阅读说明：本技术 卷发器 (Hair curler ) 是由 冯业 于 2021-10-18 设计创作，主要内容包括：本发明公开一种卷发器,该卷发器包括手柄、安装支架和卷发筒,所述手柄内设有电路板,所述安装支架安装于所述手柄的一端。所述卷发筒包括不锈钢基体和设于所述不锈钢基体上的石墨烯发热体,所述不锈钢基体安装于所述安装支架,所述石墨烯发热体与所述不锈钢基体热传导连接,所述石墨烯发热体呈多段弯折的条状,所述石墨烯发热体的两端电连接所述电路板。本发明技术方案能够提升卷发器的发热效率,提升卷发器升温速度。(The invention discloses a hair curler which comprises a handle, a mounting bracket and a hair roller, wherein a circuit board is arranged in the handle, and the mounting bracket is mounted at one end of the handle. The hair roller comprises a stainless steel substrate and a graphene heating body arranged on the stainless steel substrate, the stainless steel substrate is arranged on the mounting support, the graphene heating body is in heat conduction connection with the stainless steel substrate, the graphene heating body is in a multi-section bent strip shape, and two ends of the graphene heating body are electrically connected with the circuit board. According to the technical scheme, the heating efficiency of the hair curler can be improved, and the heating speed of the hair curler can be increased.)

1. A curling iron, comprising:

the handle is internally provided with a circuit board;

the mounting bracket is mounted at one end of the handle; and

the hair roller comprises a stainless steel substrate and a graphene heating body arranged on the stainless steel substrate, wherein the stainless steel substrate is arranged on the mounting support, the graphene heating body is in heat conduction connection with the stainless steel substrate, the graphene heating body is in a multi-section bent strip shape, and two ends of the graphene heating body are electrically connected with the circuit board.

2. The curling iron of claim 1, wherein said hair roller comprises two separated stainless steel bases, said stainless steel bases are arranged in an arc shape, said two stainless steel bases together enclose to form a cylinder shape, and the inner side of each stainless steel base is provided with said graphene heating element.

3. The curling iron of claim 2, wherein said mounting bracket includes a mounting bracket, a stop collar and a support member, said mounting bracket is mounted to one end of said handle, said support member is connected at one end to said stop collar and at the other end to said mounting bracket, said stainless steel bases are mounted between said mounting bracket and said stop collar, each of said stainless steel bases has two mounting side portions extending along the length of said hair roller, and said two mounting side portions of said stainless steel bases are mounted to said support member.

4. The curling iron of claim 3, wherein said support member comprises two spaced apart connecting bars, one end of said connecting bar being connected to said stop collar and the other end of said connecting bar being connected to said mounting bracket, each of said connecting bars being mounted between two opposite mounting sides of said stainless steel base.

5. The curling iron of claim 4, wherein said connecting bar comprises a bar body, a first protrusion connected to said bar body, and a second protrusion connected to said first protrusion, wherein a limiting slot is formed between said second protrusion and said bar body, said mounting side portion is engaged with said limiting slot, said mounting side portion is provided with a limiting bayonet, and said limiting bayonet is engaged with said first protrusion; and/or the presence of a gas in the gas,

any one installation side part of the stainless steel base body is provided with a first folding edge extending towards the other installation side part and a second folding edge connected to the inner edge of the first folding edge, the second folding edge extends towards the other direction of the stainless steel base body, and the connecting strip is installed at a corner formed by the first folding edge and the second folding edge.

6. The curling iron of claim 1, wherein said mounting bracket comprises a fixing frame, a stop collar and a stop rod, said fixing frame is mounted on one end of said handle, one end of said curling iron is mounted on said fixing frame, the other end of said curling iron is mounted on said stop collar, said stop rod is inserted into said curling iron, one end of said stop rod is connected to said stop collar, and the other end of said stop rod is connected to said fixing frame.

