Vertically mounted fuse

Abstract

The application provides a vertically installed fuse, which comprises an insulating tube body, a containing cavity is arranged in the insulating tube body, at least one platform extends from a first end surface of the insulating tube body to form an insulating base, the first end surface is a first cavity wall of the containing cavity, a first through hole and a second through hole are arranged on the insulating base and penetrate through the at least one platform and an inner wall, a first electrode is arranged to pass through the first through hole, and a second electrode is arranged to pass through the second through hole, the first electrode and the second electrode are used for being connected in a protected circuit to protect a subsequent circuit, at least one matching part is arranged on the at least one platform, the at least one matching part is connected with a cavity wall of the containing cavity through at least one fixed part formed by injection molding, a length of a first direction of the insulating tube body is at least twice of a maximum diameter of the first end surface of the insulating tube body and a maximum diameter of a second end surface of the insulating tube body, the first end surface is parallel to the second end surface, and the first direction is a direction from the first end surface to the second end surface or from the second end surface to the first end surface.

Description

Technical Field

[0001] This application belongs to the field of emergency protection device technology, specifically relating to a vertically installed fuse. Background Technology

[0002] Currently, against the backdrop of the rapid development of the new energy vehicle industry, the efficient utilization of in-vehicle space has been upgraded from an "optimization item" to a "core competitiveness." The underlying logic of this trend stems from consumers' direct demand for usable interior space (such as passenger compartments and storage areas), and also synergizes with technological developments such as improved power battery energy density and integrated electric drive systems. Once the overall vehicle range breaks through the "range anxiety" threshold, space utilization becomes a key indicator for measuring product competitiveness. In this process, the miniaturization of the on-board charger (OBC), one of the core subsystems of new energy vehicles, is particularly crucial: on the one hand, the OBC undertakes the core function of converting AC to DC power, and its size directly affects the layout space of surrounding components such as the high-voltage distribution box and battery pack; on the other hand, improving the power density (output power per unit volume) of the OBC can effectively reduce overall vehicle energy consumption, indirectly extending the actual driving range. Therefore, promoting the development of OBCs towards "lightweight, compact, and highly integrated" has become a technological consensus across the entire new energy vehicle industry chain.

[0003] However, in the technical breakthrough of OBC miniaturization, an easily overlooked but crucial aspect, the installation design of circuit protection devices (especially fuses), is becoming a key bottleneck restricting size optimization. Summary of the Invention

[0004] This application provides a vertically mounted fuse in order to reduce the area occupied by the fuse on the circuit board, thereby reducing the size of the circuit board.

[0005] In a first aspect, this application provides a vertically mounted fuse, including an insulating tube body, wherein a receiving cavity is provided in the insulating tube body, and at least one platform extends from a first end face of the insulating tube body to form an insulating base; the first end face is the first cavity wall of the receiving cavity.

[0006] The insulating base has a first through hole and a second through hole that penetrate at least one platform and the first cavity wall; a first electrode extends through the first through hole and a second electrode extends through the second through hole; the first electrode and the second electrode are used to connect in the protected circuit to protect the subsequent circuit.

[0007] At least one mating part is provided on the at least one platform, and the at least one mating part is connected to at least one fixing part; the at least one fixing part is integrally formed with the at least one mating part by injection molding and is connected to the cavity wall of the receiving cavity;

[0008] The length of the insulating tube in the first direction is at least twice the maximum diameter of the first end face and the maximum diameter of the second end face of the insulating tube; the first end face is parallel to the second end face, and the first direction is the direction from the first end face to the second end face or from the second end face to the first end face.

[0009] In conjunction with the first solution, in one possible embodiment, a sealing element is further included. The sealing element has a first penetration cavity that penetrates a third end face and a fourth end face. The first end of the insulating tube has a first opening, and a first substrate is provided to seal the first opening. The first end face is one side of the first substrate. The insulating base is formed by extending the at least one platform based on the first substrate. The insulating base and the insulating tube are connected as one unit by injection molding. A first step is provided on the outer wall of the first end of the insulating tube. The edge of the first substrate is flush with the first step. The sealing element is sleeved on the first step through the first penetration cavity to fix the insulating tube and the first substrate.

