Flat fuse device

Abstract

The utility model relates to a flat fuse device, which comprises a shell, a conductive loop, a cutting structure and an arc extinguishing structure, and is characterized in that the conductive loop comprises two wiring terminals and a fusing part, the two wiring terminals extend out of two opposite ends of the shell, and the fusing part is arranged in the shell and is connected with the two wiring terminals; the cutting structure is slidably arranged in the shell along the width direction (as shown in the figure, the X-axis direction is the width direction, and the Y-axis direction is the height direction) of the conductive loop, is positioned on one side of the fusing part, and is used for cutting off the fusing part; and the arc extinguishing structure is arranged in the shell and is positioned on one side, deviating from the cut-off structure, of the fusing part. The conductive loop is divided into the two wiring terminals and the fusing part, so that the conductive loop is convenient to cut off, and meanwhile, the cutting-off structure is arranged along the X-axis direction of the conductive loop in a matched manner, so that the whole body can become flat, the size of the whole body is reduced, and the occupied space is relatively small.

Description

Technical Field

[0001] This utility model relates to the field of current protection device technology, and in particular to a flat fuse device. Background Technology

[0002] A fuse is an electrical device that breaks the circuit by melting a fusible element when the current exceeds a specified value. Currently, in the power industry and the new energy vehicle industry, especially in the field of devices that can quickly disconnect circuits, most fuses are excitation-type fuses.

[0003] In the current high-voltage field, the fuses of this type in the existing technology are mainly "vertical", that is, the power source is in the vertical direction of the conductive circuit, and they are in an up-down position. According to market application feedback and integration needs, "vertical" fuses are difficult to miniaturize in the vertical direction, occupy a lot of space, and if the conductive circuit is rotated 90 degrees, there are problems with installation. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a miniaturized, space-saving flat fuse device.

[0005] This utility model provides a flat fuse device, including: a housing, a conductive circuit, a cutting structure, and an arc-extinguishing structure. The conductive circuit includes two terminals extending from opposite ends of the housing and a fusible part disposed within the housing and connected to the two terminals. The cutting structure is slidably disposed within the housing along the width direction of the conductive circuit (as shown in the figure, where the X-axis direction is the width direction and the Y-axis direction is the height direction) and located on one side of the fusible part, for cutting off the fusible part. The arc-extinguishing structure is disposed within the housing and located on the side of the fusible part opposite to the cutting structure.

[0006] This design, by dividing the conductive circuit into two terminals and a fuse, makes the conductive circuit easy to cut off. At the same time, the cutting structure is set along the X-axis of the conductive circuit, which makes the whole structure flat, thereby reducing the overall size, occupying less space, facilitating installation, and making it suitable for use in various confined spaces.

[0007] In one embodiment, the width of the fused portion is smaller than the width of the two terminals, so as to form a cutting groove between the two terminals, and the cutting structure is located in the cutting groove.

[0008] This design, by setting the width of the fuse section to be less than the width of the two terminals, creates a space that can accommodate the cut-off structure, further reducing the overall volume and facilitating the cutting of the fuse section.

[0009] In one embodiment, the two ends of the fuse portion are integrally connected to the two terminals, and the two ends of the fuse portion are respectively provided with pre-breaks, and the opening direction of the two pre-breaks is facing the cutting structure.

[0010] This design, by incorporating two pre-break points in the fuse section, allows the connection points between the two ends of the fuse section and the two terminals to be cut off simultaneously, thereby reducing the risk of leakage due to incomplete cutting and the generation of electric arcs.

[0011] In one embodiment, the fused portion has a bend located between the two pre-break points, the bend being located on the side of the fused portion opposite to the cutting groove.

[0012] This design, by opening a bend in the fuse section, further facilitates the cutting of the fuse section. Placing the bend in the middle of the two pre-break points further reduces the brief contact caused by deformation between the fuse section and the two terminals at the moment of cutting.

[0013] In one embodiment, the cutting structure includes a protective member and a pressure member. The protective member is hollow and fixedly installed in the cutting groove. One end of the protective member abuts against the two pre-cut joints (23). The pressure member is slidably disposed in the protective member, with one end of the pressure member facing the two pre-cut joints.

[0014] This design, by placing the protective element inside the cutting groove, prevents the arc generated when the fused section is cut from shooting out, and aligning the pressure element with the two pre-cut surfaces facilitates a smoother cut.

[0015] In one embodiment, the cutting structure further includes a notch and a sharp member. The notch is formed on the side of the pressure member near the fusion portion, and the sharp member is positioned opposite the bend and has a gap between it and the bend.