7. The curling iron of claim 1, wherein said graphene heating element comprises at least a connecting segment and a plurality of extension segments, each of said extension segments extends along the length direction of said hair roller, and each of said extension segments is spaced apart in the circumferential direction of the hair roller, and any two adjacent extension segments are connected by one of said connecting segments; and/or the presence of a gas in the gas,

the graphene heating body comprises a connecting section and a plurality of extension sections, each extension section extends along the circumferential direction of the hair roller, the extension sections are distributed at intervals in the length direction of the hair roller, and any two adjacent extension sections are connected through one connecting section.

8. The curling iron of claim 1, wherein said stainless steel base has a first bonding layer sintered to an inner surface thereof, said first bonding layer has a second bonding layer sintered to a surface thereof facing away from said stainless steel base, and said graphene heating element is sintered to a surface of said second bonding layer.

9. The curling iron of claim 1, wherein said stainless steel base has an outer surface coated with an insulating and heat conducting layer; and/or the presence of a gas in the gas,

the inner side of the stainless steel substrate is covered with an insulating and heat-insulating layer, and the insulating and heat-insulating layer covers the graphene heating body.

10. The curling iron of any one of claims 1 to 9, further comprising a temperature sensor electrically connected to said circuit board and in heat-conducting connection with said stainless steel base; and/or the presence of a gas in the gas,

the hair curler further comprises a rechargeable battery and a fixing support, the fixing support is installed in the handle, the inner cavity of the handle is separated to form 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.

Technical Field

The invention relates to the field of hairdressing and shaping tools, in particular to a hair curler.

Background

Hairdressing becomes a fashion mode in which people pursue fashion nowadays, and at present, a hair curler designed for rapidly curling hair becomes an essential tool for personal care. A hair curler, also called a hair curling rod, is a hairdressing tool used for quickly curling and styling hair. The traditional hair curler generally adopts resistance wire heating or PTC heating modes, however, these heating modes have high heat loss, large energy consumption and low heating efficiency, and are difficult to achieve a better hair curling effect, and the user experience effect is poor.

Disclosure of Invention

The invention mainly aims to provide a hair curler, aiming at improving the heating efficiency of the hair curler.

To achieve the above object, the present invention provides a curling iron, comprising:

the handle is internally provided with a circuit board;

the mounting bracket is mounted at one end of the handle; and

the hair roller comprises a stainless steel substrate and a graphene heating body arranged on the stainless steel substrate, wherein the stainless steel substrate is arranged on the mounting support, the graphene heating body is in heat conduction connection with the stainless steel substrate, the graphene heating body is in a multi-section bent strip shape, and two ends of the graphene heating body are electrically connected with the circuit board.

Optionally, the hair roller comprises two stainless steel substrates which are arranged in a split manner, the two stainless steel substrates are arranged in an arc shape, the two stainless steel substrates jointly enclose to form a cylindrical shape, and the graphene heating element is arranged on the inner side of each stainless steel substrate.

Optionally, the mounting bracket includes a fixing frame, a stop collar and a supporting member, the fixing frame is mounted at one end of the handle, one end of the supporting member is connected to the stop collar, the other end of the supporting member is connected to the fixing frame, the stainless steel base body is mounted between the fixing frame and the stop collar, each stainless steel base body has two mounting side portions extending along the length direction of the hair roller, and the two mounting side portions of the stainless steel base body are mounted on the supporting member.

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

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 installation side portion is clamped in the limiting clamping groove, a limiting bayonet is arranged on the installation side portion, and the limiting bayonet is clamped in the first clamping protrusion; and/or the presence of a gas in the gas,

any one installation side part of the stainless steel base body is provided with a first folding edge extending towards the other installation side part and a second folding edge connected to the inner edge of the first folding edge, the second folding edge extends towards the other direction of the stainless steel base body, and the connecting strip is installed at a corner formed by the first folding edge and the second folding edge.

Optionally, the mounting bracket includes a fixing frame, a limiting sleeve and a limiting pull rod, the fixing frame is mounted at one end of the handle, one end of the hair roller is mounted on the fixing frame, the other end of the hair roller is mounted on the limiting sleeve, the limiting pull rod penetrates through the hair roller, one end of the limiting pull rod is connected to the limiting sleeve, and the other end of the limiting pull rod is connected to the fixing frame.

