Abstract:
A hair styler and its heating device which can heat the thermal storage piece inside the hair roller quickly to a desired temperature by electromagnetic heating. The thermal storage piece is made of high thermal conductivity material which absorbs heat quite quick and disposed inside the hair roller to prevent the hair from directly contacting the thermal storage piece during hair styling, consequently preventing the hair from being burned. Then a low thermal conductivity isolating layer retains the heat within the hair roller and enables the heat to be uniformly and constantly transmitted to the outer surface of the hair roller, providing an effect of low energy consumption and long-lasting heat. A temperature sensing piece is used to detect and indicate the temperature of the hair styler by using different colors, making it easier for the user to know the temperature of the hair styler.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a hair styler and a heating device, and more particularly to an electromagnetically heated hair styler, and the temperature condition of the hair styler is easily recognizable. 
     2. Description of the Prior Art 
       FIGS. 1 and 2  show a conventional hair styler with an electric heating device  80 ,  800 , wherein the electric heating device  80  comprises a base  81  and a plurality of connectors  82  suspending from the base  81  and electrically connected in pairs to a plurality of hair rollers  90  which are equipped with electric heating members  91 . The electric heating device  800  shown in  FIG. 2  is a hair clip equipped with an electric heating member  810  to heat a hair roller  900 , so that the hair can be heated and styled by winding around the hair roller  900 . 
     It is to be noted that, during hair styling by hot perming, perm lotion is usually used to modify the hair texture after rolling hair with hair rollers, then mold the hair into a desired style by heating, hence, temperature control is key to the hair styling effect. However, hair will form a certain thickness of hair layer after winding around the hair roller, so that, the hair at the top surface of the hair layer that touches the hair roller as shown in  FIG. 1  and that touches the hair clip as shown in  FIG. 2  will be subjected to a relatively high temperature as compared to the hair at the bottom of the hair layer, which will result in an ununiformity of heating, and consequently affecting the hair styling effect. 
     Besides, the conventional electric heating devices  80 ,  800  require constant power supply, therefore, the hair rollers  90 ,  900  need to be connected with a power line, which not only increases the size of the hair styler, but also makes the use of the hair styler inconvenient during hair styling. Furthermore, the hair styler is required to be maintained at the temperature of 120-180 Celsius degrees during the whole process of hair styling, which suffers the disadvantage of high energy consumption. Another disadvantage is that perm lotion used in hair styling will inevitably be brought into contact with the hair rollers and clips, which makes the hair rollers and clips difficult to clean and causes sanitation problem. 
     The present invention has arisen to mitigate and/or obviate the afore-described disadvantages. 
     SUMMARY OF THE INVENTION 
     The primary objective of the present invention is to provide a hair styler and its heating device, wherein the thermal storage piece inside the hair roller can be quickly heated to a desired temperature by electromagnetic heating. The thermal storage piece is made of high thermal conductivity material which can absorbs heat quite quick, and then a low thermal conductivity isolating layer retains the heat within the hair roller and enables the heat to be uniformly and constantly transmitted to the outer surface of the hair roller, providing an effect of low energy consumption and long-lasting heat. 
     Another objective of the present invention is to provide a hair styler and its heating device, wherein the hair roller is used in combination with a hair clip equipped with an electromagnetic heating unit, a space is defined between the hair roller and the hair clip to hold the hair, and heat energy can be uniformly accumulated in the space to heat the hair uniformly for a long period of time. 
     Yet another objective of the present invention is to provide a hair styler and its heating device, wherein a thermal storage piece is disposed inside the base of the hair roller or the hair clip, so as to prevent the hair from directly contacting the thermal storage piece during hair styling, and consequently preventing the hair from being burned. 
     Yet another objective of the present invention is to provide a hair styler and its heating device, wherein a plurality of thermal fins are arranged around the outer peripheral surface of the hair roller to fix the hair and to transmit heat to the outer layer of the hair, allowing the hair to be uniformly heated. 
