Hair removal tool

Patent metadata

Field	Value
Publication number	US-10016041-B2
Application number	US-201414767282-A
Country	US
Kind code	B2
Filing date	Jan 23, 2014
Priority date	Feb 13, 2013
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

A hair removal tool is equipped with: a drive unit for driving a blade; a load detection unit for detecting the size of the load on the drive unit; and a control unit for changing the drive mode of the drive unit between a first drive mode for driving the drive unit at a first drive speed, a second drive mode for driving the drive unit at a second drive speed which is faster than the first drive speed, and a transition mode for driving the drive unit at a transition speed which is faster than the second drive speed. A first interval is set as the interval from when the drive mode is changed from the first drive mode to the transition mode until when the drive mode is changed from the transition mode to the second drive mode. A second interval is set as the interval from when the drive mode is changed from the transition mode to the second drive mode until when the drive mode is changed from the second drive mode to the first drive mode. The first interval is shorter than the second interval.

First claim

The invention claimed is:

1. A hair removal tool comprising:
a driver that drives a blade;
a load detector that detects an amount of a load applied to the driver; and
a controller that shifts a drive mode of the driver among a first drive mode, in which the driver is driven at a first drive speed, a second drive mode, in which the driver is driven at a second drive speed, which is higher than the first drive speed, and a transition mode, in which the driver is driven at a transition speed that is higher than the second drive speed, wherein
the controller shifts the drive mode from the first drive mode to the transition mode and then to the second drive mode based on a detection result of the load detector and shifts the drive mode from the second drive mode to the first drive mode based on a detection result of the load detector,
a first period is set that is from when the drive mode is shifted from the first drive mode to the transition mode until the drive mode is shifted from the transition mode to the second drive mode,
a second period is set that is from when the drive mode is shifted from the transition mode to the second drive mode until the drive mode is shifted from the second drive mode to the first drive mode, and
the first period is shorter than the second period.

2. The hair removal tool according to claim 1 , wherein the controller changes the transition speed in accordance with a detection result of the load detector.

3. The hair removal tool according to claim 1 , wherein the controller changes the transition speed in accordance with a time elapsed from when the controller started to drive the driver.

4. The hair removal tool according to claim 1 comprising:
a battery charge state detector that detects a state of charge of a battery, which functions as a drive source of the driver, wherein
when the state of charge of the battery, which is detected by the battery charge state detector, is decreased from at least a lower limit to below the lower limit in the transition mode, the controller shifts the drive mode from the transition mode to the second drive mode and then to the first drive mode and executes a stop control.

5. The hair removal tool according to claim 4 , wherein when the state of charge of the battery, which is detected by the battery charge state detector, is decreased from at least the lower limit to below the lower limit in the second drive mode and a predetermined period ends from when the drive mode is shifted from the transition mode to the second drive mode, the controller shifts the drive mode from the second drive mode to the first drive mode and executes the stop control.

6. The hair removal tool according to claim 1 , wherein the controller changes the transition speed in accordance with a number of times the drive mode is shifted in a unit time.

7. A hair removal tool comprising:
a driver that drives a blade;
a load detector that detects an amount of a load applied to the driver; and
a controller that shifts a drive mode of the driver among a first drive mode, in which the driver is driven at a first drive speed, a second drive mode, in which the driver is driven at a second drive speed, which is higher than the first drive speed, and a low speed transition mode, in which the driver is driven at a transition speed which is lower than the first drive speed, wherein
the controller shifts the drive mode from the second drive mode to the low speed transition mode and then to the first drive speed based on a detection result of the load detector and shifts the drive mode from the first drive mode to the second drive mode based on a detection result of the load detector,
a first period is set that is from when the drive mode is shifted from the second drive mode to the low speed transition mode until the drive mode is shifted from the low speed transition mode to the first drive mode,
a second period is set that is from when the drive mode is shifted from the low speed transition mode to the first drive mode until the drive mode is shifted from the first drive mode to the second drive mode, and
the first period is shorter than the second period.

8. The hair removal tool according to claim 7 , wherein the controller changes the transition speed in accordance with a detection result of the load detector.

9. The hair removal tool according to claim 7 , wherein the controller changes the transition speed in accordance with a time elapsed from when the controller started to drive the driver.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Ohba Takafumi
• Asakawa Koji
• Yamasaki Masanobu
• Takaoka Yoichi

Classifications

• A45D26/00 Primary

  Hair-singeing apparatus; Apparatus for removing superfluous hair, e.g. tweezers (removing hair using electrosurgical instruments A61B18/04, A61B18/18) · CPC title

• B26B19/282 Primary

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

• H02P25/032

  Reciprocating, oscillating or vibrating motors · CPC title

• H02P29/02

  Providing protection against overload without automatic interruption of supply (protection against faults of stepper motors H02P8/36) · CPC title

• H02K33/16

  with polarised armatures moving in alternate directions by reversal or energisation of a single coil system · CPC title