High-breaking flat plate type fuse structure

Abstract

The utility model belongs to the technical field of fuses, and particularly relates to a high-breaking flat plate type fuse structure, which comprises a fuse body and a shell, the fuse body is integrally formed into a flat plate shape, the fuse body is arranged in the shell, and the fuse body is provided with two power connection ends extending out of the shell; the middle section of the fuse body is provided with a bent fusing part, and the width of the fusing part is smaller than that of the fuse body; the shell is provided with a protection part corresponding to the fusing part, and the protection part is filled with arc extinguishing materials and used for wrapping the fusing part. As the melt is integrally formed and is provided with the two power connection ends extending out of the shell, stable connection with an external circuit can be kept in a bumping and vibrating environment, and the abnormal short circuit phenomenon is avoided. The flat-plate-shaped melt has a certain width and thickness, so that the resistance of high current passing through a power connection end is small, heat conduction is reduced, and the current is normally and stably transmitted to an external circuit. And the fusing part is in a bent state, and the width of the fusing part is smaller than that of the fuse body, so that when short-circuit current passes through, the fusing part can be fused quickly, and the breaking capacity of the fuse body is improved.

Description

Technical Field

[0001] This utility model belongs to the field of fuse technology, and in particular relates to a high breaking capacity flat plate fuse structure. Background Technology

[0002] In circuit protection systems for industries such as power and electronics, fuses are frequently used to protect circuits from breakage. A typical fuse consists of an insulating shell, an arc-quenching medium, a fusible element, and terminals welded to the fusible element. The fusible element and terminals are manufactured separately and then welded together to form an integrated structure. In the automotive field, fuses are subject to prolonged vibration and bumps, which can cause the welded joint between the fusible element and terminals to break, leading to abnormal short circuits. Utility Model Content

[0003] The purpose of this utility model is to provide a high breaking capacity flat-plate fuse structure to solve the problem that existing fuses are prone to breakage of the welding point between the fusible element and the terminal due to vibration, causing abnormal short circuits.

[0004] To achieve the above objectives, this utility model provides a high breaking capacity flat-plate fuse structure, including a fusible element and a housing. The fusible element is integrally formed into a flat plate shape and is installed inside the housing. The fusible element has two electrical terminals extending out of the housing. A curved fusing portion is provided in the middle section of the fusible element, and the width of the fusing portion is smaller than the width of the fusible element. The housing has a protective portion corresponding to the fusing portion, and the protective portion is filled with an arc-quenching substance to cover the fusing portion.

[0005] Furthermore, the protective part is also provided with an inner shell for surrounding the fuse part, and both the inner shell and the fuse part are wrapped with arc-extinguishing material.

[0006] Furthermore, the inner shell is provided with a through hole, and the arc-quenching substance of the protective part flows into the gap between the inner wall of the inner shell and the melt from the through hole.

[0007] Furthermore, the fusion section is provided with multiple through grooves, and fusion points are formed on both sides of the through grooves.

[0008] Furthermore, the thickness of the protective part is greater than the thickness of the housing near the electrical terminal.

[0009] Furthermore, the inner shell is made of transparent insulating material, and the side of the protective part is provided with a transparent closed window for observing the state of the fuse part.

[0010] The high-breaking capacity flat-plate fuse structure provided in this embodiment of the utility model has at least the following technical effects:

[0011] Because the fusible element is integrally molded and has two terminals extending from the housing, it can maintain a stable connection with the external circuit even under bumpy and vibrating conditions, thus avoiding abnormal short circuits. The flat fusible element has a certain width and thickness, resulting in low resistance when high current passes through the terminals, reducing heat conduction, and ensuring normal and stable current transmission to the external circuit. The bent fuse section within the fusible element, with its width smaller than the fusible element width, allows for rapid melting of the fuse section when overloaded or short-circuited current passes through it, improving the fusible element's breaking capacity. Furthermore, the bent fuse section reduces the length of the fusible element, facilitating control over the fuse's size. The arc-quenching material in the protective section covers the fusible element, ensuring insulation after the fuse section breaks, guaranteeing the safe use of the fuse. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Fig. 1 A perspective view of the high breaking capacity flat-plate fuse structure provided for an embodiment of this utility model.

[0014] Fig. 2 A structural diagram of the fusible element of the high breaking capacity flat-plate fuse structure provided in this embodiment of the utility model.

[0015] Fig. 3 A cross-sectional view of the high breaking capacity flat-plate fuse structure provided in an embodiment of this utility model.

[0016] Fig. 4 A structural diagram of the housing of a high-breaking capacity flat-plate fuse provided in an embodiment of this utility model.

[0017] In the diagram, 100 is the molten metal, 110 is the electrical terminal, 120 is the fuse section, and 121 is the through groove.