     Yet another objective of the present invention is to provide a hair styler and its heating device, wherein a temperature sensing piece is used to detect and indicate the temperature of the hair styler by using different colors, making it easier for the user to know the temperature of the hair styler easily. 
     Yet another objective of the present invention is to provide a hair styler and its heating device, wherein the hair styler is electromagnetically heated, which offers the advantages of quick heating and simplifying the hair styler. 
     To achieve the above objectives, a hair styling heating apparatus in accordance with the present invention comprises a heating device and a hair styler. The heating device includes a housing which is formed with an inner space for holding the hair styler, in the housing is disposed an electromagnetic heating unit. The hair styler includes a base and a thermal storage piece inside the base, the thermal storage piece is made of steel and heated by the electromagnetic heating unit, the hair styler is disposed in the inner space of the heating device, heat is transmitted from the thermal storage piece inside the base to an outer surface of the base to heat hair. 
     To achieve the above objectives, a hair styling heating apparatus in accordance with the present invention comprises an electromagnetic heating device and a hair roller. The hair roller comprises a base which is formed with an inner chamber, an isolating layer on the inner surface of the inner chamber, and a thermal storage piece disposed on the isolating layer around an outer peripheral surface of the base are arranged a plurality of thermal fins to fix the hair winding around the hair roller, the isolating layer is made of mica, and the thermal storage piece is made of steel and rolled into an elastic roll structure to elastically press against the isolating layer. The heating device includes a housing which is formed with an inner space for holding the hair roller, in the housing is disposed an electromagnetic heating unit  42  which is used to heat the thermal storage piece, hair winds around the base of the hair roller, heat is transmitted from the thermal storage piece inside the base to an outer surface of the base to perform hair styling by heating the hair. 
     To achieve the above objectives, a hair styling heating apparatus in accordance with the present invention comprises a hair roller and a hair clip used in combination with an electromagnetic heating device. The hair roller includes a base, an isolating layer and a thermal storage piece inside the base, around an outer peripheral surface of the base are formed a plurality of thermal fins, the isolating layer is made of low thermal conductivity material, and the thermal storage piece is made of steel and rolled into an elastic roll structure to elastically press against the isolating layer. The hair clip includes a body formed by two clip members, and a torsion spring arranged between the two clip members, in each of the clip members is formed a steel made thermal storage layer. The heating device includes a housing which is formed with an inner space for holding the hair roller or the hair clip, in the housing is disposed an electromagnetic heating unit which is used to heat the thermal storage piece of the hair roller or the thermal storage layer of the hair clip. Hair winds around the hair roller and is fixed by the hair clip, heat of the thermal storage piece of the hair roller or the thermal storage layer of the hair clip is used to heat the hair. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a conventional hair roller with an electric heating device; 
         FIG. 2  is a perspective view of a conventional hair clip with an electric heating device; 
         FIG. 3  is a perspective view of a hair roller and a heating device in accordance with the present invention; 
         FIG. 4  is a cross sectional view of a hair roller and a heating device in accordance with the present invention; 
         FIG. 5  is a block diagram showing the hair roller and the heating device in accordance with the present invention; 
         FIG. 6  is an exploded view of the hair roller in accordance with the present invention; 
         FIG. 7  is a cross sectional view of the hair roller in accordance with the present invention; 
         FIG. 8  is an enlarged view of a part of  FIG. 7 ; 
         FIG. 9  is a cross sectional view of a hair clip in accordance with the present invention; and 
         FIG. 10  is an enlarged view of a part of  FIG. 9 . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention. 
     Referring to  FIGS. 3-8 , a hair styling heating apparatus in accordance with the present invention includes a heating device B and a hair styler which can be a hair roller A which is heated by the heating device B, wherein the heating device B comprises a housing  40  which is formed with an inner space  401  for holding and heating the hair roller A or a hair clip C. The housing  40  is provided on an outer surface thereof with a switch  402 , a power line  403 , a switch lamp  404  and a running lamp  405 . In the housing  40  are disposed a control circuit  41 , an electromagnetic heating unit  42  and a far infrared temperature sensor  43 . 
