Hot melting cutter

Abstract

The utility model relates to the technical field of hot melting cutters, in particular to a hot melting cutter. The hot melting cutter comprises a shell and a conductive part at least partially located in the shell. An accommodating space is formed in the shell; the pressure relief gap is communicated with the outside; the pressure relief gap is positioned on at least one of the shell, the conductive part and the shell and the conductive part; the pressure relief gap is provided with a channel extending from the containing space to the outer side of the shell. And the longitudinal sectional area of the pressure relief gap on one side closest to the accommodating space is larger than that of the pressure relief gap on the outer side closest to the shell. Through the arrangement, the pressure release speed can be reduced, impact and vibration caused by too high flow speed can be avoided, the pressure release process can be better controlled, moisture and water vapor entering is effectively reduced, corrosion and oxidation of internal elements of the hot melting cutter are avoided, the performance of the hot melting cutter is improved, and the service life of the hot melting cutter is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit protection technical field, especially relates to a hot melt disconnector. BACKGROUND

[0002] The hot melt disconnector is a kind of over-temperature protection component, usually used as secondary protection, so that it can act in time when suffering over-current risk and over-charging risk, to protect circuit.The conventional hot melt disconnector is built-in fusible conductor, when the temperature of heating element is transmitted to fusible conductor and reaches its melting point, the fusible conductor is quickly shrunk to both sides of electrode under the help of surface tension of fluxing agent, so that the circuit is cut off.

[0003] At present, the hot melt disconnector on the market is provided with larger exhaust port at shell, the purpose is that when breaking material, internal gas can be smoothly discharged, the cut-off force caused by gas expansion is avoided, and the cutting effect is influenced.However, the larger exhaust port design is easy to cause the entry of moisture and water vapor, and then corrode and oxidize the internal components of hot melt disconnector, and affect the performance of product;And the smaller exhaust port design is easy to cause insufficient pressure relief. SUMMARY

[0004] The utility model provides a kind of hot melt disconnector, can solve at least one problem in the background art to improve the performance of hot melt disconnector.

[0005] In the first aspect, the utility model embodiment provides a kind of hot melt disconnector, comprising: shell and at least part of the conductive component in the shell;The shell is formed with accommodating space inside;Further comprising pressure relief gap, the pressure relief gap is located on at least one of the shell, the conductive component, the shell and the conductive component between;

[0006] The pressure relief gap has the channel extending from the accommodating space to the outside of the shell;The longitudinal section area of the pressure relief gap at the side closest to the accommodating space is greater than the longitudinal section area of the pressure relief gap at the side closest to the outside of the shell.

[0007] In some embodiments, the longitudinal section area of the pressure relief gap changes at least one of linearly decreasing, non-linearly decreasing from the side close to the accommodating space to the side close to the outside of the shell.

[0008] In some embodiments, the height of the pressure relief gap is less than or equal to 0.2mm.

[0009] In some embodiments, the longitudinal section shape of at least part of the channel side wall of the pressure relief gap from the side close to the accommodating space to the side close to the outer surface of the shell is at least one of wave-shaped, sawtooth-shaped, arc-shaped and straight-line-shaped.

[0010] In some embodiments, the housing has sidewalls; the pressure relief gap is located in the middle of the housing sidewalls and / or in the middle of the conductive component along its width direction.

[0011] In some embodiments, the housing has a plurality of protrusions that contact the conductive component on the side near the conductive component; the protrusions are located at the corners of the bottom of the housing, and the pressure relief gap is formed between two protrusions at adjacent corners of the bottom of the housing.

[0012] In some embodiments, the conductive component includes a first main electrode, a second main electrode, and a fusible conductor; the fusible conductor is electrically connected to the first main electrode and the second main electrode, respectively, and the fusible conductor is located within the accommodating space; the pressure relief gap is located on at least one of the first main electrode, the second main electrode, and the housing.

