Curling Iron

Abstract

The present invention discloses a hair curler, which comprises a handle, a mounting bracket and a hair curler, wherein a circuit board is arranged in the handle, and the mounting bracket is mounted on one end of the handle. The hair curler comprises a stainless steel substrate and a graphene heating element arranged on the stainless steel substrate, wherein the stainless steel substrate is mounted on the mounting bracket, and the graphene heating element is connected to the stainless steel substrate by thermal conduction, and the graphene heating element is in the shape of a strip with multiple bending sections, and the two ends of the graphene heating element are electrically connected to the circuit board. The technical solution of the present invention can improve the heating efficiency of the hair curler and improve the heating speed of the hair curler.

Description

Technical Field

[0001] The invention relates to the field of hair styling tools, in particular to a hair curler. Background Art

[0002] Hairdressing has become a way for people to pursue fashion today. At present, curling irons that can quickly curl hair have become an essential tool for personal care. Curling irons, also known as curling rods, are hairdressing tools used to quickly curl hair. Traditional curling irons generally use resistance wire heating or PTC heating. However, these heating methods have high heat loss, high energy consumption, low heating efficiency, and it is difficult to achieve a good curling effect, and the user experience is poor. Summary of the invention

[0003] The main purpose of the present invention is to provide a hair curler, aiming to improve the heating efficiency of the hair curler.

[0004] To achieve the above object, the hair curler provided by the present invention comprises:

[0005] A handle, wherein a circuit board is disposed inside the handle;

[0006] A mounting bracket mounted on one end of the handle; and

[0007] A hair curler comprises a stainless steel substrate and a graphene heating element arranged on the stainless steel substrate. The stainless steel substrate is mounted on the mounting bracket. The graphene heating element is thermally connected to the stainless steel substrate. The graphene heating element is in the shape of a multi-section bent strip. Both ends of the graphene heating element are electrically connected to the circuit board.

[0008] Optionally, the hair curler comprises two separately arranged stainless steel substrates, the stainless steel substrates are arranged in an arc shape, the two stainless steel substrates are together enclosed to form a cylindrical shape, and the graphene heating element is arranged on the inner side of each stainless steel substrate.

[0009] Optionally, the mounting bracket includes a fixing frame, a limiting sleeve and a supporting member, the fixing frame is mounted on one end of the handle, one end of the supporting member is connected to the limiting sleeve, and the other end is connected to the fixing frame, the stainless steel base is mounted between the fixing frame and the limiting sleeve, each of the stainless steel bases has two mounting side portions extending along the length direction of the curling roller, and the mounting side portions of the two stainless steel bases are both mounted on the supporting member.

[0010] Optionally, the support member includes two connecting strips spaced apart from each other, one end of the connecting strip is connected to the limiting sleeve, and the other end is connected to the fixing frame, and each of the connecting strips is correspondingly installed between two opposite installation side portions of the two stainless steel substrates.

[0011] Optionally, the connecting strip comprises a strip body, a first clamping protrusion connected to the strip body, and a second clamping protrusion connected to the first clamping protrusion, a limiting clamping groove is formed between the second clamping protrusion and the strip body, the mounting side portion is clamped in the limiting clamping groove, the mounting side portion is provided with a limiting clamping port, and the limiting clamping port is clamped in the first clamping protrusion; and / or,

[0012] Any mounting side of the stainless steel substrate is provided with a first folded edge extending toward the other mounting side and a second folded edge connected to the inner edge of the first folded edge, the second folded edge extends toward the other stainless steel substrate, and the connecting strip is installed at the corner formed by the first folded edge and the second folded edge.

[0013] Optionally, the mounting bracket includes a fixing frame, a limiting sleeve and a limiting pull rod, the fixing frame is mounted on one end of the handle, one end of the curling roller is mounted on the fixing frame, and the limiting sleeve is mounted on the other end, the limiting pull rod is passed through the curling roller, one end of the limiting pull rod is connected to the limiting sleeve, and the other end is connected to the fixing frame.

