Shaver coupling and electrical shaver with coupling
AssigneeBraun GmbH
InventorsAndreas Erndt, Philipp Berger, Cirilo Javier Perez Lopez, Diana Kappes, Detlef Gleich, Michael Jöst
Life of this patent
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Abstract
The invention refers to a coupling for transmitting a driving movement from an oscillating transmitter of an electric shaver to a cutter element.
Claims16
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.
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.
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 a neutral position with respect to at least a head swivel and/or tilt movability, 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.
Dependencies are inferred from the claim text.