[0010] In conjunction with the first scheme, in one possible embodiment, a constricted portion is provided on the first step, and a protrusion is provided on the sealing member through the constriction operation; when the sealing member is fitted onto the first step, the protrusion and the constricted portion are combined to fix the sealing member to the insulating tube; the constriction operation refers to the process of shrinking the target area on the sealing member toward the inside of the first penetration cavity to form the protrusion when the sealing member is fitted onto the first step.

[0011] In conjunction with the first scheme, in one possible embodiment, the insulating base has a third through hole that passes through the first substrate and at least one platform in sequence, and the third through hole is used to fill the cavity with arc-extinguishing material.

[0012] In conjunction with the first scheme, in one possible embodiment, a support portion is provided on the fifth end face of the first substrate; the support portion is used to separate the circuit board from the first through hole and the second through hole by a predetermined distance when the vertically mounted fuse is soldered in the protected circuit, so as to provide a soldering distance.

[0013] In conjunction with the first solution, in one possible embodiment, a first platform extends from a first end face of the first substrate, and a second platform extends from the first platform;

[0014] The at least one mating part is respectively disposed at the first connection point between the first platform and the first substrate and / or the second connection point between the first platform and the second platform.

[0015] In conjunction with the first scheme, in one possible embodiment, it further includes a molten metal, which is integrally formed with the first electrode and the second electrode, wherein the first electrode is disposed at a first end of the molten metal and the second electrode is disposed at a second end of the molten metal;

[0016] The molten metal includes a fusing part, a first connecting part, and a second connecting part. The first connecting part is connected to a first end of the fusing part and a first electrode, respectively, and the second connecting part is connected to a second end of the fuse and a second electrode, respectively.

[0017] In conjunction with the first scheme, in one possible embodiment, the projections of the first end and the second end of the fuse portion on any plane do not overlap.

[0018] In conjunction with the first scheme, in one possible embodiment, a fourth through hole is also provided on the first step, the fourth through hole being used to fill the cavity with arc-extinguishing material.

[0019] In conjunction with the first scheme, in one possible embodiment, the arc-extinguishing material is 35-120 mesh quartz sand, the silica content of the quartz sand is ≥99.9%, and the water content is ≤0.1%; before filling the arc-extinguishing material, the insulating tube is preheated at 40-50℃.

[0020] As can be seen, the vertically installed fuse in this application includes an insulating tube body, in which a receiving cavity is provided, and at least one platform extends from a first end face of the insulating tube body to form an insulating base; the first end face is the first cavity wall of the receiving cavity; the insulating base has a first through hole and a second through hole penetrating the at least one platform and the first cavity wall; a first electrode extends through the first through hole and a second electrode extends through the second through hole; the first electrode and the second electrode are used to connect in the protected circuit to protect the downstream circuit; at least one mating part is provided on the at least one platform, and the at least one mating part is connected to the cavity wall of the receiving cavity through at least one injection-molded fixing part; the length of the insulating tube body in a first direction is at least twice the maximum diameter of the first end face of the insulating tube body and twice the maximum diameter of the second end face of the insulating tube body; the first end face is parallel to the second end face, and the first direction is the direction from the first end face to the second end face or from the second end face to the first end face. In this way, by placing the first and second electrodes at the end with the smallest area in the fuse, the fuse can be mounted on the circuit board vertically, reducing the area occupied by the fuse on the circuit board and thus reducing the size of the circuit board. At the same time, the fuse uses an insulating tube as the main body, and various structures are obtained by processing the insulating tube before connecting the first and second electrodes, which further reduces the overall size of the fuse. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the first type of vertically installed fuse provided in the embodiments of this application;

[0023] Figure 2 This is a schematic diagram of the structure of a metallic conductor provided in an embodiment of this application;

[0024] Figure 3 This is a cross-sectional schematic diagram of the first type of metallic conductor and insulating base provided in the embodiments of this application;

[0025] Figure 4 This is a cross-sectional schematic diagram of the second type of metal conductor and insulating base provided in the embodiments of this application;