[0014] Optionally, the graphene heating element comprises at least a connecting section and a plurality of extending sections, each of the extending sections extends along the length direction of the curling roller, and each of the extending sections is spaced apart in the circumferential direction of the curling roller, and any two adjacent extending sections are connected by one connecting section; and / or,

[0015] The graphene heating element comprises a connecting section and a plurality of extending sections, each of the extending sections extends along the circumferential direction of the curling roller, and each of the extending sections is spaced apart in the length direction of the curling roller, and any two adjacent extending sections are connected by a connecting section.

[0016] Optionally, a first connecting layer is sintered on the inner surface of the stainless steel substrate, a second connecting layer is sintered on the surface of the first connecting layer facing away from the stainless steel substrate, and the graphene heating element is sintered on the surface of the second connecting layer.

[0017] Optionally, the outer surface of the stainless steel substrate is covered with an insulating heat-conducting layer; and / or,

[0018] The inner side of the stainless steel substrate is covered with an insulating heat-insulating layer, and the insulating heat-insulating layer covers the graphene heating element.

[0019] Optionally, the hair curler further comprises a temperature sensor, wherein the temperature sensor is electrically connected to the circuit board and is thermally connected to the stainless steel substrate; and / or,

[0020] The hair curler also includes a rechargeable battery and a fixing bracket. The fixing bracket is installed in the handle and divides the inner cavity of the handle into a battery cavity and an electric control cavity. The rechargeable battery is arranged in the battery cavity, and the circuit board is arranged in the electric control cavity.

[0021] The curling iron of the technical solution of the present invention adopts a graphene heating element as a heating structure, and utilizes the superconducting principle of graphene materials to increase the conductivity of the graphene heating element, accelerate the heating speed, and make the heat conversion efficiency of the graphene heating element higher, and can quickly respond to electric heat at low voltage, and the heating speed is fast. And the heating temperature of the graphene heating element doped with graphene materials is uniform, which has the purpose of protecting and caring for hair. Compared with the traditional PTC heating method, this greatly improves the heating efficiency of the curling iron and improves the heating speed of the stainless steel substrate. Compared with the method of setting the graphene heating element as a whole layer covering the stainless steel substrate, the setting is in a strip shape with multiple sections of bending, so that the graphene heating element can be better laid on the stainless steel substrate, so that the graphene heating element covers a larger area on the stainless steel substrate, and the cross-sectional area of ​​the graphene heating element can be smaller, which is conducive to improving the heating speed, and the material of the graphene heating element can be reduced, reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of an embodiment of a hair curler of the present invention;

[0024] Figure 2 for Figure 1 Exploded view of the medium curling iron;

[0025] Figure 3 for Figure 2 Schematic diagram of the structure of the stainless steel substrate and graphene heating element;

[0026] Figure 4 for Figure 3 Sectional view along the XX axis;

[0027] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0028] Figure 6 for Figure 1 Sectional view along the YY axis;

[0029] Figure 7 for Figure 6 The enlarged view of point B in the middle;

[0030] Figure 8 for Figure 6 Enlarged view of point C in the middle;

[0031] Fig. 9 for Figure 2 A schematic diagram of the structure of the connecting strip;

[0032] Fig.10 for Figure 2 Schematic diagram of the structure of the stainless steel matrix;

[0033] Fig.11 for Fig.10 Enlarged view of point D in the middle.

[0034] Description of Figure Numbers:

[0035] Label name Label name 100 Curling iron 30 Hair curlers 10 handle 31 Stainless steel substrate 11 First shell 311 Install the side 12 Second shell 312 First fold 20 Mounting bracket 313 Second fold 21 Fixed bracket 314 Limit bayonet 211 Second Slot 32 Graphene heating element 212 First through hole 321 Connection segment 22 Limit sleeve 322 Extension 221 First Slot 33 First Link Layer 222 Second through hole 34 Second Link Layer 23 Support 35 Insulation thermal conductive layer 230 Connecting strip 36 Insulation layer 231 Article body 40 Limit nut 232 First card 50 Fixed bracket 233 Second card convex 60 Rechargeable battery 234 Limit slot 70 Control buttons 24 Limit rod 80 Circuit Board 241 Limit head

[0036] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] The invention provides a hair curler.

