Barrel for hair styling device
阅读说明:本技术 用于头发造型装置的筒体 (Barrel for hair styling device ) 是由 马科斯·费尔南德斯 蒂莫西·摩尔 安东尼·萨金特 于 2018-05-03 设计创作,主要内容包括:一种用于头发造型装置的筒体(12),该筒体包括:外表面(14);以及筒体内部的加热器安装表面(16);其中,加热器安装表面与外表面一体地形成。例如,筒体(12)可以形成为单个挤出金属部件。还提供了一种筒体组件(10),该筒体组件包括此种筒体(12)以及安装在加热器安装表面上的一个或多个加热器元件(20)。还提供了一种包括此种筒体组件的头发造型装置(例如卷发钳(30)、卷发棒或热铁刷)。还提供了一种用于头发造型装置的加热器元件,该加热器元件包括:具有导电轨道的基板,该导电轨道用于在向其施加电流时产生热量;以及一体式温度传感器。还提供了关于上述的制造方法。(A cartridge (12) for a hair styling device, the cartridge comprising: an outer surface (14); and a heater mounting surface (16) inside the barrel; wherein the heater mounting surface is integrally formed with the outer surface. For example, the barrel (12) may be formed as a single extruded metal part. A cartridge assembly (10) is also provided comprising such a cartridge (12) and one or more heater elements (20) mounted on a heater mounting surface. A hair styling device (e.g., curling iron (30), curling wand or hot iron brush) including such a cartridge assembly is also provided. There is also provided a heater element for a hair styling device, the heater element comprising: a substrate having a conductive track for generating heat when an electric current is applied thereto; and an integral temperature sensor. Methods of manufacture are also provided in relation to the above.)
1. A cartridge for a hair styling device, the cartridge comprising:
an outer surface; and
a heater mounting surface inside the barrel;
wherein the heater mounting surface is integrally formed with the outer surface.
2. The cartridge of claim 1, wherein the heater mounting surface extends across the interior of the cartridge from side to side.
3. The cartridge of claim 2, wherein the heater mounting surface is positioned substantially across a diameter of the cartridge.
4. The cartridge of claim 2, wherein the heater mounting surface is located away from a diameter of the cartridge.
5. The cartridge of any preceding claim, wherein the heater mounting surface is approximately twice the thickness of the outer surface.
6. The cartridge of any preceding claim, wherein the heater mounting surface is substantially planar.
7. The cartridge of any one of claims 1 to 5, wherein the heater mounting surface comprises a longitudinal recess for receiving one or more heater elements.
8. The cartridge of any preceding claim, wherein the outer surface has a circular cross-section.
9. The cartridge of any one of claims 1 to 7, wherein the outer surface has an elliptical cross-section.
10. The cartridge of any preceding claim formed as a single extruded component.
11. The cartridge of any preceding claim, made of metal.
12. A cartridge assembly for a hair styling device, the cartridge assembly comprising a cartridge according to any preceding claim, and one or more heater elements mounted on the heater mounting surface.
13. A cartridge assembly according to claim 12 when dependent on claim 7, wherein the or each heater element is mounted within the longitudinal recess.
14. A cartridge assembly according to claim 12 or 13, further comprising means for securing the or each heater element against the heater mounting surface.
15. The cartridge assembly of claim 14, wherein the means for securing comprises a spring means, such as a spring clip.
16. A cartridge assembly according to any of claims 12 to 15, wherein the or each heater element comprises: a substrate having electrically conductive tracks for generating heat when an electrical current is applied thereto; and an integral temperature sensor.
17. The cartridge assembly of claim 16, wherein the electrically conductive track and the temperature sensor are formed as parallel layers embedded within the substrate.
18. The cartridge assembly of claim 16 or 17, wherein the temperature sensor comprises a resistive track, the resistance of the resistive track varying with temperature.
19. The cartridge assembly of any of claims 16-18, wherein the embedded temperature sensor is molecularly bonded to the substrate.
20. The cartridge assembly of claim 19, wherein said substrate comprises a ceramic material.
21. A hair styling device comprising a cartridge assembly according to any one of claims 12 to 20.
22. The hair styling device of claim 21 selected from the group consisting of: curling tongs, curling bars and hot iron brushes.