[0026] Figure 5 This is a schematic diagram of the structure of an insulating tube provided in an embodiment of this application;

[0027] Figure 6 This is a cross-sectional schematic diagram of an insulating tube provided in an embodiment of this application;

[0028] Figure 7 This is a cross-sectional schematic diagram of a vertically installed fuse provided in an embodiment of this application;

[0029] Figure 8 This is a schematic diagram of the structure of a sealing element provided in an embodiment of this application;

[0030] Figure 9 This is a schematic diagram of the structure of the second type of vertically installed fuse provided in the embodiments of this application. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0032] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, systems, products, or apparatuses.

[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] Currently, in the technical breakthroughs of OBC miniaturization, the installation design of circuit protection devices (especially fuses) is becoming a key bottleneck restricting size optimization. Therefore, there is an urgent need to provide a fuse miniaturization solution.

[0035] To address the aforementioned problems, this application provides a vertically mounted fuse. This vertically mounted fuse can be applied in circuit protection scenarios. The vertically mounted fuse of this application includes an insulating tube with a receiving cavity. At least one platform extends from a first end face of the insulating tube to form an insulating base; the first end face is the first cavity wall of the receiving cavity; the insulating base has a first through hole and a second through hole penetrating the at least one platform and the first cavity wall; a first electrode extends through the first through hole, and a second electrode extends through the second through hole; the first and second electrodes are used to connect in the protected circuit to protect downstream circuits; at least one mating part is provided on the at least one platform, and the at least one mating part is connected to the cavity wall of the receiving cavity through at least one injection-molded fixing part; the length of the insulating tube in a first direction is at least twice the maximum diameter of the first end face and the maximum diameter of the second end face of the insulating tube; the first end face is parallel to the second end face, and the first direction is the direction from the first end face to the second end face or from the second end face to the first end face. In this way, by placing the first and second electrodes at the end of the fuse with the smallest area, the fuse can be mounted vertically on the circuit board, reducing the area occupied by the fuse on the circuit board and thus reducing the size of the circuit board. Simultaneously, the fuse uses an insulating tube as its main body, and various structures are created on the insulating tube before connecting the first and second electrodes, further reducing the overall size of the fuse. This solution is applicable to various scenarios, including but not limited to the applications mentioned above.

[0036] The specific structure will be described in detail below.

[0037] Please see Figures 1-9 This application provides a vertically mounted fuse 100, including an insulating tube 10, in which a receiving cavity 12 is provided, and at least one platform extends from a first end face 211 of the insulating tube 10 to form an insulating base 20; the first end face 211 is the first cavity wall of the receiving cavity 12.

[0038] The insulating base 20 has a first through hole 22 and a second through hole 23 that penetrate at least one platform and the first cavity wall; a first electrode 32 extends out from the first through hole 22 and a second electrode 33 extends out from the second through hole 23; the first electrode 32 and the second electrode 33 are used to connect in the protected circuit to protect the subsequent circuit.

[0039] At least one mating part 24 is provided on the at least one platform, and the at least one mating part 24 is connected to the cavity wall of the receiving cavity 12 through at least one fixing part formed by injection molding;

[0040] The length of the insulating tube 10 in the first direction is at least twice the maximum diameter of the first end face 211 of the insulating tube 10 and the maximum diameter of the second end face 111 of the insulating tube 10; the first end face 211 is parallel to the second end face 111, and the first direction is the direction from the first end face 211 to the second end face 111 or from the second end face 111 to the first end face 211.

[0041] In a specific implementation, the insulating tube 10 is formed by sealing the two ends of the second penetration cavity through a tubular shell including a second penetration cavity via a first substrate 21 and a second substrate, respectively. The sealed second penetration cavity is the receiving cavity 12 in the insulating tube 10. The tubular shell, the first substrate 21, and the second substrate are integrally formed by injection molding. The side of the first substrate 21 that serves as the cavity wall of the receiving cavity 12 is a first end face 211, and the side of the second substrate that serves as the cavity wall of the receiving cavity 12 is a second end face 111. At least one platform extends from the first end face 211, allowing the first substrate 21 to bond with the tube wall of the tubular shell through at least one platform, further improving the bonding strength between the first substrate 21 and the tubular shell through friction. Optionally, the insulating tube 10 is made of a composite material with 30% glass fiber toughening added to high-temperature engineering plastic PA66, and manufactured by injection molding. It is understood that other materials can also be used, and adjustments can be made according to specific production scenarios; no unique limitation is made here.

