Electric heating knife

Abstract

The utility model relates to the technical field of heating cutting, and discloses an electric heating knife which comprises a heating piece and an electric shock piece which are integrally formed. The cutting sheet is fixedly connected with two opposite end surfaces of the heating sheet, and a contact hole corresponding to the electric shock sheet is formed in the cutting sheet; wherein the cutting piece comprises an insulating film and a heat conducting piece which are arranged in a stacked mode, the insulating film is fixedly connected with the heating piece, the heat conducting piece is arranged on the peripheral side, away from the heating piece, of the insulating film, and a cutting edge is arranged on the folding edge of the heat conducting piece; the insulating film is arranged on the inner side of the cutting blade, so that current cannot directly contact with the heat-conducting sheet to cause electric leakage or short circuit, and the cutting blade is formed by folding and can be tightly attached to the two surfaces of the heating sheet, so that heat of the heating sheet can be efficiently absorbed and uniformly transmitted to each part of the cutting blade, the overall temperature of the electric heating knife is kept stable, and the service life of the electric heating knife is prolonged. Smoother cutting edges are achieved, the cutting flatness is improved, and burrs and irregular edges are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heating and cutting, in particular to an electric heating knife. Background Art

[0002] As a common industrial and medical tool, electric knives are widely used for cutting, dividing, and trimming various materials. Electric knives convert electrical energy into heat, allowing the blade to reach a high temperature, making it easy to cut hot-melt materials such as plastics, foam, fiber, and cloth. They are even used for tissue cutting during surgery. With the advancement of technology, the application areas of electric knives are constantly expanding, and performance requirements are becoming increasingly stringent. This is especially true in the industrial manufacturing and medical equipment sectors, where the market places higher demands on the accuracy, stability, and safety of electric knives.

[0003] Most of the electric heating knives currently used in the market use resistance materials such as heating wires or heating plates as heating devices, and transfer heat energy to the blade through heat conduction to make the blade reach the required working temperature. However, the heating wire needs to be close to or wrapped around the blade, and the heating plate is usually integrated into the back of the blade. The heating efficiency of the heating wire and heating plate in the above heating method is limited by the contact area with the blade and the heat-conducting medium. Therefore, there are obvious deficiencies in heating uniformity. The electric heating knife is prone to unstable cutting during the cutting process, resulting in uneven incisions and burrs on the edge of the material, which in turn affects the appearance quality of the product and the compatibility of the workpiece in industrial applications.

[0004] Therefore, it is necessary to provide an electric heating knife to solve the problem of poor heating uniformity of the electric heating knife. Utility Model Content

[0005] The purpose of the present invention is to provide an electric heating knife to solve the technical problems mentioned in the background technology.

[0006] The utility model adopts the following technical solutions:

[0007] An electric hot knife, comprising:

[0008] A heating sheet and electric shock sheets arranged at both ends of the heating sheet, wherein the electric shock sheets are integrally formed with the heating sheet;

[0009] A folded cutting sheet, the cutting sheet being fixedly connected to two opposite end surfaces of the heating sheet, and the cutting sheet being provided with contact holes corresponding to the electric contact sheets;

[0010] The cutting sheet comprises an insulating film and a heat conducting sheet stacked together, the insulating film is fixedly connected to the heating sheet, the heat conducting sheet is arranged on the peripheral side of the insulating film away from the heating sheet, and the folded edge of the heat conducting sheet is arranged as a cutting blade.

[0011] Furthermore, the cutting sheet is provided with a positioning notch, and the positioning notch extends along a side away from the electric shock sheet to the cutting blade.

[0012] Furthermore, the heating sheet is a serpentine heating sheet, the two ends of the serpentine heating sheet are arranged on the same side, the electric shock sheet is fixedly connected to the end of the serpentine heating sheet, and the electric shock sheet has the same thickness as the serpentine heating sheet.

[0013] Furthermore, the heating sheet is a silver heating sheet, and the thickness of the heating sheet is 40-50 microns.

[0014] Furthermore, the electric shock sheet is a silver electric shock sheet, and the thickness of the electric shock sheet is 40-50 microns.

[0015] Furthermore, the resistance value of the heating sheet is 8-10 ohms.

[0016] Furthermore, the insulating film is a polyimide film, and the thickness of the insulating film is 1 mil.

[0017] Furthermore, the heat conducting sheet is a copper sheet, and the thickness of the heat conducting sheet is 70 microns.