[0016] This configuration, by placing the sharp element in the opposite position to the pressure element, allows the fusible part to undergo a deformation process away from the two terminals when it is cut off, further reducing the arc energy.

[0017] In one embodiment, the cutting structure further includes a connecting groove, which is formed on the side of the pressure member opposite to the recessed groove and is spaced apart from the power source.

[0018] This design, by creating a notch in the pressure member, facilitates the placement of the cut-off portion and provides deformation space for the cut-off portion, further reducing arc energy.

[0019] In one embodiment, an arc-extinguishing groove is provided inside the outer casing, and the arc-extinguishing groove is located on the side of the fused portion away from the cutting groove; the arc-extinguishing structure includes at least one arc-initiating element (in this embodiment, there are two arc-initiating elements respectively located on both sides of the sharp element), all the arc-initiating elements are fixedly connected in the arc-extinguishing groove, and the sharp element is fixedly connected in the arc-extinguishing groove.

[0020] This configuration, by confining the arc generated after the fuse is cut within the arc-extinguishing groove and attracting it to the two arc-initiating elements in this design, further reduces the arc energy.

[0021] In one embodiment, the arc-extinguishing structure further includes: one or more seals (two in this embodiment), all of which are sequentially fitted onto the pressure member, and all of which abut against the inner wall of the protective member.

[0022] This configuration, by placing the seal on the pressure component, helps to reduce the arc flow generated by the pressure component at the moment of cutting off the fusible part.

[0023] In one embodiment, a power source is also included: the power source is disposed within the housing along the width direction of the conductive circuit and is opposite to the position of the connecting groove, and the power source is capable of pushing the pressure member.

[0024] This configuration, by placing the power source along the X-axis of the conductive circuit, further reduces the overall size.

[0025] Therefore, this utility model has the following advantages compared with the prior art:

[0026] 1. According to the flat fuse device involved in this utility model, by dividing the conductive circuit into two terminals and a fuse part, the conductive circuit can be easily cut off. At the same time, the cutting structure is set along the X-axis of the conductive circuit, which makes the whole thing flat, thereby reducing the overall size, occupying less space, facilitating installation, and being used in different narrow spaces. By setting the power source along the X-axis of the conductive circuit, the overall size is further reduced.

[0027] 2. According to the flat fuse device of this utility model, by setting the width of the fuse part to be less than the width of the two terminals, a space is formed that can accommodate the cutting structure, further reducing the overall volume and facilitating the cutting of the fuse part. By setting two pre-breaks in the fuse part, the connection positions between the two ends of the fuse part and the two terminals can be cut off simultaneously, thereby reducing the risk of leakage and arcing caused by incomplete cutting. By opening a bend in the fuse part, it is further facilitated to cut the fuse part. Setting the bend in the middle of the two pre-breaks further reduces the brief contact caused by deformation between the fuse part and the two terminals at the moment of cutting.

[0028] 3. According to the flat fuse device involved in this utility model, by setting the protective member in the cutting groove, the arc generated when the fuse part is cut can be prevented from flying out. The pressure member is facing the two pre-break points to facilitate a smoother cut. By setting the sharp member in the opposite position to the pressure member, the fuse part can undergo a deformation process away from the two terminals when it is cut, which further reduces the arc energy. By confining the arc generated after the fuse part is cut in the arc extinguishing groove and being attracted by the two arc ignition members set in this solution, the arc energy is further reduced. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the flat fuse device in this embodiment;

[0030] Figure 2 This is a schematic diagram of the internal structure of the flat fuse device in this embodiment;

[0031] Figure 3 This is an example. Figure 2 Schematic diagram of the structure at the intermediate wiring terminal;

[0032] Figure 4 This is an example. Figure 2 Internal structure diagram;

[0033] Figure 5 This is an example. Figure 4 Internal diagram;

[0034] Figure 6 This is a schematic diagram of the exploded structure of the flat fuse device in this embodiment;

[0035] Figure 7 This is a cross-sectional structural diagram of the flat fuse device in this embodiment.