[0042] For details, please refer to Figures 2 to 4 The fuse 100 further includes a molten metal element 31, which is integrally formed with the first electrode 32 and the second electrode 33. The first electrode 32 is disposed at the first end of the molten metal element 31, and the second electrode 33 is disposed at the second end of the molten metal element 31. The molten metal element 31 includes a fusing portion 311, a first connecting portion 312, and a second connecting portion 313. The first connecting portion 312 is connected to the first end of the fusing portion 311 and the first electrode 32, respectively, and the second connecting portion 313 is connected to the second end of the fuse 100 and the second electrode 33, respectively.

[0043] Optionally, the fusing part 311, the first electrode 32, the second electrode 33, the first connecting part 312, and the second connecting part 313 are integrally formed to form a metal conductor 30. The metal conductor 30 is preferably made of T2 copper or oxygen-free copper (other materials are also acceptable, and are not limited here). During manufacturing, the metal material is first prepared into a rectangular metal sheet of a predetermined size. Then, based on the specifications of each component, the fusing part 311, the first electrode 32, the second electrode 33, the first connecting part 312, and the second connecting part 313 are fabricated on the rectangular metal sheet using appropriate manufacturing processes to obtain the metal conductor 30.

[0044] The shape of the metal conductor 30 is not limited, as long as the first electrode 32 and the second electrode 33 can pass through the first through hole 22 and the second through hole 23. The thickness of the fusing portion 311 is less than the thickness of the first connecting portion 312, the second connecting portion 313, the first electrode 32, and the second electrode 33. The fusing portion 311 forms multiple narrow necks 3111 with small cross-sectional areas at specific locations through through holes, serving as the first point of fusing under abnormal current. Optionally, the projections of the first and second ends of the fusing portion 311 on any plane do not overlap. Taking a U-shaped structure as an example, the narrow necks 3111 are formed on the two vertically downward arms (i.e., the first and second vertical arms) of the U-shaped structure, and are slightly offset on both sides to ensure that arcing does not occur when an electric arc is generated. The first electrode 32 and the second electrode 33 extend from the first through hole 22 and the second through hole 23 on the insulating base 20 and are exposed outside the fifth end face 212 of the first substrate 21, for connecting the product to the circuit board of the protected circuit. The first connecting portion 312 and the second connecting portion 313 are respectively inside the first through hole 22 and the second through hole 23 of the insulating base 20, for transitional connection between the fuse portion 311 and the first electrode 32 and the second electrode 33. In addition, the first connecting portion 312 extends obliquely from the first hanging arm of the fuse portion 311 in a direction away from the second hanging arm to the first electrode 32, and then connects to the first hanging arm and the first electrode respectively. Similarly, the second connecting portion 313 extends obliquely from the second hanging arm of the fuse portion 311 in a direction away from the first hanging arm to the second electrode 33, and then connects to the second hanging arm and the second electrode 33 respectively. This arrangement increases the insulation distance between the first electrode 32 and the second electrode 33 without changing the distance between the two hanging arms of the fuse.

[0045] The insulating base 20 can be a multi-layered stepped structure. The first end face 211 and the fifth end face 212 of the first substrate 21 of the insulating base 20 have the same cross-sectional area as the tubular shell parallel to the first end face 211 and the fifth end face 212, and are used for edge positioning outside the opening of the insulating tube 10, that is, the edge of the first substrate 21 is flush with the first step 15; however, the cross-sectional area of ​​at least one platform decreases layer by layer. It is understood that the insulating base 20 may also be provided with one platform, multiple platforms, or no platform, which can be adjusted according to the actual production situation, and no unique limitation is made here.

