Hair straightener

Patent metadata

Field	Value
Publication number	US-10980326-B2
Application number	US-201915733069-A
Country	US
Kind code	B2
Filing date	Jan 29, 2019
Priority date	Feb 9, 2018
Publication date	Apr 20, 2021
Grant date	Apr 20, 2021

Abstract

A hair straightener (HS) comprises a heating unit (HU) for heating hair while exercising a pressure on the hair, a temperature sensor (TS) for measuring a temperature of the heated hair to obtain a measured temperature, and a pressure adjustment unit (PAU) for adjusting the pressure exercised by the heating unit (HU) on the hair, in dependence on the measured temperature. The heating unit (HU) may comprise a pair of heating plates (HP 1 , HP 2 ) between which hair is clamped, and the pressure adjustment unit (PAU) may be arranged for changing a distance between the heating plates (HP 1 , HP 2 ). The pressure adjustment unit (PAU) may comprise a motor-operated push tool (W, C) for increasing the distance between the heating plates (HP 1 , HP 2 ) when the measured temperature exceeds a first threshold temperature. The hair straightener (HS) may comprise a pair of hinged arms (A 1 , A 2 ) each provided with a respective one of the heating plates (HP 1 , HP 2 ). The pressure adjustment unit (PAU) may comprise a motor-operated pull tool (W, S), for decreasing a distance between the hinged arms (A 1 , A 2 ) when the measured temperature falls below a second threshold temperature, whereby the distance between the heating plates (HP 1 , HP 2 ) is reduced.

First claim

The invention claimed is:

1. A hair straightener comprising:
a heating unit configured to:
heat hair while exercising a pressure on said hair;
a temperature sensor configured to:
measure a temperature of the heated hair to obtain a measured temperature; and
a pressure adjustment unit configured to:
adjust a pressure exercised by the heating unit on the hair in dependence on the measured temperature;

wherein the heating unit comprises a pair of heating plates between which hair is clamped,
wherein the pressure adjustment unit is arranged for changing a distance between the heating plates in dependence on the measured temperature; and comprises a motor-operated push tool configured to increase the distance between the heating plates when the measured temperature exceeds a first threshold temperature.

2. A hair straightener comprising:
a heating unit configured to:
heat hair while exercising a pressure on said hair;
a temperature sensor configured to:
measure a temperature of the heated hair to obtain a measured temperature; and
a pressure adjustment unit configured to:
adjust a pressure exercised by the heating unit on the

hair in dependence on the measured-temperature
wherein the heating unit comprises a pair of heating plates between which hair is clamped,
wherein the pressure adjustment unit is arranged for changing a
distance between the heating plates in dependence on the measured temperature;

wherein the hair straightener further comprises a pair of hinged arms each provided with a respective one of the heating plates, and
the pressure adjustment unit comprises a motor-operated pull tool configured to decrease a distance between the hinged arms when the measured temperature falls below a second threshold temperature, whereby the distance between the heating plates is reduced.

3. The hair straightener as claimed in claim 2 , wherein the motor-operated pull tool is coupled to a second arm and comprises:
a spring configured to:
generate a first pull force substantially parallel to the first arm, and
a force translation tool coupled to the first arm for translating the first pull force substantially parallel to the first arm into a second pull force substantially perpendicular to the first arm, to decrease the distance between the heating plates when the measured temperature falls below the second threshold temperature.

4. A hair straightener comprising:
a first arm; and
a second arm, said first arm and said second arm connected at a first end, at least one of said first arm and said second arm comprising:
a heating plate;
a motor-operated push tool;

a heating unit configured to:
heat said heating plate associated with one of said first arm and said second arm, wherein said heating plate is configured to:
heat a hair captured between said first arm and said second arm;

a temperature sensor configured to:
measure a temperature of the hair heated by said heating plate; and

a pressure adjustment unit configured to:
receive the measured temperature of the hair; and
alter a distance between the heating plates in dependence on the measured temperature, wherein said distance is increased when the measured temperature exceeds a first threshold temperature and said distance decreases when said measured temperature fails below a second threshold.

5. The hair straightener as claimed in claim 4 , wherein the motor-operated pull tool comprises:
a spring configured to:
generate a first pull force substantially parallel to said first arm, and
a force translation tool coupled to the first arm, said translation tool configured to:
translate the first pull force into a second pull force, wherein said second pull force is substantially perpendicular to the first arm.

6. A hair straightener comprising:
a heating unit comprising:
a pair of heating plates between which hair is clamped

a temperature sensor; and
a pressure adjustment unit comprising;
a motor configured to:
change a distance between the heating plates in dependence on a temperature measured by the temperature sensor, said distance between the heating plates increased when the temperature measured by the temperature sensor exceeds a first threshold temperature and deceased when the temperature measured by the temperature sensor falls below a second threshold temperature.

7. The hair straightener as claimed in claim 6 wherein the motor is coupled to a second arm of said hair straightener and comprises:
a spring configured to:
generate a first pull force substantially parallel to a first arm of said hair straightener, and
a force translation tool coupled to the first arm configured to:
translate the first pull force substantially parallel to the first arm into a second pull force substantially perpendicular to the first arm.

Assignees

• Koninklijke Philips Nv

Inventors

• Pang Chuen Yu Cyrus

Classifications

• A45D2/001 Primary

  Hair straightening appliances · CPC title

• A45D1/28

  with means for controlling or indicating the temperature · CPC title

• A45D1/14

  the jaws being separable from each other · CPC title

• A45D1/06 Primary

  with two or more jaws (A45D1/02 takes precedence) · CPC title

• A45D1/04 Primary

  by electricity · CPC title