Shaver

Patent metadata

Field	Value
Publication number	US-11577416-B2
Application number	US-201616462507-A
Country	US
Kind code	B2
Filing date	Nov 21, 2016
Priority date	Nov 21, 2016
Publication date	Feb 14, 2023
Grant date	Feb 14, 2023

Abstract

A razor is provided, including a handle to be gripped by a user, a power generation unit disposed in the handle and configured to provide rotational power, a drive transmission unit coupled to the power generation unit and configured to be rotated by the rotational power, a cartridge including a blade housing on which one or more blades are seated, and a drive receiving unit formed at one side of the cartridge and configured to be in contact with the drive transmission unit to cause the blade housing to perform a linear movement in response to rotation of the drive transmission unit, wherein the cartridge is coupled to the handle such that the cartridge is pivotable about a pivot axis perpendicular to a rotational axis of the power generation unit, and wherein the pivot axis intersects the drive transmission unit.

First claim

The invention claimed is:

1. A razor, comprising:
a handle;
a motor disposed in the handle and configured to provide rotational power;
a rotating shaft assembly coupled to the motor and configured to be rotated by the rotational power;
a cartridge including a blade housing on which one or more blades are seated; and
an eccentric cam receptacle formed at a rear surface of the blade housing and configured to be in contact with the rotating shaft assembly to cause the blade housing to perform a linear movement in response to rotation of the rotating shaft assembly,
wherein the cartridge is coupled to the handle such that the cartridge is pivotable about a pivot axis perpendicular to a rotational axis of the rotating shaft assembly,
wherein the pivot axis passes through the rotating shaft assembly,
wherein the rotating shaft assembly is configured to press the eccentric cam receptacle, during rotation of the rotating shaft assembly, toward a shaving direction of the razor in which the one or more blades cut hair,
wherein the rotating shaft assembly includes an eccentric cam head eccentrically connected to the rotating shaft assembly so that a central axis of the eccentric cam head does not coincide with a rotation axis of the rotating shaft assembly, and
wherein a position of the eccentric cam receptacle is fixed relative to the one or more blades so that the eccentric cam receptacle and the one or more blades move up and down in a same direction.

2. The razor of claim 1 , further comprising a cartridge housing configured to guide the linear movement of the blade housing.

3. The razor of claim 2 , further comprising:
a rail at each side of the cartridge housing; and
a slider bar at each corresponding side of the blade housing,
wherein the cartridge housing guides the linear movement of the blade housing as the slide bars move along the rails.

4. The razor of claim 3 , wherein one end of each slide bar has a chamfer shape for reducing an area of contact with a corresponding rail.

5. The razor of claim 1 , wherein the rotating shaft assembly comprises:
an eccentric cam head having at least a partially curved outer surface.

6. The razor of claim 2 , further comprising a hinge assembly configured to:
couple the cartridge housing to the handle; and
provide the pivot axis for the cartridge to pivot.

7. The razor of claim 6 , wherein the hinge assembly comprises:
an elastic portion configured to restore the cartridge to an initial state when the cartridge is pivoted about the pivot axis.

8. The razor of claim 7 , wherein the elastic portion has elasticity, and is configured to be in contact with a rear of the cartridge housing.

9. The razor of claim 6 , wherein:
the hinge assembly comprises a boss protruding outwardly from each side thereof; and
the cartridge housing comprises boss grooves each configured to engage a corresponding boss of the hinge assembly.

10. The razor of claim 9 , wherein the pivot axis is aligned with the bosses engaged with the boss grooves.

11. The razor of claim 1 , wherein the eccentric cam receptacle comprises:
an upper receiving section and a lower receiving section which protrude toward a rear of the blade housing, and
wherein the upper receiving section and the lower receiving section are parallel and spaced apart by a predetermined distance.

12. The razor of claim 11 , wherein the upper receiving section and the lower receiving section define a space therebetween in which the rotating shaft assembly is inserted.

13. The razor of claim 12 , wherein the rotating shaft assembly is further configured to apply a force to the upper receiving section or the lower receiving section as it is rotated, causing the blade housing to perform the linear movement.

14. The razor of claim 1 , wherein, in an initial state, an angle generated by a skin-contact surface of the cartridge and the rotational axis is in a range of about 30° to 60°.

15. A razor, comprising:
a handle;
a motor disposed in the handle;
a cartridge including a blade housing on which one or more blades are seated;
an eccentric cam receptacle formed at a rear surface of the blade housing; and
a rotating shaft assembly configured to transmit power generated by the motor to the eccentric cam receptacle, causing the eccentric cam receptacle to move such that the blade housing performs a linear movement,
wherein the cartridge is pivotably coupled to the handle about a pivot axis parallel to a longitudinal direction of the one or more blades,
wherein the pivot axis passes through the rotating shaft assembly,
wherein the rotating shaft assembly is configured to press the eccentric cam receptacle, during rotation of the rotating shaft assembly, toward a shaving direction of the razor in which the one or more blades cut hair,
wherein the rotating shaft assembly includes an eccentric cam head eccentrically connected to the rotating shaft assembly so that a central axis of the eccentric cam head does not coincide with a rotation axis of the rotating shaft assembly, and
wherein a position of the eccentric cam receptacle is fixed relative to the one or more blades so that the eccentric cam receptacle and the one or more blades move up and down in a same direction.

Assignees

• Dorco Co Ltd

Inventors

• Park Young Ho
• Lee Jae Joon
• Son Sung Hee
• Park Shin Hwan

Classifications

• B26B19/12 Primary

  of the oscillating- cutter type; Cutting heads therefor; Cutters therefor (B26B19/04 takes precedence) · CPC title

• B26B21/4018

  Guard elements · CPC title

• B26B21/222 Primary

  with the blades moulded into, or attached to, a changeable unit (B26B21/4006 takes precedence) · CPC title

• B26B21/4012

  Housing details, e.g. for cartridges · CPC title

• B26B21/521

  Connection details, e.g. connection to razor heads · CPC title