[0046] Taking a two-layer platform as an example, at least one platform includes a first platform 2131 and a second platform 2132. The first platform 2131 is disposed on the first substrate 21, and the second platform 2132 is disposed on the first platform 2131. The size of the first end face 211 of the first substrate 21 is larger than the size of the first platform 2131, and the size of the first platform 2131 is larger than the size of the second platform 2132.

[0047] Furthermore, the fuse 100 in this embodiment can be obtained through two molding processes. In the first injection molding, the molded metal conductor 30 is placed at a specific position in the molding die of the insulating base 20, and the metal conductor 30 and the insulating base 20 are molded into a single unit using the Insert Molding process. In the second molding, a tubular shell with only one open end is manufactured by injection molding. Then, the insulating base 20 with the metal conductor 30 is inserted into the tubular shell and placed at a specific position in the molding die for secondary molding, thus molding the tubular shell and the insulating base 20 into a single unit to form the vertically mounted fuse 100. In this way, the metal conductor 30 has been inserted into the insulating tube 10.

[0048] Specifically, in one possible embodiment, please refer to Figures 3-7 A first platform 2131 extends from the first end face 211 of the first substrate 21, and a second platform 2132 extends from the first platform 2131; at least one mating part 24 is respectively disposed at a first connection between the first platform 2131 and the first substrate 21, and / or at a second connection between the first platform 2131 and the second platform 2132.

[0049] In a specific implementation, corresponding mating parts 24 can be provided on the second step formed between the first substrate 21, the first platform 2131, and the second platform 2132. For example, at least one recess (i.e., mating part 24) can be formed on the side of the first platform 2131. During secondary in-mold molding, the injection molding material fills the recess, thereby making the insulating base 20 and the insulating tube 10 integrated, and improving the bonding strength between the insulating base 20 and the insulating tube 10. The cross-sectional dimensions of the insulating tube 10 parallel to the first substrate 21 are equal to the cross-sectional dimensions of the first substrate 21, thereby enabling mold positioning. Two through holes are formed on the surface of the uppermost platform leading to the fifth end face 212 of the first substrate 21, forming the first through hole 22 and the second through hole 23. The first connecting part 312 and the second connecting part 313 of the metal conductor 30 are accommodated through the first through hole 22 and the second through hole 23. Optionally, the mating part 24 can be a recess or other shapes, such as a through hole that runs horizontally through the platform, a T-slot, or other types of grooves, as long as it can achieve the function described in this embodiment. It is not limited to a single shape here.

[0050] As can be seen, in this embodiment, the first electrode 32 and the second electrode 33 are provided at the end with the smallest area in the fuse 100, so that the fuse 100 can be mounted on the circuit board vertically, reducing the area occupied by the fuse 100 on the circuit board and thus reducing the size of the circuit board. At the same time, the fuse 100 uses the insulating tube 10 as the main body, and various structures are obtained by processing the insulating tube 10 before connecting the first electrode 32 and the second electrode 33, further reducing the overall size of the fuse 100. In addition, the insulating base 20 is provided to increase the weight of one end of the first substrate 21 in the fuse 100, so that the fuse 100 can be more firmly attached to the circuit board when mounted vertically.

[0051] In one possible embodiment, please refer to Figure 7 and Figure 8The fuse 100 further includes a sealing element 40, which has a first penetrating cavity 41 penetrating a third end face and a fourth end face; the first end of the insulating tube 10 has a first opening 161 and a first substrate 21 is provided to seal the first opening 161, the first end face 211 is one side of the first substrate 21, the insulating base 20 is formed by extending at least one platform based on the first substrate 21, and the insulating base 20 and the insulating tube 10 are connected as one unit by injection molding; the outer wall of the first end of the insulating tube 10 is provided with a first step 15, and the edge of the first substrate 21 is flush with the first step 15; the sealing element 40 is sleeved on the first step 15 through the first penetrating cavity 41 to fix the insulating tube 10 and the first substrate 21.

[0052] In a specific implementation, the sealing member 40 is fastened to the first step 15 of the insulating tube 10, thereby fixing the first substrate 21 to the insulating tube 10; at the same time, the sealing member 40 is used to block the third through hole 13 for injecting arc-extinguishing material, which is provided on the first step 15 and penetrates into the receiving cavity 12, so as to prevent the arc-extinguishing material filled into the insulating tube 10 from flowing out through the third through hole 13.

