A heating element assembly based on elastic compression structure and a curling iron

Abstract

The application relates to a heating body assembly based on an elastic compression structure and a curling iron. The heating body assembly comprises a hollow aluminum pipe, a glass fiber cloth wrapped outside the aluminum pipe, a stainless steel spring sheet arranged in an axial recess groove on the outer surface of the aluminum pipe, a heat conduction piece arranged in the aluminum pipe, a heating plate and a temperature measuring piece. The spring sheet has a V-shaped movable arm and a fixed arm, is pressed into the recess groove from the front, continuously compresses the glass fiber cloth by elastic deformation, and effectively overcomes the problems of cloth blistering and bulging caused by thermal expansion and cold shrinkage. The structure is simple to assemble, avoids the assembly difficulty, cloth wrinkles or damage caused by the traditional side compression type plastic compression strip, and is suitable for various curling styling occasions.

Description

Technical Field

[0001] This application relates to the field of heating elements and curling irons, and more particularly to a heating element assembly and curling iron based on an elastic compression structure. Background Technology

[0002] Curling irons, as a common hair styling tool, are widely used in various scenarios such as home care, hair salons, and travel. Their core function is to heat and style hair using a heating element, helping users quickly create curls, volume, and other hairstyles. However, most round-tube fabric-wrapped curling irons on the market use plastic strips to press the fabric together (see reference). Figure 1 This common structure reveals several defects in practical use: First, the plastic material is prone to thermal shrinkage during repeated heating and cooling of the heating element, leading to a decrease in the clamping force on the fiberglass cloth. This results in blistering and bulging of the cloth after use, affecting aesthetics and lifespan. Second, the plastic clamping strip often needs to be pressed in from the side, requiring extremely high manufacturing precision and assembly technology—too small an assembly gap will make pressing difficult, while too large a gap will prevent the cloth from being clamped tightly, also causing blistering, wrinkles, or even cloth damage. Furthermore, existing curling irons still have shortcomings in heat transfer efficiency and temperature control precision, potentially causing uneven heating or overheating damage to the hair, affecting the user experience. Therefore, there is an urgent need for a heating element assembly and curling iron with a reasonable structure, simple assembly, good thermal stability, and the ability to reliably fix the cloth over a long period. Utility Model Content

[0003] The technical problem this application aims to solve is that plastic materials are prone to thermal shrinkage during repeated heating and cooling of the heating element, leading to a decrease in the compressive force on the fiberglass cloth and causing problems such as blistering and bulging after use. Secondly, plastic pressure strips often need to be pressed in from the side for assembly; if the assembly gap is too small, it will be difficult to press in, while if the gap is too large, it will not be able to compress the cloth, which will also cause problems such as blistering, wrinkles, and even damage to the cloth surface. To address the above-mentioned deficiencies of the prior art, this application provides a heating element assembly and curling iron based on an elastic compression structure.

[0004] To solve the above-mentioned technical problems, the technical solution adopted in this application is: A heating element assembly based on an elastic compression structure is constructed, comprising a hollow aluminum tube, at least one set of recessed grooves arranged axially on the outer surface of the aluminum tube, a glass fiber cloth covering the outer surface of the aluminum tube, a heat-conducting element disposed inside the aluminum tube, and a heating plate connected to the heat-conducting element. After the heating plate is heated, it transfers heat to the heat-conducting element and then to the aluminum tube through the heat-conducting element. The characteristic feature is that a spring piece is disposed in the recessed groove, the spring piece elastically contacts the side wall of the recessed groove, when the spring piece is inserted into the recess, a contact force is generated between the spring piece and the recess, causing the spring piece to deform, and after insertion, the spring piece returns to its original position and contacts the side wall of the recessed groove, pressing the glass fiber cloth tightly onto the surface of the aluminum tube.

[0005] Preferably, the spring includes two opposing movable arms, one end of which is connected by a fixed arm, and the other end is provided with an opening. When the spring contacts the recessed groove, the open side is first inserted into the recessed groove, and the contact between the movable arm and the recessed groove generates a contact force that causes the movable arm to undergo elastic deformation.

[0006] Preferably, the movable arm has a V-shaped structure with an outward inflection point. The inflection point contacts the recessed groove to generate a contact force, causing the movable arm to undergo elastic deformation.

[0007] Preferably, the recessed groove is provided with inclined side walls on both sides, and the distance between the two inclined side walls gradually decreases from the bottom of the groove to the opening of the groove, so that the cross-section of the recessed groove is trapezoidal. The width of the spring piece at the opening is smaller than the width at the opening of the recessed groove, and the maximum distance between the inflection points on the two movable arms is greater than the width at the opening of the recessed groove, so that the movable arm deforms when the inflection point contacts the opening of the recessed groove.

