Blade set, hair cutting appliance, and related manufacturing method

Patent metadata

Field	Value
Publication number	US-10647010-B2
Application number	US-201515323600-A
Country	US
Kind code	B2
Filing date	Jun 24, 2015
Priority date	Jul 4, 2014
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A hair cutting appliance (10), a blade set (20) for a hair cutting appliance (10). and to an integrally formed metal-plastic composite stationary blade (22) for said blade set (20) are described. The stationary blade (22) may include: a first wall portion (58) arranged to serve as a skin facing wall when in operation; a second wall portion (60) at least partially offset from the first wall portion (58), such that the first wall portion (58) and the second wall portion (60) define there between a guide slot (116) arranged to receive a movable cutter blade (24), at least one toothed leading edge (30) jointly formed by the first wall portion (58) and the second wall portion (60) and a plastic component (114) including at least one mounting element (36). The toothed leading edge (30) includes a plurality of teeth (90).

First claim

The invention claimed is:

1. An integrally formed metal-plastic composite stationary blade for a blade set of a hair cutting appliance, said blade set being arranged to be moved through hair in a moving direction to cut hair, said stationary blade comprising:
a first wall portion arranged to serve as a skin facing wall when in operation,
a second wall portion at least partially offset from the first wall portion, such that the first wall portion and the second wall portion define therebetween a guide slot arranged to receive a movable cutter blade,
at least one toothed leading edge jointly formed by the first wall portion and the second wall portion, and
a plastic component comprising at least one mounting element,
wherein the at least one toothed leading edge comprises a plurality of teeth,
wherein the first wall portion and the second wall portion are integrally made from a sheet metal component,
wherein the first wall portion and the second wall portion mutually define an inner metal shell of the stationary blade,
wherein the plastic component is molded to the second wall portion,
wherein the teeth of the at least one toothed leading edge comprise, when viewed in a cross-sectional plane perpendicular to a lateral direction (Y), a substantially U-shaped form comprising a first leg at the first wall portion and a second leg at the second wall portion, wherein the first leg and the second leg merge into one another at respective tips of the first leg and the second leg,
wherein the first leg, when viewed in a cross-sectional plane perpendicular to a longitudinal direction (X), comprises lateral cutting edges that are arranged to cooperate with respective cutting edges of the movable cutter blade, and wherein the second leg, when viewed in a cross-sectional plane perpendicular to the longitudinal direction (X), comprises a tapered portion at a top side, which side is the side facing the first wall portion, thereof, wherein the tapered portion is covered with plastic material of the plastic component.

2. The stationary blade as claimed in claim 1 , wherein the metal component is a bent sheet metal component, wherein the at least one toothed leading edge is formed at a U-shaped bending zone of the metal component, and wherein the teeth of the at least one toothed leading edge are formed from a pattern of slots arranged at the metal component, wherein the slots are generally extending in a longitudinal direction (X).

3. The stationary blade as claimed in claim 1 , wherein the at least one tooth leading edge is a first toothed leading edge, and the stationary blade further comprises: a second toothed leading edge, wherein the first wall portion extends from the first toothed leading edge to the second toothed leading edge in a substantially continuous fashion, wherein the second wall portion comprises a frontal portion extending from the first toothed leading edge to a center portion, and a rear portion extending from the second toothed leading edge to the center portion, wherein sides of the frontal portion and the rear portion face each other at the center portion.

4. The stationary blade as claimed in claim 3 , wherein the sides are mutually bonded at the center portion, and wherein the plastic component covers at least some bonding spots at a bottom side of the second wall portion.

5. The stationary blade as claimed in claim 3 , wherein the metal component from which the first wall portion and the second wall portion are made extends from the frontal portion of the second wall portion over the first toothed leading edge, the first wall portion and the second toothed leading edge towards the rear portion of the second wall portion.

6. The stationary blade as claimed in claim 1 , wherein the metal component, when viewed in a cross-sectional plane perpendicular to the lateral direction (Y), substantially encloses the guide slot for the movable cutter blade.

7. The stationary blade as claimed in claim 1 , wherein the plastic component and the metal component form an integrally formed part selected from the group consisting of insert-molded part, outsert-molded part and overmolded part.

8. The stationary blade as claimed in claim 1 , wherein the second wall portion comprises at least one cutout portion defining at least one opening through which, in a mounted state, the movable cutter blade is accessible for a transmitting member.

9. A blade set for a hair cutting appliance, said blade set being arranged to be moved through hair in a moving direction to cut hair, said blade set comprising:
a stationary blade as claimed in claim 1 , and
a movable cutter blade comprising at least one toothed leading edge, said movable cutter blade being movably arranged within the guide slot defined by the stationary blade, such that, upon relative motion between the movable cutter blade and the stationary blade, the at least one toothed leading edge of the movable cutter blade cooperates with corresponding teeth of the stationary blade to cut hair caught therebetween in a cutting action.

10. A integral metal-plastic composite stationary blade for a blade set arranged to be moved through hair in a moving direction to cut hair, the stationary blade comprising:
a first wall portion arranged to face skin when in operation,
a second wall portion at least partially offset from the first wall portion, such that the first wall portion and the second wall portion define therebetween a guide slot arranged to receive a movable cutter blade and mutually define an inner metal shell of the stationary blade, wherein the first wall portion and the second wall portion are integrally made from a sheet metal component;
at least one toothed leading edge jointly formed by the first wall portion and the second wall portion and comprising a plurality of teeth that comprise a first leg at the first wall portion and a second leg at the second wall portion, and
a plastic component that is molded to the second wall portion and comprising at least one mounting element,
wherein the first leg, when viewed in a cross-sectional plane perpendicular to a longitudinal direction (X), comprises lateral cutting edges that are arranged to cooperate with respective cutting edges of the movable cutter blade, and wherein the second leg, when viewed in a cross-sectional plane perpendicular to the longitudinal direction (X), comprises a tapered portion at a top side, which side is the side facing the first wall portion, thereof, wherein the tapered portion is covered with plastic material of the plastic component.

11. The stationary blade of claim 10 ,
wherein the teeth of the at least one toothed leading edge form, when viewed in a cross-sectional plane perpendicular to a lateral (Y) direction, a substantially U-shaped form comprising the first leg at the first wall portion and the second leg at the second wall portion, wherein the first leg and the second leg merge into one another at respective tips of the first leg and the second leg.

12. The stationary blade of claim 10 , wherein the metal component is a bent sheet metal component, wherein the at least one toothed leading edge is formed at a U-shaped bending zone of the metal component, and wherein the teeth of the at least one toothed leading edge are formed from a pattern of slots arranged at the metal component, wherein the slots are generally extending in a longitudinal direction (X).

13. The stationary blade of claim 10 , wherein the at least one tooth leading edge is a first toothed leading edge, and the stationary blade further comprises: a second toothed leading edge, wherein the first wall portion extends from the first toothed leading edge to the seco

Assignees

• Koninklijke Philips Nv

Inventors

• Sablatschan Siegfried

Classifications

• B26B19/20

  with provision for shearing hair of preselected or variable length · CPC title

• B26B19/063

  Movable or adjustable cutting head · CPC title

• B26B19/042 Primary

  Long hair cutters or older types comprising a cutting grid · CPC title

• B26B19/3846 Primary

  Blades; Cutters (B26B19/044, B26B19/141 take precedence) · CPC title

• B26B19/3893

  Manufacturing of shavers or clippers or components thereof · CPC title