving the free end of the transmitter, wherein the bearing shell is mounted to the cutter element via a connecting rod which is pivotable about an axis perpendicular to the horizontal swiveling axis and perpendicular to the vertical axis.

11. The shaver coupling according to claim 1 , wherein the degree of freedom between the lower cutter element and the coupling part is more than about 3% of the size of the extension of the coupling part in the same translational direction.

12. An electric shaver comprising at least one cutter unit with a foil type upper cutter and a blade type lower cutter, a drive unit for generating an oscillating movement of at least one transmitter and a coupling according to claim 1 , which couples the transmitter to the blade type lower cutter.

13. The electric shaver according to claim 12 , wherein the at least one cutter unit is supported by a frame which is detachably mounted to the drive unit wherein when the coupling couples the transmitter to the blade type lower cutter, the frame with the cutter unit is movable relative to the drive unit in a direction parallel to the vertical axis and rotatable relative to the drive unit about the horizontal swiveling axis and about a horizontal tilting axis which is perpendicular to the horizontal swiveling axis and perpendicular to the vertical axis.

14. The electric shaver according to claim 13 , further comprising a housing, a head and a gimbal element, wherein the gimbal element is hinged in a pivotable manner to the housing and hinged in a pivotable manner to the head, wherein the cutter elements are arranged on or in the head.

15. A shaver coupling for transmitting a driving movement from an oscillating transmitter of an electric shaver, which transmitter extends at least in part along a vertical axis, to a cutter element, which extends and moves along a horizontal swiveling axis perpendicular to the vertical axis, the coupling comprising the transmitter, the cutter element and a coupling part, wherein the coupling part comprises a seat for receiving the transmitter, wherein the transmitter, the cutter element and the coupling part are arranged and formed such that the cutter element is constrained to the transmitter in a direction parallel to the horizontal swiveling axis while having a degree of freedom in at least two rotational directions and in at least one translational direction parallel to the vertical axis, wherein the cutter element comprises a series of arched blades fixed on a common base, which base forms the coupling part, wherein the coupling part comprises a slotted hole having two side surfaces situated opposed to each other in the direction of the horizontal swiveling axis II which are inclined and/or bent such that
a middle portion of the slotted hole has a width in the direction of the horizontal swiveling axis which corresponds to the width of the transmitter pin in the direction of the horizontal swiveling axis and
at least one of an upper portion and a lower portion of the slotted hole each have a width in the direction of the horizontal swiveling axis exceeding the width of the transmitter pin in the direction of the horizontal swiveling axis,

and wherein the slotted hole has a width in the direction of a horizontal tilting axis which exceeds the width of the transmitter pin in the direction of the horizontal tilting axis, wherein the horizontal tilting axis is perpendicular to the horizontal swiveling axis and perpendicular to the vertical axis.

16. An electric shaver comprising a head and a handle, at least one cutter unit with a foil type upper cutter and a blade type lower cutter, a drive unit for generating an oscillating movement of at least one transmitter and a coupling which couples the transmitter to the blade type lower cutter, wherein the head being movably supported relative to the handle around a horizontal swivel axis and/or around a horizontal tilt axis, said swivel axis is parallel to the lower cutter movement directions and said horizontal tilt axis III is perpendicular to said horizontal swivel axis II and wherein spring means 23 are provided for returning the head into a neutral, non-inclined position with respect to the swivel axis and/or the tilt axis characterized in that said lower cutter 6 is forced against said upper cutter 9 by spring means 23 which at least in part contributes to the spring means 23 for returning the head into

Assignees

• Braun Gmbh

Inventors

• Erndt Andreas
• Berger Philipp
• Perez Lopez Cirilo Javier
• Kappes Diana
• Gleich Detlef
• Jöst Michael

Classifications

• B26B19/048

  Complete cutting head being movable · CPC title

• B26B19/046 Primary

  Cutters being movable in the cutting head · CPC title

• B26B19/063

  Movable or adjustable cutting head · CPC title