Electric shaver with four joint linkage

An electric shaver comprising:

• a. a handle,
• b. a shaver head including at least one cutter unit which includes a drivable cutter element and a shear foil,
• c. and a motor connected to said cutter element via a drive transmitter, wherein said drive transmitter comprises a drive shaft extending from said handle into said shaver head, said drive shaft comprising a longitudinal axis, is rotatable in an oscillating manner by said motor and is rotatable about the longitudinal axis, but otherwise is fixedly supported by said handle,
• d. wherein said shaver head is connected to said handle by a support structure providing for swivel and tilting axes about which said shaver head may swivel or tilt relative to said handle, said swivel and tilting axes extending adjacent to each other and adjacent to said cutter element in directions transverse to each other,
• e. wherein said support structure includes a pair of link arms forming a four-joint linkage with each link arm having a head joint connected to a shaver head part and a handle joint connected to the handle or a base part, an instantaneous center of rotation along which the tilting axis moves is defined by the intersection of a straight line extending through the head and handle joints of one link arm with a straight line extending through the head and handle joints of another link arm,
• f. wherein said link arms are mounted in a standing configuration with the head joints of the link arms further away from the handle than the handle joints of the link arms,
• g. characterized in that said link arms are configured to define for a virtual center point of the shaver head a trajectory having a double pitch roof configuration comprising two branches diverging from each other towards the handle,
• h. wherein said virtual center point is defined by a point on the shaver head part and positioned in the region of the cutter element in the center thereof.