[0041] In the embodiment of the present invention, please refer to Figures 1 to 5 The hair curler 100 includes a handle 10, a mounting bracket 20 and a hair curler 30. The handle 10 is provided with a circuit board 80. The mounting bracket 20 is mounted on one end of the handle 10. The hair curler 30 includes a stainless steel substrate 31 and a graphene heating element 32 disposed on the stainless steel substrate 31. The stainless steel substrate 31 is mounted on the mounting bracket 20. The graphene heating element 32 is connected to the stainless steel substrate 31 by thermal conduction. The graphene heating element 32 is in the shape of a strip with multiple sections (at least two sections) bent. Both ends of the graphene heating element 32 are electrically connected to the circuit board 80.

[0042] Specifically, when current is passed through the graphene heating element 32, the graphene heating element 32 can generate heat and transfer the heat to the stainless steel substrate 31, so that the stainless steel substrate 31 is heated up, thereby heating the hair wrapped around the curling roller 30 to perform a curling action.

[0043] The graphene heating element 32 contains graphene. Specifically, in one embodiment, the graphene heating element 32 contains NiAlCr alloy powder (Ni-nickel, Al-aluminum, Cr-chromium), graphene, microcrystalline glass powder and organic carrier. During molding, NiAlCr alloy powder, graphene, microcrystalline glass powder and organic carrier can be mixed, stirred and ground to obtain doped graphene alloy resistor slurry, and the doped graphene alloy resistor slurry is printed on the stainless steel substrate 31 in a certain shape pattern (multiple sections of bent strips) by printing (a positioning groove with a certain shape pattern can be set on the stainless steel substrate 31 or an auxiliary positioning structure is used to ensure that the doped graphene alloy resistor slurry is printed on the stainless steel substrate 31), and finally the printed sample is placed in a drying oven for drying. After drying, the sample is taken out and placed in a vacuum furnace for sintering to obtain a graphene heating element 32 formed on the stainless steel substrate 31.

[0044] In another embodiment, the graphene heating element 32 contains NiFe alloy powder (Ni-nickel, Fe-iron), graphene, microcrystalline glass powder and organic carrier. The molding method of the graphene heating element 32 can refer to the above embodiment, which will not be repeated here.

[0045] In another embodiment, the graphene heating element 32 contains NiCu alloy powder (Ni-nickel, Cu-copper), graphene, microcrystalline glass powder and organic carrier. The molding method of the graphene heating element 32 can refer to the above embodiment, which will not be repeated here.

[0046] In another embodiment, the graphene heating element 32 contains NiB alloy powder (Ni-nickel, B-boron), graphene, microcrystalline glass powder and organic carrier. The molding method of the graphene heating element 32 can refer to the above embodiment, which will not be repeated here.

[0047] In an embodiment of the present invention, the organic carrier may include a solvent, a thickener, a thixotropic agent, a surfactant and a binder. Among them, the solvent may be one or more of pineneol, diethylene glycol butyl ether acetate, and dibutyl phthalate. The thickener may be a conventional material with a thickening effect in the industry, such as ethyl cellulose. The thixotropic agent may be a conventional material with anti-thixotropy in the industry, such as hydrogenated castor oil. The surfactant may be a conventional material with improved surface activity in the industry, such as oleic acid. The binder may be a conventional material with improved viscosity in the industry, such as polyvinyl butyral.

[0048] The curling iron 100 of the technical solution of the present invention adopts the graphene heating element 32 as the heating structure, and utilizes the superconducting principle of the graphene material to increase the conductivity of the graphene heating element 32, accelerate the heating speed, and make the thermal conversion efficiency of the graphene heating element 32 higher, and can quickly respond to electric heat at low voltage, and the heating speed is fast. The heating temperature of the graphene heating element doped with graphene material is uniform, which has the purpose of protecting and caring for hair. Compared with the traditional PTC heating method, this greatly improves the heating efficiency of the curling iron 100 and the heating speed of the stainless steel substrate 31. Compared to the method of setting the graphene heater 32 as a whole layer covering the stainless steel substrate 31, setting it in a multi-section bent strip shape can make the graphene heater 32 better laid on the stainless steel substrate 31, so that the graphene heater 32 covers a larger area on the stainless steel substrate 31, and the cross-sectional area of ​​the graphene heater 32 can be made smaller, which is beneficial to improve the heating speed, and can also reduce the material of the graphene heater 32 and reduce the cost.

