Heating structure of wireless hair straightening comb

Abstract

The utility model belongs to the technical field of hairdressing and beauty appliances, and particularly discloses a heating structure of a wireless hair straightening comb, which comprises heat conduction teeth, a heat conduction toothed plate, a dielectric layer, a resistance heating layer, a conductor layer, an encapsulation layer, an NTC (Negative Temperature Coefficient) conductor layer, an NTC encapsulation layer and a connection relation thereof. The resistance heating layer printed with the thick film is arranged on the back face of the heat conduction toothed plate, intermediate media such as heat conduction silica gel are omitted, and therefore the heat resistance is remarkably reduced, the heat transfer efficiency is improved, the temperature rising speed is increased, the preheating waiting time is shortened, and the use experience feeling is improved; the circuit of the resistance heating layer is divided into two paths of resistors which are connected in parallel, and each path of resistor consists of a multi-branch structure, so that the current and the power of each path of resistor are effectively reduced, the burden of the resistors and conductors is reduced, the service life of the heating resistor is prolonged, and the reliability of a product is improved.

Description

Technical Field

[0001] This utility model relates to the field of beauty and hairdressing tools, and in particular to a heating structure for a wireless hair straightener. Background Technology

[0002] With the rapid development of wireless beauty and hair styling tools, wireless hair straighteners have become widely popular due to their portability and flexibility. However, wireless hair straighteners typically use lithium batteries to achieve their wireless function. Lithium batteries have a relatively low voltage and require a large operating current to meet the needs of rapid heating, which places high demands on the performance of resistors and conductors.

[0003] Currently, most cordless hair straighteners use the MCH heating method, which involves attaching the MCH heating plate to the back of the heat-conducting tooth plate using thermally conductive silicone. This method has the following problems: First, thermal resistance is generated between the thermally conductive silicone and the MCH substrate, affecting heat transfer efficiency; second, the process of applying the thermally conductive silicone increases production costs and time. Furthermore, cordless hair straighteners require a large current to heat up rapidly, placing high demands on the performance of the resistors and conductors, which can easily lead to excessive heating of the resistors and conductors, affecting product lifespan and reliability.

[0004] Chinese patent application number CN202322664724.3 discloses a hair straightening comb. Although its thick film heating uses two conductors to connect multiple resistors in parallel, the resistors and conductors still need to withstand a large current under low voltage and high current operating conditions, which limits the lifespan of the heating resistor and the reliability of the product.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this utility model, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to solve the technical problems existing in the background art. To this end, a heating structure for a wireless hair straightener is provided.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A heating structure for a cordless hair straightener includes a heat-conducting tooth plate. One side of the heat-conducting tooth plate is integrally connected to multiple heat-conducting teeth, which are arranged in multiple rows. Each row of heat-conducting teeth includes at least 13 heat-conducting teeth. The other side of the heat-conducting tooth plate is sequentially connected to a dielectric layer, a resistance heating layer, a conductor layer, and an encapsulation layer from the inside out. The resistance heating layer includes multiple resistors arranged parallel to each other. The conductor layer includes conductor one, conductor two, and conductor three. Conductor one is fixedly connected to one end of the multiple resistors, conductor two is fixedly connected to the middle position of the multiple resistors, and conductor three is fixedly connected to the other end of the multiple resistors.

[0009] The following is a further defined technical solution of this utility model: the heat-conducting tooth has elongated grooves on both sides along its axial direction, the cross-section of the heat-conducting tooth along the direction perpendicular to its axial direction is set as I-shaped, and the tooth surface of the heat-conducting tooth is arc-shaped.

[0010] The following is a further defined technical solution of this utility model: the encapsulation layer is provided with a first connection hole, a second connection hole, and a third connection hole, wherein the first connection hole is adapted to the external end contact point of the first conductor, the second connection hole is adapted to the external end contact point of the second conductor, and the third connection hole is adapted to the external end contact point of the third conductor.

[0011] The following is a further defined technical solution of this utility model: the side of the encapsulation layer away from the conductor layer is connected to the NTC conductor layer and the NTC encapsulation layer in sequence from the inside to the outside.

[0012] The following is a further defined technical solution of this utility model: the NTC conductor layer includes NTC conductor one and NTC conductor two, both ends of NTC conductor one are provided with external terminals, and both ends of NTC conductor two are provided with external terminals.