[0008] Preferably, the heat-conducting components are configured in two groups, symmetrically distributed on both sides of the heating plate, and a temperature measuring component is also provided inside the aluminum tube to detect its internal temperature.

[0009] Preferably, the heat-conducting component includes an arc-shaped heat-conducting arm that fits against the inner wall of the aluminum tube and a clamping portion extending inward from the arc-shaped heat-conducting arm. The clamping portions of the two heat-conducting components together form a clamping area for clamping and fixing the heating plate.

[0010] Preferably, the contour of the clamping area is adapted to the contour of the heating plate, so that the four sides of the heating plate are in contact with the clamping part.

[0011] Preferably, the heat-conducting component is provided with a locking pin, and the heating element assembly further includes a fixing component, which cooperates with the locking pin to fix the temperature measuring component.

[0012] A curling iron is constructed, including a handle, wherein a control plate is disposed within the handle, characterized in that: it further includes a heating element assembly based on an elastic clamping structure as described above, the heating element assembly and the handle are connected by a clamping assembly for clamping hair during curling, and the heating element assembly is electrically connected to the control plate.

[0013] Preferably, the clamping assembly includes a connector connected to the end of the heating element assembly, a clamping plate rotatably connected to the connector via a rotating shaft, and a torsion spring sleeved on the rotating shaft. The clamping plate includes a pressing part for the user to apply force and a clamping part for cooperating with the heating element assembly to clamp the hair. In its natural state, the torsion spring drives the clamping part to close toward the heating element assembly. When the pressing part is pressed, the clamping plate overcomes the spring force of the torsion spring and rotates around the rotating shaft, causing the clamping part to move away from the heating element assembly to open the clamping opening.

[0014] The beneficial effects of this application are as follows: Firstly, the fabric covering is reliably secured. A stainless steel spring is pressed into the axial recessed groove of the aluminum tube from the front, and the elastic deformation of the spring continuously presses the fiberglass cloth, effectively resisting thermal shrinkage after high-temperature heating and cooling, preventing blistering and bulging. Assembly is simpler and more efficient. The spring design has a guiding function, allowing direct pressing from the front without the need for side assembly, reducing assembly difficulty and preventing damage, wrinkling, or breakage of the fiberglass cloth during assembly. The spring is made of SUS304 stainless steel, which is high-temperature resistant, fatigue-resistant, and not easily deformed over long-term use, resulting in a long service life. The heat-conducting component is in close contact with the inner wall of the aluminum tube. Heat from the heating plate is evenly transferred to the aluminum tube through the heat-conducting component, and then to the hair through the fiberglass cloth, resulting in minimal heat loss, uniform heating, and higher heat transfer efficiency. Temperature control is precise. A built-in temperature sensor monitors the temperature in real time, and in conjunction with the control board, intelligent temperature control is achieved to prevent overheating and ensure safe use. The overall structure of the curling iron is reasonable, compact, and easy to use. The clamping components are flexible and suitable for daily curling. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the present application will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a structural diagram showing the connection between the aluminum tube, pressure strip, and fiberglass cloth in a prior art heating element assembly. Figure 2 This is a schematic diagram of the axial structure of a curling iron according to a preferred embodiment of this application; Figure 3 This is a schematic diagram of the axial structure connecting the heating element assembly and the clamping assembly in a preferred embodiment of this application; Figure 4 This is a schematic diagram of the axial structure of the heating element assembly according to a preferred embodiment of this application; Figure 5 This is an exploded view of the heating element assembly according to a preferred embodiment of this application; Figure 6 This is a schematic diagram of the right-side front view of the heating element assembly according to a preferred embodiment of this application; Figure 7 This is a cross-sectional view of the aluminum tube according to a preferred embodiment of this application; Figure 8 This is a schematic diagram of the axial structure of the glass fiber cloth according to a preferred embodiment of this application; Figure 9 This is a cross-sectional view of the spring sheet according to a preferred embodiment of this application; Figure 10This is a schematic diagram of the connection between the heat-conducting component and the fixing component in a preferred embodiment of this application. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this application. Obviously, the described embodiments are some embodiments of this application, but not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application.