[0036] Figure label:

[0037] 10. Outer casing;

[0038] 20. Conductive circuit; 21. Terminal block; 22. Fuse; 23. Pre-break; 24. Bending opening; 25. Cutting groove;

[0039] 30. Cutting structure; 31. Protective component; 32. Pressure component; 321. Notch; 33. Sharp component;

[0040] 40. Arc extinguishing structure; 41. Arc ignition component; 42. Arc extinguishing groove; 50. Power source. Detailed Implementation

[0041] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0042] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] 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 at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0047] See Figures 1-2 This utility model provides a flat fuse device, including a housing, a conductive circuit 20, a cutting structure 30, an arc-extinguishing structure 40, and a power source 50. The conductive circuit 20 includes two terminals 21 extending from opposite ends of the housing and a fuse portion 22 disposed within the housing and connected to the two terminals 21. The cutting structure 30 is slidably disposed within the housing along the width direction of the conductive circuit 20 (as shown in the figure, where the X-axis direction is the width direction and the Y-axis direction is the height direction) and located on one side of the fuse portion 22, for cutting off the fuse portion 22. The arc-extinguishing structure 40 is disposed within the housing and located on the side of the fuse portion 22 opposite to the cutting structure 30. The power source 50 is disposed within the housing along the width direction of the conductive circuit 20 and is opposite to the connecting groove position. The power source 50 can push the pressure member 32.

[0048] Understandably, by dividing the conductive circuit 20 into two terminals 21 and a fuse part 22, the conductive circuit 20 is made easier to cut off. At the same time, the cutting structure 30 is arranged along the X-axis of the conductive circuit 20, which makes the whole structure flattened, thereby reducing the overall size, occupying less space, facilitating installation, and allowing use in various confined spaces. By arranging the power source 50 along the X-axis of the conductive circuit 20, the overall size is further reduced.

[0049] Combination Figure 2-5 As shown, the width of the fuse section 22 is smaller than the width of the two terminals 21, so that a cutting groove 25 is formed between the two terminals 21, and the cutting structure 30 is located in the cutting groove 25.

[0050] Understandably, by setting the width of the fuse section 22 to be smaller than the width of the two terminals 21, a space is formed that can accommodate the cut-off structure 30, further reducing the overall volume and facilitating the cutting of the fuse section 22.

[0051] Combination Figure 2 and Figure 3 As shown, the two ends of the fuse section 22 are integrally connected to the two terminals 21, and the two ends of the fuse section 22 are respectively provided with pre-break 23, and the opening direction of the two pre-break 23 is facing the cutting structure 30.

[0052] Understandably, by setting two pre-break points 23 on the fuse part 22, the connection positions between the two ends of the fuse part 22 and the two terminals 21 can be cut off simultaneously, thereby reducing the risk of leakage due to incomplete cutting and the generation of electric arc.

[0053] Combination Figure 2 and Figure 3 As shown, the fused section 22 has a bend 24 located between two pre-break points 23, and the bend 24 is located on the side of the fused section 22 opposite to the cutting groove 25.

[0054] Understandably, by opening a bend 24 in the fuse section 22, it is easier for the fuse section 22 to be cut off. Setting the bend 24 in the middle of the two pre-break points 23 further reduces the brief contact caused by deformation between the fuse section 22 and the two terminals 21 at the moment of cutting off.

[0055] Combination Figure 2-5 As shown, the cutting structure 30 includes a protective member 31 and a pressure member 32. The protective member 31 is hollow and fixedly installed in the cutting groove 25. One end of the protective member 31 abuts against two pre-cut ends 23. The pressure member 32 is slidably disposed in the protective member 31, with one end of the pressure member 32 facing the two pre-cut ends 23.

[0056] Understandably, by placing the protective element 31 inside the cutting groove 25, it is possible to prevent the electric arc generated when the fused part 22 is cut off, and by aligning the pressure element 32 with the two pre-cut ends 23, it is easier to cut more smoothly.

[0057] Combination Figure 2-5 As shown, the cutting structure 30 also includes a sharp member 33. The pressure member 32 has a notch 321 on the side near the melting part 22. The sharp member 33 is positioned opposite the bending opening 24 and there is a gap between it and the bending opening 24.

[0058] Understandably, by placing the sharp member 33 in the opposite position to the pressure member 32, the fusible part 22 can undergo a deformation process away from the two terminals 21 when it is cut off, which further reduces the arc energy.

[0059] Combination Figure 2-7 As shown, the cutting structure 30 also includes a connecting groove, which is opened on the side of the pressure member 32 opposite to the recessed groove 321, and is spaced apart from the power source 50.

[0060] Understandably, by creating the notch 321 on the pressure member 32, it facilitates the placement of the cut-off part 22 and provides deformation space for the cut-off part 22, further reducing the arc energy.