[0049] Among them, the bending form of the graphene heating element 32 can be various. For example, in one embodiment (this embodiment is not shown in the figure), the graphene heating element 32 can be bent in multiple sections in the length direction of the curling roller 30, that is, the graphene heating element 32 includes a connecting section and multiple (at least two) extension sections, and any two adjacent extension sections are connected by a connecting section. Each extension section extends along the circumferential direction of the curling roller 30, and each extension section is spaced apart in the length direction of the curling roller 30. In this way, the graphene heating element 32 can be distributed more evenly on the stainless steel substrate 31, so that the heat distribution on the stainless steel substrate 31 is uniform. In another embodiment, the graphene heating element 32 can also be arranged in multiple sections in the circumferential direction of the curling roller 30, that is, the graphene heating element 32 includes a connecting section 321 and multiple extension sections 322, any two adjacent extension sections 322 are connected by the connecting section 321, each extension section 322 extends along the length direction of the curling roller 30, and each extension section 322 is spaced apart in the circumferential direction of the curling roller 30, so that the graphene heating element 32 can be distributed more evenly on the stainless steel substrate 31, so that the heat distribution on the stainless steel substrate 31 is even. In other embodiments, the graphene heating element 32 is arranged in a spiral shape, etc.

[0050] In one embodiment, both ends of the graphene heating element 32 are located at the same end of the stainless steel substrate 31, that is, the two terminals of the graphene heating element 32 are located at the same end of the stainless steel substrate 31, which is convenient for circuit installation and makes the structure of the curling iron 100 compact. Of course, in other embodiments, one end of the graphene heating element 32 can also be arranged at one end of the stainless steel substrate 31, and the other end of the graphene heating element 32 can be arranged at the other end of the stainless steel substrate 31.

[0051] In one embodiment, the hair roller 30 includes two stainless steel substrates 31 that are separately arranged. The stainless steel substrates 31 are arranged in an arc shape. The two stainless steel substrates 31 are enclosed together to form a cylindrical shape. The inner side of each stainless steel substrate 31 is provided with a graphene heating element 32. Specifically, the stainless steel substrate 31 is roughly semi-cylindrical, and the two stainless steel substrates 31 are roughly assembled to form a cylindrical shape, so that it is convenient to arrange the graphene heating element 32 on the inner side of the stainless steel substrate 31. When the graphene heating element 32 is arranged on the inner side of the stainless steel substrate 31, it is equivalent to arranging the graphene heating element 32 inside the hair roller 30, which can prevent the graphene heating element 32 from being exposed outside and can better protect the graphene heating element 32 inside. Of course, in other embodiments, the stainless steel substrate 31 can also be semi-conical, etc. In addition, in other embodiments, the graphene heating element 32 may also be disposed on the outer surface of the stainless steel substrate 31 . In this case, a heat-conducting insulating structure may be disposed on the side of the graphene heating element 32 away from the stainless steel substrate 31 .

[0052] In addition, in another embodiment, the stainless steel substrate 31 is cylindrical, that is, the stainless steel substrate 31 is cylindrical as a whole, such as a round cylinder, a conical cylinder or other rotating cylinders.

[0053] Please refer to Figure 2 and Figures 6 to 9 In one embodiment, the mounting bracket 20 includes a fixing frame 21, a limiting sleeve 22 and a supporting member 23. The fixing frame 21 is mounted on one end of the handle 10. One end of the supporting member 23 is connected to the limiting sleeve 22, and the other end is connected to the fixing frame 21. The stainless steel substrate 31 is mounted between the fixing frame 21 and the limiting sleeve 22. Each stainless steel substrate 31 has two mounting side portions 311 extending along the length direction of the hair curler 30. The mounting side portions 311 of the two stainless steel substrates 31 are mounted on the supporting member 23. Specifically, one end of each stainless steel substrate 31 is mounted on the limiting sleeve 22, and the other end is mounted on the fixing frame 21, that is, the stainless steel substrate 31 is clamped by the limiting sleeve 22 and the fixing frame 21. The mounting side portions 311 of the two stainless steel substrates 31 are arranged one by one to enclose and form the hair curler 30. The supporting member 23 is mounted at the joint of the mounting side walls of the two stainless steel substrates 31, and is used for fixing the mounting side portions 311 of the two stainless steel substrates 31. In this way, the two stainless steel substrates 31 can be stably fixed by the fixing frame 21, the limiting sleeve 22 and the supporting member 23, ensuring the stable connection of the two stainless steel substrates 31. Of course, in other embodiments, the mounting side portions 311 of the two stainless steel substrates 31 can also be welded to each other.

