Hair straightener

Abstract

The utility model discloses a straightening iron, including casing, circuit device and heating plate subassembly, the casing has two clamping plates opposite and openable and closeable, two the side of each other of clamping plate is equipped with heating plate subassembly, heating plate subassembly includes support seat and ceramic plate, support seat is equipped with the mounting groove, ceramic plate installs in mounting groove, and has opposite heat conduction face and perm surface, heat conduction face is equipped with conductive heating coating and the wiring part of two ends of separate distribution in conductive heating coating, wiring part with circuit device electricity is connected. The utility model technical scheme can simplify heating plate subassembly structure, improve the temperature -rising speed and improve the temperature control accuracy.

Description

Technical Field

[0001] This utility model relates to the field of hairdressing equipment, and in particular to a hair straightener. Background Technology

[0002] The heating structure of a traditional hair straightener typically consists of an aluminum plate, a base supporting the aluminum plate, an MCH heating element located inside the aluminum plate, and a spring-loaded structure that presses the MCH heating element onto the aluminum plate. The structure is relatively complex, and the heat source needs to conduct heat through the ceramic outer layer of the MCH heating element and the aluminum plate to the outer surface of the aluminum plate, which affects the heating speed and temperature control accuracy. Utility Model Content

[0003] The main purpose of this invention is to propose a hair straightener that simplifies the structure of the heating plate assembly while improving the heating speed and temperature control accuracy.

[0004] To achieve the above objectives, the present invention proposes a hair straightener comprising a housing, a circuit device, and a heating plate assembly. The housing has two opposing and closable clamps, and the heating plate assembly is provided on one side of each clamp facing each other.

[0005] The heating plate assembly includes a support base and a ceramic plate. The support base is provided with a mounting groove. The ceramic plate is installed in the mounting groove and has opposing heat-conducting surfaces and a perming surface. The heat-conducting surface is provided with a conductive heating coating and wiring portions located at both ends of the conductive heating coating. The wiring portions are electrically connected to the circuit device.

[0006] Optionally, the conductive heating coating has an insulating layer on the side away from the ceramic plate.

[0007] Optionally, the mounting groove is provided through both ends along the length of the support base, the side wall of the mounting groove is provided with a limiting groove, and the long side of the ceramic plate is provided with a limiting part, which is engaged in the limiting groove.

[0008] Optionally, the bottom wall of the mounting groove is provided with a clearance groove, which is provided through both ends along the length of the support base, and the conductive heating coating is located in the clearance groove.

[0009] Optionally, the support base is further provided with a through hole penetrating the bottom wall of the mounting groove, and the wiring part and the conductive heating coating are both provided corresponding to the through hole.

[0010] Optionally, the heating plate assembly further includes a mounting base, on which the support base is mounted on the side opposite to the ceramic plate, and the mounting base is mounted on the clamping plate.

[0011] Optionally, the heating plate assembly further includes a silicone component, a temperature sensor, and a temperature fuse. The silicone component has a mounting portion extending into the through hole. The mounting portion is provided with a receiving groove. The temperature sensor and the temperature fuse are both located in the receiving groove and abut against the conductive heating coating. The side of the silicone component facing away from the ceramic plate abuts against the mounting base.

[0012] Optionally, the mounting part is further provided with two positioning slots, each of which corresponds to one of the two wiring parts. The circuit device includes two conductive elements and wires connected to the conductive elements. The two conductive elements are respectively disposed in the two positioning slots and abut against the corresponding wiring parts.

[0013] Optionally, the support base has two locking parts on the side opposite to the ceramic plate. Both locking parts extend along the length direction of the support base, and the through hole is located between the two locking parts. The two locking parts are locked onto the mounting base.

[0014] Optionally, the hair straightener further includes a step-down module, the output terminal of which is connected to the circuit device, and the output voltage of the step-down module is not greater than 36V.

[0015] Optionally, the step-down module has a step-down switching power supply, and the output terminal of the step-down switching power supply is connected to the circuit device.

[0016] Optionally, the hair straightener further includes a power cord, one end of which is installed in the housing and electrically connected to the circuit device, and the other end is provided with a plug, and the step-down module is located on the power cord.