     As shown in  FIGS. 4 and 5 , the control circuit  41  is electrically connected to the switch lamp  404  and then electrically connected to the power line  403  via the switch  402 . The electromagnetic heating unit  42  includes a heating disc  421  disposed at an inner bottom of the inner space  401 , and a heat generator  422  located at an outer bottom of the inner space  401 . The heat generator  422  generates heat by electromagnetic induction and is controlled by the control circuit  41  to supply heat to the heating disc  421  to heat the hair roller A or the hair clip C disposed in the inner space  401  of the heating device B. The far infrared temperature sensor  43  is controlled by the control circuit  41  to sense the temperature of the hair roller A or the hair clip C by detecting the far infrared energy emitted from the hair roller A or the hair clip C. The far infrared temperature sensor  43  is electrically connected to the running lamp  405  via the control circuit  41  to indicate the heating condition of the hair styler by using different lamps. 
     The hair styler of the present invention can be the hair roller A which can be used independently after being electromagnetically heated, or the hair styler of the present invention can be the combination of the hair roller A and the hair clip C. As shown in  FIGS. 6-8 , the hair roller A comprises a base  10  which is formed with an inner chamber  11 , an isolating layer  20  on the inner surface of the inner chamber  11 , and a thermal storage piece  30  disposed on the isolating layer  20 . Around the outer peripheral surface of the base  10  are arranged a plurality of thermal fins  12  to fix the hair winding around the hair roller A and to transmit the heat from the hair roller A to the hair. The isolating layer  20  is made of low thermal conductivity material, and the thermal storage piece  30  is made of steel and rolled into an elastic roll structure to elastically press against the isolating layer  20 , so that the thermal storage piece  30  and the isolating layer  20  are assembled together to form a temperature structure. 
     The heating device B of the present invention serves to quickly heat the hair roller A by using the steel made thermal storage piece  30 . The thermal storage piece  30  is formed along the axial direction of the base  10  with a slot  31  which makes the thermal storage piece  30  expandable and flexible, so that the thermal storage piece  30  can be flexibly pressed against the isolating layer  20 . The isolating layer  20  between the base  10  and the thermal storage piece  30  is able to retain the heat within the hair roller A. Besides, the isolating layer  20  which is made of low thermal conductivity material allows the heat to be evenly and smoothly distributed over the outer surface of the hair roller A via the base  10  and the thermal fins  12 , so that temperature retaining structure of the hair roller A, after being heated, can be maintained at a relatively high temperature for a long time to enable the hair roller A to perform hair styling. The isolating layer  20  is preferably made of mica. 
     An end surface of the base  10  of the hair roller A is formed with an engaging groove  14  for holding a temperature sensing piece  13  whose color changes with temperature. One end of the thermal storage piece  30  extends toward the temperature sensing piece  13  to form a heat transmission piece  32  with a connecting section  321  which is to be pressed against the inner surface of the inner chamber  11  of the base  10 . Heat stored in the thermal storage piece  30  of the hair roller A is transmitted to the base  10  via the heat transmission piece  32  to enable the temperature sensing piece  13  to detect the temperature condition of the hair roller A. For example, the color of the temperature sensing piece  13  is red at a room temperature, and will change into white when the temperature of the hair roller A reaches a predetermined value, so as to remind the user that the hair roller A has been heated to a desired temperature. 