[0013] In some embodiments, the heating element includes a heating substrate and a heating electrode located on the heating substrate; the heating electrode is in contact with the fusible conductor.

[0014] In some embodiments, an encapsulating adhesive layer is formed between the housing and the heating element, the encapsulating adhesive layer is located at the corner of the bottom of the housing, and the pressure relief gap is formed between two encapsulating adhesive layers at adjacent corners of the bottom of the housing.

[0015] In some embodiments, the accommodating space further includes a fluxing agent located within the accommodating space, the fluxing agent being in close contact with a portion of the conductive component; the housing has a limiting block formed on the surface facing the fluxing agent; when the housing is connected to the conductive component, the limiting block within the accommodating space abuts against the fluxing agent.

[0016] The thermoplastic cutter provided by this utility model, through the structural design of the pressure relief gap, can not only slow down the pressure release speed and better control the pressure relief process, but also limit the fluid flow rate to avoid impact and vibration caused by excessive flow rate, making the pressure relief process more stable; at the same time, it can also effectively reduce the entry of moisture and water vapor, avoid corrosion and oxidation of the internal components of the thermoplastic cutter, and improve the performance and service life of the thermoplastic cutter.

[0017] Other features and beneficial effects of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing this invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A perspective view of a thermoplastic cutter provided in an embodiment of the present invention;

[0020] Figure 2 A perspective view of a thermoplastic cutter provided in another embodiment of the present invention;

[0021] Figure 3 An exploded perspective view of a thermoplastic cutter provided in an embodiment of this utility model;

[0022] Figure 4 An exploded perspective view of a thermoforming cutter provided in one embodiment of the present invention;

[0023] Figure 5 This is a three-dimensional view of the shell;

[0024] Figures 6-9 Bottom views of different deformed shell examples;

[0025] Figure 10 A perspective view of another modified example of the shell;

[0026] Figure 11 A front view of a thermoplastic cutter provided in an embodiment of this utility model;

[0027] Figure 12 for Figure 11 Sectional view of AA;

[0028] Figures 13-16 for Figure 12 Different variations of the enlarged local view;

[0029] Figure 17 Exploded perspective view of the thermoplastic cutter provided in other embodiments of this utility model;

[0030] Figure 18 A front view of a thermoplastic cutter provided for other embodiments of this utility model;

[0031] Figure 19 A front view of a thermoplastic cutter provided for other embodiments of this utility model.

[0032] Figure label:

[0033] 10-Housing; 11-Boss; 12-Limiting block; 20-Conductive component; 21-First main electrode; 22-Second main electrode; 23-Fuseable conductor; 40-Fuse flux; 50-Heating element; 51-Heating substrate; 52-Heating electrode; 30-Pressure relief gap; 60-Encapsulating adhesive layer. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The technical features designed in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0035] In the description of this utility model, it should be noted that all terms used in this utility model (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model pertains, and should not be construed as limiting this utility model; it should be further understood that the terms used in this utility model should be understood to have the same meaning as those in the context of this specification and in the relevant field, and should not be understood in an idealized or overly formal sense, except as expressly defined in this utility model.

[0036] Example 1

[0037] Please see Figures 1-4 The present invention provides a thermoplastic cutter, which includes a housing 10 and a conductive component 20 located at least partially within the housing 10; wherein the conductive component 20 preferably includes a first main electrode 21, a second main electrode 22, and a fusible conductor 23.

[0038] The material of the shell 10 includes, but is not limited to, insulating materials such as plastics or ceramics. The structural shape of the shell 10 can be reasonably designed according to actual needs, and this embodiment is not limited thereto. By preferably using engineering plastics or thermosetting materials as the outer shell, the shell has better temperature resistance.

[0039] The first main electrode 21 and the second main electrode 22 are made of materials with good conductivity, and can be in the form of wire, sheet or irregular shape.

