A hair straightener

Abstract

This utility model relates to a hair straightener, comprising: a housing assembly including a main clamp arm and a secondary clamp arm, one end of the main clamp arm and the secondary clamp arm being hinged together to form a clamping groove between the main clamp arm and the secondary clamp arm; a constant temperature heating module including a ceramic contact plate, an NTC temperature sensor and an MCH heating plate, the ceramic contact plate being disposed on the main clamp arm and / or the secondary clamp arm and protruding from the clamping groove, the side of the ceramic contact plate facing away from the clamping groove having a first mounting groove, the NTC temperature sensor and the MCH heating plate both being located in the first mounting groove; a control circuit board, the NTC temperature sensor and the MCH heating plate being electrically connected to the control circuit board; and a distance sensor for acquiring the distance between the main clamp arm and the secondary clamp arm and being electrically connected to the control circuit board.

Description

Technical Field

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

[0002] Existing hair straighteners have shortcomings in temperature control. The heating element of existing hair straighteners is generally an aluminum plate with an MCH (Medium Heating Element) and an external temperature sensor (NTC). On the one hand, inconsistent installation methods can easily lead to inconsistent temperature data, and on the other hand, it increases labor costs. Secondly, because the aluminum plate does not store enough energy, the temperature sensing element is not sensitive and has a lag, resulting in a significant drop in the surface temperature of the aluminum plate during the hair styling process, such as dropping directly from 200°C to 110°C. This results in poor hair styling effect, low market competitiveness, and inability to meet current needs. Utility Model Content

[0003] Given the above situation, it is necessary to propose a hair straightener with better temperature control.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a hair straightener, comprising:

[0005] The housing assembly includes a main clamping arm and a secondary clamping arm, one end of which is hinged to each other to form a clamping groove between them.

[0006] A constant temperature heating module includes a ceramic contact plate, an NTC temperature sensor, and an MCH heating plate. The ceramic contact plate is disposed on the main clamping arm and / or the auxiliary clamping arm and protrudes from the clamping groove. A first mounting groove is provided on the side of the ceramic contact plate facing away from the clamping groove. The NTC temperature sensor and the MCH heating plate are both located in the first mounting groove.

[0007] The control circuit board, the NTC temperature sensor and the MCH heating plate are both electrically connected to the control circuit board;

[0008] A distance sensor is used to obtain the distance between the main clamping arm and the auxiliary clamping arm, and is electrically connected to the control circuit board.

[0009] Furthermore, the distance sensor is a Hall sensor, which includes a Hall element and a Hall magnet, with one of the Hall element and the Hall magnet disposed in the main clamping arm and the other disposed in the secondary clamping arm.

[0010] Furthermore, the clamping groove includes an outer groove and an inner groove, the ceramic contact plate protrudes from the outer groove, and the control circuit board is located in the main clamping arm and / or the auxiliary clamping arm corresponding to the inner groove.

[0011] Furthermore, the constant temperature heating module also includes an elastic element that has a restoring force to bring the MCH heating plate and the NTC temperature sensor close to the ceramic contact plate.

[0012] Furthermore, the ceramic contact plate has two spaced-apart protrusions on the side facing away from the clamping groove, and the two protrusions form the first mounting groove, in which the NTC temperature sensor and the MCH heating plate are disposed.

[0013] Furthermore, a baffle extends from the end of the convex plate away from the clamping groove, and the elastic element abuts against the baffle.

[0014] Furthermore, the constant temperature heating module also includes an aluminum plate, which is attached to the side of the MCH heating plate facing away from the ceramic contact plate, and the elastic element abuts against the aluminum plate.

[0015] Furthermore, the side of the MCH heating plate facing away from the clamping groove is provided with a heat insulation element.

[0016] Furthermore, the heat insulation component has a second mounting groove, in which both the MCH heating plate and the NTC temperature sensor are enclosed.

[0017] Furthermore, the edge of the ceramic contact plate facing away from the clamping groove is provided with a baffle that forms a third mounting groove with the adjacent convex plate, the side wall of the heat insulation member is fitted into the third mounting groove, and the convex plate extends into the second mounting groove.

[0018] Furthermore, each of the main clamping arm and the auxiliary clamping arm is provided with a ceramic contact plate, an NTC temperature sensor, an MCH heating plate, and a control circuit board. The control circuit board in the main clamping arm is electrically connected to the control circuit board in the auxiliary clamping arm.

