Active heating hair straightener

Abstract

The utility model discloses an active heating hair straightener which comprises an upper hairpin, a lower hairpin and a control circuit, and an upper clamping piece is arranged on the upper hairpin; a lower clamping piece is arranged on the lower hairpin, and an inductor is further arranged on the upper hairpin or the lower hairpin; when the control circuit acquires that the upper hairpin and the lower hairpin are in an open state through the inductor, the temperature of the upper clamping piece and the temperature of the lower clamping piece are controlled to be a first temperature; or when the control circuit acquires that the upper hairpin and the lower hairpin are in a clamping state through the inductor, the temperature of the upper clamping piece and the temperature of the lower clamping piece are controlled to be the second temperature; wherein the first temperature is lower than the second temperature. In this way, the temperature control temperature in the perm process is increased by judging the state change of the opening and closing clamp, and therefore the efficiency of the hair straightener is improved. The problems that in the prior art, in the perming process, temperature compensation lags behind, the temperature difference of first-time perming is large, consequently, hair is injured, and the temperature returning efficiency is poor in the rest interval are solved.

Description

Technical Field

[0001] This utility model relates to the field of hair straightener technology, and in particular to an active heating hair straightener. Background Technology

[0002] Existing hair straighteners typically operate using software IC temperature control, which involves using a temperature sensing component to detect when the hair straightener's temperature drops and then adding heat to compensate for the temperature drop, thus maintaining a stable temperature. This method is referred to here as "passive heating".

[0003] This passive heating method has drawbacks in the perming process. Because the heat from the straightener is conducted to the cooler hair during perming, there is a time lag between the heat loss from the straightener's working surface and the temperature-sensing components. The temperature compensation of the straightener lags behind the start of the perming process, resulting in poor temperature compensation efficiency. Furthermore, the large temperature difference between the stable temperature of the straightener's working surface and the perming temperature leads to significant temperature differences during the first perming session after temperature stabilization, potentially damaging the hair (e.g., ...). Figure 7 (As shown).

[0004] In addition, during the rest interval after straightening a section of hair, there is a temperature difference between the inside (heating components, temperature sensing components) and the outside (working surface) of the hair straightener when the temperature changes. After the internal temperature of the hair straightener reaches a stable temperature, the software running the controller IC stops large-scale temperature compensation. However, at this time, the temperature compensation of the working surface has not reached a stable temperature, and it can only continue to compensate for the temperature through slow heat transfer, resulting in poor temperature recovery efficiency. Utility Model Content

[0005] The present invention aims to at least partially solve one of the technical problems in the related art. Therefore, one objective of the present invention is to provide an active heating hair straightener.

[0006] To achieve the above objectives, the active heating hair straightener according to an embodiment of the present invention includes:

[0007] Upper hair clip, wherein the upper hair clip is provided with an upper clip piece;

[0008] The lower hair clip is provided with a lower clip piece, and the upper hair clip or the lower hair clip is also provided with a sensor;

[0009] The control circuit, when the sensor detects that the upper hair clip and the lower hair clip are in the open state, controls the temperature of the upper clip and the lower clip to a first temperature.

[0010] Alternatively, when the control circuit detects through the sensor that the upper and lower hair clips are in a closed state, it controls the temperature of the upper and lower clips to a second temperature; wherein the first temperature is lower than the second temperature.

[0011] Furthermore, according to one embodiment of the present invention, the sensor includes any one or more of a Hall sensor, an optocoupler sensor, an infrared sensor, or a touch switch.

[0012] Furthermore, according to one embodiment of the present invention, the active heating hair straightener further includes a magnet, the sensor is a Hall sensor, one of the upper hair clips or the lower hair clips is provided with the Hall sensor, and the other of the upper hair clips or the lower hair clips is provided with the magnet at a position opposite to the Hall sensor.

[0013] Furthermore, according to one embodiment of the present invention, the control circuit includes:

[0014] Controller;

[0015] The sensing circuit is used to electrically connect the sensors to the controller, and the controller is used to obtain the opening and closing states of the upper and lower hair clips through the sensors.

[0016] A heating circuit is connected to the controller to control the temperature of the upper and lower clamping plates under the control of the controller.