Optionally, the graphene heating element comprises at least a connecting section and a plurality of extension sections, each extension section extends along the length direction of the hair roller, the extension sections are distributed at intervals in the circumferential direction of the hair roller, and any two adjacent extension sections are connected through one connecting section; and/or the presence of a gas in the gas,

the graphene heating body comprises a connecting section and a plurality of extension sections, each extension section extends along the circumferential direction of the hair roller, the extension sections are distributed at intervals in the length direction of the hair roller, and any two adjacent extension sections are connected through one connecting section.

Optionally, a first bonding layer is formed on the inner surface of the stainless steel substrate in a sintering manner, a second bonding layer is formed on the surface of the first bonding layer, which is away from the stainless steel substrate, in a sintering manner, and the graphene heating element is formed on the surface of the second bonding layer in a sintering manner.

Optionally, an insulating heat-conducting layer is coated on the outer surface of the stainless steel substrate; and/or the presence of a gas in the gas,

the inner side of the stainless steel substrate is covered with an insulating and heat-insulating layer, and the insulating and heat-insulating layer covers the graphene heating body.

Optionally, the curling iron further comprises a temperature sensor electrically connected with the circuit board and thermally conductively connected with the stainless steel substrate; and/or the presence of a gas in the gas,

the hair curler further comprises a rechargeable battery and a fixing support, the fixing support is installed in the handle, the inner cavity of the handle is separated to form 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.

According to the technical scheme, the hair curler adopts the graphene heating body as the heating structure, utilizes the superconducting principle of the graphene material, increases the conductivity of the graphene heating body, accelerates the heating speed, can enable the thermal conversion efficiency of the graphene heating body to be higher, can realize quick electrothermal response under low voltage, and has high heating speed. And the graphene heating body doped with the graphene material has uniform heating temperature and has the purposes of protecting and caring hair. Compare in traditional PTC heating mode, so greatly promoted the efficiency of generating heat of curler, promoted stainless steel base member programming rate. Compared with the mode of arranging the graphene heating body to be the whole layer to cover the stainless steel substrate, the mode of arranging the strip with the bent multiple sections is adopted, so that the graphene heating body can be better laid on the stainless steel substrate, the graphene heating body covers the stainless steel substrate in a larger area, the cross-sectional area of the graphene heating body is smaller, the heating speed is favorably improved, materials of the graphene heating body can be reduced, and the cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of one embodiment of a curling iron of the invention;

FIG. 2 is an exploded view of the curling iron of FIG. 1;

FIG. 3 is a schematic structural view of the stainless steel substrate and the graphene heating element in FIG. 2;

FIG. 4 is a cross-sectional view taken along the line X-X in FIG. 3;

FIG. 5 is an enlarged view taken at A in FIG. 4;

FIG. 6 is a cross-sectional view taken along the line Y-Y in FIG. 1;

FIG. 7 is an enlarged view at B in FIG. 6;

FIG. 8 is an enlarged view at C of FIG. 6;

FIG. 9 is a schematic view of the structure of the connecting strip of FIG. 2;

FIG. 10 is a schematic structural view of the stainless steel substrate of FIG. 2;

fig. 11 is an enlarged view at D in fig. 10.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Hair curler	30	Hair curler
10	Handle (CN)	31	Stainless steel substrate
				11	First shell	311	Mounting side part
12	Second shell	312	First folded edge
				20	Mounting bracket	313	Second flange
21	Fixing frame	314	Limiting bayonet
				211	Second slot	32	Graphene heating body
212	First through hole	321	Connecting segment
				22	Spacing sleeve	322	Extension section
221	First slot	33	First connecting layer
				222	Second through hole	34	Second connecting layer
23	Support piece	35	Insulating heat-conducting layer
				230	Connecting strip	36	Insulating and heat-insulating layer
231	Strip body	40	Limit nut
				232	The first clamping projection	50	Fixing support
233	The second clamping projection	60	Rechargeable battery
				234	Limiting clamping groove	70	Control key
24	Limit pull rod	80	Circuit board
				241	Spacing head

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a hair curler.