[0040] In this embodiment, an accommodating space is formed inside the housing 10, and the fusible conductor 23 is located within the accommodating space. The first main electrode 21 is electrically connected to the second main electrode 22 through the fusible conductor 23, so that a conductive circuit is formed between the first main electrode 21 and the second main electrode 22 through the fusible conductor 23.

[0041] The fusible conductor 23 is made of a low-melting-point alloy to ensure that it will rapidly heat up and melt under the action of a preset overload current due to its own thermal effect, thereby breaking the conductive circuit and protecting the circuit. The structure of the fusible conductor 23 can be a rectangular block or an irregularly shaped block. As an example, the material of the fusible conductor 23 includes, but is not limited to, metals such as indium, bismuth, antimony, and tin, and their alloys.

[0042] Optionally, in this embodiment, the hot melt cutter further includes a heating element 50, which includes a heating substrate 51 and a heating electrode 52 located on the heating substrate 51; the heating electrode 52 is in contact with the fusible conductor 23; the first main electrode 21 and the second main electrode 22 are respectively located on opposite sides of the heating substrate 51.

[0043] The heating substrate 51 is made of a high-temperature resistant material, such as ceramic, to improve the electrical insulation strength between the two main electrodes after breakage. Heating wires may be arranged inside the heating substrate 51, and these wires are connected to the heating electrode 52. The heating electrode 52 is typically made of a conductive and high-temperature resistant material, such as a nickel-chromium alloy. The heating electrode 52 is located in the middle of the heating substrate 51 and is in contact with the fusible conductor 23, ensuring that the heat generated by the heating element 50 can be effectively transferred to the fusible conductor 23, thereby accelerating the melting process of the fusible conductor 23 under overcurrent conditions.

[0044] The thermoforming cutter also includes a fluxing agent 40, which is formed in the accommodating space by coating or spraying and covers the fusible conductor 23. The fluxing agent 40 is designed to facilitate the melting of the fusible conductor 23, promoting its retraction towards the first main electrode 21 and the second main electrode 22, thereby improving the efficiency of cutting off the conductive circuit. The material and structure of the fluxing agent 40 can be any existing product capable of achieving the fluxing effect, and are not limited here.

[0045] Preferably, the housing 10 has a limiting block 12 formed on its surface facing the flux 40; when the housing 10 is connected and assembled with the conductive component 20, the limiting block 12 in the accommodating space abuts against the flux 40. The design of the limiting block 12 effectively prevents the flux 40 from accidentally moving due to vibration or other external forces during the operation of the hot melt cutter. In this embodiment, the limiting block 12 is provided with multiple arc-shaped grooves, which helps to accommodate the molten flux 40. Its size and shape are rationally designed according to the structure of the flux 40, but this embodiment is not limited thereto.

[0046] Furthermore, to address the shortcomings of existing exhaust port designs, this embodiment features a rationally designed pressure relief gap 30 to effectively improve pressure relief performance. The pressure relief gap 30, which communicates with the outside, has a channel extending from the accommodating space to the outside of the housing 10. The design of the pressure relief gap 30 is to provide a pressure release channel when the internal pressure of the housing 10 exceeds a safe value, thereby preventing the housing 10 from rupturing or being damaged. In this embodiment, the pressure relief gap 30 is located on at least one of the housing 10, the conductive component 20, or between the housing 10 and the conductive component 20. Specifically, the pressure relief gap 30 can be formed in any convenient pressure relief area on the housing 10 near the conductive component 20. The pressure relief gap 30 can also be formed on the conductive component 20 at any position (not shown in the figure) that allows communication with the outside, spanning the outer and inner walls of the housing 10. For example, the pressure relief gap 30 can be formed on the first main electrode or the second main electrode at the junction with the housing 10. The pressure relief gap 30 can also be formed between the housing 10 and the conductive component 20. For example, the housing 10 and the conductive component have corresponding grooves (not shown in the figure), and the grooves on the housing 10 and the conductive component together form the pressure relief gap 30. Alternatively, an insulating gasket, such as an encapsulating adhesive layer, can be added between the housing 10 and the conductive component, and the gap formed between the opposing surfaces of the housing 10 and the conductive component is the pressure relief gap 30. The specific location and number of pressure relief gaps 30 can be reasonably designed according to actual needs.