     In this embodiment, as shown in  FIG. 7 , the base  10  consists of a shell  101  and a cover  102 . The inner chamber  11  is formed inside the shell  101 , the thermal fins  12  are provided on the outer surface of the shell  101 , and the temperature sensing piece  13  is located at an end surface of the shell  101 . The shell  101  is formed around an outer surface thereof adjacent to an open end of the inner chamber  11  with a positioning rib  16 . The cover  102  is formed with an engaging flange  17  which is engaged with the positioning rib  16  of the shell  101  to form the hollow base  10 . As shown in  FIG. 8 , the inner chamber  11  of the base  10  of the hair roller A is formed with a positioning boss  15  aligned with the engaging groove  14 , and the connecting section  321  of the heat transmission piece  32  of the thermal storage piece  30  is formed with an engaging recess  322  for engaging with the positioning boss  15 , so as to fix the heat transmission piece  32  to the base  10  of the hair roller A. 
       FIGS. 9 and 10  show another embodiment of the present invention, wherein the hair styler of the present invention is a hair clip C which is used in combination with a traditional hair roller or the abovementioned hair roller A which is heated in an electromagnetic way. The hair clip C includes a body  50  formed by two clip members  501 ,  502 , and a torsion spring  60 . Each of the clip members  501 ,  502  is formed with an abutting portion  51 , and an engaging portion  52  and an arc-shaped portion  53  located at two sides of the abutting portion  51 , respectively. Each of the arc-shaped portions  53  of the two clip members  501 ,  502  includes an inner arc-shaped surface  531  and an outer arc-shaped surface  532 , in the outer arc-shaped surface  532  is embedded a temperature sensing piece  54  whose color changes with temperature, and between the inner and outer arc-shaped surfaces  531 ,  532  is disposed a steel made thermal storage layer  55  which serves as a temperature retaining structure of the hair clip C. The torsion spring  60  is disposed between the engaging portions  52  of the two clip members  501 ,  502  to make the two abutting portions  51  press against each other, and make the inner arc-shaped surfaces  531  of the two arc-shaped portions  53  elastically engaged with each other. 
     The hair roller A and the hair clip C are electromagnetically heated, and the two inner arc-shaped surfaces  531  of the two clip members  501 ,  502  are clamped against the outer periphery of the hair roller A to fix the hair winding around the roller A. The hair roller A and the hair clip C are uniformly heated by the temperature retaining structure, including the thermal storage layer  55  and the isolating layer  20 , respectively, and the arc-shaped portions  53  of the hair clip C are clamped against the outer surface of the base  10  of the hair roller A so as to further reduce the heat dissipation of the hair roller A, maintaining the hair roller A at a relatively high temperature for a long time while preventing the hair from being brought into direct contact with the high temperature elements of the hair roller. 
     In this embodiment, each of the outer arc-shaped surfaces  532  of the arc-shaped portions  53  of the hair clip C is formed with a receiving groove  533  and an assembling groove  534 . The temperature sensing piece  54  which changes color with temperature is received in the receiving groove  533  to indicate the temperature condition of the clip C. The assembling groove  534  is a stepped structure, the thermal storage layer  55  is disposed at a bottom of the assembling groove  534 , and a positioning member  56  is disposed at the top of the assembling groove  534  to fix the thermal storage layer  55 . 
     To summarize, the hair styler and the heating device of the present invention offer the following advantages: 
     1. using electromagnetic heating method to heat the high thermal conductivity steel made thermal storage piece  30 , and then using the low thermal conductivity isolating layer  20  to transmit heat from the thermal storage piece  30  at a constant rate to the hair roller A. Hence, as compared to the conventional hair styler, the present invention has less electricity consumption and can maintain the hair roller A at a high temperature for a longer time. 
     2. thermal fins  12  around the outer peripheral surface of the base  10  of the hair roller A is used in combination with the hair clip C to allow hair to be more easily fixed and styled, and also allow the hair to be heated more uniformly. 
     3. the temperature sensing pieces  13 ,  54  make it easier to know the heating and temperature condition of the hair styler, preventing that the temperature is too low to effect the hair styling affect or the temperature is too high to burn the hair. 
     4. the electromagnetic heating method not only has the advantages of fast heating and low energy consumption, but also simplifies the hair styler, making the use of the hair styler easier. 
     While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.