Heating plate assembly and hair straightener

Abstract

The utility model discloses a heating plate assembly and a hair straightener, the heating plate assembly comprises a mounting plate, a ceramic heat conduction plate and a heating body, one side of the mounting plate is provided with a mounting groove, and the groove bottom wall of the mounting groove is provided with a through hole; the ceramic heat-conducting plate is provided with a heat-conducting surface and a perming surface which are deviated from each other, the ceramic heat-conducting plate is mounted in the mounting groove, the heat-conducting surface covers the through hole, and the perming surface is located outside the mounting groove; and the heating body is arranged in the through hole and is in heat conduction connection with the heat conduction surface. According to the technical scheme, the temperature rising speed can be increased.

Description

Technical Field

[0001] This utility model relates to the field of hair styling tools, and in particular to a heating plate assembly and a hair straightener. Background Technology

[0002] Traditional hair straighteners typically place the heating element inside an aluminum plate, which then contacts the hair. Some straighteners, however, use a ceramic plate covering the aluminum plate, utilizing its high abrasion resistance to prevent damage from scratches on the aluminum plate. However, in actual use, the heating element conducts heat to the aluminum plate, and then through the aluminum plate to the ceramic plate, resulting in significant heat loss and low thermal conductivity, thus affecting the heating speed. Utility Model Content

[0003] The main objective of this invention is to provide a heating plate assembly designed to improve the heating rate.

[0004] To achieve the above objectives, the heating plate assembly proposed in this utility model includes:

[0005] The mounting plate has a mounting groove on one side, and a through hole is provided on the bottom wall of the mounting groove.

[0006] A ceramic heat-conducting plate has a heat-conducting surface and a perforating surface that are opposite to each other. The ceramic heat-conducting plate is installed in the mounting groove, the heat-conducting surface covers the through hole, and the perforating surface is located outside the mounting groove; and

[0007] The heating element is installed inside the through hole and is thermally connected to the heat-conducting surface.

[0008] Optionally, the mounting plate has two protruding ribs on the side opposite to the ceramic heat-conducting plate. The two protruding ribs are respectively located on opposite sides of the through hole and extend along the length direction of the mounting plate.

[0009] Optionally, each of the ribs is provided with a limiting portion extending toward another rib, the limiting portion being spaced apart from the mounting plate, and the heating plate assembly further includes an elastic support frame abutting between the heating element and the limiting portion.

[0010] Optionally, the heating element is a ceramic heating element, and a metal plate is provided between the heating element and the elastic support frame.

[0011] Optionally, the elastic support frame includes a compression spring, which is arranged in multiple bends and abuts against the limiting portion and the metal plate.

[0012] Optionally, the metal plate has a clearance groove on the side facing the heating element, and the heating plate assembly also includes a temperature fuse, which is disposed in the clearance groove and abuts against the heating element.

[0013] Optionally, the side of the mounting plate extending along the length direction is spaced apart from the rib, and each rib has an assembly part on the side opposite to the other rib.

[0014] Optionally, the heating plate assembly further includes a mounting base that covers the side of the mounting plate opposite to the ceramic heat-conducting plate and is connected to the rib.

[0015] Optionally, the distance between the heating element and the inner wall of the through hole is not less than 0.2 mm and not more than 1 mm.

[0016] Optionally, each of the two opposite sidewalls of the mounting groove is provided with a limiting groove. The limiting groove extends along the length of the mounting plate and is through at both ends. The opposite sides of the ceramic heat-conducting plate are respectively provided with a snap-fit ​​part, which snaps into the limiting groove.

[0017] This utility model also proposes a hair straightener, including the heating plate assembly as described above.

[0018] The beneficial effects of this invention are as follows: By providing a mounting groove on one side of the mounting plate, with a through hole in the bottom wall of the groove, a ceramic heat-conducting plate is installed in the mounting groove, and the heating element is installed in the through hole, allowing the heating element to be thermally connected to the heat-conducting surface of the ceramic heat-conducting plate. This allows the heat from the heating element to be directly conducted to the ceramic heat-conducting plate, reducing the need for conduction through the intermediate metal plate, thus minimizing heat loss, effectively improving heat conduction efficiency and heating speed, reducing user waiting time after power-on, and facilitating user operation. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the heating plate assembly of this utility model;

[0021] Figure 2 for Figure 1 Exploded view of the middle heating plate assembly;

[0022] Figure 3 for Figure 1 A schematic diagram of the structure of the middle heating plate assembly after the mounting bracket has been removed;

[0023] Figure 4 for Figure 3 A schematic diagram of the structure of the heating element, metal plate, and thermal fuse;

[0024] Figure 5 for Figure 3 Schematic diagram of the mounting plate in the middle;

[0025] Figure 6 This is a schematic diagram of the structure of one embodiment of the hair straightener of this utility model.