[0017] The beneficial effects of this invention are as follows: By setting an installation groove in the support base, a ceramic plate is placed in the installation groove, and a conductive heating coating and wiring portions are provided at both ends of the conductive heating coating on the heat-conducting surface of the ceramic plate. Compared with the traditional heating plate structure using MCH + aluminum plate, this simplifies the structure of the heating plate assembly and reduces its thickness. It also shortens the heat conduction path between the heat source (i.e., the conductive heating coating) and the perming surface, while improving the heating speed and temperature control accuracy, resulting in more uniform heating of the perming surface and greater user convenience. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the hair straightener of this utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure of the heating plate assembly;

[0021] Figure 3 for Figure 2 Exploded view of the heating plate assembly;

[0022] Figure 4 for Figure 3 A schematic diagram of the structure of the central support base and the other side of the ceramic plate.

[0023] Explanation of icon numbers:

[0024] 10. Housing; 11. Clamping plate; 20. Heating plate assembly; 21. Support base; 211. Mounting slot; 212. Through hole; 213. Limiting slot; 214. Clearance slot; 215. Snap-fit ​​part; 22. Ceramic plate; 221. Heat-conducting surface; 222. Hair-perming surface; 223. Conductive heating coating; 224. Wiring part; 225. Limiting part; 23. Mounting base; 231. Receiving slot; 24. Silicone part; 241. Mounting part; 242. Receiving slot; 243. Positioning slot; 25. Temperature sensor; 26. Temperature fuse; 30. Conductive part; 40. Step-down module; 50. Power cord; 51. Plug.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text is to include three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] This utility model proposes a hair straightener.

[0030] In the embodiments of this utility model, such as Figures 1 to 4 As shown, the hair straightener includes a housing 10, a circuit device and a heating plate assembly 20. The housing 10 has two opposing and closable clamps 11, and the heating plate assembly 20 is provided on the side of the two clamps 11 facing each other.

[0031] The heating plate assembly 20 includes a support base 21 and a ceramic plate 22. The support base 21 is provided with a mounting groove 211. The ceramic plate 22 is mounted in the mounting groove 211 and has a heat-conducting surface 221 and a hair-perming surface 222. The heat-conducting surface 221 is provided with a conductive heating coating 223 and wiring portions 224 respectively disposed at both ends of the conductive heating coating 223. The wiring portions 224 are electrically connected to the circuit device.

[0032] The heating plate assemblies 20 on the two clamping plates 11 are arranged opposite each other. Specifically, the perming surfaces 222 of the two heating plate assemblies 20 are arranged opposite each other. In use, the two clamping plates 11 are close to each other, and the hair can be clamped by contacting the two perming surfaces 222. The heat generated by the conductive heating coating 223 and conducted to the perming surfaces 222 is used for perming. The ceramic plate 22 can be made of insulating ceramic material, specifically zirconia ceramic, silicon carbide ceramic, silicon nitride, boron nitride, or aluminum nitride. The conductive heating coating 223 can be formed by tungsten paste printing and sintering, or it can be a rare earth metal oxide nano heating coating.

[0033] Optionally, an insulating layer is provided on the side of the conductive heating coating 223 away from the ceramic plate 22 to prevent leakage. Using an insulating layer that directly covers the conductive heating coating 223 simplifies the structure and reduces the space occupied in the heating plate assembly 20. The insulating layer can be a glass glaze insulating layer, a microcrystalline glass insulating layer, or a polymer insulating layer, etc. Of course, in other embodiments, an insulating plate can also be provided to cover the conductive heating coating 223.

[0034] Optionally, the rear ends of the two clamping plates 11 are hinged to each other, the heating plate assembly 20 is located at the front end of the clamping plates 11, and a power cord 50 is provided at the rear end of one of the clamping plates 11, with the circuit device located inside the clamping plate 11 where the power cord 50 is located; the housing 10 also includes a tailstock, and the rear ends of the two clamping plates 11 are hinged to the tailstock; or, the housing 10 also includes a handle, with one clamping plate 11 fixed to the front end of the handle and the other clamping plate 11 hinged to the front end of the handle.

[0035] The circuit device includes a circuit board and a control circuit disposed on the circuit board. The control circuit is connected to two wiring terminals 224. The specific composition of the control circuit can be referred to the prior art, and will not be described in detail here.

[0036] This utility model's technical solution involves setting an mounting groove 211 in the support base 21, placing a ceramic plate 22 in the mounting groove 211, and providing a conductive heating coating 223 and wiring portions 224 at both ends of the conductive heating coating 223 on the heat-conducting surface 221 of the ceramic plate 22. Compared to the traditional heating plate structure using MCH + aluminum plate, this simplifies the structure of the heating plate assembly 20 and reduces its thickness. It also shortens the heat conduction path between the heat source (i.e., the conductive heating coating 223) and the perming surface 222, while improving the heating speed and temperature control accuracy, resulting in more uniform heating of the perming surface 222 and greater user convenience.