[0053] After the metal conductor 30 is prepared, an insulating base 20 including a first substrate 21 and at least one platform is obtained by the first injection molding. Then, a tubular shell including a first groove 16 is prepared. The insulating base 20 is then inserted into the first groove 16 of the tubular shell. Finally, the insulating base 20 and the insulating tube 10 are integrally formed by the second injection molding to obtain a vertically installed fuse 100.

[0054] This integrated manufacturing method fundamentally simplifies the complex production process of traditional fuses, reduces intermediate assembly steps, and significantly lowers the difficulty of product manufacturing. In terms of production efficiency, by eliminating the connection and waiting time between multiple processes, the production cycle is significantly shortened. Regarding quality control, the reduced human factors and component matching errors during assembly greatly improve the consistency of product manufacturing processes, effectively reducing the product defect rate. Furthermore, the simplified process and increased production efficiency significantly reduce raw material waste and labor costs, while also correspondingly reducing equipment use and maintenance costs. Ultimately, this achieves effective cost control, significantly enhancing the product's competitiveness in the market and providing new ideas and directions for technological development and industrial upgrading in the fuse manufacturing field.

[0055] In one possible embodiment, please continue reading Figure 1 , Figure 6 , Figure 7 and Figure 9The first step 15 is provided with a constricted portion 14, and the sealing member 40 is provided with a protrusion formed by the constriction operation; when the sealing member 40 is fitted onto the first step 15, the protrusion and the constricted portion 14 are combined to fix the sealing member 40 to the insulating tube 10; the constriction operation refers to the process of shrinking the target area on the sealing member 40 toward the inside of the first penetration cavity to form the protrusion when the sealing member 40 is fitted onto the first step 15.

[0056] In a specific implementation, the sealing element 40 is fitted onto the first step 15, covering the constricted portion 14. Then, pressure is applied to the sealing element 40 at the position corresponding to the constricted portion 14, causing the outer wall of the sealing element 40 to retract inwards towards the constricted portion 14, forming a protrusion. The constricted portion 14 limits the protrusion, preventing the sealing element 40 from shifting or falling off during product vibration. Optionally, the sealing element 40 is made of an elastic metal material (such as beryllium bronze or stainless steel) to ensure sealing performance and mechanical strength, while also providing electromagnetic shielding for the fuse 100. Optionally, the constricted portion 14 can be a groove, a through hole, or other concave shape; no unique limitation is made here.

[0057] In one possible embodiment, please refer to Figure 1 , Figure 5 and Figure 7 The first step 15 is also provided with a fourth through hole, which is used to fill the cavity 12 with arc-extinguishing material.

[0058] In the specific implementation, a fourth through hole is opened on the first step 15 of the insulating tube 10 as a sand filling hole for filling the arc extinguishing material; quartz sand is used as the arc extinguishing material, and it is added into the sealed cavity inside the insulating tube 10 through a vibration filling process to wrap the molten metal 31, thereby limiting the expansion of the arc channel and quickly extinguishing the arc.

[0059] Specifically, a vibration filling process is used to add the arc-extinguishing material into the insulating tube 10 through the sand filling hole, achieving the required filling density. The arc-extinguishing material is 35-120 mesh quartz sand, with a silica content ≥99.9% and a moisture content ≤0.1%. Before filling with the arc-extinguishing material, the insulating tube 10 is preheated at 40-50℃ to reduce the surface tension of the material and improve the filling effect.

[0060] During the filling process, the insulating tube 10 is vertically fixed on an electromagnetic vibration table. The vibration frequency is set to 20-30Hz, and the amplitude is 0.5-1.0mm, ensuring that the arc-extinguishing material is uniformly and tightly filled under the combined effects of gravity and vibration. The filling quality is monitored using a weighing method. After filling is complete, a density testing device is used to ensure that the filling density reaches the required level. This ensures that the arc-extinguishing material functions effectively when the fuse breaks the circuit at 100%.