[0026] Explanation of icon numbers:

[0027] 100. Heating plate assembly; 10. Mounting plate; 11. Mounting groove; 111. Limiting groove; 12. Through hole; 13. Rib; 131. Limiting part; 132. Assembly part; 20. Ceramic heat-conducting plate; 21. Perming surface; 22. Heat-conducting surface; 23. Snap-fit ​​part; 30. Heating element; 40. Elastic support frame; 41. Compression spring; 411. Elastic section; 412. Limiting section; 42. Spring; 50. Mounting base; 61. Temperature fuse; 62. Temperature sensor; 70. Metal plate; 71. Clearance groove; 80. Clamping arm.

[0028] 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

[0029] 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.

[0030] 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.

[0031] 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.

[0032] This invention proposes a heating plate assembly for use in a hair straightener.

[0033] In the embodiments of this utility model, such as Figures 1 to 6 As shown, the heating plate assembly 100 includes a mounting plate 10, a ceramic heat-conducting plate 20, and a heating element 30. The mounting plate 10 has a mounting groove 11 on one side, and a through hole 12 is provided on the bottom wall of the mounting groove 11. The ceramic heat-conducting plate 20 has a heat-conducting surface 22 and a perming surface 21 (the perming surface 21 is the surface that comes into contact with the hair during use) that are opposite to each other. The ceramic heat-conducting plate 20 is installed in the mounting groove 11, the heat-conducting surface 22 covers the through hole 12, and the perming surface 21 is located outside the mounting groove 11. The heating element 30 is installed in the through hole 12 and is thermally connected to the heat-conducting surface 22.

[0034] Optionally, the perming surface 21 is higher than the edge of the mounting groove 11; or the perming surface 21 is flush with the edge of the mounting groove 11. Of course, in other embodiments, the perming surface 21 may also be slightly lower than the edge of the mounting groove 11.

[0035] Mounting plate 10 can be made of metal, such as aluminum alloy or stainless steel. Heating element 30 can be an MCH ceramic heating element, a PTC ceramic heating element, or a heating film, etc. To improve heat conduction, a heat-conducting medium can be applied between the heat-conducting surface 22 and the heating element 30.

[0036] This utility model's technical solution involves providing a mounting groove 11 on one side of the mounting plate 10, with a through hole 12 on the bottom wall of the mounting groove 11. A ceramic heat-conducting plate 20 is installed in the mounting groove 11, and a heating element 30 is installed within the through hole 12, allowing the heating element 30 to be thermally connected to the heat-conducting surface 22 of the ceramic heat-conducting plate 20. This allows the heat from the heating element 30 to be directly conducted to the ceramic heat-conducting plate 20, reducing the need for conduction through the intermediate metal plate, minimizing heat loss, effectively improving heat conduction efficiency and heating speed, reducing user waiting time after power-on, and facilitating user operation.

[0037] In some embodiments, the mounting plate 10 has two protruding ribs 13 on the side opposite to the ceramic heat-conducting plate 20. The two protruding ribs 13 are respectively located on opposite sides of the through hole 12 and extend along the length direction of the mounting plate 10. By providing two protruding ribs 13, the structural strength of the mounting plate 10 can be effectively improved, the risk of deformation of the mounting plate 10 can be reduced, and the situation where the ceramic heat-conducting plate 20 falls off or breaks due to deformation of the mounting plate 10 during assembly or use can be avoided, thereby improving the reliability of the heating plate assembly 100. Optionally, the protruding ribs 13 extend from one end of the mounting plate 10 to the other end.

[0038] In some embodiments, each rib 13 is provided with a limiting portion 131 extending toward another rib 13. The limiting portion 131 is spaced apart from the mounting plate 10. The heating plate assembly 100 also includes an elastic support frame 40, which abuts between the heating element 30 and the limiting portion 131. Specifically, the limiting portion 131 is located at the end of the rib 13 away from the surface of the mounting plate 10, and the limiting portions 131 on the two ribs 13 are spaced apart from each other. The opposite sides of the elastic support frame 40 abut against the sides of the two limiting portions 131 facing the through hole 12. This arrangement can both press the heating element 30 onto the ceramic heat-conducting plate 20 through the elastic support frame 40 and facilitate the installation and fixation of the elastic support frame 40.