[0017] Furthermore, according to one embodiment of the present invention, the heating circuit includes:

[0018] First heating element;

[0019] The second heating element has one end of the first heating element and one end of the second heating element connected to one end of the power supply.

[0020] A semiconductor switch, wherein the first connection terminal of the semiconductor switch is connected to the other end of the first heater and the other end of the second heater respectively, the second connection terminal of the semiconductor switch is connected to the other end of the power supply, and the controlled terminal of the semiconductor switch is connected to the heating control signal output terminal of the controller; wherein, the first heater is used to heat the upper clip, and the second heater is used to heat the lower clip.

[0021] Furthermore, according to one embodiment of the present invention, the control circuit further includes:

[0022] A voltage detection circuit is provided, which is connected to the controller. The controller detects the voltage of the power supply through the voltage detection circuit and controls the heating of the first and second heaters based on the voltage of the power supply.

[0023] Furthermore, according to one embodiment of the present invention, the control circuit further includes:

[0024] A button control circuit includes a control button connected to the controller to send a control signal to the controller. The controller also controls the heating of the first heater and the second heater according to the control signal.

[0025] This utility model provides an active heating hair straightener with an upper clip on an upper hair clip and a lower clip on a lower hair clip. Each hair clip also has a sensor. When the control circuit detects that the upper and lower hair clips are in an open state via the sensor, it controls the temperature of the upper and lower clips to a first temperature; or, when the control circuit detects that the upper and lower hair clips are in a closed state via the sensor, it controls the temperature of the upper and lower clips to a second temperature. The first temperature is lower than the second temperature. Thus, by judging the change in the open / closed state of the clips, the temperature control during the straightening process is improved, thereby increasing the efficiency of the hair straightener. This overcomes the problems of delayed temperature compensation during the straightening process, large temperature differences during the first straightening session leading to hair damage, and poor temperature recovery efficiency during rest intervals in existing technologies. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the active heating hair straightener provided by this utility model, showing the upper and lower hair clips in the open state and a partial cross-sectional structure at point A.

[0027] Figure 2 for Figure 1 A partial enlarged structural diagram of A;

[0028] Figure 3 This is a schematic diagram of the active heating hair straightener provided by this utility model, showing the upper and lower hair clips in the open state and a partial cross-sectional structure at point B.

[0029] Figure 4 for Figure 3 A magnified schematic diagram of the B-section structure;

[0030] Figure 5 A schematic diagram of the control circuit structure provided by this utility model;

[0031] Figure 6 A schematic diagram of another open clamp state structure of the active heating hair straightener provided by this utility model;

[0032] Figure 7 Temperature curves of the upper and lower clips of a conventional hair straightener during use;

[0033] Figure 8Temperature curves of the upper and lower clips of the active heating hair straightener provided by this utility model from the open state to the closed state during use;

[0034] Figure 9 Temperature curves of the upper and lower clips of the hair straightener provided in this embodiment of the utility model during use.

[0035] Figure Labels

[0036] Hair clip 10;

[0037] Upper clip 101;

[0038] Hair clip 20;

[0039] Lower clip 201;

[0040] Sensor 30;

[0041] Magnet 40;

[0042] Temperature adjustment buttons 50.

[0043] 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

[0044] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the present invention.