Referring to fig. 1 to 5, the curling iron 100 includes a handle 10, a mounting bracket 20 and a curling roller 30, wherein a circuit board 80 is disposed in the handle 10, and the mounting bracket 20 is mounted at one end of the handle 10. The hair roller 30 comprises a stainless steel substrate 31 and a graphene heating element 32 arranged on the stainless steel substrate 31, the stainless steel substrate 31 is mounted on the mounting bracket 20, the graphene heating element 32 is in heat conduction connection with the stainless steel substrate 31, the graphene heating element 32 is in a strip shape with multiple sections (at least two sections) being bent, and two ends of the graphene heating element 32 are electrically connected with the circuit board 80.

Specifically, when current is applied to the graphene heating element 32, the graphene heating element 32 can generate heat and conduct the heat to the stainless steel substrate 31, so that the temperature of the stainless steel substrate 31 is increased, and thus, hair wound around the hair roller 30 can be heated to perform a hair curling operation.

The graphene heating element 32 contains graphene, and specifically, in an embodiment, the graphene heating element 32 contains nialr alloy powder (Ni — nickel, Al-aluminum, Cr-chromium), graphene, microcrystalline glass powder, and an organic carrier. During forming, NiAlCr alloy powder, graphene, microcrystalline glass powder and an airborne carrier can be mixed, stirred and ground to obtain doped graphene alloy resistance paste, the doped graphene alloy resistance paste is printed on a stainless steel substrate 31 in a circuit with a certain shape pattern (a strip shape with multiple sections of bending) in a printing mode (positioning grooves with a certain shape pattern can be arranged on the stainless steel substrate 31 or an auxiliary positioning structure is adopted to ensure that the doped graphene alloy resistance paste is printed on the stainless steel substrate 31), and finally the printed sample is placed in a drying oven to be dried. After drying, the sample was taken out and put into a vacuum furnace to be sintered, thereby obtaining a graphene heating element 32 molded on a stainless steel substrate 31.

In another embodiment, the graphene heating element 32 contains NiFe alloy powder (Ni — nickel, Fe — iron), graphene, microcrystalline glass powder, and an organic vehicle. The forming method of the graphene heating element 32 can refer to the above embodiments, and is not described in detail herein.

In another embodiment, the graphene heating element 32 contains NiCu alloy powder (Ni — nickel, Cu — copper, among others), graphene, glass ceramic powder, and an organic vehicle. The forming method of the graphene heating element 32 can refer to the above embodiments, and is not described in detail herein.

In another embodiment, the graphene heating element 32 contains NiB alloy powder (Ni — nickel, B-boron), graphene, microcrystalline glass powder, and an organic vehicle. The forming method of the graphene heating element 32 can refer to the above embodiments, and is not described in detail herein.

In embodiments of the present invention, the organic vehicle may comprise a solvent, a thickener, a thixotropic agent, a surfactant, and a binder. Wherein, the solvent can be one or more of terpineol, diethylene glycol butyl ether acetate and dibutyl phthalate. The thickener can be a conventional material in the industry having a thickening effect, such as ethyl cellulose. The thixotropic agent may be a conventional material in the industry having anti-thixotropic properties, such as hydrogenated castor oil. The surfactant may be a conventional material in the industry having enhanced surface activity, such as oleic acid. The binder may be a conventional material in the industry having enhanced viscosity, such as polyvinyl butyral.

According to the hair curler 100, the graphene heating body 32 is used as a heating structure, the graphene material superconducting principle is utilized, the conductivity of the graphene heating body 32 is increased, the heating speed is increased, the heat conversion efficiency of the graphene heating body 32 is high, quick electric heating response can be realized under low voltage, and the heating speed is high. And the graphene heating body doped with the graphene material has uniform heating temperature and has the purposes of protecting and caring hair. Compared with the traditional PTC heating mode, the heating efficiency of the hair curler 100 is greatly improved, and the heating speed of the stainless steel substrate 31 is increased. Compare in the mode that is whole layer cover in stainless steel matrix 31 with graphite alkene heat-generating body 32 setting, so will set up the strip that is the multistage buckling, can make graphite alkene heat-generating body 32 lay on stainless steel matrix 31 betterly, make graphite alkene heat-generating body 32 cover the regional great while on stainless steel matrix 31, can make graphite alkene heat-generating body 32's cross-sectional area less, be favorable to promoting the heating speed, and can reduce graphite alkene heat-generating body 32's material, reduce cost.

