Rotary electric shaver
AssigneeMaxell Izumi Co., Ltd.
InventorsToshihiko Ohara, Tomio Kozu
Life of this patent
Estimating the term…
Abstract
A rotary electric shaver has a new structure which compatibly achieves both a function of the rotary electric shaver allowing a user to have less tingling feel on the skin and a function of a reciprocating electric shaver enabling easy deep shaving of hair, by replacing a first head. A rotary electric shaver includes a main body having a drive shaft and a connection part, a first head having a built-in first transmission drive system connected to the drive shaft to rotate a first inner blade, and detachably connected to the connection part, and a second head detachably connected to the connection part from which the first head is removed. The second head has a built-in second transmission drive system connected to the drive shaft to cause the second inner blade to reciprocate.
Claims6
A rotary electric shaver with a kit, comprising:
- a main body having a drive shaft and a connection part;
- a first head having a plurality of first blade units each having a first outer blade, a first inner blade rotating while coming into sliding contact with an inner surface of the first outer blade, and a first driven shaft that rotates the first inner blade, wherein the first head has a built-in first transmission drive system connected to the drive shaft to rotate the first driven shaft, and detachably connected to the connection part;
- and
- a second head detachably connected to the connection part from which the first head is removed,
- wherein the second head has a plurality of second blade units each having a second outer blade and a second inner blade reciprocating while coming into sliding contact with an inner surface of the second outer blade, and wherein the second head has a built-in second transmission drive system connected to the drive shaft to cause the second inner blade to reciprocate, and
- wherein the second transmission drive system has an eccentric shaft and a plurality of oscillators that convert a rotational motion of the eccentric shaft into a reciprocating motion, and rotates the eccentric shaft at a rotation speed higher than a rotation speed of the first driven shaft,
- wherein the second transmission drive system has a first gear rotated by driving power of the drive shaft and a second gear rotated by meshing with the first gear, and the eccentric shaft is assembled to the second gear, and
- wherein the rotation speed of the second gear is set to be at least twice the rotation speed of the first gear.
Dependencies are inferred from the claim text.