Electric hair trimmer

Patent metadata

Field	Value
Publication number	US-2016129601-A1
Application number	US-201614995795-A
Country	US
Kind code	A1
Filing date	Jan 14, 2016
Priority date	Jan 12, 2012
Publication date	May 12, 2016
Grant date	—

Abstract

A cutter head for an electric hair trimmer generally includes a cutting assembly having a stationary blade, a movable blade, and a follower connected to the movable blade. The electric hair trimmer has a handle with a drive system and an ejection mechanism. The follower is configured for operative connection with the drive system of the handle for oscillating the movable blade relative to the stationary blade. The cutter head also includes a housing having a tongue configured to provide clearance for the follower when the cutter head is ejected from the handle via the ejection mechanism.

First claim

What is claimed is:

1 . A cutter head for an electric hair trimmer having a handle with a drive system and an ejection mechanism, said cutter head comprising:
a cutting assembly comprising a stationary blade, a movable blade, and a follower connected to the movable blade, wherein the follower is configured for operative connection with the drive system of the handle for oscillating the movable blade relative to the stationary blade; and a housing comprising a tongue, wherein the tongue is configured to provide clearance for the follower when the cutter head is ejected from the handle via the ejection mechanism.

2 . The cutter head set forth in claim 1 , wherein the tongue has an arcuate shape.

3 . The cutter head set forth in claim 1 further comprising a clip configured to connect the cutter head to the handle.

4 . The cutter head set forth in claim 1 , wherein the handle has a front wall defining an aperture, the tongue being configured to cover the aperture when the cutter head is connected to the handle.

5 . The cutter head set forth in claim 1 , wherein each of the tongue and the follower have a profile, the tongue profile being larger than the follower profile in at least one dimension to facilitate the tongue providing clearance for the follower.

6 . The cutter head set forth in claim 1 , wherein the cutter head is slidable onto and off of the handle in a direction oblique to a longitudinal axis of the handle.

7 . The cutter head set forth in claim 6 further comprising a slide that is displaceable relative to the handle to initiate ejection of the cutter head from the handle along the slidable direction of the cutter head.

8 . The cutter head set forth in claim 7 , wherein the slide is configured to engage with a resilient member to facilitate ejection of the cutter head from the handle in the slidable direction of the cutter head.

9 . The cutter head set forth in claim 8 , wherein the resilient member is in the form of a spring, the slide being displaceable against the bias of the spring to initiate ejection of the cutter head.

10 . The cutter head set forth in claim 1 , wherein the cutting assembly is at least partially disposed within the housing and the housing is releasably connectable with the handle such that the housing is in operative connection with the ejection mechanism, the housing and the cutting assembly being configured for ejection from the handle by the ejection mechanism.

11 . The cutter head set forth in claim 10 , wherein the stationary blade and the movable blade each have a plurality of teeth, the movable blade teeth being maintained in shearing contact with the stationary blade teeth along a shearing plane, the housing comprising a plurality of guard teeth adjacent the movable blade teeth.

12 . The cutter head set forth in claim 11 wherein each guard tooth has a substantially diamond-shaped profile.

13 . The cutter head set forth in claim 12 wherein the substantially diamond-shaped profile has a pair of sides forming an acutely angled distal tip.

14 . The cutter head set forth in claim 13 wherein the housing comprises a pair of side walls each having a profile, the diamond-shaped profile being completely within the profile of each of the side walls.

15 . The cutter head set forth in claim 14 wherein the side walls extend beyond the movable blade but not beyond the stationary blade.

16 . The cutter head set forth in claim 13 wherein a first one of the sides of the acutely angled distal tip is oriented obliquely relative to the shearing plane.

17 . The cutter head set forth in claim 16 wherein a second one of the sides of the acutely angled distal tip is oriented obliquely relative to the shearing plane.

18 . The cutter head set forth in claim 16 wherein each tooth of the plurality of teeth of the movable blade has a tip, the distal tip being recessed relative to the tip of an associated movable blade tooth and the first one of the sides being oriented parallel to a first imaginary line that is substantially tangent to the tip of the associated movable blade tooth.

19 . The cutter head set forth in claim 18 wherein the first one of the sides is offset from the first imaginary line by about 0.2 millimeters (mm).

20 . The cutter head set forth in claim 18 wherein a second imaginary line that is substantially perpendicular to the shearing plane and is tangent to the distal tip is offset relative to the tip of the associated movable blade tooth by about 0.5 millimeters (mm) measured in the shearing plane.

Assignees

• Spectrum Brands Inc

Inventors

• Kammer Carl Gottfried
• Johnson Andrew David

Classifications

• B26B19/12 Primary

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

• B26B19/386

  Means for attaching the head thereto · CPC title

• B26B19/3846

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

• B65D75/36

  one sheet or blank being recessed and the other formed of relatively stiff flat sheet material, e.g. blister packages {, the recess or recesses being preformed (B65D73/0057, B65D73/0092 take precedence)} · CPC title

• B26B19/38 Primary

  Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards (cutters, cutting heads B26B19/04, B26B19/12, B26B19/14; cleaning or disinfecting devices A45D27/46; drying devices A45D27/48; casings for electric apparatus in general H05K) · CPC title