[0037] In some embodiments, the mounting groove 211 is provided through both ends along the length of the support base 21. The sidewall of the mounting groove 211 is provided with a limiting groove 213, and the long side of the ceramic plate 22 is provided with a limiting part 225, which is engaged in the limiting groove 213. Specifically, both opposite sidewalls of the mounting groove 211 are provided with limiting grooves 213, and both long sides of the ceramic plate 22 are provided with limiting parts 225. During assembly, the ceramic plate 22 can be inserted into the mounting groove 211 with the limiting parts 225 corresponding to the limiting grooves 213. After installation, only the two ends of the mounting groove 211 need to be sealed and limited to fix the ceramic plate 22 on the support base 21, which can reduce the fastening structure.

[0038] In some embodiments, the bottom wall of the mounting groove 211 is provided with a clearance groove 214, which extends through both ends along the length of the support base 21, and the conductive heating coating 223 is located within the clearance groove 214. Specifically, the depth of the clearance groove 214 is greater than the height of the conductive heating coating 223 relative to the heat-conducting surface 221, so as to avoid interference between the conductive heating coating 223 and the support base 21 during installation.

[0039] In some embodiments, the support base 21 is further provided with a through hole 212 penetrating the bottom wall of the mounting groove 211, and the wiring portion 224 and the conductive heating coating 223 are both provided corresponding to the through hole 212. That is, the wiring portion 224 and the conductive heating coating 223 are exposed from the through hole 212, which facilitates wiring and also makes it convenient to install temperature sensing elements (such as temperature sensor 25 and temperature fuse 26).

[0040] In some embodiments, the heating plate assembly 20 further includes a mounting base 23, on which the support base 21 is mounted with respect to the side opposite to the ceramic plate 22, and the mounting base 23 is mounted on the clamping plate 11. That is, the support base 21 is mounted to the clamping plate 11 via the mounting base 23, which simplifies the structure of the support base 21 and ensures reliable installation between the support base 21 and the ceramic plate 22. Of course, in other embodiments, the support base 21 can also be connected to the clamping plate 11.

[0041] In some embodiments, the heating plate assembly 20 further includes a silicone element 24, a temperature sensor 25, and a temperature fuse 26. The silicone element 24 has a mounting portion 241 extending into the through hole 212. The mounting portion 241 has a receiving groove 242. The temperature sensor 25 and the temperature fuse 26 are both disposed in the receiving groove 242 and abut against the conductive heating coating 223. The side of the silicone element 24 facing away from the ceramic plate 22 abuts against the mounting base 23. This allows the silicone element 24 to fix the position of the temperature sensor 25 and the temperature fuse 26, bringing them close to the conductive heating coating 223. This enables accurate temperature detection, ensuring precise temperature control and safety. Furthermore, by placing the temperature sensor 25 and the temperature fuse 26 in the receiving groove 242, it facilitates the positioning and installation of the temperature sensor 25 and the temperature fuse 26, and also effectively limits their movement, preventing them from shifting during installation.

[0042] In some embodiments, the mounting part 241 is further provided with two positioning grooves 243, which correspond one-to-one with two wiring parts 224. The circuit device includes two conductive elements 30 and wires connected to the conductive elements 30. The two conductive elements 30 are respectively disposed in the two positioning grooves 243 and abut against the corresponding wiring parts 224. The wires are connected to the control circuit. During installation, the conductive elements 30 can be installed in the positioning grooves 243 first, and then the silicone element 24 can be installed in the support base 21, so that the mounting part 241 is inserted into the through hole 212, and the conductive elements 30 are positioned at the corresponding wiring parts 224. After the support base 21 and the mounting base 23 are installed and fixed, the silicone element 24 can be pressed against the mounting base 23, thereby pressing the conductive elements 30 against the wiring parts 224. This can reduce the welding process, facilitate assembly, and improve the production efficiency of the hair straightener. Of course, in other embodiments, the wires can also be welded to the wiring parts 224.

[0043] In some embodiments, the support base 21 has two snap-fit ​​portions 215 on the side opposite to the ceramic plate 22. Both snap-fit ​​portions 215 extend along the length of the support base 21, and a through hole 212 is located between the two snap-fit ​​portions 215. The two snap-fit ​​portions 215 are snapped into the mounting base 23. Specifically, the mounting base 23 has a receiving groove 231, and the two snap-fit ​​portions 215 are snapped into the receiving groove 231. This ensures a stable connection between the support base 21 and the mounting base 23 while facilitating the installation of the support base 21, reducing the number of screws, and improving the production efficiency of the hair straightener.