[0054] In one embodiment, the limiting sleeve 22 is provided with a first slot 221, the fixing frame 21 is provided with a second slot 211, one end of the stainless steel substrate 31 is inserted into the first slot 221, and the other end is inserted into the second slot 211, so that the end of the stainless steel substrate 31 can be prevented from being exposed.

[0055] In one embodiment, the support member 23 includes two connecting strips 230 spaced apart from each other, one end of the connecting strips 230 is connected to the limiting sleeve 22, and the other end is connected to the fixing frame 21, and each connecting strip 230 is correspondingly installed between two opposite mounting side portions 311 of the two stainless steel substrates 31. Specifically, the two connecting strips 230 are separately provided, which is equivalent to only providing one connecting strip 230 at the joint of the two stainless steel substrates 31, that is, when the supporting mounting side portions 311 are satisfied, the size of the connecting strip 230 can be set smaller, so that the size of the support member 23 can be smaller, the compactness of the structure of the curling iron 100 is improved, and the overall weight of the curling iron 100 is reduced. Of course, in other embodiments, the support member 23 can also be provided in a plate shape, one side portion of the support member 23 extending along the length direction of the curling barrel 30 is provided at one of the joints of the two stainless steel substrates 31, and the other side portion of the support member 23 extending along the length direction of the curling barrel 30 is provided at the other joint of the two stainless steel substrates 31.

[0056] Please refer to Figure 2 , Fig. 9 and Fig.10 In one embodiment, any mounting side portion 311 of the stainless steel substrate 31 is provided with a first folded edge 312 extending toward the other mounting side portion 311 and a second folded edge 313 connected to the inner edge of the first folded edge 312, the second folded edge 313 extending toward the other stainless steel substrate 31, and the connecting strip 230 is installed at the corner formed by the first folded edge 312 and the second folded edge 313. In this way, the edge of the second folded edge 313 (the edge of the stainless steel substrate 31) can be located on the inner side, avoiding the situation where the edge of the stainless steel substrate 31 is exposed to the outside and cuts the hair. In this way, the outer surface of the connecting strip 230 can be flush with the outer surface of the stainless steel substrate 31, avoiding the situation where a step or too large gap is generated between the outer surface of the connecting strip 230 and the outer surface of the stainless steel substrate 31.

[0057] Please refer to Figure 2 , Fig. 9 and Fig.11 In one embodiment, the connecting strip 230 includes a strip body 231, a first clamping protrusion 232 connected to the strip body 231, and a second clamping protrusion 233 connected to the first clamping protrusion 232. A limiting clamping groove 234 is formed between the second clamping protrusion 233 and the strip body 231. The mounting side portion 311 is clamped in the limiting clamping groove 234. The mounting side portion 311 is provided with a limiting clamping hole 314, and the limiting clamping hole 314 is clamped in the first clamping protrusion 232. In this way, the relative movement of the stainless steel base 31 and the connecting strip 230 in the length direction of the hair roller 30 can be limited by the cooperation between the limiting clamping hole 314 and the first clamping protrusion 232. By clamping the mounting side portion 311 in the limiting clamping groove 234 between the second clamping protrusion 233 and the strip body 231, the mounting side portion 311 can be limited to move in the inner and outer directions of the hair roller 30, thereby ensuring the connection stability of the mounting side portion 311 and reducing the possibility of deformation of the mounting side portion 311. In one embodiment, the second folded edge 313 is clamped in the limiting clamping groove 234, and the second folded edge 313 is provided with a limiting clamping opening 314. Of course, in other embodiments, the mounting side portion 311 can also be fixed to the connecting bar 230 (support member 23) by screws.

