US 4,284,877 A · Electrically heated hair curler

Abstract

A hair curler comprising an elongated substantially hollow hair bobbin includes a PTC heating element having a temperature self-controlling function housed within the hair bobbin. A pair of opposed cup-shaped generally cylindrical members are housed within the bobbin with each cylindrical member including a bottom and a side wall. The heating element is held between the opposed bottoms of the cup-shaped members. Each of the bottoms of the cup-shaped members defines an electrode plate arranged in contact with a respective side of the heating element for transmitting electricity to the heating element and conducting heat from the heating element to the side wall of the respective member. The side wall of each member defines conductors for transmitting the heat to the ends of the hair bobbin. A power supplying pin includes first and second power supplying terminals which are connected to a respective one of the electrode plates. The power supplying pin further includes an insulator interposed between the terminals. One end of the power supplying pin extends in one direction through the heating element and both electrode plates for fastening the heating element and the electrode plates together. Another end of the pin extends in an opposite direction along a longitudinal axis of the hair bobbin toward an open end of the bobbin. The power supplying pin is accessible through the open end of the bobbin and is adapted to be connected to a power source.

Claims15

Dependent claims

A hair curler comprising an elongated hair bobbin including an opening at one end, a PTC heating element having a temperature self-controlling function housed in said hair bobbin and including two opposing sides, a pair of opposed cup-shaped generally cylindrical members housed in said bobbin, each cylindrical member including a bottom and a side wall, said heating element being held between the opposed bottoms of said cup-shaped members, each of said bottoms defining an electrode plate arranged in contact with a side of said heating element for conducting heat from said heating element to the side wall of each member, the latter defining heat conductors for transmitting the heat of the heating element to the hair bobbin, and a power supplying pin comprising first and second power supplying terminals which are connected to a respective one of said electrode plates and an insulator interposed between said terminals, one end of said power supplying pin extending in one direction through said heating element and electrode plates for fastening the heating element and said electrode plates together and another end of said pin extending in an opposite direction along a longitudinal axis of the hair bobbin toward said opening of the bobbin, said pin being accessible through said opening and being adapted for connection to a power source.

A hair curler comprising:

an elongated substantially hollow hair bobbin opened at both ends in the axial direction,
a PTC heating element housed in said hair bobbin intermediate said ends, said heating element including opposite side faces disposed toward said ends,
first and second heat conducting members, each member comprising an electrode plate part and a heat conductor part extending substantially perpendicularly from said electrode plate part,
said electrode plate parts of said first and second heat conducting members being held in electrical contact with respective ones of said side faces of said heating element to retain said element between said electrode plate parts,
each of said heat conductor parts of said first and second heat conducting members extending away from the electrode plate part thereof substantially along an inner periphery of said hair bobbin toward opposite ends of the bobbin, and
means for supplying electric power to said electrode plate parts and therethrough to said heating element to generate heat therein, said heat generated being transmitted from the heating element through the respective electrode plate parts and heat conductor parts of the first and second heat conducting members to the hair bobbin, said power supplying means comprising:
a first electrical power supply terminal having:
a first end extending through both of said electrode plate parts and said heating element and being
electrically connected with a first of said electrode plate parts, and
electrically insulated from a second of said electrode plate parts and said heating element, and
a second end extending away from said second electrode plate part in the axial direction of said bobbin,
a second electrical power supply terminal having:
a first end electrically connected to said second electrode plate part, and
a second end extending away from said second electrode plate part alongside said second end of said first terminal and electrically insulated therefrom,
said second end of the first and second electrical power supply terminals being accessible through one of said open ends of the bobbin and being adapted for connection to a power source.

12 more elements

Dependencies are inferred from the claim text.

Electrically heated hair curler

Life of this patent

Electrically heated hair curler

Life of this patent

Abstract

Claims15