[0018] Beneficial effects:

[0019] The utility model provides an electric heating knife, in which the electric contact sheet and the heating sheet are integrally formed, an insulating film is provided on the inner side of the cutting sheet, and a contact hole is opened corresponding to the electric contact sheet, so that the current can safely pass through the electric contact sheet and the heating sheet to stably generate heat without directly contacting the heat conducting sheet to cause leakage or short circuit. The cutting sheet is folded and can fit tightly on both sides of the heating sheet, so that it can efficiently absorb the heat of the heating sheet and evenly transfer it to various parts of the cutting sheet, so that the overall temperature of the electric heating knife remains stable, a smoother cutting edge is achieved, the flatness of the cutting is improved, and the generation of burrs and irregular edges is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of an electric heating knife of the present utility model;

[0021] Figure 2 This is a schematic diagram of the heating element structure of an electric heating knife in the utility model;

[0022] Figure 3 This is a partial cross-sectional schematic diagram of an electric hot knife of the present utility model;

[0023] Among them: 1. heating sheet; 2. electric shock sheet; 3. cutting sheet; 301. contact hole; 302. insulating film; 303. thermal conductive sheet; 304. cutting blade; 305. positioning notch.

[0024] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "several" means two or more, unless otherwise clearly and specifically defined.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] Reference Figures 1 to 3The utility model proposes an electric heating knife, comprising: a heating plate 1 and electric shock plates 2 arranged at both ends of the heating plate 1, wherein the electric shock plates 2 are integrally formed with the heating plate 1;

[0030] A folded cutting sheet 3, the cutting sheet 3 is fixedly connected to the two opposite end surfaces of the heating sheet 1, and the cutting sheet 3 is provided with a contact hole 301 corresponding to the electric contact sheet 2;

[0031] Among them, the cutting sheet 3 includes a stacked insulating film 302 and a thermal conductive sheet 303, the insulating film 302 is fixedly connected to the heating sheet 1, the thermal conductive sheet 303 is arranged on the peripheral side of the insulating film 302 away from the heating sheet 1, and the folded edge of the thermal conductive sheet 303 is set as a cutting blade 304.

[0032] In the above embodiment, the folded edge of the cutting blade 3 serves as the cutting blade 304 and can be set to have a sharp blade so as to enhance the effect of the electric knife and make cutting easier. The material selected for the thermal conductive sheet 303 should have good thermal conductivity to ensure that the heat generated by the heating sheet 1 can be effectively transferred to the cutting blade 3, thereby achieving a fast and uniform cutting effect. The function of the insulating film 302 is to prevent the current from passing directly through the thermal conductive sheet 303 to ensure the safety of the user's electricity use. In addition, the electric shock sheet 2 is integrally formed with the heating sheet 1, and is integrally formed by melting the same metal during production, which enhances the stability and durability of the structure.

[0033] Furthermore, there is no need to set up additional threaded fixing holes on the electric hot knife in the utility model. By unifying its shape, thickness, and the thickness of the electric contact plate 2, the blade can be quickly plugged in and replaced, which is suitable for frequent replacement of the electric hot knife in high-temperature working scenarios.

[0034] In summary, the electric shock sheet 2 and the heating sheet 1 are integrally formed, an insulating film 302 is provided on the inner side of the cutting sheet 3, and a contact hole 301 is opened corresponding to the electric shock sheet 2, so that the current can safely pass through the electric shock sheet 2 and the heating sheet 1 to stably generate heat without directly contacting the thermal conductive sheet 303 to cause leakage or short circuit. The cutting sheet 3 is folded and can fit tightly on both sides of the heating sheet 1, so that it can efficiently absorb the heat of the heating sheet 1 and evenly transfer it to various parts of the cutting sheet 3, so that the overall temperature of the electric heating knife remains stable, a smoother cutting edge is achieved, the flatness of the cutting is improved, and the generation of burrs and irregular edges is reduced. The overall design takes into account the convenience of operation and the safety of use, making the electric heating knife both efficient and safe during use.

[0035] In one embodiment, the cutting blade 3 is provided with a positioning notch 305 , and the positioning notch 305 extends along a side away from the electric shock blade 2 to the cutting edge 304 .

[0036] In the above embodiment, the positioning notch 305 of the cutting blade 3 allows the cutting blade 3 to be accurately positioned during installation, preventing time-consuming adjustments during reverse installation of the entire electric heating knife. Furthermore, it prevents the contact plate 2 from failing to contact and conduct electricity with the external electric heating knife body. This not only improves installation convenience but also enhances the heat conduction efficiency between the cutting blade 3 and the heating plate 1, further ensuring the temperature stability and cutting effect of the electric heating knife during operation. Furthermore, the design of the positioning notch 305 helps prevent displacement of the cutting blade 3 due to thermal expansion in high-temperature operating environments, thereby ensuring cutting accuracy and repeatability.

[0037] In one embodiment, the heating sheet 1 is a serpentine heating sheet, the two ends of the serpentine heating sheet are arranged on the same side, the electric shock sheet 2 is fixedly connected to the end of the serpentine heating sheet, and the electric shock sheet 2 has the same thickness as the serpentine heating sheet.

[0038] In the above embodiment, the serpentine heating sheet enables it to form a uniform heat distribution during operation, thereby ensuring temperature consistency at the cutting edge. This not only improves cutting efficiency, but also reduces material deformation or burning caused by uneven temperature. In addition, since the two ends of the serpentine heating sheet are arranged on the same side, the connection between the heating sheet 1 and the electric shock sheet 2 is easier, and the difficulty of operation during installation and maintenance is also reduced accordingly. That is, during installation, the conductive parts can be arranged on the same side, which improves the overall performance of the electric hot knife and provides users with a more convenient user experience.