[0058] Please refer to Figure 2 as well as Figures 6 to 8In one embodiment, the mounting bracket 20 includes a fixing frame 21, a limiting sleeve 22 and a limiting pull rod 24. The fixing frame 21 is mounted on one end of the handle 10. One end of the curling roller 30 is mounted on the fixing frame 21, and the limiting sleeve 22 is mounted on the other end. The limiting pull rod 24 is inserted into the curling roller 30, and one end of the limiting pull rod 24 is connected to the limiting sleeve 22, and the other end is connected to the fixing frame 21. Specifically, one end of each stainless steel substrate 31 is mounted on the limiting sleeve 22, and the other end is mounted on the fixing frame 21, that is, the stainless steel substrate 31 is clamped by the limiting sleeve 22 and the fixing frame 21. The fixing frame 21 is provided with a first through hole 212, the limiting sleeve 22 is provided with a second through hole 222, one end of the limiting pull rod 24 is provided with a limiting head 241, and the other end is provided with an external thread, the limiting pull rod 24 is passed through the second through hole 222, and the limiting head 241 abuts against the edge of the second through hole 222 away from the fixing frame 21, that is, the size of the limiting head 241 is larger than the inner diameter of the second through hole 222. The hair curler 100 also includes a limiting nut 40, which is screwed to the end of the limiting pull rod 24 passing through the first through hole 212 and abuts against the edge of the first through hole 212 away from the limiting sleeve 22, that is, the size of the limiting nut 40 is larger than the inner diameter of the first through hole 212. In this way, the fixing frame 21 and the limiting sleeve 22 are tightened by the limiting pull rod 24 to jointly clamp the stainless steel substrate 31, so that the stainless steel substrate 31 can be stably fixed, and the two stainless steel substrates 31 are ensured to be stably connected. Moreover, the structure is simple, which can simplify the structure of the curling iron 100 and reduce the overall weight of the curling iron 100. Of course, in other embodiments, the mounting bracket 20 may be partially cylindrical, and the stainless steel base 31 may be sleeved on the cylindrical portion of the mounting bracket 20. In addition, in other embodiments, a screw hole may be provided on the fixing frame 21, and one end of the limiting pull rod 24 away from the limiting head 241 may be screwed to the screw hole. Alternatively, both ends of the limiting pull rod 24 may be limited by nuts. Alternatively, one end of the limiting pull rod 24 may be integrally injection molded on the fixing frame 21, and the other end may be screwed to the limiting sleeve 22, and so on.

[0059] Please refer to Figures 2 to 5 In one embodiment, a first connecting layer 33 is sintered on a surface of a stainless steel substrate 31 facing away from another stainless steel substrate 31, a second connecting layer 34 is sintered on a surface of the first connecting layer 33 facing away from the stainless steel substrate 31, and the graphene heating element 32 is sintered on the surface of the second connecting layer 34. In this embodiment, the first connecting layer 33 contains a first glass, and the second connecting layer 34 contains a second glass, and the melting point of the first glass is higher than the melting point of the second glass.

[0060] During molding, the organic carrier is mixed, stirred and ground with the first microcrystalline glass to obtain the first connecting slurry. The first connecting medium slurry is arranged on the surface of the stainless steel substrate 31 (the surface facing away from the other stainless steel substrate 31) in a plane pattern by printing or other means, and finally the printed sample is placed in a drying oven for drying. After drying, the sample is taken out for sintering. The organic carrier is mixed, stirred and ground with the second microcrystalline glass to obtain the second connecting slurry. The second connecting slurry is arranged on the surface of the above-mentioned first connecting layer 33 (the surface facing away from the stainless steel substrate 31) in a plane pattern by printing or other means, and finally the printed sample is placed in a drying oven for drying. After drying, the sample is taken out for sintering to obtain the second connecting layer 34. Then, the circuit of the doped graphene alloy resistor slurry is arranged on the second connecting layer 34 in a certain shape pattern (multi-section bent strips) by printing or other means (printed on the surface of the second connecting layer 34 facing away from the first connecting layer 33), and finally the printed sample is placed in a drying oven for drying. After drying, the sample is taken out and placed in a vacuum furnace for sintering to obtain a first connecting layer 33 , a second connecting layer 34 and a graphene heating element 32 formed on the stainless steel substrate 31 .

[0061] By using microcrystalline glass with different gradient melting points as the composite connecting layer (the first connecting layer 33 and the second connecting layer 34) between the stainless steel substrate 31 and the graphene heater 32, the insulation performance between the stainless steel substrate 31 and the graphene heater 32 is increased, the problem of poor matching of thermal expansion coefficients among the stainless steel substrate 31, the composite connecting layer (the first connecting layer 33 and the second connecting layer 34) and the graphene heater 32 is reduced, the bonding strength among the three is improved, and at the same time, the heat shock resistance of the graphene heater 32 and the safety performance of the curling iron 100 are improved.