[0017] A preferred embodiment of this application includes a heating element assembly and a curling iron based on an elastic compression structure; such as... Figures 2-3 As shown, the device includes a handle 5, a heating element assembly 2, and a clamping assembly 3 connecting the handle and the heating element assembly. The handle contains a control board 6 connected to the heating element assembly, and buttons 4 connected to the control board, allowing adjustment of the heating element assembly's operating mode. A power cord 8, which powers the curling iron, is connected to the end of the handle and is electrically connected to the control board. Covers 7 are located on both sides of the handle, improving grip and featuring anti-slip grooves 70 to increase friction. Since both ends of the heating element are open, one end is sealed by an end cap 1, and the other end by a connector 30, preventing the heating element assembly from protruding. To facilitate curling hair onto the heating element assembly, the clamping assembly 3 holds the hair, and rotating the curling iron rolls the hair onto the heating element assembly. The clamping assembly 3 includes a connector 30 and a clamping plate 31. The clamping plate is rotatably connected to the connector via a pivot 35, and a torsion spring 33 is provided at the connection. The clamping plate includes a pressing part 34 and a clamping part 32. Pressing the pressing part will open the clamping part from the heating element assembly, and the torsion spring will deform under force. When the hair is clamped between the clamping plate and the heating element assembly, the pressure of the pressing part is released, the torsion spring returns to its original position, pushes the clamping part closer to the heating element assembly, and clamps the hair, and then the curling function can be performed.

[0018] Specifically, such as Figures 4-5As shown, the heating element assembly 2 includes a hollow aluminum tube 21, with a fiberglass cloth 23 wrapped around it. The fiberglass cloth is fixed to the outer surface of the aluminum tube by a spring clip 22. Two sets of heat-conducting elements 25 are installed inside the aluminum tube, and a heating plate 20 is positioned between them. Heat generated during heating by the heating plate is transferred to the heat-conducting elements, which then transfer the heat to the aluminum tube, thus enabling the heating element assembly to heat and curl the hair. To facilitate temperature monitoring inside the aluminum tube, a temperature sensor 24 is also installed. Both the temperature sensor and the heating plate are electrically connected to a control board 6. The control board controls the heating temperature of the heating plate, and the temperature sensor transmits the measured temperature to the control board. A monitoring threshold can be set within the control board. When the detected temperature exceeds the set value, the control board stops the heating plate, thus achieving more intelligent heating control.

[0019] Furthermore, such as Figures 6-9 As shown, the aluminum tube 21 has a hollow channel 212 inside, with openings on both sides connecting to the end and connectors. A recessed groove 210 is formed along the axial direction on the outer surface of the aluminum tube, and side inclined walls 211 are formed on both sides of the recessed groove. The distance between the side inclined walls and the openings of the recessed groove is less than the distance to the bottom of the recessed groove. To avoid direct contact between the aluminum tube and hair, causing damage, a fiberglass cloth 23 is wrapped around the aluminum tube. The fiberglass cloth achieves good heat transfer and will not cause damage upon contact with hair. The fiberglass cloth is provided with corresponding side inclined walls 211, making it identical in shape to the aluminum tube, while a gap 230 is left between the side inclined walls. To ensure the fiberglass cloth adheres tightly to the surface of the aluminum tube, a spring clip 22 is installed within the recessed groove. The spring clip is made of SUS304 stainless steel and includes two sets of opposing movable arms 220. One end of each movable arm is connected by a fixed arm 223, and the other end has an opening 222, allowing relative movement between the movable arms. The movable arm 220 is V-shaped with an inflection point 221. When connecting the movable arm to the aluminum tube, the side with the opening 222 is inserted into the gap first, and the distance between the two inflection points should be large. The width of the recessed groove, and the width of the opening 222, can be set smaller than the width of the groove opening, facilitating the opening to enter the recessed groove. When the inflection point contacts the side inclined wall, the moving arm is pushed to move in opposite directions, reducing the distance between the inflection points, allowing the spring to enter the recessed groove. After entering, because the spring is an elastic element, the moving arm will move backward and make close contact with the side inclined wall, thereby pressing the fiberglass cloth tightly. This effectively avoids the impact caused by the high temperature heating and shrinkage after cooling of the curling iron, making it heat-resistant and impact-resistant, and the cloth wrapping is not prone to bubbling. At the same time, because the recessed groove is set along the axial direction of the aluminum tube, it is easier to insert the spring. The guiding action of the moving arm allows for simple and quick pressing from the front, simplifying assembly and avoiding damage to the fiberglass cloth during assembly. Because the stainless steel spring has good deformation, the assembly gap can be widened to still press the cloth tightly.