[0019] The beneficial effects of this utility model are as follows: The main clamping arm and the auxiliary clamping arm of the housing assembly are connected by a hinge, forming a clamping groove for holding the hair. The MCH heating plate of the constant temperature heating module transfers temperature to the hair through a ceramic contact plate, thereby shaping the hair. A distance sensor is provided. When the main clamping arm and the auxiliary clamping arm approach to hold the hair, the distance sensor transmits an electrical signal to the control circuit board, preheating the hair, resulting in a higher temperature applied to the hair for a longer duration and better hair shaping effect. The use of a built-in NTC temperature sensor, which is attached to the ceramic contact plate through the first mounting slot, provides more accurate temperature measurement. The use of the ceramic contact plate and the MCH heating plate ensures stable temperature, reducing hair damage, enhancing hair shine, and enabling quick and smooth styling. The constant temperature heating module of this application allows for precise temperature control, maintaining the temperature better between 135℃ and 150℃, without damaging the hair while providing better styling results. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a hair straightener according to an embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional structural diagram of a hair straightener according to an embodiment of the present invention;

[0022] Figure 3 This is an exploded structural diagram of a hair straightener according to an embodiment of the present invention.

[0023] Label Explanation:

[0024] 100. Housing assembly; 110. Main clamping arm; 111. Protrusion; 120. Secondary clamping arm; 121. Secondary mounting slot;

[0025] 130. Hinge; 140. Gap; 141. Outer groove; 142. Inner groove; 151. Front groove;

[0026] 152. Rear groove; 200. MCH heating plate; 300. Control circuit board; 400. NTC temperature sensor;

[0027] 510. Hall element; 520. Hall magnet; 600. Elastic element; 700. First heat insulation element;

[0028] 800, Second thermal insulation component; 900, Thermal fuse. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description of a hair straightener, in conjunction with the accompanying drawings and embodiments, is provided. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the scope of the utility model.

[0030] Please refer to Figures 1-3 A hair straightener, comprising:

[0031] The housing assembly 100 includes a main clamping arm 110 and a secondary clamping arm 120. One end of the main clamping arm 110 and the secondary clamping arm 120 are hinged together by a hinge 130 to form a clamping groove 140 between the main clamping arm 110 and the secondary clamping arm 120.

[0032] The constant temperature heating module 200 includes a ceramic contact plate 210, an NTC temperature sensor 220, and an MCH heating plate 230. The ceramic contact plate 210 is disposed on the main clamping arm 110 and / or the auxiliary clamping arm 120 and protrudes from the clamping groove 140. The side of the ceramic contact plate 210 facing away from the clamping groove 140 is provided with a first mounting groove 213. The NTC temperature sensor 220 and the MCH heating plate 230 are both located in the first mounting groove 213.

[0033] The control circuit board 300, NTC temperature sensor 220, and MCH heating plate 230 are all electrically connected to the control circuit board 300.

[0034] A distance sensor is used to obtain the distance between the main clamping arm 110 and the auxiliary clamping arm 120, and is electrically connected to the control circuit board 300.

[0035] The main clamping arm 110 and the auxiliary clamping arm 120 of the housing assembly 100 are connected by a hinge, forming a clamping groove 140 for clamping hair. The MCH heating plate 230 of the constant temperature heating module 200 transmits temperature to the hair through the ceramic contact plate 210, thereby shaping the hair. A distance sensor is provided. When the main clamping arm 110 and the auxiliary clamping arm 120 approach the hair, the distance sensor transmits an electrical signal to the control circuit board 300 to preheat the hair, resulting in a higher temperature applied to the hair for a longer duration and better hair shaping effect. The use of a built-in NTC temperature sensor 220, which is attached to the ceramic contact plate 210 through the first mounting groove 213, provides more accurate temperature measurement. The use of the ceramic contact plate 210 and the MCH heating plate 230 ensures stable temperature, reduces hair damage, enhances hair shine, and allows for quick and smooth styling. The constant temperature heating module 200 of this application can achieve precise temperature control, so that the temperature can be better maintained at 135℃-150℃, which can not damage the hair and have a better styling effect.