[0047] Specifically, the longitudinal cross-sectional area of ​​the pressure relief gap 30 closest to the accommodating space is larger than the longitudinal cross-sectional area of ​​the pressure relief gap 30 closest to the outer surface of the housing 10. That is, the opening of the pressure relief gap 30 near the accommodating space is larger than the opening of the pressure relief gap 30 near the outer surface of the housing 10. The shape and structure of the pressure relief gap 30 can be determined according to requirements. Through the above design, when the gas flows from the inside of the housing 10 to the outside, the pressure decreases from the inside to the outside, slowing down the pressure release rate, thereby better controlling the pressure relief process. At the same time, the smaller longitudinal cross-sectional area of ​​the pressure relief gap 30 located on the outer surface of the housing 10 not only limits the fluid flow rate, avoiding impact and vibration caused by excessive flow velocity, making the pressure relief process smoother, but also reduces the corrosion and oxidation of the internal components of the housing 10 by moisture and water vapor entering. In this embodiment, "longitudinal cross-sectional area" refers to the cross-sectional area perpendicular to the extension channel of the pressure relief gap 30.

[0048] Preferably, such as Figure 5 As shown, the longitudinal cross-sectional area of ​​the pressure relief gap 30 changes in at least one of linear and nonlinear decreasing patterns from the side closest to the accommodating space towards the outside of the housing 10. Nonlinear decreasing can include gradient, discrete, exponential, polynomial, or piecewise jump decreasing patterns. As an example, the shape of the pressure relief gap 30 can be trumpet-shaped, stepped, or other shapes composed of planes and / or curved surfaces. For example... Figure 6 , Figure 8 For nonlinear reduction, Figure 7 To decrease linearly, Figure 9 To reduce the gradient, this embodiment preferably uses an axisymmetric shape for the pressure relief gap 30 to ensure uniform pressure relief and improve the pressure relief effect. It should be noted that, according to this concept, the shape and structure corresponding to the reduction of the longitudinal cross-sectional area of ​​the pressure relief gap 30 are not limited to the attached... Figures 6-9 As shown, its corresponding variations and improvements all fall within the protection scope of this utility model.

[0049] Traditional pressure relief ports typically have a height of 0.4 mm or more. While a larger port height improves pressure relief, it also allows external moisture and water vapor to more easily enter the thermoelectric cutter, potentially corroding and oxidizing internal components. Therefore, in this embodiment, by designing different pressure relief port cross-sectional areas to improve pressure relief, the height of the pressure relief gap 30 is further limited to less than or equal to 0.2 mm. This design effectively reduces the ingress of moisture, water vapor, and other impurities.

[0050] Please see Figures 9-12 At least a portion of the channel sidewall of the pressure relief gap 30 has a longitudinal cross-sectional shape of at least one of wavy, sawtooth, arc, and straight, from the side closest to the accommodating space toward the outside of the housing 10. For exampleFigure 12 As shown, setting the cross-sectional shape of the sidewall of the pressure relief gap 30 to a wavy shape, combined with the change in the cross-sectional area of ​​the pressure relief gap 30, can effectively increase the turbulence of the gas flow and lengthen the airflow path, which can further reduce the gas velocity and reduce the intensity of the shock wave. For example... Figure 13 As shown, the cross-sectional shape of the sidewall of the pressure relief gap 30 is set to a sawtooth shape to achieve rapid pressure release and generate pressure fluctuations in a short time. Also, Figure 14 , Figure 15 The cross-sectional shape of the sidewall of the pressure relief gap 30 is set to an arc shape, or as shown. Figure 16 The cross-sectional shape of the sidewall of the pressure relief gap 30 is set to a straight line, as shown.