[0020] Furthermore, such as Figures 5-6 and Figure 10 As shown, the heat-conducting component 25 includes an arc-shaped heat-conducting arm 250, which is in close contact with the inner wall of the aluminum tube. The heat-conducting component also has clamping parts 251, forming a clamping area 252 between the clamping parts. The heating plate is placed within the clamping area, which is half the volume of the heating plate. Therefore, the two sets of clamping areas ensure that the heating plate is in contact with the heat-conducting component on all sides, achieving better heat transfer. The heat is then transferred from the heat-conducting component to the arc-shaped heat-conducting arm and then to the aluminum tube, resulting in more efficient heat transfer and avoiding heat loss. Two sets of clamping feet 252 are provided inside the heat-conducting component. A fixing member 26 is placed inside the clamping feet and fixes the temperature measuring element to detect the temperature of the heat-conducting component. It should be noted that there may be a certain temperature difference between the temperature measured by the temperature measuring element of the heat-conducting component and the temperature of the aluminum tube. The control board can perform a certain temperature difference compensation to control the operation of the heating plate. The specific temperature difference compensation method is determined by the control board and is not described in detail here, nor is it within the scope of protection of this application.

[0021] It should be understood that this application has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this application. Furthermore, based on the teachings of this application, these features and embodiments can be modified to suit specific circumstances and materials without departing from the spirit and scope of this application. Therefore, this application is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this application.

Claims

1. A heating element assembly based on an elastic compression structure, comprising a hollow aluminum tube, wherein at least one set of recessed grooves are provided axially on the outer surface of the aluminum tube, the outer surface of the aluminum tube is covered with fiberglass cloth, a heat-conducting element is disposed inside the aluminum tube, and a heating plate connected to the heat-conducting element is disposed therein, wherein the heating plate, after heating, transfers heat to the heat-conducting element and then to the aluminum tube through the heat-conducting element, characterized in that: A spring sheet is provided in the recessed groove. The spring sheet is in elastic contact with the side wall of the recessed groove. When the spring sheet is inserted into the recess, a contact force is generated between the spring sheet and the recess, causing the spring sheet to deform. After insertion, the spring sheet returns to its original position and contacts the side wall of the recessed groove, pressing the fiberglass cloth tightly onto the surface of the aluminum tube.

2. The heating element assembly according to claim 1, characterized in that: The spring includes two opposing movable arms. One end of the two movable arms is connected by a fixed arm, and the other end is provided with an opening. When the spring contacts the recessed groove, the open side is first inserted into the recessed groove, and the contact between the movable arm and the recessed groove generates a contact force that causes the movable arm to undergo elastic deformation.

3. The heating element assembly according to claim 2, characterized in that: The movable arm has a V-shaped structure with an outward inflection point. The inflection point contacts the recessed groove to generate a contact force, causing the movable arm to undergo elastic deformation.

4. The heating element assembly according to claim 3, characterized in that: The recessed groove has inclined walls on both sides, and the distance between the inclined walls gradually decreases from the bottom of the groove to the opening, making the cross-section of the recessed groove trapezoidal. The width of the spring piece at the opening is smaller than the width at the opening of the recessed groove, and the maximum distance between the inflection points of the two movable arms is greater than the width at the opening of the recessed groove, so that the movable arms deform when the inflection points come into contact with the opening of the recessed groove.

5. The heating element assembly according to any one of claims 1-4, characterized in that: The heat-conducting components are configured in two groups, symmetrically distributed on both sides of the heating plate. A temperature measuring component is also installed inside the aluminum tube to detect its internal temperature.

6. The heating element assembly according to claim 5, characterized in that: The heat-conducting component includes an arc-shaped heat-conducting arm that fits against the inner wall of the aluminum tube and a clamping portion extending inward from the arc-shaped heat-conducting arm. The clamping portions of the two heat-conducting components together form a clamping area for clamping and fixing the heating plate.

7. The heating element assembly according to claim 6, characterized in that: The outline of the clamping area is adapted to the outline of the heating plate, so that the four sides of the heating plate are in contact with the clamping part.

8. The heating element assembly according to claim 5, characterized in that: The heat-conducting component is provided with a locking pin, and the heating element assembly also includes a fixing component, which cooperates with the locking pin to fix the temperature measuring component.

9. A curling iron, comprising a handle, wherein a control panel is disposed within the handle, characterized in that: It also includes a heating element assembly based on an elastic clamping structure as described in any one of claims 1-8, wherein the heating element assembly and the handle are connected by a clamping assembly for clamping hair during curling, and the heating element assembly is electrically connected to a control board.

10. The curling iron according to claim 9, characterized in that: The clamping assembly includes a connector connected to the end of the heating element assembly, a clamping plate rotatably connected to the connector via a rotating shaft, and a torsion spring sleeved on the rotating shaft. The clamping plate includes a pressing part for the user to apply force and a clamping part for cooperating with the heating element assembly to clamp the hair. In its natural state, the torsion spring drives the clamping part to close toward the heating element assembly. When the pressing part is pressed, the clamping plate overcomes the spring force of the torsion spring and rotates around the rotating shaft, causing the clamping part to move away from the heating element assembly to open the clamping opening.

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