23. A heater element for a hair styling device, the heater element comprising: a substrate having electrically conductive tracks for generating heat when an electrical current is applied thereto; and an integral temperature sensor.
24. The heater element according to claim 23, wherein the electrically conductive tracks and the temperature sensor are formed as parallel layers embedded within the substrate.
25. A heater element according to claim 23 or 24, wherein the temperature sensor comprises a resistive track, the resistance of the resistive track varying with temperature.
26. The heater element according to any one of claims 23 to 25, wherein the temperature sensor is molecularly bonded to the substrate.
27. The heater element according to claim 26, wherein the substrate comprises a ceramic material.
28. A method of manufacturing a cartridge for a hair styling device, the method comprising extruding the cartridge so that it comprises an outer surface and an integrally formed heater mounting surface inside the cartridge.
29. The method of claim 28 wherein the heater mounting surface extends across the interior of the cartridge from side to side.
30. The method of claim 29 wherein the heater mounting surface is positioned substantially across a diameter of the barrel.
31. The method of claim 29, wherein the heater mounting surface is located away from a diameter of the barrel.
32. The method of any one of claims 28 to 31, wherein the heater mounting surface has a thickness that is approximately twice a thickness of the outer surface.
33. The method of any one of claims 28 to 32, wherein the heater mounting surface is substantially flat.
34. A method according to any one of claims 28 to 32, wherein the heater mounting surface comprises a longitudinal recess for receiving one or more heater elements.
35. The method of any one of claims 28 to 34, wherein the outer surface has a circular cross-section.
36. The method of any one of claims 28 to 34, wherein the outer surface has an elliptical cross-section.
37. The method of any one of claims 28 to 36, wherein the barrel is formed of metal.
38. A method according to any one of claims 28 to 37, and subsequently mounting one or more heater elements on the heater mounting surface.
39. A method according to claim 38 when dependent on claim 34, wherein the or each heater element is mounted within the longitudinal recess.
40. A method according to claim 38 or 39, further comprising securing the or each heater element against the heater mounting surface.
41. A method of forming a heater element for a hair styling device, the method comprising forming on or in a substrate an electrically conductive track for generating heat when an electrical current is applied thereto, and an integral temperature sensor.
42. The method of claim 41, wherein the conductive tracks and the temperature sensor are formed as parallel layers embedded within the substrate.
43. The method of claim 41 or 42, wherein the temperature sensor comprises a resistive track whose resistance varies with temperature.
44. The method of any one of claims 41 to 43, wherein the temperature sensor is molecularly bonded to the substrate.
45. The method of any one of claims 41 to 44, wherein the substrate comprises a ceramic material.
Technical Field
The present invention relates to a heatable roller body for a hair styling device such as, but not limited to, curling tongs, curling bars, or hot iron brushes; and related components and methods of manufacture.
Background
Some hair styling apparatus (e.g., curling irons, curling bars, and hot irons) include an elongated barrel member and an electric heater element operable to heat the barrel.
In prior hair styling apparatus of this type, the cartridge is typically constructed from a simple cylindrical metal tube. In manufacturing the device, the heater element is mounted within the cartridge by a separate heater carrier. In more detail, the heater element is mounted on or in the heater carrier, and then the heater carrier is fitted within the barrel adjacent to the inner surface of the barrel. Thus, in use, heat transfer from the heater element to the barrel crosses at least two boundaries-firstly, from the heater element to the heater carrier, and secondly, from the heater carrier to the barrel.
For such hair styling devices, it is desirable to increase the speed and efficiency of heat transfer from the surface of the internal heater element to the external surface of the device in order to more quickly and efficiently transfer heat to the hair being styled.
Disclosure of Invention
According to a first aspect of the present invention, there is provided a cartridge for a hair styling device, the cartridge comprising: an outer surface; and a heater mounting surface inside the barrel; wherein the heater mounting surface is integrally formed with the outer surface.
Since the heater mounting surface is integrally formed with the outer surface, this forms an uninterrupted path for heat transfer from the heater element (when mounted on the heater mounting surface) to the outer surface. This, in turn, allows for an increase in the rate and efficiency of heat transfer from the heater element to the outer surface of the device, and thus, the rate and efficiency of styling hair.
Another advantage afforded by forming the heater mounting surface integrally with the outer surface is that the manufacturing process is simplified since a separate heater carrier component is not required.