[0045] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0046] See Figures 1 to 5This utility model provides an active heating hair straightener, including: an upper hair clip 10, a lower hair clip 20, and a control circuit. The upper hair clip 10 is provided with an upper clip 101; the lower hair clip 20 is provided with a lower clip 201; and a sensor 30 is also provided on the upper hair clip 10 or the lower hair clip 20. The control circuit is used to obtain the opening and closing state of the upper hair clip 10 and the lower hair clip 20 through the sensor 30, and to control the temperature of the upper clip 101 and the lower clip 201 according to the opening and closing state of the upper hair clip 10 and the lower hair clip 20. The control circuit may be provided with a controller, which obtains the detection signal from the sensor and controls the temperature of the upper clip 101 and the lower clip 201. Thus, the temperature of the upper hair clip 101 and lower hair clip 201 can be dynamically controlled by the control circuit, maintaining a suitable temperature for the upper hair clip 101 and lower hair clip 201 during hair straightening control, thereby reducing damage to the hair roots from high temperatures; at the same time, better straightening effect can be achieved. When the control circuit detects through the sensor 30 that the upper hair clip 101 and lower hair clip 201 are in the open state, the temperature of the upper hair clip 101 and lower hair clip 201 is controlled at a first temperature; or, when the control circuit detects through the sensor 30 that the upper hair clip 101 and lower hair clip 201 are in the closed state, the temperature of the upper hair clip 101 and lower hair clip 201 is controlled at a second temperature; wherein, the first temperature is lower than the second temperature. The sensor 30 includes any one or more of a Hall sensor, an optocoupler sensor, an infrared sensor, or a touch switch. It should be noted that in some other embodiments of this usage information, other sensors not listed may be used according to actual application needs, which will not be described again. Figure 1 and Figure 2 As shown, when the upper hair clip 10 and the lower hair clip 20 are in the open state, because the angle between the upper hair clip 10 and the lower hair clip 20 is relatively large, the distance between the position of the sensor 30 and the other hair clip is also relatively large. Figure 3 and Figure 4 As shown, when the upper hair clip 10 and the lower hair clip 20 are in the closed state, the angle between the upper hair clip 10 and the lower hair clip 20 is relatively small, so the distance between the position of the sensor 30 and the other hair clip is also relatively small. The sensor 30 detects the distance between itself and the other hair clip and sends the detection information to the controller, which can then determine whether the upper hair clip 10 and the lower hair clip 20 are in the open or closed state.

[0047] When a user uses this active heating hair straightener to straighten their hair, the upper hair clip 10 and lower hair clip 20 are gradually closed under the control of the applied force. During this process, the angle between the upper hair clip 10 and lower hair clip 20 gradually decreases, and correspondingly, the distance between the sensor and the other hair clip also gradually decreases. When the controller detects that the angle between the upper hair clip 10 and lower hair clip 20 reaches a certain angle, it can control the upper clip 101 and lower clip 201 to heat up. This raises the temperature of the upper clip 101 and lower clip 201 from a first temperature to a second temperature. For example, between the opening and closing of the hair straightener, when the straightener is closed to a certain angle, it can be considered as closed. The controller takes the sensor output signal at this time, converts it into the corresponding voltage value, and stores it in the chip. Afterwards, each time the straightener is opened or closed, the controller compares the voltage value collected by the sensor output with the voltage value stored in the chip to determine whether the straightener is open or closed. The controller can be a microcontroller unit (MCU). In this way, by judging the changes in the opening and closing of the hair straightener, the temperature control during the perming process can be improved, thereby increasing the efficiency of the hair straightener. This overcomes the problems of delayed temperature compensation during the perming process, large temperature difference during the first perm leading to hair damage, and poor temperature recovery efficiency during rest intervals in existing technologies.

[0048] Among them, see Figure 8 and Figure 9 In one embodiment of this utility model, the temperature can be increased by about 30°C (e.g., Figure 8 (As shown in the diagram). Thus, the temperature of the upper clip 101 and lower clip 201 when clamping hair is approximately 30°C higher than the temperature when they are unclamped. This compensates for the temperature loss of the upper clip 101 and lower clip 201 during hair pulling, thereby eliminating the need for a relatively high initial setting temperature (such as...). Figure 9(As shown in the diagram). This avoids heat damage to the hair roots caused by the high initial temperature setting. In other words, during hair straightening, the sensor receives the pulling signal and preheats the hair before pulling, compensating for the temperature loss of the straightener plates during the straightening process. This results in higher efficiency than traditional heated straighteners, especially in improving the dynamic temperature range during straightening. By using a sensor to compensate for the temperature difference between the opening and closing of the clips and preheating them before contact with the hair, the difference between the initial temperature setting and the dynamic temperature range during straightening is effectively reduced. This reduces the temperature difference between the initial setting and the straightening range, allowing for the use of lower temperature settings, improving straightening efficiency and reducing damage to the hair roots from high temperatures. Furthermore, the sensor detects when the clip closes and immediately increases the power to raise the temperature of the upper clip 101 and lower clip 201, shortening the delay of increasing power after the temperature drops during straightening and improving the stable temperature when the clip is closed, indirectly optimizing the temperature compensation effect. When users straighten their hair, they can start straightening it at a lower temperature, solving the problem of hair clips in existing technologies requiring a high temperature setting, which causes large temperature differences and damage to the hair during the first pull. The hair clip's heat retention effect is improved, and the actual dynamic temperature range during straightening is close to the initial set temperature, thus narrowing the dynamic temperature range.