[0044] In some embodiments, the hair straightener further includes a step-down module 40, the output of which is connected to a circuit device. The output voltage of the step-down module 40 is no greater than 36V. That is, when connected to mains power, the mains power is first reduced in voltage to no greater than 36V, thereby providing the circuit device with an operating voltage of no greater than 36V. This avoids the risk of electric shock and improves the safety of using the hair straightener.

[0045] Optionally, the step-down module 40 has a step-down switching power supply, the output of which is connected to the circuit device. This allows for direct output of a low DC voltage of no more than 36V, reducing the need for rectifier circuitry in the circuit device. Furthermore, it can adapt to a wide AC voltage range of 90V-240V, meeting the voltage standards of different countries / regions and enhancing the portability of the hair straightener.

[0046] In some embodiments, the hair straightener also includes a power cord 50, one end of which is mounted on the housing 10 and electrically connected to the circuit device, and the other end is provided with a plug 51. A step-down module 40 is disposed on the power cord 50. This avoids the situation where the step-down module 40 is placed inside the clamping plate 11, which would result in the clamping plate 11 being too large, making it easier for the user to hold and use the clamping plate 11.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A straightening iron, characterized in that, The straightening iron comprises a housing, a circuit device and a heating plate assembly, the housing has two opposite and openable clamping plates, and each side of the two clamping plates facing each other is provided with the heating plate assembly; The heating plate assembly comprises a support seat and a ceramic plate, the support seat is provided with a mounting groove, the ceramic plate is mounted in the mounting groove and has opposite heat-conducting surfaces and a curling surface, the heat-conducting surfaces are provided with an electrically-conductive heating coating and wire connection parts respectively arranged at both ends of the electrically-conductive heating coating, and the wire connection parts are electrically connected with the circuit device.

2. The straightening iron of claim 1, wherein, The electrically-conductive heating coating is provided with an insulating layer on the side away from the ceramic plate.

3. The straightening iron of claim 1, wherein, The mounting groove is provided through at both ends along the length direction of the support seat, the side wall of the mounting groove is provided with a limiting groove, the long side of the ceramic plate is provided with a limiting part, and the limiting part is clamped in the limiting groove.

4. The straightening iron of claim 3, wherein the heating element is a wire having a diameter of 0.5 mm to 2 mm. The bottom wall of the mounting groove is provided with an avoiding groove, the avoiding groove is provided through at both ends along the length direction of the support seat, and the electrically-conductive heating coating is located in the avoiding groove.

5. The straightening iron of claim 1, wherein, The support seat is further provided with a through hole penetrating through the bottom wall of the mounting groove, and the wire connection parts and the electrically-conductive heating coating are arranged correspondingly to the through hole; The heating plate assembly further comprises a mounting seat, the side of the support seat away from the ceramic plate is mounted in the mounting seat, and the mounting seat is mounted in the clamping plate.

6. The straightening iron of claim 5, wherein, The heating plate assembly further comprises a silica gel piece, a temperature sensor and a temperature fuse, the silica gel piece has a mounting part extending into the through hole, the mounting part is provided with a containing groove, the temperature sensor and the temperature fuse are arranged in the containing groove and abut against the electrically-conductive heating coating, and the side of the silica gel piece away from the ceramic plate abuts against the mounting seat.

7. The straightening iron of claim 6, wherein the heating element is a wire having a diameter of 0.5 mm to 2 mm. The mounting part is further provided with two positioning grooves, the two positioning grooves correspond to the two wire connection parts one by one, the circuit device comprises two electrically-conductive parts and wires connected to the electrically-conductive parts, the two electrically-conductive parts are arranged in the two positioning grooves and abut against the corresponding wire connection parts.

8. The straightening iron of claim 5, wherein, The side of the support seat away from the ceramic plate is provided with two clamping parts, the two clamping parts extend along the length direction of the support seat, the through hole is located between the two clamping parts, and the two clamping parts are clamped in the mounting seat.

9. The straightening iron of claim 1, wherein, The straightening iron further comprises a voltage reduction module, the output end of the voltage reduction module is connected with the circuit device, and the output voltage of the output end of the voltage reduction module is not greater than 36V.

10. The straightening iron of claim 9, wherein, The voltage reduction module has a voltage reduction type switching power supply, and the output end of the voltage reduction type switching power supply is connected with the circuit device. And / or, the straightening iron further comprises a power line, one end of the power line is mounted in the housing and is electrically connected with the circuit device, the other end of the power line is provided with a plug, and the voltage reduction module is arranged on the power line.

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