The bending form of the graphene heating element 32 may be various, for example, in an embodiment (not shown in this embodiment), the graphene heating element 32 may be bent in multiple sections in the length direction of the hair roller 30, that is, the graphene heating element 32 includes a connection section and a plurality of (at least two) extension sections, any two adjacent extension sections are connected by the connection section, each extension section extends along the circumferential direction of the hair roller 30, and the extension sections are distributed at intervals in the length direction of the hair roller 30, so that the graphene heating element 32 is distributed on the stainless steel substrate 31 more uniformly, and the heat distribution on the stainless steel substrate 31 is uniform. In another embodiment, the graphene heating element 32 may also be bent in multiple sections in the circumferential direction of the hair roller 30, that is, the graphene heating element 32 includes a connecting section 321 and a plurality of extending sections 322, any two adjacent extending sections 322 are connected by the connecting section 321, each extending section 322 extends along the length direction of the hair roller 30, and the extending sections 322 are distributed at intervals in the circumferential direction of the hair roller 30, so that the graphene heating element 32 is distributed on the stainless steel substrate 31 more uniformly, and the heat distribution on the stainless steel substrate 31 is uniform. In other embodiments, the graphene heating element 32 is spirally disposed, and the like.

In one embodiment, the two 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 facilitates circuit installation and makes the hair curler 100 compact. Of course, in another embodiment, one end of the graphene heating element 32 may be provided at one end of the stainless steel substrate 31, and the other end of the graphene heating element 32 may be provided at the other end of the stainless steel substrate 31.

In one embodiment, the hair roller 30 includes two stainless steel substrates 31 separately arranged, the stainless steel substrates 31 are arranged in an arc shape, the two stainless steel substrates 31 together enclose to form a cylindrical shape, and a graphene heating element 32 is arranged on the inner side of each stainless steel substrate 31. Specifically, the stainless steel substrate 31 is substantially in the shape of a half cylinder, and two stainless steel substrates 31 are substantially joined together to form a cylinder, so that the graphene heating element 32 can be conveniently disposed inside the stainless steel substrate 31, and when the graphene heating element 32 is disposed inside the stainless steel substrate 31, the graphene heating element 32 is disposed inside the hair roller 30, and the graphene heating element 32 can be prevented from being exposed to the outside, and the graphene heating element 32 can be well protected inside. Of course, in other embodiments, the stainless steel substrate 31 may have a half cone shape or the like. In other embodiments, the graphene heating element 32 may be disposed on the outer surface of the stainless steel substrate 31, and in this case, a heat conducting and insulating structure may be disposed on a side of the graphene heating element 32 away from the stainless steel substrate 31.

In addition, in another embodiment, the stainless steel base 31 has a cylindrical shape. That is, the stainless steel base 31 has an overall cylindrical shape, such as a cylinder, a cone, or other rotary cylinder.

Referring to fig. 2 and 6 to 9, in an embodiment, the mounting bracket 20 includes a fixing frame 21, a position-limiting sleeve 22 and a supporting member 23, the fixing frame 21 is mounted at one end of the handle 10, one end of the supporting member 23 is connected to the position-limiting sleeve 22, the other end is connected to the fixing frame 21, the stainless steel bases 31 are mounted between the fixing frame 21 and the position-limiting sleeve 22, each stainless steel base 31 has two mounting side portions 311 extending along the length direction of the hair roller 30, and the mounting side portions 311 of the two stainless steel bases 31 are mounted on the supporting member 23. Specifically, one end of each stainless steel base 31 is mounted on the position-limiting sleeve 22, and the other end is mounted on the fixing frame 21, that is, the stainless steel base 31 is clamped by the position-limiting sleeve 22 and the fixing frame 21 together. The mounting side parts 311 of the two stainless steel bases 31 are arranged in a one-to-one correspondence manner to jointly enclose the hair roller 30, and the supporting member 23 is mounted at the splicing part of the mounting side walls of the two stainless steel bases 31 and used for fixing the mounting side parts 311 of the two stainless steel bases 31. Therefore, the two stainless steel substrates 31 can be stably fixed through the fixing frame 21, the limiting sleeve 22 and the supporting piece 23, and the two stainless steel substrates 31 are ensured to be stably connected. Of course, in other embodiments, the mounting side portions 311 of the two stainless steel bases 31 may be welded to each other.