[0013] The following is a further defined technical solution of this utility model: the NTC encapsulation layer is provided with connection hole four, connection hole five, connection hole six and connection hole seven. Connection hole four is adapted to one end external contact point of NTC conductor one, connection hole five is adapted to the other end external contact point of NTC conductor one, connection hole six is ​​adapted to one end external contact point of NTC conductor two, and connection hole seven is adapted to the other end external contact point of NTC conductor two.

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] 1. This utility model sets a thick film printed resistance heating layer on the back of the heat-conducting tooth plate, eliminating the need for intermediate media such as heat-conducting silicone, thereby significantly reducing thermal resistance, improving heat transfer efficiency, accelerating the heating speed, reducing preheating waiting time, and improving the user experience.

[0016] 2. This utility model divides the circuit of the resistance heating layer into two parallel resistors, and each resistor is composed of a multi-branch structure, which effectively reduces the current and power of each resistor, extends the life of the heating resistor, and improves the reliability of the product.

[0017] 3. This utility model incorporates an NTC conductor layer, a thermistor, and an NTC encapsulation layer on the encapsulation layer, enabling real-time temperature monitoring of the hair straightener and further improving the product's safety and stability.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. 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 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 these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 yes Figure 1 Exploded view of the structure;

[0022] Figure 3 This is a structural schematic diagram from another perspective of the present invention;

[0023] Figure 4 yes Figure 3 Exploded layer diagram of the structure.

[0024] Reference numerals: 1. Thermally conductive toothed plate; 2. Thermally conductive tooth; 201. Long groove; 3. Dielectric layer; 4. Resistance heating layer; 401. Resistor; 5. Conductor layer; 501. Conductor 1; 502. Conductor 2; 503. Conductor 3; 6. Encapsulation layer; 601. Connecting hole 1; 602. Connecting hole 2; 603. Connecting hole 3; 7. NTC conductor layer; 701. NTC conductor 1; 702. NTC conductor 2; 8. NTC encapsulation layer; 801. Connecting hole 4; 802. Connecting hole 5; 803. Connecting hole 6; 804. Connecting hole 7. Detailed Implementation

[0025] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, it should be understood that the terms "a" and "b" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "a" or "b" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0029] like Figure 1-4 As shown, this embodiment provides a heating structure for a wireless hair straightener, mainly composed of heat-conducting teeth 2, heat-conducting tooth plate 1, dielectric layer 3, resistance heating layer 4, conductor layer 5, encapsulation layer 6, NTC conductor layer 7, and NTC encapsulation layer 8. This product aims to optimize the heating speed, battery life, and product reliability of the wireless hair straightener, especially improving the performance of resistance and conductor under low-voltage power supply conditions of lithium batteries.

[0030] like Figure 1 and 3As shown, a plurality of heat-conducting teeth 2 are integrally connected to one side of the heat-conducting tooth plate 1. The plurality of heat-conducting teeth 2 are distributed in multiple rows. In this embodiment, there are 4 rows of heat-conducting tooth 2 groups, and the 4 rows of heat-conducting tooth 2 groups have 13 heat-conducting teeth 2, 14 heat-conducting teeth 2, 14 heat-conducting teeth 2 and 13 heat-conducting teeth 2 respectively. The heat-conducting teeth 2 of the first row of heat-conducting tooth 2 groups (with 13 heat-conducting teeth 2) and the second row of heat-conducting tooth 2 groups (with 14 heat-conducting teeth 2) are staggered. The heat-conducting teeth 2 of the second row of heat-conducting tooth 2 groups (with 14 heat-conducting teeth 2) and the third row of heat-conducting tooth 2 groups (with 14 heat-conducting teeth 2) are symmetrically arranged. The heat-conducting teeth 2 of the third row of heat-conducting tooth 2 groups (with 14 heat-conducting teeth 2) and the fourth row of heat-conducting tooth 2 groups (with 13 heat-conducting teeth 2) are staggered. On the other side of the heat-conducting toothed plate 1, from the inside out, the dielectric layer 3, the resistance heating layer 4, the conductor layer 5, and the encapsulation layer 6 are connected sequentially.

[0031] Heat-conducting tooth plate 1 and heat-conducting tooth 2: used to directly contact and heat the hair. The heat-conducting tooth 2 has elongated grooves 201 on both sides along its axial direction, thereby increasing the contact area with the hair. The cross-section of the heat-conducting tooth 2 along the direction perpendicular to its axial direction is set as I-shaped.