[0051] It should be noted that the cross-sectional shape of the sidewall of the pressure relief gap 30 is not limited to that of the attached... Figures 12-16 The shape shown is one of the wavy, sawtooth, arc, or straight lines. According to this concept, those skilled in the art can also replace it with other shapes, all of which fall within the protection scope of this utility model.

[0052] Of course, depending on the requirements, the cross-sectional shape of the pressure relief gap 30 on one side of the outer surface of the housing 10 can be set to one of the following: wavy, sawtooth, arc, or straight (not shown in the figure), which will not be explained in detail here.

[0053] In this embodiment, the pressure relief gap 30 is preferably located in the middle of the side wall of the housing 10 and / or in the middle of the conductive component 20 along its width direction, so as to ensure the pressure relief uniformity in the housing 10 and improve the pressure relief effect.

[0054] It should also be noted that, based on the above concept, and depending on the actual needs of the thermomelt cutter, those skilled in the art may also set other internal components on the thermomelt cutter, all of which fall within the protection scope of this utility model.

[0055] Example 2

[0056] Based on Example 1, please refer to Figure 2 , Figure 11 The housing 10 has a plurality of protrusions 11 that contact the heating element 50 on the side near the heating element 50; the protrusions 11 are located at the corners of the bottom of the housing 10, and the pressure relief gap 30 is formed between two protrusions 11 at adjacent corners of the bottom of the housing 10.

[0057] Specifically, the design of multiple protrusions 11 located at the corners creates a height difference between the bottom of the housing 10 and the surface of the heating element 50, forming a pressure relief gap 30. The specific structure and variations of the pressure relief gap 30 can be found in Embodiment 1, and will not be elaborated further here.

[0058] Based on this, the structure of the boss 11 near the pressure relief gap 30 is designed as an inclined surface, a stepped inclined surface, or an inclined arc surface, so that the pressure relief gap 30 can meet different cross-sectional area requirements. In this embodiment, the height of the boss 11 is preferably less than or equal to 0.2 mm, so that the height of the pressure relief gap 30 is less than or equal to 0.2 mm. Therefore, the shape of the boss 11 can be reasonably designed according to the shape of the pressure relief gap 30, and this embodiment is not limited thereto.

[0059] It should be understood that the "corner" in this second embodiment refers to the corner or edge of the shell 10, which is an area formed by the intersection of two or more planes or lines. For example, if the shell 10 shown in the attached figure is a rectangular structure, then "the corner of the bottom of the shell 10" refers to the four corners of the bottom of the rectangular shell 10, each corner being formed by the intersection of the bottom surface and two adjacent side surfaces.

[0060] Example 3

[0061] Based on Example 1, please refer to Figure 17 , Figure 18 An encapsulating adhesive layer 60 is formed between the housing 10 and the heating element 50. The encapsulating adhesive layer 60 is located at the bottom corner of the housing 10. The pressure relief gap 30 is formed between two encapsulating adhesive layers 60 at adjacent bottom corners of the housing 10.

[0062] Specifically, when encapsulating the housing 10 and the heating element 50, an encapsulating adhesive layer 60 can be applied to the corners of the housing 10 to achieve encapsulation. The material of the encapsulating adhesive layer 60 can be insulating materials such as epoxy resin or adhesive. Furthermore, when the corners of the housing 10 have the encapsulating adhesive layer 60, the height difference between the housing 10 and the heating element 50 formed by the thickness of the encapsulating adhesive layer 60 at the corners can serve as a pressure relief gap 30. That is, when an encapsulating adhesive layer 60 is used between the housing 10 and the heating element 50, it is not necessary to additionally open a pressure relief port on the housing 10; the gap formed between the housing 10 and the heating element 50 by the encapsulating adhesive layer 60 at the corners serves as the pressure relief gap 30. The specific structure and variations of the pressure relief gap 30 can be found in Embodiment 1, and will not be elaborated further here.