[0039] In one embodiment, the heating sheet 1 is a silver heating sheet with a thickness of 40-50 microns. The electric shock sheet 2 is a silver electric shock sheet with a thickness of 40-50 microns. The electric shock sheet 2 has the same thickness as the serpentine heating sheet.

[0040] In the above embodiment, the heating sheet 1 and the electric shock sheet 2 are printed and integrally formed using silver paste during production, so their thickness is consistent. Silver material has good electrical conductivity and high temperature resistance, which enables the silver heating sheet 1 and the electric shock sheet 2 to maintain stable performance in a high-temperature working environment and reduce failures caused by material fatigue. In addition, the thickness of the silver heating sheet 1 and the electric shock sheet 2 is controlled at 40-50 microns, which not only ensures the heat transfer efficiency of the heating sheet 1, but also avoids uneven heat distribution caused by excessive thickness. In practical applications, it helps to achieve more precise temperature control, thereby improving cutting quality and repeatability.

[0041] In one embodiment, the resistance of the heating sheet 1 is 8-10 ohms.

[0042] In the above embodiment, the resistance value of the heating plate 1 is set to 8-10 ohms to ensure that sufficient heat can be generated for cutting during operation, while not causing excessive current due to too low resistance, which will affect the service life of the heating plate 1.

[0043] In one embodiment, the insulating film 302 is a polyimide film, and the thickness of the insulating film 302 is 1 mil.

[0044] In the above embodiment, the selection of insulating film 302 takes into account not only its insulation performance but also its high-temperature resistance and mechanical strength. Polyimide film is used as a high-performance insulating material. It maintains stable physical and chemical properties in high-temperature environments, is resistant to aging, and possesses excellent mechanical strength, capable of withstanding the thermal and mechanical stresses generated by the hot knife during operation. Furthermore, a thickness of 1 mil ensures the insulating effectiveness of insulating film 302 without significantly affecting the overall thickness of the hot knife, thereby maintaining the lightweight and portable nature of the hot knife.

[0045] In one embodiment, the heat conducting sheet 303 is a copper sheet, and the thickness of the heat conducting sheet 303 is 70 microns.

[0046] In the above embodiment, copper is used for heat conducting sheet 303 because copper has excellent thermal conductivity, enabling it to quickly and evenly transfer the heat generated by heating sheet 1 to the cutting area, thereby improving cutting efficiency. Furthermore, the copper sheet is 70 microns thick, ensuring that heat conducting sheet 303 maintains excellent thermal conductivity without significantly increasing the overall size of the electric knife, thus maintaining the device's compact design. Furthermore, the copper sheet has excellent machinability, facilitating precise alignment with other components of the electric knife, ensuring the stability and reliability of the device during use.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electric hot knife, characterized in that: include: A heating sheet (1) and electric shock sheets (2) arranged at both ends of the heating sheet (1), wherein the electric shock sheets (2) and the heating sheet (1) are integrally formed; A folded cutting sheet (3), the cutting sheet (3) being fixedly connected to two opposite end faces of the heating sheet (1), the cutting sheet (3) being provided with a contact hole (301) corresponding to the electric contact sheet (2); The cutting sheet (3) comprises an insulating film (302) and a heat conducting sheet (303) which are stacked together, the insulating film (302) is fixedly connected to the heating sheet (1), the heat conducting sheet (303) is arranged on the peripheral side of the insulating film (302) away from the heating sheet (1), and the folded edge of the heat conducting sheet (303) is arranged as a cutting blade (304).

2. The electric hot knife according to claim 1, characterized in that: The cutting blade (3) is provided with a positioning notch (305), and the positioning notch (305) extends along a side away from the electric shock blade (2) to the cutting blade (304).

3. The electric hot knife according to claim 1, characterized in that: The heating sheet (1) is a serpentine heating sheet, the two ends of which are arranged on the same side, the electric shock sheet (2) is fixedly connected to the ends of the serpentine heating sheet, and the electric shock sheet (2) has the same thickness as the serpentine heating sheet.

4. The electric hot knife according to claim 1, characterized in that: The heating sheet (1) is a silver heating sheet, and the thickness of the heating sheet (1) is 40-50 microns.

5. The electric hot knife according to claim 1, characterized in that: The electric shock sheet (2) is a silver electric shock sheet, and the thickness of the electric shock sheet (2) is 40-50 microns.

6. The electric hot knife according to claim 1, characterized in that: The resistance value of the heating plate (1) is 8-10 ohms.

7. The electric hot knife according to claim 1, characterized in that: The insulating film (302) is a polyimide film, and the thickness of the insulating film (302) is 1 mil.

8. The electric hot knife according to claim 1, characterized in that: The heat conducting sheet (303) is a copper sheet, and the thickness of the heat conducting sheet (303) is 70 microns.

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