[0039] In some embodiments, the heating element 30 is a ceramic heating element or a heating film, and a metal plate 70 is provided between the heating element 30 and the elastic support frame 40. Specifically, the heating element 30 is generally flat, and the length and width of the metal plate 70 are not less than the length and width of the heating element 30 (i.e., the orthographic projection of the heating element 30 on the metal plate 70 is located on the metal plate 70). The metal plate 70 is stacked on the side of the heating element 30 closest to the elastic support frame 40, so that the contact area between the metal plate 70 and the heating element 30 is large, the force between the heating element 30 and the metal plate 70 is uniform, and the heating element 30 is prevented from being damaged due to concentrated force.

[0040] In some embodiments, the elastic support frame 40 includes a compression spring 41, which is arranged in multiple bends and abuts against the limiting portion 131 and the metal plate 70. Specifically, the compression spring 41 includes multiple elastic segments 411 and multiple limiting segments 412, which are sequentially and alternately connected. The multiple elastic segments 411 extend along the width direction of the mounting plate 10 and are spaced apart along the length direction of the mounting plate 10. The limiting segments 412 extend along the width direction of the mounting plate 10. The limiting segments 412 abut against the side of the limiting portion 131 facing the mounting plate 10, and the elastic segments 411 abut against the metal plate 70. This structure is simple, which simplifies the structure of the elastic support frame 40 and facilitates installation.

[0041] In some embodiments, the metal plate 70 has a clearance groove 71 on the side facing the heating element 30, and the heating plate assembly 100 also includes a thermal fuse 61, which is disposed in the clearance groove 71 and abuts against the heating element 30. This allows the thermal fuse 61 to be fixed by the metal plate 70, while also ensuring that the thermal fuse 61 is in direct contact with the metal plate 70, resulting in high reliability.

[0042] In some embodiments, the heating plate assembly 100 further includes a temperature sensor 62, and the elastic support frame 40 includes a spring 42, which abuts between the temperature sensor 62 and the limiting part 131. Thus, during installation, the heating element 30 can be fixed by the compression spring 41 first, which facilitates the subsequent installation and fixing of the temperature sensor 62.

[0043] In some embodiments, the side edges extending along the length direction of the mounting plate 10 are spaced apart from the ribs 13, and each rib 13 has a mounting portion 132 on the side opposite to the other rib 13. The mounting portion 132 can be used to connect to the straightener housing or mounting base 50, facilitating the assembly of the heating plate assembly 100 onto the straightener housing. By spaced the ribs 13 from the side edges of the mounting plate 10 and providing the mounting portion 132 on the outer side of the ribs 13, the reinforcing effect of the ribs 13 is enhanced, improving the structural strength of the mounting plate 10. It also fully utilizes the space between the ribs 13 and the side edges of the mounting plate 10, avoiding interference between the mounting portion 132 and the heating element 30.

[0044] In some embodiments, the heating plate assembly 100 further includes a mounting base 50, which covers the side of the mounting plate 10 opposite to the ceramic heat-conducting plate 20 and is connected to the rib 13. That is, the heating element 30 and the elastic support frame 40 can be covered by the mounting base 50, making the heating plate assembly 100 a single module. Therefore, when assembling the hair straightener, the heating plate assembly 100 can be directly installed as a single module onto the hair straightener housing, facilitating the assembly of the hair straightener. Optionally, the mounting base 50 has a mounting structure that is connected to the hair straightener housing.

[0045] In some embodiments, the mounting base 50 is connected to the assembly part 132, for example, the mounting base 50 is provided with a snap-fit ​​groove, and the assembly part 132 snaps into the snap-fit ​​groove; or, the mounting base 50 and the assembly part 132 are connected by screws.

[0046] In some embodiments, the distance between the heating element 30 and the inner wall of the through hole 12 is not less than 0.2 mm and not more than 1 mm. This arrangement allows for a larger size of the heating element 30, resulting in a larger contact area between the heating element 30 and the ceramic heat-conducting plate 20, while also preventing damage to the heating element 30 from contact with the mounting plate 10 due to thermal expansion and contraction. Specifically, the distance between the heating element 30 and the inner wall of the through hole 12 can be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1 mm.