[0049] Preferably, in one embodiment of the present invention, the active heating hair straightener further includes a magnet 40, the sensor 30 is a Hall sensor 30, one of the upper hair clip 10 or the lower hair clip 20 is provided with the Hall sensor 30, and the other of the upper hair clip 10 or the lower hair clip 20 is provided with the magnet 40 at a position opposite to the Hall sensor 30.

[0050] Preferably, in one embodiment of the present invention, the active heating hair straightener further includes a magnet 40, the sensor 30 is a Hall sensor 30, one of the upper hair clip 10 or the lower hair clip 20 is provided with the Hall sensor 30, and the other of the upper hair clip 10 or the lower hair clip 20 is provided with the magnet 40 at a position opposite to the Hall sensor 30.

[0051] See Figure 5 The control circuit includes a controller, a sensing circuit, and a heating circuit. The sensor 30 is electrically connected to the controller through the sensing circuit. The controller is used to obtain the opening and closing states of the upper hair clip 10 and the lower hair clip 20 through the sensor 30. The heating circuit is connected to the controller to control the temperature of the upper clip 101 and the lower clip 201 under the control of the controller.

[0052] like Figure 5As shown, the sensing circuit may include a sensor U3 (30). The power supply terminal and ground terminal of the sensor U3 (30) can be connected by a capacitor C14 to ensure the stability of the power supply of the sensor U3 (30). The signal detected and output by the sensor U3 (30) is output to the detection terminal of the controller U1 through a resistor R12, so that the controller U1 can obtain the angle information between the upper hair clip 10 and the lower hair clip 20.

[0053] like Figure 5 As shown, the heating circuit includes: a first heater (Hearter1), a second heater (Hearter2), and a semiconductor switch. One end of the first heater (Hearter1) and one end of the second heater (Hearter2) are respectively connected to one end of a power supply. The first connection terminal of the semiconductor switch is connected to the other end of the first heater (Hearter1) and the other end of the second heater (Hearter2). The second connection terminal of the semiconductor switch is connected to the other end of the power supply. The controlled terminal of the semiconductor switch is connected to the heating control signal output terminal of the controller. The first heater (Hearter1) is used to heat the upper clamping plate 101, and the second heater (Hearter2) is used to heat the lower clamping plate 201.

[0054] The heating circuit operates as follows: when the controller U1 needs to control the heating of the upper clip 101 and lower clip 201, it can output a trigger signal to the semiconductor switch via resistor R30, diode D3, and resistor R26. The semiconductor switch can be a bidirectional or unidirectional thyristor. In this embodiment, a bidirectional thyristor TRIAC1 is used. Under the trigger signal from the controller, the control terminal of the bidirectional thyristor TRIAC1 can be controlled to conduct through its two ends, thereby connecting the parallel circuits of the first heater (Hearter1) and the second heater (Hearter2). The first heater (Hearter1) and the second heater (Hearter2) then heat up, respectively heating the upper clip 101 and the lower clip 201. Thus, the upper clip 101 and the lower clip 201 can be heated under the control of the controller. The heating circuit may also include a current detection circuit for detecting the current in the heating circuit. The current detection circuit includes a resistor R29 connected in series in the heating circuit to detect the current in the circuit and transmit the collected current information to the controller via resistor R28. Capacitor C8 filters out interference signals in the current detection signal. Additionally, it may include a resistor R19 and a capacitor C10, connected in parallel between the control terminal of the bidirectional TRIAC1 and the second connection terminal T2 of the TRIAC1 channel. Capacitor C10 filters out interference signals in the control terminal of the TRIAC1. Resistor R19 provides a pull-down low level to the control terminal of the TRIAC1.