[0036] Please refer to Figure 2 and Figure 3The distance sensor is a Hall sensor, comprising a Hall element 410 and a Hall magnet 420. One of the Hall element 410 and the Hall magnet 420 is disposed within the main clamping arm 110, and the other is disposed within the secondary clamping arm 120. Using a Hall distance sensor, the Hall effect is utilized to detect the approach of a magnetic object. When the object approaches the sensing surface of the switch to the operating distance, no mechanical contact or pressure is required, resulting in a long service life and low failure rate. Alternatively, other distance sensors can be used as needed, such as photoelectric proximity switches, ultrasonic distance sensors, and capacitive-inductive proximity switches.

[0037] Please refer to Figure 1 and Figure 2 The clamping groove 140 includes an outer groove 141 and an inner groove 142. The ceramic contact plate 210 protrudes from the outer groove 141, and the control circuit board 300 is located in the main clamping arm 110 and / or the auxiliary clamping arm 120 corresponding to the inner groove 142. The inner and outer grooves 141 can extend the length of the hair straightener, making it easier to hold and maintaining a safe grip, preventing fingers from entering the outer groove 141. At the same time, the temperature of the housing assembly 100 corresponding to the inner groove 142 is lower, making it more convenient to hold.

[0038] Please refer to Figure 2 and Figure 3 The constant temperature heating module 200 also includes an elastic element 240, which has a restoring force to bring the MCH heating plate 230 and the NTC temperature sensor 220 close to the ceramic contact plate 210. This keeps the MCH heating plate 230, the NTC temperature sensor 220 and the ceramic contact plate 210 in contact, improving the accuracy of temperature detection and the efficiency of heat conduction.

[0039] Please refer to Figure 2 and Figure 3 The ceramic contact plate 210 has two spaced-apart protrusions 211 on the side facing away from the clamping groove 140, forming a first mounting groove 213. The NTC temperature sensor 220 and the MCH heating plate 230 are disposed within the first mounting groove 213, ensuring installation stability and heat conduction stability.

[0040] Please refer to Figure 2 and Figure 3 A baffle 212 extends from the end of the protruding plate 211 away from the clamping groove 140, and the elastic element 240 abuts against the baffle 212. Preferably, the elastic element 240 is a serpentine spring, which has multiple contact points to ensure stable contact and adhesion between the MCH heating plate 230 and the ceramic.

[0041] Please refer to Figure 2 and Figure 3The constant temperature heating module 200 also includes an aluminum plate 260, which is attached to the side of the MCH heating plate 230 facing away from the ceramic contact plate 210, and an elastic member 240 abuts against the aluminum plate 260. The aluminum plate 260 protects the MCH heating plate 230 and prevents the elastic member 240 from damaging it. Preferably, the MCH heating plate 230 and the NTC temperature sensor 220 are arranged side-by-side, with the aluminum plate 260 covering both; or, in another embodiment of this invention, the NTC temperature sensor 220 is positioned between the MCH heating plate 230 and the ceramic contact plate 210.

[0042] Please refer to Figure 2 and Figure 3 The heating plate 230 of the MCH has a heat insulation element 250 on the side facing away from the clamping groove 140. The heat insulation element 250 is provided to prevent burns.

[0043] Please refer to Figure 2 and Figure 3 The heat insulation component 250 has a second mounting groove 251, within which the MCH heating plate 230 and the NTC temperature sensor 220 are both enclosed. The second mounting groove 251 not only improves installation stability but also provides better heat insulation, allowing heat to be concentrated and transferred to the clamping groove 140.

[0044] Please refer to Figure 2 and Figure 3 The ceramic contact plate 210 has a baffle 214 on its edge facing away from the clamping groove 140, forming a third mounting groove 215 with the adjacent protruding plate 211. The side wall of the heat insulation component 250 fits into the third mounting groove 215, and the protruding plate 211 extends into the second mounting groove 251. This makes the side of the ceramic contact plate 210 facing the clamping groove 140 smooth and free of marks, allowing for better contact with hair, and making the installation of the ceramic contact plate 210 and the heat insulation component 250 convenient and simple.

[0045] Please refer to Figure 2 and Figure 3 Each of the main clamping arm 110 and the auxiliary clamping arm 120 is equipped with a ceramic contact plate 210, an NTC temperature sensor 220, an MCH heating plate 230, and a control circuit board 300. The control circuit board 300 in the main clamping arm 110 is electrically connected to the control circuit board 300 in the auxiliary clamping arm 120. This means a dual constant-temperature heating module 200 with dual circuit boards can be used. Alternatively, a dual constant-temperature heating module 200 with a single circuit board or a single constant-temperature heating module 200 with a single circuit board can be used as needed.