[0061] In one example, the molten metal 31 is tightly wrapped with an arc-extinguishing material, which includes materials such as quartz sand, alumina, organic polymer resin, and organosilicon resin, to quickly extinguish the arc generated after the molten metal 31 is disconnected under abnormal current.

[0062] In one possible embodiment, please refer to Figure 9 The insulating base 20 has a third through hole 13 that passes through the first substrate 21 and at least one platform in sequence. The third through hole 13 is used to fill the cavity 12 with arc-extinguishing material.

[0063] In specific implementation, the location design of the third through hole 13 in the manufacturing process of fuse 100 has a significant impact on the filling quality and production efficiency of the arc-extinguishing material. When the third through hole 13 is set on the first step 15 as described in the above example, due to the filling principle of the arc-extinguishing material under the action of gravity, in order to ensure that the arc-extinguishing material can flow smoothly into the internal cavity of the insulating tube 10 and to prevent the material from overflowing during the filling process, fuse 100 can only be placed horizontally in the filling process. Vertical placement refers to a placement method with a smaller horizontal projected area, while horizontal placement refers to a placement method with a larger horizontal projected area. This horizontal placement method has particularly prominent drawbacks when the height of fuse 100 is large. Because the horizontal length of fuse 100 increases significantly when placed horizontally, the arc-extinguishing material, after entering from the third through hole 13, needs to flow through a longer horizontal path to reach the other end of fuse 100. During this process, the arc-extinguishing material will generate a large frictional force with the inner wall of the insulating tube 10, resulting in increased material flow resistance. Meanwhile, during the filling process, the arc-extinguishing material tends to accumulate midway, making it difficult to distribute evenly to the far end of the fuse 100. This makes it difficult to guarantee the filling density of the arc-extinguishing material at the end of the fuse 100, severely affecting the arc-extinguishing performance of the fuse 100. In addition, the long-distance flow of the material also significantly increases the filling time, greatly reducing production efficiency and increasing the quality risks such as material moisture absorption and impurity contamination due to excessively long filling time.

[0064] like Figure 9As shown, in this embodiment, a third through hole 13 is provided at the bottom center of the insulating base 20 as a sand filling hole. This design allows the fuse 100 to be placed vertically when filling with arc-extinguishing material. After the arc-extinguishing material is filled, a sand-stop plug is pressed into the third through hole 13, and then a sealing silicone is applied to the sand-stop plug to increase the sealing effect and bonding strength. The advantage of vertical placement is that the arc-extinguishing material can fall directly to the second end face 111 vertically under the action of gravity, minimizing the bending and resistance of the material flow path, so that the arc-extinguishing material can fill the internal cavity of the insulating tube 10 more efficiently. At the same time, since the material falls vertically, it can be evenly distributed inside the tube, avoiding local accumulation or insufficient filling, thereby effectively ensuring the uniformity and stability of the filling density. This not only significantly improves production efficiency, but also ensures the consistency and reliability of the arc-extinguishing performance of the fuse 100, providing a strong guarantee for the quality of the fuse 100. Optionally, a fifth through hole can be provided on the second substrate as a sand filling hole. Since the second substrate and the first substrate are substrates facing each other, filling the arc-extinguishing material through the fifth through hole can also achieve the purpose of vertical filling in this embodiment, thereby achieving the same or similar technical effect as the third through hole.

[0065] In one possible embodiment, please refer to Figure 1 and Figure 9 A support portion 25 is provided on the fifth end face of the first substrate 21; the support portion 25 is used to separate the circuit board from the first through hole 22 and the second through hole 23 by a preset distance when the vertically mounted fuse 100 is welded in the protected circuit, so as to provide a welding distance.

[0066] In a specific implementation, a number of support portions 25 are preset at the bottom of the insulating base 20 so that a certain gap is maintained between the insulating base 20 and the circuit board during welding. This makes it easier for the solder to enter the bottom of the product and cover the entire end electrode, increasing the contact area between the solder and the end electrode, reducing the contact resistance, and improving the welding quality.