[0018] 200. Shell, 210. Protective part, 211. Arc quenching substance, 212. Window, 220. Inner shell, 221. Through hole. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0020] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0023] In one embodiment of the high breaking capacity flat-plate fuse structure of this utility model, please refer to... Figs. 1-4 The high-breaking capacity flat-plate fuse structure includes a fusible element 100 and a housing 200. The fusible element 100 is integrally formed into a flat plate shape and is installed inside the housing 200. The fusible element 100 also has two terminals 110 extending out of the housing 200. A curved fusing section 120 is provided in the middle section of the fusible element 100, and the width of the fusing section 120 is smaller than the width of the fusible element 100. The housing 200 has a protective section 210 corresponding to the fusing section 120, and the protective section 210 is filled with an arc-quenching material 211 to cover the fusing section 120.

[0024] Specifically, because the fusible element 100 is integrally formed and has two terminals 110 extending out of the housing 200, it can maintain a stable connection with the external circuit under bumpy and vibrating conditions, thereby avoiding abnormal short circuits. The flat fusible element 100 has a certain width and thickness, which reduces the resistance of high current passing through the terminals 110, reduces heat conduction, and allows the current to be stably transmitted to the external circuit through the terminals 110. The fuse section 120 inside the fusible element is in a bent state, and the width of the fuse section 120 is smaller than the width of the fusible element 100, so that when the current of the circuit is overloaded or short-circuited, the fuse section 120 can be quickly melted, improving the breaking capacity of the fusible element 100. Moreover, the bent fuse section 120 can reduce the length of the fusible element 100, making it easier to control the size of the fuse. The arc-quenching material 211 of the protective part covers the fusible element 100, ensuring the insulation effect after the fuse section 120 is broken, ensuring the safe use of the fuse.

[0025] Furthermore, the protective section 210 also includes an inner shell 220 to surround the fuse section 120. Both the inner shell 220 and the fuse section 120 are encased in arc-extinguishing material 211. Specifically, the inner shell 220 surrounds the fuse section 120, so that the arc energy generated when the fuse section 120 breaks is first blocked by the inner shell 220 and the arc-extinguishing material 211. If the arc energy is too large and causes the inner shell 220 to rupture, the protective section 210 forms secondary protection to prevent the arc from leaking outside the shell 200 and affecting circuit safety.

[0026] Furthermore, the inner housing 220 is provided with a through hole 221, through which the arc-quenching material 211 of the protective part flows into the gap between the inner wall of the inner housing 220 and the molten metal 100. Specifically, the through hole 221 allows the arc-quenching material of the inner housing 220 and the protective part 210 to circulate with each other, which can effectively improve the thermal conductivity, increase the upper limit of the rated current of the fuse, improve the arc-quenching capability, and make the fuse structure more stable.

[0027] Furthermore, the fuse section 120 is provided with multiple through slots 121, and fuse points are formed on both sides of the through slots 121. Specifically, the through slots 121 further reduce the conductive cross-sectional area of ​​the fuse section 120, so that when overload or short-circuit current passes through the fuse point, the breaking time of the fuse section 120 is shortened, thereby improving the breaking capacity of the fusible element.

[0028] Furthermore, the thickness of the protective part 210 is greater than the thickness of the housing 200 near the electrical contact end. Specifically, the greater thickness of the protective part 210 increases the thickness of the arc-quenching material 211, thereby enhancing the protective effect of the fuse part 120.

[0029] Furthermore, the inner housing 220 is made of transparent insulating material, and the protective part 210 has a transparent and closed window 212 on its side for observing the status of the fuse part 120. Specifically, this allows the user to observe whether the fuse part 120 is in the open state through this window 212 without needing to use tools to disassemble the fuse to make a judgment, thus saving troubleshooting time.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high breaking capacity flat-plate fuse structure, characterized in that: The device includes a melt and a shell. The melt is integrally formed into a flat plate shape and is installed inside the shell. The melt has two electrical terminals extending out of the shell. The middle section of the melt has a curved fusion section, the width of which is smaller than the width of the melt. The shell has a protective section corresponding to the fusion section, and the protective section is filled with an arc-quenching substance to cover the fusion section.

2. The high breaking capacity flat-plate fuse structure according to claim 1, characterized in that: The protective part is further provided with an inner shell for surrounding the fuse part, and both the inner shell and the fuse part are wrapped with arc-extinguishing material.

3. The high breaking capacity flat-plate fuse structure according to claim 2, characterized in that: The inner shell is provided with a through hole, and the arc-quenching material of the protective part flows into the gap between the inner wall of the inner shell and the melt from the through hole.

4. The high breaking capacity flat-plate fuse structure according to any one of claims 1 to 3, characterized in that: The fusion section is provided with multiple through grooves, and fusion points are formed on both sides of the through grooves.

5. The high breaking capacity flat-plate fuse structure according to any one of claims 1 to 3, characterized in that: The thickness of the protective part is greater than the thickness of the housing near the electrical terminal.

6. The high breaking capacity flat-plate fuse structure according to claim 2, characterized in that: The inner shell is made of transparent insulating material, and the side of the protective part is provided with a transparent closed window for observing the state of the fuse part.

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