[0047] In some embodiments, each of the two opposite sidewalls of the mounting groove 11 is provided with a limiting groove 111. The limiting groove 111 extends along the length of the mounting plate 10 and is through-hole at both ends. The opposite sides of the ceramic heat-conducting plate 20 are respectively provided with a snap-fit ​​portion 23, which snaps into the limiting groove 111. During installation, one end of the ceramic heat-conducting plate 20 can be inserted into the mounting groove 11 with the snap-fit ​​portion 23 corresponding to the limiting groove 111. This makes installation convenient, stable, and highly reliable. Of course, in other embodiments, a pressure plate can also be used to press the edge of the ceramic heat-conducting plate 20 to press the ceramic heat-conducting plate 20 into the limiting groove 111. The pressure plate is connected to the mounting plate 10.

[0048] This utility model also proposes a hair straightener, which includes a housing and a heating plate assembly 100. The specific structure of the heating plate assembly 100 is as described in the above embodiments. Since this hair straightener adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The housing has two openable clamping arms 80, each clamping arm 80 is provided with a heating plate assembly 100, and the ceramic heat-conducting plates 20 of the two heating plate assemblies 100 are arranged opposite to each other.

[0049] The housing is also equipped with an electrical control device, which is electrically connected to the heating element 30 of the heating plate assembly 100 to control the working state of the heating plate assembly 100.

[0050] Optionally, one end of the two clamping arms 80 is hinged to each other, and the other end is provided with a heating plate assembly 100, which allows the two clamping arms 80 to open and close to a large extent. Alternatively, the main body also includes a handle, one clamping arm 80 is fixed to the front end of the handle, the other clamping arm 80 is hinged to the front end of the handle, and has a pressing part spaced apart from the outer peripheral surface of the handle.

[0051] 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 hot plate assembly characterized by, The heating plate assembly comprises: a mounting plate, one side of which is provided with a mounting groove, a bottom wall of the mounting groove is provided with a through hole; a ceramic heat-conducting plate, having a heat-conducting surface and a curling surface which are opposite to each other, the ceramic heat-conducting plate is mounted in the mounting groove, the heat-conducting surface covers the through hole, and the curling surface is located outside the mounting groove; and a heating body mounted in the through hole and in thermal conduction connection with the heat-conducting surface. Two protruding ribs are provided on the side of the mounting plate which is away from the ceramic heat-conducting plate, the two protruding ribs are respectively arranged on opposite sides of the through hole and extend along the length direction of the mounting plate.

2. The hot plate assembly of claim 1, wherein, Each of the protruding ribs is provided with a limiting portion extending towards the other protruding rib, the limiting portion is spaced from the mounting plate, and the heating plate assembly further comprises an elastic supporting frame which is abutted between the heating body and the limiting portion.

3. The hot plate assembly of claim 2, wherein, The heating body is a ceramic heating body, and a metal plate is arranged between the heating body and the elastic supporting frame.

4. The hot plate assembly of claim 3, wherein, The elastic supporting frame comprises a compression spring which is arranged in multiple bending sections and is abutted between the limiting portion and the metal plate; and / or, the side of the metal plate which faces the heating body is provided with a avoiding groove, and the heating plate assembly further comprises a temperature fuse which is arranged in the avoiding groove and is abutted with the heating body.

5. The hot plate assembly of claim 4, wherein, The side edges of the mounting plate which extend along the length direction are spaced from the protruding ribs, and each of the protruding ribs is provided with an assembling portion on the side which is away from the other protruding rib.

6. The hot plate assembly of claim 2, wherein, The heating plate assembly further comprises a mounting seat which covers the side of the mounting plate which is away from the ceramic heat-conducting plate and is connected with the protruding ribs.

7. The hot plate assembly of claim 2, wherein The distance between the heating body and the inner wall surface of the through hole is not less than 0.2 mm and not more than 1 mm.

8. The hot plate assembly of claim 1, wherein, The opposite side walls of the mounting groove are respectively provided with limiting grooves which extend along the length direction of the mounting plate and are arranged in a through manner at both ends, and the opposite sides of the ceramic heat-conducting plate are respectively provided with clamping portions which are clamped in the limiting grooves.

9. The hot plate assembly of claim 1, wherein, The heating plate assembly comprises any one of the heating plate assemblies according to claims 1 to 9.

10. A straightening iron, characterized by ​

Images