[0032] Dielectric layer 3: This is plate-shaped, also known as a dielectric plate, located on the back of the heat-conducting toothed plate 1. It isolates and protects the resistance heating layer 4 and the conductor layer 5, preventing them from directly contacting the heat-conducting toothed plate 1 and causing short circuits or damage. Dielectric layer 3 is made of a material with good insulation and heat resistance properties. It should be noted that the material of dielectric layer 3 is prior art and not within the scope of this utility model; it is only intended to aid those skilled in the art in understanding the material of dielectric layer 3.

[0033] The resistance heating layer 4 comprises multiple resistors 401 arranged in parallel on the dielectric layer 3, fabricated using thick-film printing technology, and used to generate heat. The resistance heating layer 4 employs two parallel resistors 401, with each resistor 401 consisting of multiple branch resistors connected in parallel to reduce the current and power of each resistor 401. The resistors 401 are made of materials with good heat resistance and stability, such as carbon black, metal oxides, graphene, or conductive polymers. It should be noted that the thick-film printing technology and the materials used for the resistors 401 are existing technologies and are not within the scope of this invention. They are only intended to aid those skilled in the art in understanding the fabrication of the resistance heating layer 4 and the materials used for the resistors 401.

[0034] Conductor layer 5: Located on the resistance heating layer 4, it connects the resistance heating layer 4 and the lithium battery, ensuring smooth current flow. Three conductors are used: conductor one 501, conductor two 502, and conductor three 503. Conductor one 501 is fixedly connected to one end of multiple resistors 401, conductor two 502 is fixedly connected to the middle position of multiple resistors 401, and conductor three 503 is fixedly connected to the other end of multiple resistors 401. This divides the heating thick-film heating circuit into two parallel resistors 401 (i.e., divides the resistance heating layer 4 into two parallel resistors 401). Each resistor 401 consists of a multi-branch resistor 401 structure, which effectively reduces the operating current and power of each resistor 401, lowers the requirements for the conductor material of the resistors 401, and improves the overall reliability of the heater. It should be noted that in this embodiment, conductor layer 5 is used to connect an external DC lithium battery (the positive terminal of the lithium battery is electrically connected to conductor one 501 and conductor three 503, and the negative terminal of the lithium battery is electrically connected to conductor two 502), but it is also adaptable to AC power.

[0035] Encapsulation layer 6: Located on conductor layer 5, it protects the resistance heating layer 4 and conductor layer 5, isolating them from the external environment and preventing damage from oxidation, corrosion, etc. Encapsulation layer 6 is plate-shaped, also known as an encapsulation plate, and has connection holes 601, 602, and 603. Connection hole 601 is adapted to the external end contact of conductor 501, connection hole 602 is adapted to the external end contact of conductor 502, and connection hole 603 is adapted to the external end contact of conductor 503. Therefore, the positive electrode of the external lithium battery is electrically connected to conductor 501 and conductor 503 through connection holes 601 and 603, and the negative electrode of the external lithium battery is electrically connected to conductor 502 through connection hole 602. Encapsulation layer 6 is made by printing and sintering a dielectric material with good heat resistance, insulation, and sealing properties. It should be noted that the above-mentioned matching refers to the same shape and size, that is, the shape and size of the external contact point of the connecting hole 601 and the conductor 501 are the same, and so on; the material of the encapsulation layer 6 is prior art and is not within the protection scope of this utility model, and is only used for those skilled in the art to understand the material of the encapsulation layer 6.

[0036] NTC conductor layer 7 and NTC sensor (thermometer 401): These are disposed on encapsulation layer 6 and used for real-time monitoring of the temperature of resistance heating layer 4. NTC conductor layer 7 is made of an alloy material with good conductivity, such as nickel, manganese, or cobalt alloys. NTC conductor layer 7 includes NTC conductor one 701 and NTC conductor two 702. Both ends of NTC conductor one 701 and NTC conductor two 702 have external terminals. NTC conductor layer 7 is electrically connected to NTC sensor (thermometer 401). Thermometer 401 (not shown in the figure) is disposed on encapsulation layer 6, and its two ends are electrically connected to one end of NTC conductor one 701 and one end of NTC conductor two 702, respectively. The other ends of NTC conductor one 701 and NTC conductor two 702 are electrically connected to an external circuit, thereby detecting the resistance change of NTC sensor (thermometer 401). It should be noted that the use of an NTC sensor (thermometer 401) to detect temperature changes is existing technology, and its detection process is not within the protection scope of this utility model. It is only intended for those skilled in the art to understand the temperature detection process of the thermistor 401.