In an embodiment, the position-limiting sleeve 22 has a first slot 221, the fixing frame 21 has 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 as to prevent the end of the stainless steel substrate 31 from being exposed to the outside.

In one embodiment, the supporting member 23 includes two connecting bars 230 spaced apart from each other, one end of each connecting bar 230 is connected to the position-limiting sleeve 22, and the other end is connected to the fixing frame 21, and each connecting bar 230 is correspondingly installed between two opposite installation side portions 311 of the two stainless steel substrates 31. Specifically, the two connecting bars 230 are separately arranged, which is equivalent to arranging one connecting bar 230 at the splicing position of the two stainless steel bases 31, i.e. the connecting bar 230 can be set to be smaller in size under the condition that the supporting and mounting side part 311 is satisfied, so that the supporting member 23 can be smaller in size, the compactness of the curling iron 100 is improved, and the overall weight of the curling iron 100 is reduced. Of course, in other embodiments, the supporting member 23 may be configured in a plate shape, and one side portion of the supporting member 23 extending along the length direction of the hair roller 30 is disposed at one of the two stainless steel bases 31, and the other side portion of the supporting member 23 extending along the length direction of the hair roller 30 is disposed at the other of the two stainless steel bases 31.

Referring to fig. 2, 9 and 10, in an embodiment, each of the mounting side portions 311 of the stainless steel bases 31 is provided with a first folding edge 312 extending towards the other mounting side portion 311 and a second folding edge 313 connected to an inner edge of the first folding edge 312, the second folding edge 313 extends towards the other stainless steel base 31, and the connecting strip 230 is mounted at a corner formed by the first folding edge 312 and the second folding edge 313. Thus, the edge of the second folded edge 313 (the edge of the stainless steel base 31) is positioned at the inner side, and the condition that the edge of the stainless steel base 31 is exposed to cut hair is avoided. In this way, the outer surface of the connecting bar 230 is flush with the outer surface of the stainless steel base 31, and a step or an excessive gap between the outer surface of the connecting bar 230 and the outer surface of the stainless steel base 31 is avoided.

Referring to fig. 2, 9 and 11, in an embodiment, the connecting bar 230 includes a bar body 231, a first locking protrusion 232 connected to the bar body 231, and a second locking protrusion 233 connected to the first locking protrusion 232, a limiting slot 234 is formed between the second locking protrusion 233 and the bar body 231, the mounting side portion 311 is locked to the limiting slot 234, the mounting side portion 311 is provided with a limiting bayonet 314, and the limiting bayonet 314 is locked to the first locking protrusion 232. Therefore, the relative movement of the stainless steel base body 31 and the connecting bar 230 in the length direction of the hair roller 30 can be limited by the matching of the limiting bayonet 314 and the first clamping protrusion 232, and the movement of the mounting side portion 311 along the inner and outer directions of the hair roller 30 can be limited by the limiting bayonet groove 234 of the mounting side portion 311 clamped between the second clamping protrusion 233 and the bar body 231, so that the connection stability of the mounting side portion 311 is ensured, and the possibility of deformation of the mounting side portion 311 is reduced. In an embodiment, the second folded edge 313 is clamped in the position-limiting clamping groove 234, and the second folded edge 313 is provided with a position-limiting clamping opening 314. Of course, in other embodiments, the mounting side 311 may be fixed to the connection bar 230 (the support 23) by screws.