The heater mounting surface may extend across the interior of the barrel from side to side. For example, the heater mounting surface may be positioned substantially across a diameter of the barrel. Alternatively, the heater mounting surface may be located away from the diameter of the barrel (e.g., to provide more space to accommodate a larger heater element).
Advantageously, the thickness of the heater mounting surface may be about twice the thickness of the outer surface, as this has been found to increase the effectiveness of heat transfer from the heater element to the outer surface.
The heater mounting surface may be substantially flat. Alternatively, it may comprise a longitudinal recess for receiving one or more heater elements, thereby facilitating accurate positioning and retention of the heater elements on the heater mounting surface.
The outer surface may have a circular or elliptical cross-section, or may have other shapes if desired.
Advantageously, the cartridge (with integral heater mounting surface) may be formed as a single extruded component, for example of metal. This greatly facilitates the manufacture of the cartridge, thereby reducing the production cost. Furthermore, this allows the cartridge to be of any desired length, or a range of cartridge lengths to be readily produced.
According to a second aspect of the present invention there is provided a cartridge assembly for a hair styling apparatus, the cartridge assembly comprising a cartridge according to the first aspect of the present invention, and one or more heater elements mounted on a heater mounting surface.
If the heater mounting surface comprises a longitudinal recess, the or each heater element may be mounted within the longitudinal recess.
The cartridge assembly may further comprise means for securing the or each heater element against the heater mounting surface. In one example, the means for securing comprises a spring clip. However, alternative securing means may be used.
According to a third aspect of the present invention, there is provided a hair styling device comprising a cartridge assembly according to the second aspect of the present invention. The hair styling device may be of any type that uses one or more heated barrel components. For example, the hair styling device may be selected from the group comprising: curling tongs, curling bars and hot iron brushes.
For use in a cartridge assembly as described above, or in other hair styling apparatus which does not employ such a cartridge assembly, a fourth aspect of the invention provides a heater element comprising: a substrate (e.g. made of ceramic) having electrically conductive tracks for generating heat when an electrical current is applied thereto (i.e. by joule heating); and an integral temperature sensor.
For example, the conductive tracks and the temperature sensor may be formed as parallel layers embedded within the substrate. The temperature sensor may comprise a resistive track, the resistance of which varies with temperature. Thus, temperature can be sensed over an area (rather than just a single point) and the track can advantageously be molecularly bonded to the heater, thereby eliminating any need for thermal glue (which is difficult to do in manufacturing and heat resistance, if not reducing performance).
According to a fifth aspect of the present invention, there is provided a method of manufacturing a cartridge for a hair styling device, the method comprising extruding the cartridge so that it comprises an outer surface and an integrally formed heater mounting surface inside the cartridge.
Optional features of the method of manufacture are as described above in relation to the first aspect of the invention.
The method may then include mounting one or more heater elements on the heater mounting surface.
The method may further comprise securing the or each heater element against the heater mounting surface.
According to a sixth aspect of the present invention there is provided a method of forming a heater element for a hair styling device, the method comprising forming on or in a substrate electrically conductive tracks for generating heat when an electrical current is applied thereto, and an integral temperature sensor.
The conductive tracks and the temperature sensor may be formed as parallel layers embedded within the substrate.
The temperature sensor may comprise a resistive track, the resistance of which varies with temperature.
The temperature sensor may be molecularly bonded to the substrate.
The substrate may comprise a ceramic material.
Drawings
Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
FIG. 1 is a perspective view of a barrel of a hair styling device having an integral heater mounting surface and a heater element mounted on the heater mounting surface;
FIG. 2 is a cross-sectional view (possible dimensions being given as an example only) of the cartridge of FIG. 1, also with the heater element mounted on the integral heater mounting surface, and also showing a spring clip arranged to hold the heater element in position against the heater mounting surface;
FIG. 3 is an example of a hair styling device, in this case a curling iron, incorporating a heating barrel of the form shown in FIGS. 1 and 2;
FIG. 4 is a schematic cross-sectional view of a heater element with an integral temperature sensor that may be used in the cartridge of the form shown in FIGS. 1 and 2, or in other hair styling devices without such a cartridge;
FIG. 5 is a schematic diagram of a control circuit for use with (and shown connected to) the heater element of FIG. 4;
FIG. 6 is another schematic cross-sectional view, similar to FIG. 4, of a heater element with an integral temperature sensor, with possible dimensions being by way of example only; and
FIG. 7 illustrates in plan view an example of constituent layers that may be used to form a heater element with an integral temperature sensor, such as that shown in FIG. 6.