[0067] It is understood that the number of support portions 25 can be selected as needed. For example, depending on the type of clamp, one, two, or more support portions 25 can be provided so that the fuse 100 can be isolated from the circuit board through the support portions 25. This also enhances the stability of the fuse 100 during welding and reduces unnecessary displacement during welding. Although the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can easily conceive of variations or substitutions without departing from the spirit and scope of the present invention, and various modifications and alterations can be made, including combinations of the different functions and implementation steps described above, as well as software and hardware implementation methods, all of which are within the protection scope of the present invention.

Claims

1. A vertically mounted fuse, characterized in that, It includes an insulating tube and a sealing element. The insulating tube has a receiving cavity, and at least one platform extends from a first end face of the insulating tube to form an insulating base. The first end face is the first cavity wall of the receiving cavity. The insulating base has a first through hole and a second through hole that penetrate at least one platform and the first cavity wall; a first electrode extends through the first through hole and a second electrode extends through the second through hole; the first electrode and the second electrode are used to connect in the protected circuit to protect the subsequent circuit. At least one mating part is provided on the at least one platform, and the at least one mating part is connected to at least one fixing part; the at least one fixing part is formed in the at least one mating part by injection molding and integrally formed with the at least one mating part, and extends from the at least one mating part and connects to the cavity wall of the receiving cavity; The sealing element has a first penetrating cavity that penetrates the third end face and the fourth end face of the sealing element; The first end of the insulating tube is provided with a first opening, and a first substrate is provided to seal the first opening. The first end face is one of the faces on the first substrate. The insulating base is formed by extending the at least one platform based on the first substrate. A first step is provided on the outer wall of the first end of the insulating tube, and the edge of the first substrate is flush with the first step. The sealing element is sleeved on the first step through the first penetration cavity to fix the insulating tube and the first substrate; The first step has a constricted portion, and the sealing element has a protrusion formed by the constriction operation. When the sealing element is fitted onto the first step, the protrusion and the constricted portion are combined to fix the sealing element to the insulating tube. The constriction operation refers to the process of shrinking the target area on the sealing element toward the inside of the first penetration cavity to form the protrusion when the sealing element is fitted onto the first step.

2. The vertically installed fuse according to claim 1, characterized in that, The insulating tube is made of a composite material with added glass fiber toughening to a high-temperature resistant engineering plastic and manufactured by injection molding.

3. The vertically installed fuse according to claim 1, characterized in that, The insulating base has a third through hole that passes through the first substrate and at least one platform in sequence. The third through hole is used to fill the cavity with arc-extinguishing material.

4. The vertically installed fuse according to claim 1, characterized in that, A support portion is provided on the fifth end face of the first substrate; the support portion is used to separate the circuit board from the first through hole and the second through hole by a preset distance when the vertically mounted fuse is soldered in the protected circuit, so as to provide a soldering distance.

5. The vertically installed fuse according to claim 1, characterized in that, A first platform extends from the first end face of the first substrate, and a second platform extends from the first platform; The at least one mating part is respectively disposed at the first connection point between the first platform and the first substrate and / or the second connection point between the first platform and the second platform.

6. The vertically installed fuse according to claim 1, characterized in that, It also includes a molten metal, which is integrally formed with the first electrode and the second electrode. The first electrode is disposed at a first end of the molten metal, and the second electrode is disposed at a second end of the molten metal. The molten metal includes a fusing part, a first connecting part, and a second connecting part. The first connecting part is connected to a first end of the fusing part and a first electrode, respectively, and the second connecting part is connected to a second end of the fuse and a second electrode, respectively.

7. The vertically installed fuse according to claim 6, characterized in that, The projections of the first and second ends of the fuse portion onto any plane do not overlap.

8. The vertically installed fuse according to claim 1, characterized in that, A fourth through hole is also provided on the first step, which is used to fill the cavity with arc-extinguishing material.

9. The vertically mounted fuse according to claim 3 or 8, characterized in that, The arc-extinguishing material is 35-120 mesh quartz sand, with a silica content ≥99.9% and a moisture content ≤0.1%; before filling the arc-extinguishing material, the insulating tube is preheated to 40-50℃.

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