Referring to fig. 2 and fig. 6 to 8, in an 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 at one end of the handle 10, one end of the hair roller 30 is mounted on the fixing frame 21, the other end of the hair roller is mounted on the limiting sleeve 22, the limiting pull rod 24 is inserted into the hair roller 30, one end of the limiting pull rod 24 is connected to the limiting sleeve 22, and the other end of the limiting pull rod is connected to the fixing frame 21. Specifically, one end of each stainless steel base 31 is mounted on the position-limiting sleeve 22, and the other end is mounted on the fixing frame 21, that is, the stainless steel base 31 is clamped by the position-limiting sleeve 22 and the fixing frame 21 together. 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, the other end of the limiting pull rod is provided with an external thread, the limiting pull rod 24 penetrates through the second through hole 222, the limiting head 241 abuts against the edge part of the second through hole 222, which deviates from the fixing frame 21, and namely the size of the limiting head 241 is larger than the inner diameter of the second through hole 222. The hair curler 100 further comprises a limiting nut 40, the limiting nut 40 is screwed on one end of the limiting pull rod 24, which penetrates out of the first through hole 212, and abuts against the edge part of the first through hole 212, which is far away from the limiting sleeve 22, i.e. the size of the limiting nut 40 is larger than the inner diameter of the first through hole 212. Therefore, the fixing frame 21 and the limiting sleeve 22 are tensioned through the limiting pull rod 24 to clamp the stainless steel base 31 together, so that the stainless steel base 31 can be stably fixed, and the two stainless steel bases 31 are ensured to be stably connected. The structure is simple, the structure of the curling iron 100 can be simplified, and the overall weight of the curling iron 100 can be reduced. Of course, in other embodiments, the mounting bracket 20 may be partially cylindrical, and the stainless steel substrate 31 may be sleeved on the cylindrical portion of the mounting bracket 20. In other embodiments, a screw hole may be provided on the fixing frame 21, and one end of the position-limiting pull rod 24 away from the position-limiting head 241 is screwed into the screw hole. Or both ends of the limiting pull rod 24 are limited by nuts. Or one end of the limit pull rod 24 is integrally injected on the fixed frame 21, and the other end is screwed on the limit sleeve 22, and the like.

Referring to fig. 2 to 5, in an embodiment, a first connection layer 33 is formed by sintering on a surface of the stainless steel substrate 31 away from the other stainless steel substrate 31, a second connection layer 34 is formed by sintering on a surface of the first connection layer 33 away from the stainless steel substrate 31, and the graphene heating element 32 is formed by sintering on a surface of the second connection layer 34. In this embodiment, the first bonding layer 33 contains a first glass, the second bonding layer 34 contains a second glass, and the melting point of the first glass is higher than that of the second glass.

And during molding, mixing, stirring and grinding the organic carrier and the first microcrystalline glass to obtain first connecting slurry. The first bonding medium paste is provided on the surface of the stainless steel substrate 31 (the surface facing away from the other stainless steel substrate 31) in a planar pattern by printing or other means, and finally the printed sample is put into a drying oven for drying. After drying, the sample was taken out and sintered. And mixing, stirring and grinding the organic carrier and the second glass ceramics to obtain second connection slurry. A second bonding paste is applied in a planar pattern to the surface of the first bonding layer 33 (the surface facing away from the stainless steel substrate 31) by printing or other means, and the printed sample is finally dried in a drying oven. After drying, the sample was taken out and sintered to obtain the second bonding layer 34. And then, arranging a circuit of the doped graphene alloy resistance paste in a certain shape pattern (a multi-section bent strip shape) on the second connection layer 34 (printed on the surface of the second connection layer 34 away from the first connection layer 33) in a printing mode or other modes, and finally, putting the printed sample into a drying oven for drying. After drying, the sample was taken out and put into a vacuum furnace to be sintered, thereby obtaining a first connection layer 33, a second connection layer 34 and a graphene heating element 32 molded on the stainless steel substrate 31.