[0061] Combination Figure 2-7 As shown, an arc-extinguishing groove 42 is provided inside the outer casing 10. The arc-extinguishing groove 42 is located on the side of the fusible part 22 away from the cutting groove 25. The arc-extinguishing structure 40 includes at least one arc-initiating element 41 (in this solution, there are two arc-initiating elements 41 respectively located on both sides of the sharp element 33). All arc-initiating elements 41 are fixedly connected in the arc-extinguishing groove 42, and the sharp element 33 is fixedly connected in the arc-extinguishing groove 42.

[0062] Understandably, by confining the electric arc generated after the fuse part 22 is cut off within the arc extinguishing groove 42, and simultaneously attracting it with the two arc-initiating elements 41 provided in this solution, the electric arc energy is further reduced.

[0063] Combination Figure 2-7 As shown, the arc extinguishing structure 40 also includes: one or more sealing elements (two in this scheme), all sealing elements are sequentially sleeved on the pressure element 32, and all sealing elements abut against the inner wall of the protective element 31.

[0064] Understandably, by placing the seal on the pressure member 32, it is easier to reduce the arc flow generated by the pressure member 32 at the moment of cutting off the fusible part 22.

[0065] The working principle of the flat fuse device is as follows: when it is necessary to cut off the conductive circuit 20, the power source 50 starts to push the pressure member 32, so that the pressure member 32 is at the two pre-break points 23. Then the power source 50 continues to push the pressure member 32 to cut off the fuse part 22. At the same time as cutting off, the bend 24 contacts the sharp member 33, so the fuse part 22 begins to deform. After the complete cut-off, the electric arc is attracted by the arc igniter 41, and the sharp member 33 and the fuse part 22 are located in the notch 321.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A flat fuse device, characterized in that, include: Outer shell (10); The conductive circuit (20) includes two terminals (21) extending from opposite ends of the housing (10) and a fuse (22) disposed within the housing (10) and connected to the two terminals (21); A cutting structure (30) is slidably disposed within the housing (10) along the width direction of the conductive circuit (20) and located on one side of the fusible portion (22), for cutting off the fusible portion (22); and An arc-extinguishing structure (40) is disposed inside the housing (10) and located on the side of the fuse portion (22) away from the cutting structure (30).

2. The flat fuse device according to claim 1, characterized in that, The width of the fuse section (22) is smaller than the width of the two terminals (21) to form a cutting groove (25) between the two terminals (21), and the cutting structure (30) is located in the cutting groove (25).

3. The flat fuse device according to claim 2, characterized in that, The two ends of the fuse section (22) are integrally connected to the two terminals (21), and the two ends of the fuse section (22) are respectively provided with pre-breaks (23), and the opening direction of the two pre-breaks (23) is set towards the cutting structure (30).

4. The flat fuse device according to claim 3, characterized in that, The fused section (22) has a bend (24) located between the two pre-breaks (23), and the bend (24) is located on the side of the fused section (22) opposite to the cutting groove (25).

5. The flat fuse device according to claim 4, characterized in that, The cutting structure (30) includes: A protective element (31) is hollow and fixedly installed in the cutting groove (25), one end of which abuts against the two pre-cut ends (23); and Pressure element (32) is slidably disposed within the protective element (31), with one end of the pressure element (32) facing the two pre-breaks (23).

6. The flat fuse device according to claim 5, characterized in that, The cutting structure (30) also includes a sharp member (33). The pressure member (32) has a notch (321) on the side near the fusion section (22). The sharp member (33) is positioned opposite the bending opening (24) and there is a gap between it and the bending opening (24).

7. The flat fuse device according to claim 6, characterized in that, The pressure member (32) is provided with a connecting groove, which is located on the side of the pressure member (32) opposite to the recessed groove (321).

8. The flat fuse device according to claim 6, characterized in that, An arc-extinguishing groove (42) is provided inside the outer casing (10), and the arc-extinguishing groove (42) is located on the side of the fuse part (22) away from the cutting groove (25); The arc extinguishing structure (40) includes at least one arc-initiating element (41), all of the arc-initiating elements (41) are fixedly connected in the arc extinguishing groove (42), and the sharp element (33) is fixedly connected in the arc extinguishing groove (42).

9. The flat fuse device according to claim 6, characterized in that, The arc-extinguishing structure (40) further includes: One or more seals, all of which are sequentially fitted onto the pressure member (32), and all of which abut against the inner wall of the protective member (31).

10. The flat fuse device according to claim 7, characterized in that, It also includes the power source (50): The power source (50) is disposed inside the housing (10) along the width direction of the conductive circuit (20) and is opposite to the position of the connecting groove. The power source (50) is capable of pushing the pressure member (32).

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