In the drawings, like elements are denoted by like reference numerals throughout.
Detailed Description
The embodiments of the present invention represent the best modes of practicing the invention by the applicant. However, they are not the only way to achieve this goal.
SUMMARY
Fig. 1 and 2
In the illustrated embodiment, the
Cartridge with integral heater mounting surface
The
When viewed in cross-section, the integral
Whilst in the illustrated embodiment the integral
In manufacture, the
Any suitable metal may be extruded to form the
Heat transfer considerations
The integral
As shown in fig. 2, heat transfer from the one or
In a presently preferred embodiment, increased efficiency can be achieved by making the thickness of the heater mounting surface 16 (e.g., at point a) twice the thickness of the outer exterior surface 14 (e.g., at point C).
With such a geometry, improved thermal performance is achieved because the design and thickness of the integral internal conduction and/or radiation features (i.e., the heater mounting surface 16) provide efficient heat transfer with minimal temperature difference from the
An example of such a geometry is given in fig. 2, where the possible dimensions are provided by way of example only. In this example, the heater mounting surface 16 (which serves as an internal feature for conduction and/or radiation of heat) has a thickness of 2mm (e.g., at point a), while the outer surface 14 (e.g., at point C) has a uniform thickness of 1 mm. Incidentally, it is noted that the
Of course, it should be understood that other geometries are possible in which the
Spring clip (or other fixing device)
In the illustrated embodiment, the spring clips 18 position the
However, as noted above, in alternative embodiments, other means for securing the
Hair styling apparatus examples
Fig. 3 shows an example of a hair styling device, in this
A clamping
Improved heater architecture
In order to improve the thermal response of a hair styling device such as a curling iron as described above, it has been found advantageous not to use a temperature sensor separate from the heater element. Instead, as shown in fig. 4, the temperature sensor may be embedded in the
The resistive track forming the temperature sensor may have a positive or negative temperature coefficient so that as the temperature changes the resistance of the track changes and this resistance can then be detected by the control circuit so that the temperature can be calculated (once the change in track resistance is calibrated for temperature). Further, based on the calculated temperature, the power supplied to the heater track may be controlled to adjust the temperature of the
The use of such an integrated heater and sensor arrangement is in no way limited to hair styling devices as described above (i.e., devices having a
Fig. 5 is a schematic diagram of a control circuit 40 suitable for use with (and shown connected to) the
In use, the control unit 46 causes the current drive unit 42 to supply current to the
A user adjustable control knob or other user interface (e.g., an electronic button) coupled to the control unit 46 may be provided to enable a user to specify the temperature to which the
Fig. 6 shows another heater element with an integrated temperature sensor similar to that of fig. 4, the possible dimensions of which are only examples. In this case, the
Referring to the exemplary dimensions given in fig. 6, the resistive heater track (of layer 26) may be 0.6mm above the lower surface of the heater element 20 (i.e., the surface adjacent to the
Furthermore, both the resistive track of the temperature sensor (of layer 24) and the resistive heater track (of layer 26) may be at least 0.6mm inboard of the outer edge of the
The
Fig. 7 shows an example of such layers, namely a
When considered separately, the heater track layer 26 (lowermost in the cross-section of fig. 6) has its own
Similarly, when considered separately, the
Similarly, when considered separately, the
At one end, the
As shown, the
The
The positions of the
The
In an alternative embodiment, the pads are not through-thickness, but rather specific pads of each
Possible modifications and alternatives
The detailed embodiments and some possible alternatives have been described above. As will be appreciated by those skilled in the art, numerous variations and further alternatives to the above embodiments may be made while still benefiting from the inventions embodied therein. It will therefore be understood that the invention is not limited to the described embodiments but encompasses modifications apparent to those skilled in the art lying within the scope of the claims appended hereto.
For example, in the above-described embodiment, the
In the above embodiment, a single
In the above described embodiment, a
Throughout the description and claims of this specification, the words "comprise" and "contain" and variations of the words, for example "comprising" and "comprises", mean "including but not limited to", and are not intended to (and do not) exclude other elements, integers or steps.
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