By adopting the 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 heating element 32, the insulating property between the stainless steel substrate 31 and the graphene heating element 32 is improved, the problem of poor thermal expansion coefficient matching among the stainless steel substrate 31, the composite connecting layer (the first connecting layer 33 and the second connecting layer 34) and the graphene heating element 32 is solved, the bonding force among the three is improved, and the thermal shock resistance of the graphene heating element 32 and the safety performance of the hair curler 100 are improved.

In other embodiments, the first connection layer 33 may have a composite layer structure, for example, the first connection layer 33 includes a plurality of layers (at least two layers) stacked together, and the glass melting point of each layer of the first connection layer 33 is gradually decreased in a direction in which the stainless steel substrate 31 is directed toward the graphene heating element 32. The same is true. The second connection layer 34 may be a composite layer structure, for example, the second connection layer 34 includes a multilayer (at least two layers) structure in which the glass melting point is gradually decreased in a direction in which the stainless steel substrate 31 is directed to the graphene heat-generating body 32.

In one embodiment, the outer surface of the stainless steel substrate 31 is coated with an insulating and heat conducting layer 35. That is, the insulating and thermally conductive layer 35 is in contact with the hair during use of the hair curler 100. Through setting up insulating heat-conducting layer 35, can promote the insulating nature between stainless steel base 31 and the user, reduce stainless steel base 31 electric leakage risk, further promote curler 100 safety in utilization.

In an embodiment, an insulating layer 36 is coated on the inner side of the stainless steel substrate 31, and the insulating layer 36 covers the graphene heating element 32. Specifically, the insulating and heat insulating layer 36 covers the graphene heating element 32 on the back surface of the stainless steel substrate 31. So set up, can block the heat of graphite alkene heat-generating body 32 and stainless steel base member 31 radiation in towards hair-curler 30 through insulating layer 36 for the heat that graphite alkene heat-generating body 32 produced can radiate towards the surface of stainless steel base member 31 better, thereby can make full use of the heat heating hair that graphite alkene heat-generating body 32 produced, reduce calorific loss, can promote the efficiency of generating heat of curler 100, promoted stainless steel base member 31 programming rate. But also protects the components within the hair curler 100 from damage at high temperatures.

In one embodiment, crimper 100 further includes a temperature sensor electrically connected to circuit board 80 and in thermally conductive communication with stainless steel substrate 31. Specifically, the temperature sensor is used for detecting the temperature of the stainless steel substrate 31, so that the circuit board 80 can control the heating temperature of the hair curler 100, the stainless steel substrate 31 is at a proper temperature when the hair curler 100 is used, the situation that the temperature of the stainless steel substrate 31 is too high or too low is avoided, and the hair-beautifying and shaping effects are ensured.

Referring to fig. 1 and 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 partitions the inner cavity of the handle 10 into a battery cavity and an electric control cavity, the rechargeable battery 60 is disposed in the battery cavity, and the circuit board 80 is disposed in the electric control cavity. Specifically, the handle 10 includes a first housing 11 and a second housing 12, the second housing 12 is connected to the first housing 11 and encloses to form an accommodating cavity (an inner cavity of the handle 10), the fixing bracket 50 is installed in the accommodating cavity to separate the accommodating cavity into a battery cavity and an electric control cavity, and the fixing bracket 50 is connected to the first housing 11 to clamp the fixing bracket 50 to the first housing 11. The circuit board 80 is fixed to the fixing bracket 50, so that the rechargeable battery 60 and the circuit board 80 can be fixed by the fixing bracket 50 at the same time, which is beneficial to improving the structural compactness in the handle 10, reducing the number of parts and facilitating the installation.

In one embodiment, the curling iron 100 further comprises at least one control button 70, and the control button 70 is disposed on the handle 10 and electrically connected to the circuit board 80. The number of the control keys 70 may be one or more, for example, when only one control key 70 is provided, the control key 70 is a switch key, and when the number of the control keys 70 is multiple, one switch key, one cooling key, one heating key, and the like may be provided.

In one embodiment, the curling iron 100 further comprises a charging interface disposed at an end of the handle 10 facing away from the hair roller 30, the charging interface being electrically connected to the circuit board 80.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.