[0046] Understandably, MCH stands for Metal Ceramics Heater. NTC stands for Negative Temperature Coefficient, referring to the phenomenon and materials of thermistors whose resistance decreases exponentially with increasing temperature, exhibiting a negative temperature coefficient.

[0047] Thermal insulation components 250 are generally made of glass fiber, ceramic fiber, polyurethane foam, polystyrene foam, etc.

[0048] 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.

[0049] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such 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. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0050] In summary, this utility model provides a hair straightener in which the main clamping arm and the auxiliary clamping arm of the housing assembly are connected by a hinge, forming a clamping groove for holding the hair. The MCH heating plate of the constant temperature heating module transfers temperature to the hair through a ceramic contact plate, thereby shaping the hair. A distance sensor is provided; when the main clamping arm and the auxiliary clamping arm approach to hold the hair, the distance sensor transmits an electrical signal to the control circuit board, preheating the hair and resulting in a higher temperature applied to the hair for a longer duration, thus achieving a better hair shaping effect. The use of a built-in NTC temperature sensor, which is attached to the ceramic contact plate through a first mounting slot, provides more accurate temperature measurement. The use of the ceramic contact plate and the MCH heating plate ensures stable temperature, reducing hair damage, enhancing hair shine, and enabling quick and smooth styling. The constant temperature heating module of this application allows for precise temperature control, maintaining the temperature between 135℃ and 150℃, ensuring better styling results without damaging the hair.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A hair straightener, characterized in that, include: The housing assembly includes a main clamping arm and a secondary clamping arm, one end of which is hinged to each other to form a clamping groove between them. A constant temperature heating module includes a ceramic contact plate, an NTC temperature sensor, and an MCH heating plate. The ceramic contact plate is disposed on the main clamping arm and / or the auxiliary clamping arm and protrudes from the clamping groove. A first mounting groove is provided on the side of the ceramic contact plate facing away from the clamping groove. The NTC temperature sensor and the MCH heating plate are both located in the first mounting groove. The control circuit board, the NTC temperature sensor and the MCH heating plate are both electrically connected to the control circuit board; A distance sensor is used to obtain the distance between the main clamping arm and the auxiliary clamping arm, and is electrically connected to the control circuit board.

2. A hair straightener according to claim 1, characterized in that, The distance sensor is a Hall sensor, which includes a Hall element and a Hall magnet. One of the Hall element and the Hall magnet is disposed in the main clamping arm and the other is disposed in the secondary clamping arm.

3. A hair straightener according to claim 1, characterized in that, The clamping groove includes an outer groove and an inner groove. The ceramic contact plate protrudes from the outer groove, and the control circuit board is located in the main clamping arm and / or the auxiliary clamping arm corresponding to the inner groove.

4. A hair straightener according to claim 1, characterized in that, The constant temperature heating module also includes an elastic element that has a restoring force to bring the MCH heating plate and the NTC temperature sensor close to the ceramic contact plate.

5. A hair straightener according to claim 4, characterized in that, The ceramic contact plate has two spaced-apart protrusions on the side facing away from the clamping groove. The two protrusions form the first mounting groove, and the NTC temperature sensor and the MCH heating plate are disposed in the first mounting groove.

6. A hair straightener according to claim 5, characterized in that, A baffle extends from the end of the convex plate away from the clamping groove, and the elastic element abuts against the baffle.

7. A hair straightener according to claim 6, characterized in that, The constant temperature heating module also includes an aluminum plate, which is attached to the side of the MCH heating plate facing away from the ceramic contact plate, and the elastic element abuts against the aluminum plate.

8. A hair straightener according to any one of claims 5-7, characterized in that, The side of the MCH heating plate facing away from the groove is provided with a heat insulation element.

9. A hair straightener according to claim 8, characterized in that, The heat insulation component has a second mounting groove, and both the MCH heating plate and the NTC temperature sensor are enclosed in the second mounting groove.

10. A hair straightener according to claim 9, characterized in that, The edge of the ceramic contact plate facing away from the clamping groove is provided with a baffle that forms a third mounting groove with the adjacent convex plate. The side wall of the heat insulation component is fitted into the third mounting groove, and the convex plate extends into the second mounting groove.

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