[0062] It should be noted that, in other embodiments, the first connecting layer 33 may be a composite layer structure, for example, the first connecting layer 33 includes a stacked multi-layer (at least two-layer) structure, and the glass melting point in each layer structure of the first connecting layer 33 is gradually reduced in the direction from the stainless steel substrate 31 to the graphene heating element 32. Similarly. The second connecting layer 34 may be a composite layer structure, for example, the second connecting layer 34 includes a stacked multi-layer (at least two-layer) structure, and the glass melting point in each layer structure of the second connecting layer 34 is gradually reduced in the direction from the stainless steel substrate 31 to the graphene heating element 32.

[0063] In one embodiment, the outer surface of the stainless steel substrate 31 is covered with an insulating heat-conducting layer 35. That is, when the hair curler 100 is used, the insulating heat-conducting layer 35 is in contact with the hair. By providing the insulating heat-conducting layer 35, the insulation between the stainless steel substrate 31 and the user can be improved, the risk of electric leakage of the stainless steel substrate 31 can be reduced, and the safety of the hair curler 100 can be further improved.

[0064] In one embodiment, the inner side of the stainless steel substrate 31 is covered with an insulating heat-insulating layer 36, and the insulating heat-insulating layer 36 covers the graphene heating element 32. Specifically, the insulating heat-insulating layer 36 covers the graphene heating element 32 on the back of the stainless steel substrate 31. In this way, the insulating heat-insulating layer 36 can block the heat radiated from the graphene heating element 32 and the stainless steel substrate 31 into the curling roller 30, so that the heat generated by the graphene heating element 32 can be better radiated toward the outer surface of the stainless steel substrate 31, so that the heat generated by the graphene heating element 32 can be fully utilized to heat the hair, reduce heat loss, improve the heating efficiency of the curling iron 100, and improve the heating speed of the stainless steel substrate 31. It can also protect the components inside the curling iron 100 and avoid damage at high temperatures.

[0065] In one embodiment, the curling iron 100 further includes a temperature sensor, which is electrically connected to the circuit board 80 and thermally connected to the stainless steel substrate 31. Specifically, the temperature sensor is used to detect the temperature of the stainless steel substrate 31, so that the circuit board 80 can control the heating temperature of the curling iron 100, ensure that the stainless steel substrate 31 is at a suitable temperature when the curling iron 100 is used, avoid the situation where the temperature of the stainless steel substrate 31 is too high or too low, and ensure the hair styling effect.

[0066] Please refer to Figure 1 and Figure 2 In one embodiment, the curling iron 100 further includes a rechargeable battery 60 and a fixing bracket 50. The fixing bracket 50 is installed in the handle 10 and divides the inner cavity of the handle 10 into a battery cavity and an electric control cavity. The rechargeable battery 60 is arranged in the battery cavity, and the circuit board 80 is arranged in the electric control cavity. Specifically, the handle 10 includes a first shell 11 and a second shell 12. The second shell 12 and the first shell 11 are connected to form a receiving cavity (the inner cavity of the handle 10). The fixing bracket 50 is installed in the receiving cavity to divide the receiving cavity into a battery cavity and an electric control cavity. The fixing bracket 50 is connected to the first shell 11 to clamp the fixing bracket 50 in the first shell 11. The circuit board 80 is fixed to the fixing bracket 50. In this way, the rechargeable battery 60 and the circuit board 80 can be fixed at the same time by the fixing bracket 50, which is conducive to improving the compactness of the structure in the handle 10, and can also reduce the number of components and facilitate installation.

[0067] In one embodiment, the hair curler 100 further includes at least one control button 70, which is disposed on the handle 10 and electrically connected to the circuit board 80. The number of the control buttons 70 may be one or more. For example, when only one control button 70 is provided, the control button 70 is a switch button. When there are multiple control buttons 70, a switch button, a temperature reduction button, and a temperature increase button may be provided.

[0068] In one embodiment, the hair curler 100 further includes a charging interface, which is disposed at the end of the handle 10 away from the hair curler 30 , and is electrically connected to the circuit board 80 .