[0055] See Figure 5 The control circuit further includes a voltage detection circuit, which is connected to the controller. The controller detects the voltage of the power supply through the voltage detection circuit, and also controls the heating of the first and second heaters based on the voltage of the power supply. Figure 5 As shown, the voltage detection circuit may include resistors R24 and R25. One end of resistor R24 ​​is connected to one end of the input power supply, and the other end of resistor R24 ​​is connected to one end of resistor R25. The other end of resistor R25 is connected to the other end of the input power supply. Resistors R24 and R25 form a voltage divider circuit, dividing the input power supply voltage before inputting it to the voltage detection terminal of the controller. In this way, the controller can obtain the voltage of the input power supply and output a corresponding pulse width signal according to the magnitude of the input voltage to control the power of the first heater (Hearter1) and the second heater (Hearter2). This allows for better control of the heating and temperature rise of the upper clip 101 and the lower clip 201.

[0056] See Figure 5 The control circuit further includes a button control circuit, which includes control buttons connected to the controller to send control signals to the controller. The controller then controls the heating of the first and second heaters based on the control signals. The control buttons can input button signals to the button detection terminal of the controller. This allows the controller to acquire the corresponding control signals and output corresponding pulse width signals to control the power of the first heater (Hearter1) and the second heater (Hearter2). This enables better control of the heating of the upper clamping plate 101 and the lower clamping plate 201.

[0057] See Figure 5 The control circuit further includes a voltage conversion circuit, which converts the input power supply into the power supply VCC for the controller, sensor 30 and button control circuit.

[0058] See Figure 6 The temperature-controlled hair straightener provided in this embodiment of the invention may also be equipped with multiple buttons, such as temperature adjustment buttons and a power button. The temperature adjustment buttons control the temperature of the upper clip 101 and lower clip 201 by increasing or decreasing the temperature. The power button controls the automatic temperature control hair straightener to turn on and off. The temperature-controlled hair straightener may also have LED indicator lights and LED light covers; the LED indicator lights can be used to indicate the working status of the hair straightener through the LED light covers.

[0059] The above are merely embodiments of this utility model, but do not limit the patent scope of this utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes and variations are within the protection scope of the present invention.

Claims

1. An active heating hair straightener, characterized in that, include: Upper hair clip, wherein the upper hair clip is provided with an upper clip piece; The lower hair clip is provided with a lower clip piece, and the upper hair clip or the lower hair clip is also provided with a sensor; The control circuit, when the sensor detects that the upper hair clip and the lower hair clip are in the open state, controls the temperature of the upper clip and the lower clip to a first temperature. Alternatively, when the control circuit detects through the sensor that the upper and lower hair clips are in a closed state, it controls the temperature of the upper and lower clips to a second temperature; wherein the first temperature is lower than the second temperature.

2. The active heating hair straightener according to claim 1, characterized in that, The sensor includes any one or more of the following: Hall sensor, optocoupler sensor, infrared sensor, or touch switch.

3. The active heating hair straightener according to claim 2, characterized in that, It also includes a magnet, and the sensor is a Hall sensor. One of the upper hair clips or the lower hair clip is equipped with the Hall sensor, and the other of the upper hair clips or the lower hair clip is equipped with the magnet at a position opposite to the Hall sensor.

4. The active heating hair straightener according to any one of claims 1 to 3, characterized in that, The control circuit includes: Controller; The sensing circuit is used to electrically connect the sensors to the controller, and the controller is used to obtain the opening and closing states of the upper and lower hair clips through the sensors. A heating circuit is connected to the controller to control the temperature of the upper and lower clamping plates under the control of the controller.

5. The active heating hair straightener according to claim 4, characterized in that, The heating circuit includes: First heating element; The second heating element has one end of the first heating element and one end of the second heating element connected to one end of the power supply. A semiconductor switch, wherein the first connection terminal of the semiconductor switch is connected to the other end of the first heater and the other end of the second heater respectively, the second connection terminal of the semiconductor switch is connected to the other end of the power supply, and the controlled terminal of the semiconductor switch is connected to the heating control signal output terminal of the controller; wherein, the first heater is used to heat the upper clip, and the second heater is used to heat the lower clip.

6. The active heating hair straightener according to claim 5, characterized in that, The control circuit also includes: A voltage detection circuit is provided, which is connected to the controller. The controller detects the voltage of the power supply through the voltage detection circuit and controls the heating of the first and second heaters based on the voltage of the power supply.

7. The active heating hair straightener according to claim 5 or 6, characterized in that, The control circuit also includes: A button control circuit includes a control button connected to the controller to send a control signal to the controller. The controller also controls the heating of the first heater and the second heater according to the control signal.

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