[0063] Accordingly, in order to meet the requirement that the cross-sectional area of ​​the pressure relief gap 30 on the side near the accommodating space is larger than the cross-sectional area on the side near the outer surface of the housing 10, the shape of the encapsulating adhesive layer 60 can be adjusted in this embodiment. Specifically, the shape of the encapsulating adhesive layer 60 on the side facing the pressure relief gap 30 is designed such that the cross-sectional area of ​​the pressure relief gap 30 on the side near the accommodating space is larger than the cross-sectional area on the side near the outer surface of the housing 10, for example... Figure 17 As shown. The above design can achieve the encapsulation of the thermoelectric cutter without the need for an additional pressure relief port on the housing 10, effectively saving steps and costs.

[0064] Similarly, it is understood that "corner" in this embodiment refers to the corner or edge of the housing 10, which is an area formed by the intersection of two or more planes or lines.

[0065] Example 4

[0066] The above-described embodiment one is a structural design scheme for a controlled patch-type thermoelectric cutter with a heating element, which utilizes the heat generated by the heating element to accelerate the melting and cutting of the fusible conductor. Unlike embodiment one, please refer to [link to embodiment one]. Figure 19 Example 4 provides a thermoplastic cutter consisting of upper and lower housings, which can be used with both temperature-sensitive alloy thermoplastic cutters and non-alloy thermoplastic cutters.

[0067] The temperature-sensitive alloy type thermoelectric cutter mainly includes a housing 10 and a conductive component 20. The conductive component 20 includes a first main electrode 21, a second main electrode 22, and a fusible conductor 23, wherein the fusible conductor 23 is a temperature-sensitive alloy. The temperature-sensitive alloy is bridged to the first main electrode 21 and the second main electrode 22 respectively; and the connection parts between the first main electrode 21, the second main electrode 22 and the temperature-sensitive alloy, as well as the temperature-sensitive alloy itself, are all located within the housing 10. Its working principle is that when a large current flows through the temperature-sensitive alloy, the temperature of the temperature-sensitive alloy rises to its melting point, and it automatically melts under the action of the flux, thereby effectively cutting off the main circuit.

[0068] The non-alloy type thermoelectric cutter includes a housing 10 and a conductive component 20. The conductive component 20 includes a first main electrode 21, a second main electrode 22, and a fusible conductor 23 connected to the first main electrode 21 and the second main electrode 22, respectively. Unlike the temperature-sensitive alloy type thermoelectric cutter, the fusible conductor 23 of the non-alloy type thermoelectric cutter is a molten material formed by one or more sets of bent and stacked sections to improve the current-carrying capacity of the thermoelectric cutter. The molten material has multiple narrow sections to improve the breaking capacity. In this embodiment, the first main electrode 21, the second main electrode 22, and the molten material are preferably integrated into a single structure, which can be processed from the same thin sheet of metal without welding in the middle, thus facilitating current flow.

[0069] Preferably, the housing 10 can be integrally formed or a split structure formed by the connection of an upper and lower housing. When the housing 10 is integrally formed, the pressure relief gap 30 can be directly integrally formed on the housing; when the housing 10 is a split structure, the pressure relief gap 30 is preferably formed in a slit between the upper and lower housings, or in the upper housing and / or in the lower housing, for example... Figure 19The pressure relief gap 30 shown is formed in the gap between the upper and lower shells. Both the upper and lower shells have gaps, and the gaps are connected to form the pressure relief gap 30. Of course, the pressure relief gap 30 can also be provided on the first main electrode 21 and / or the second main electrode 22. The design structure, shape and function of the pressure relief gap 30 can be referred to the above embodiment one. Preferably, a boss 11 as described in embodiment two and / or an encapsulating adhesive layer 60 as described in embodiment three can also be provided between the shell 10 and the conductive component 20. For details, please refer to embodiments two and three, which will not be repeated here.

