Hair clipper pivot motor designed for battery power

Patent metadata

Field	Value
Publication number	US-12142983-B2
Application number	US-202117357535-A
Country	US
Kind code	B2
Filing date	Jun 24, 2021
Priority date	Jun 29, 2020
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

A pivot motor for a hair clipper is provided, including a stator with a plurality of laminations, a bobbin located in operational relation to the stator and having a coil of wire wound around the bobbin, an armature being configured for driving a hair clipper moving blade at one end, and having at least one magnet at an opposite end, the armature having a pivot point, and the motor being configured for operation between 2.5 and 4.2 Volts.

First claim

The invention claimed is:

1. A hair clipper, comprising:
a hair clipper housing;
a hair clipper bladeset operatively associated with said housing and including a stationary blade and a moving blade configured for lateral reciprocation relative to said stationary blade;
a pivot motor mounted in said hair clipper and electrically connected to a power source within said hair clipper housing, wherein said pivot motor includes:
a stator with a plurality of laminations and having a length in the range of 23-27 mm and a width in the range of 28-35 mm;
a bobbin located in operational relation to said stator and having a coil of wire wound around said bobbin, wherein said bobbin is provided with a coil of 26 Gauge or thicker wire;
an armature being configured for driving said moving blade at a first end, and having at least one magnet at a second end, said armature having a pivot point; and
said motor being configured for operation between 2.5 and 4.2 Volts.

2. The hair clipper of claim 1 , wherein said armature is constructed and arranged so that said at least one magnet has a plurality of surfaces, and is encapsulated on all but one surface by said armature.

3. The hair clipper of claim 1 , wherein said pivot point of said armature is located closer to the first end of said armature than to the second end, said second end accommodating said at least one magnet.

4. The hair clipper of claim 3 , wherein a ratio of a distance of said pivot point to the second end of said armature accommodating said at least one magnet; to a distance from said pivot point to the first end of said armature is 2.1:1.

5. The hair clipper of claim 1 , further including a sensor operationally associated with said motor, constructed and arranged for measuring an operational stroke of said armature, and configured for being electrically connected to a controller of said motor for adjusting motor voltage as a function of said sensed armature stroke using Pulse Width Modulation.

6. The hair clipper of claim 5 , wherein said sensor is an opto-sensor.

7. The hair clipper of claim 5 , wherein said controller is configured so that as said sensed armature stroke decreases, said motor voltage increases.

8. The hair clipper of claim 1 , further including a support plate to which said stator is connected, said support plate also being a mounting point for said armature.

9. The hair clipper of claim 8 , wherein said stator is connected to said support plate by welding.

10. The hair clipper of claim 1 , wherein said wire used in said coil is 22 to 26 Gauge wire.

11. A hair clipper, comprising:
a hair clipper housing;
a hair clipper bladeset operatively associated with said housing and including a stationary blade and a moving blade configured for lateral reciprocation relative to said stationary blade;
a pivot motor mounted in said hair clipper and electrically connected to a power source within said hair clipper housing, wherein said pivot motor includes:
a stator with a plurality of laminations;
a bobbin located in operational relation to said stator and having a coil of wire wound around said bobbin, wherein said bobbin is provided with a coil of 26 Gauge or thicker wire;
an armature being configured for driving said moving blade at a first end, and having at least one magnet at a second end, said armature having a pivot point; and
said stator has length taken along a longitudinal axis of the hair clipper in the range of 23-27 mm and a width in the range of 28-35 mm.

12. The hair clipper of claim 11 , wherein said bobbin is provided with a coil of 22 to 26 Gauge wire.

13. The hair clipper of claim 12 , wherein said coil includes 75 turns of wire.

14. A hair clipper, comprising:
a hair clipper housing;
a hair clipper bladeset operatively associated with said housing and including a stationary blade and a moving blade configured for lateral reciprocation relative to said stationary blade;
a pivot motor mounted in said hair clipper and electrically connected to a power source within said hair clipper housing, wherein said pivot motor includes:
a stator with a plurality of laminations, wherein said stator has length taken along a longitudinal axis of the hair clipper in the range of 23-27 mm and a width in the range of 28-35 mm;
a bobbin located in operational relation to said stator and having a coil of wire wound around said bobbin;
an armature being configured for driving said moving blade at one end, and having at least one magnet at an opposite end, said armature having a pivot point;
a sensor associated with said clipper housing and constructed and arranged for measuring an operational stroke of said armature, and being electrically connected to a controller of said motor for adjusting motor voltage as a function of said sensed armature stroke using Pulse Width Modulation, said controller is configured so that as said sensed armature stroke decreases, said motor voltage increases.

15. The hair clipper of claim 14 , wherein said bobbin is provided with a coil of 26 Gauge or thicker wire.

Assignees

• Wahl Clipper Corp

Inventors

• Todd David Joseph
• Syed Rafi
• De Frang Curtis James
• Beha Stephan
• Taylor Dustin R
• Freas Jon Thomas
• Everly Jason Kyle
• Blumhoff Daniel Adam
• Usterbowski Matthew
• Brahmandam Sudhir
• Bowers Matthew Jason
• Melton Scott
• Mitchell Drew Paul

Classifications

• H02K11/22

  Optical devices · CPC title

• B26B19/388 Primary

  Sensors; Control · CPC title

• B26B19/282

  Motors without a rotating central drive shaft, e.g. linear motors · CPC title

• B26B19/06

  involving co-operating cutting elements both of which have shearing teeth · CPC title

• H02K33/02

  with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs · CPC title