[0069] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A hair curler, characterized in that: include: A handle, wherein a circuit board is disposed inside the handle; A mounting bracket mounted on one end of the handle; as well as A hair curler, comprising a stainless steel substrate and a graphene heating element arranged on the stainless steel substrate, wherein the stainless steel substrate is mounted on the mounting bracket, the graphene heating element is thermally connected to the stainless steel substrate, the graphene heating element is in the shape of a multi-section bent strip, and both ends of the graphene heating element are electrically connected to the circuit board; The hair curler further comprises at least one control button, which is arranged on the handle and electrically connected to the circuit board; The mounting bracket comprises a fixing frame, a limiting sleeve and a supporting member, wherein the fixing frame is mounted on one end of the handle, one end of the supporting member is connected to the limiting sleeve, and the other end is connected to the fixing frame, and the stainless steel substrate is mounted between the fixing frame and the limiting sleeve, and each of the stainless steel substrates has two mounting side portions extending along the length direction of the hair curler, and the mounting side portions of the two stainless steel substrates are both mounted on the supporting member; The support member comprises two connecting strips spaced apart from each other, one end of the connecting strip is connected to the limiting sleeve, and the other end is connected to the fixing frame, and each of the connecting strips is correspondingly installed between two opposite installation side portions of the two stainless steel substrates; The mounting bracket includes a limiting pull rod, the fixing frame is mounted on one end of the handle, one end of the curling roller is mounted on the fixing frame, and the other end is mounted with the limiting sleeve, the limiting pull rod is passed through the curling roller, one end of the limiting pull rod is connected to the limiting sleeve, and the other end is connected to the fixing frame; The connecting strip comprises a strip body, a first latching protrusion connected to the strip body and a second latching protrusion connected to the first latching protrusion, a limiting latch groove is formed between the second latching protrusion and the strip body, the mounting side portion is latched in the limiting latch groove, the mounting side portion is provided with a limiting latch socket, and the limiting latch socket is latched in the first latch socket; and / or, any mounting side portion of the stainless steel substrate is provided with a first folded edge extending toward the other mounting side portion and a second folded edge connected to the inner edge of the first folded edge, the second folded edge extends toward the direction of the other stainless steel substrate, and the connecting strip is installed at the corner formed by the first folded edge and the second folded edge.

2. The hair curler according to claim 1, characterized in that The hair curler comprises two separately arranged stainless steel substrates, the stainless steel substrates are arranged in an arc shape, the two stainless steel substrates are together enclosed to form a cylindrical shape, and the graphene heating element is arranged on the inner side of each stainless steel substrate.

3. The hair curler according to claim 1, characterized in that The graphene heating element comprises at least a connecting section and a plurality of extending sections, each of the extending sections extends along the length direction of the curling roller, and each of the extending sections is spaced apart in the circumferential direction of the curling roller, and any two adjacent extending sections are connected by one connecting section; and / or, The graphene heating element comprises a connecting section and a plurality of extending sections, each of the extending sections extends along the circumferential direction of the curling roller, and each of the extending sections is spaced apart in the length direction of the curling roller, and any two adjacent extending sections are connected by a connecting section.

4. The hair curler according to claim 1, characterized in that A first connecting layer is sintered on the inner surface of the stainless steel substrate, a second connecting layer is sintered on the surface of the first connecting layer away from the stainless steel substrate, and the graphene heating element is sintered on the surface of the second connecting layer.

5. The hair curler according to claim 1, characterized in that The outer surface of the stainless steel substrate is covered with an insulating heat-conducting layer; and / or, The inner side of the stainless steel substrate is covered with an insulating heat-insulating layer, and the insulating heat-insulating layer covers the graphene heating element.

6. A hair curler according to any one of claims 1 to 5, characterized in that The hair curler further comprises a temperature sensor, wherein the temperature sensor is electrically connected to the circuit board and is thermally connected to the stainless steel substrate; and / or, The hair curler also includes a rechargeable battery and a fixing bracket. The fixing bracket is installed in the handle and separates the inner cavity of the handle into a battery cavity and an electric control cavity. The rechargeable battery is arranged in the battery cavity, and the circuit board is arranged in the electric control cavity.

Images