[0037] NTC Encapsulation Layer 8: This is a board-type enclosure, also known as an NTC encapsulation board. It has four connecting holes 801, 802, 803, and 804. Connecting hole 801 is adapted to one end of the external contact of NTC conductor 701; connecting hole 802 is adapted to the other end of the external contact of NTC conductor 701; connecting hole 803 is adapted to one end of the external contact of NTC conductor 702; and connecting hole 804 is adapted to the other end of the external contact of NTC conductor 702. It should be noted that the above-mentioned adaptation refers to the same shape and size; that is, connecting hole 801 and one end of the external contact of NTC conductor 701 have the same shape and size, and so on.

[0038] In summary, the product of this embodiment features a thick-film printed resistance heating layer 4 on the back of the heat-conducting tooth plate 1, eliminating the need for intermediate media such as thermally conductive silicone, thereby significantly reducing thermal resistance, improving heat transfer efficiency, accelerating heating speed, reducing preheating waiting time, and enhancing the user experience. The circuitry of the resistance heating layer 4 is divided into two parallel resistors 401, each composed of a multi-branch structure, effectively reducing the current and power of each resistor 401, lessening the burden on the resistors and conductors, extending the lifespan of the heating resistors 401, and improving product reliability. Furthermore, the fabrication of an NTC conductor layer 7, a thermistor 401, and an NTC encapsulation layer 8 on the encapsulation layer 6 enables real-time temperature monitoring of the hair straightener, further improving product safety and stability.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the disclosed methods and techniques, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Therefore, all equivalent changes made based on the shape, structure, and principle of this utility model without departing from its technical solution should be covered within the protection scope of this utility model.

Claims

1. A heating structure for a wireless straightening comb, characterized by, The application relates to a heat-conducting toothed plate (1) which is integrally connected with a plurality of heat-conducting teeth (2) on one side, the heat-conducting teeth (2) are arranged in multiple rows, each row of the heat-conducting teeth (2) comprises at least 13 heat-conducting teeth (2), and the other side of the heat-conducting toothed plate (1) is sequentially connected with a medium layer (3), a resistance heating layer (4), a conductor layer (5) and an encapsulating layer (6) from inside to outside, the resistance heating layer (4) comprises a plurality of resistors (401), the resistors (401) are arranged in parallel with each other, the conductor layer (5) comprises a conductor one (501), a conductor two (502) and a conductor three (503), wherein the conductor one (501) is fixedly connected with one end of the plurality of resistors (401), the conductor two (502) is fixedly connected with the middle position of the plurality of resistors (401), and the conductor three (503) is fixedly connected with the other end of the plurality of resistors (401).

2. A heating structure for a wireless straightening comb as defined in claim 1, wherein, The heat-conducting teeth (2) are provided with long groove (201) on both sides along the axial direction, and the cross section of the heat-conducting teeth (2) is provided in an I-shaped mode along the direction perpendicular to the axial direction, and the tooth surface of the heat-conducting teeth (2) is arc-shaped.

3. A heating structure for a wireless straightening comb as defined in claim 1, wherein, The encapsulating layer (6) is provided with a connecting hole one (601), a connecting hole two (602) and a connecting hole three (603), wherein the connecting hole one (601) is matched with the end external connection point of the conductor one (501), the connecting hole two (602) is matched with the end external connection point of the conductor two (502), and the connecting hole three (603) is matched with the end external connection point of the conductor three (503).

4. A heating structure for a wireless straightening comb as defined in claim 1, wherein, The other side of the encapsulating layer (6) away from the conductor layer (5) is sequentially connected with an NTC conductor layer (7) and an NTC encapsulating layer (8) from inside to outside.

5. A heating structure for a wireless straightening comb as defined in claim 4, wherein, The NTC conductor layer (7) comprises an NTC conductor one (701) and an NTC conductor two (702), both ends of the NTC conductor one (701) are provided with external connection points, and both ends of the NTC conductor two (702) are provided with external connection points.

6. A heating structure for a wireless straightening comb as defined in claim 5, wherein, The NTC encapsulating layer (8) is provided with a connecting hole four (801), a connecting hole five (802), a connecting hole six (803) and a connecting hole seven (804), the connecting hole four (801) is matched with the one-end external connection point of the NTC conductor one (701), the connecting hole five (802) is matched with the other-end external connection point of the NTC conductor one (701), the connecting hole six (803) is matched with the one-end external connection point of the NTC conductor two (702), and the connecting hole seven (804) is matched with the other-end external connection point of the NTC conductor two (702).

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