[0070] In summary, the thermofusion cutter provided by this utility model, through the design of the pressure relief gap, can not only slow down the pressure release rate and better control the pressure relief process, but also limit the fluid flow rate, avoiding impact and vibration caused by excessive flow rate, making the pressure relief process more stable; at the same time, it can also effectively reduce the entry of moisture and water vapor, avoid corrosion and oxidation of the internal components of the thermofusion cutter, improve the performance and service life of the thermofusion cutter, and has good application prospects.

[0071] Furthermore, those skilled in the art should understand that although many problems exist in the prior art, each embodiment or technical solution of this utility model can be improved in only one or a few aspects, without necessarily solving all the technical problems listed in the prior art or background art simultaneously. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as a limitation on that claim.

[0072] Although this document frequently uses terms such as housing, boss, limiting block, first main electrode, second main electrode, conductive component, fluxing agent, pressure relief gap, heating element, heating substrate, heating electrode, and encapsulating adhesive layer, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model. The terms "first," "second," etc. (if present), in the description, claims, and accompanying drawings of the embodiments of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A thermoforming cutter, characterized in that, include: The housing and a conductive component located at least partially within the housing; the housing has an accommodating space formed inside; it also includes a pressure relief gap communicating with the outside, the pressure relief gap being located on at least one of the housing, the conductive component, and the space between the housing and the conductive component; The pressure relief gap has a channel extending from the accommodating space to the outside of the housing; the longitudinal cross-sectional area of ​​the pressure relief gap on the side closest to the accommodating space is greater than the longitudinal cross-sectional area of ​​the pressure relief gap on the side closest to the outside of the housing.

2. The thermosetting cutter according to claim 1, characterized in that: The pressure relief gap changes its longitudinal cross-sectional area from the side closest to the accommodating space toward the side closest to the outer side of the housing in at least one of the following ways: linear decrease or nonlinear decrease.

3. The thermosetting cutter according to claim 1, characterized in that: The height of the pressure relief gap is less than or equal to 0.2 mm.

4. The thermosetting cutter according to claim 1, characterized in that: At least a portion of the channel sidewall of the pressure relief gap has a longitudinal cross-sectional shape of at least one of wavy, sawtooth, arc, and straight, from the side closest to the accommodating space toward the outside of the housing.

5. The thermosetting cutter according to claim 1, characterized in that: The pressure relief gap is located in the middle of the side wall of the housing and / or in the middle of the conductive component along its width direction.

6. The thermosetting cutter according to claim 1, characterized in that: The housing has a plurality of protrusions that contact the conductive component on the side near the conductive component; the protrusions are located at the corners of the bottom of the housing, and the pressure relief gap is formed between two protrusions at adjacent corners of the bottom of the housing.

7. The thermosetting cutter according to claim 1, characterized in that: The conductive component includes a first main electrode, a second main electrode, and a fusible conductor; the fusible conductor is electrically connected to the first main electrode and the second main electrode respectively, and the fusible conductor is located within the accommodating space; the pressure relief gap is located on at least one of the first main electrode, the second main electrode, the housing, and the housing between the first main electrode and / or the second main electrode.

8. The thermosetting cutter according to claim 7, characterized in that: It also includes a heating element, which includes a heating substrate and heating electrodes located on the heating substrate; the heating electrodes are in contact with the fusible conductor; the first main electrode and the second main electrode are located on opposite sides of the heating element.

9. The thermosetting cutter according to claim 8, characterized in that: An encapsulating adhesive layer is formed between the housing and the heating element. The encapsulating adhesive layer is located at the corner of the bottom of the housing. The pressure relief gap is formed between two encapsulating adhesive layers at adjacent corners of the bottom of the housing.

10. The thermosetting cutter according to claim 1, characterized in that: It also includes a fluxing agent located within the accommodating space, the fluxing agent being in close contact with a portion of the conductive component, and a limiting block being formed on the surface of the housing facing the fluxing agent; when the housing is connected to the conductive component, the limiting block within the accommodating space abuts against the fluxing agent.

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