Fuse

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a fuse, which comprises a shell, a fuse, a connector and a conductor piece. The shell is provided with an accommodating cavity with two open ends; the fuse is positioned in the accommodating cavity; the connector is connected to the shell; the conductor piece is arranged in the accommodating cavity, the first end of the conductor piece is conductively connected with the fuse, and the second end of the conductor piece is conductively connected with the connector, so that thermal isolation can be performed between the fuse and the connector, heat generated on the fuse and the connector is prevented from being directly conducted to each other, and on one hand, interference of heat generated on the connector on the fuse is reduced; on the other hand, the interference of heat generated on the fuse on the connector can be reduced, the connector is prevented from being burnt out accidentally when the fuse is overheated, and the service life of the connector is prolonged. And the current-carrying capability of the fuse can be adjusted by changing the model of the conductor piece, so that the fuse can be applied to fusing protection scenes of various current specifications.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a fuse. Background Technology

[0002] A photovoltaic (PV) fuse is a connection product used in the wiring harness system of a photovoltaic power station to protect the system. Some existing PV fuses consist of a housing, a fuse, lead cables, and connectors. The fuse is housed inside the housing, while the lead cables and connectors are fixed to opposite ends of the housing, with the fuse's two ends electrically connected to both the lead cables and connectors. When an overload occurs in the wiring harness system, the fuse in the PV fuse blows, thus cutting off the faulty circuit and protecting the system.

[0003] Existing photovoltaic fuses have the following drawbacks: Firstly, due to direct heat transfer between the fuse and the connector, the heat generated on both affects each other, shortening the lifespan of either the fuse or the connector. For example, when the connector experiences poor contact, the heat generated increases, which is then transferred to the fuse, causing it to melt prematurely, resulting in shortened lifespan and abnormal melting. Secondly, once the fuse and connector models are determined, their current-carrying capacity cannot be changed, making them unsuitable for fuse protection with various current specifications. Moreover, mating connectors are often selected from the same brand, as these connectors have undergone extensive safety verification, offering high safety and better electrical contact. To ensure high safety and good electrical contact, existing fuses typically only match connectors from the same brand, resulting in poor compatibility and a limited range of applications. Furthermore, existing fuses usually use external cables to connect the connectors, which is costly, has numerous connection points, and carries a higher risk of failure.

[0004] Therefore, there is an urgent need for a fuse to solve the aforementioned problems in the existing technology. Utility Model Content

[0005] The purpose of this invention is to provide a fuse that can reduce the heat conduction efficiency between the fuse and the connector, avoid mutual interference between their heat generation, adjust the current carrying capacity of the fuse to be applied to various current specification fuse protection scenarios, be compatible with the connection of different brand connectors, reduce the number of sealed connection points, and reduce the risk of failure.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A fuse is provided, comprising:

[0008] The outer casing has a receiving cavity with openings at both ends;

[0009] A fuse, the fuse being located within the receiving cavity;

[0010] A connector, which is connected to the housing;

[0011] A conductor is disposed within the accommodating cavity, with a first end of the conductor electrically connected to the fuse and a second end of the conductor electrically connected to the connector.

[0012] As an optional solution to the fuse provided by this utility model, the fuse further includes a first sealing ring;

[0013] The first end of the outer casing is provided with a mounting groove that communicates with the accommodating cavity, and the first sealing ring is located in the mounting groove;

[0014] The connector includes a connected external threaded cylinder and a clamping boss. The clamping boss protrudes from the outer periphery of the external threaded cylinder. The external threaded cylinder passes through the first sealing ring and is screwed into the receiving cavity. The clamping boss presses the first sealing ring into the mounting groove.

[0015] As an optional solution for the fuse provided by this utility model, the first sealing ring has a first protruding ring on the end face facing the pressing boss, and the first protruding ring is in sealing contact with the pressing boss.

[0016] As an optional solution for the fuse provided by this utility model, the end face of the first sealing ring facing away from the pressing boss is provided with a second protruding ring, and the second protruding ring is in sealing contact with the bottom wall of the mounting groove.

[0017] As an optional solution for the fuse provided by this utility model, the bottom wall of the mounting groove is provided with a third convex ring or a sealing ring groove, and the first sealing ring is in extrusion contact with the third convex ring or in extrusion contact with the inner wall of the sealing ring groove.

[0018] As an optional solution for the fuse provided by this utility model, the first sealing ring includes a ring body and a fourth protruding ring protruding from the end face of the ring body. The inner diameter of the fourth protruding ring gradually increases in the direction away from the ring body, and the minimum inner diameter of the fourth protruding ring is greater than the inner diameter of the ring body.

[0019] The clamping boss extends into the fourth protruding ring and presses against the inner wall of the ring body and the fourth protruding ring.

[0020] As an optional solution for the fuse provided by this utility model, the fuse is provided with a first socket, and the first end of the conductor is provided with a first plug-in part, which is inserted into the first socket and makes conductive contact with the inner wall of the first socket.

[0021] And / or, the connector includes a connector housing and a conductive pin disposed within the connector housing, the connector housing being connected to the outer shell, the conductive pin being provided with a second socket; the second end of the conductor being provided with a second insertion portion; the second insertion portion being inserted into the second socket and making conductive contact with the inner wall of the second socket.

[0022] As an optional solution for the fuse provided by this utility model, the conductor includes a cable.

[0023] As an optional solution for the fuse provided by this utility model, the inner wall of the accommodating cavity is provided with a first limiting boss;

[0024] The outer wall of the fuse is provided with a second limiting boss. The fuse passes through the cavity along one end opening of the cavity and abuts against the first limiting boss through the second limiting boss.

[0025] As an optional solution for the fuse provided by this utility model, the fuse also includes a second sealing ring, a lead cable, and a locking nut;

[0026] The second sealing ring includes a first sealing part and a second sealing part coaxially connected. The outer diameter of the first sealing part is smaller than the outer diameter of the second sealing part and gradually decreases in the direction away from the second sealing part. The first sealing part passes through the receiving cavity, and the second sealing part is located outside the receiving cavity.

[0027] The locking nut is sleeved outside the second sealing part and threadedly connected to the outer shell;

[0028] The lead cable passes through the locking nut and the second sealing ring and is electrically connected to the end of the fuse away from the conductor.

[0029] The beneficial effects of this utility model are:

[0030] The fuse provided by this utility model, by incorporating a conductor and electrically connecting its two ends to a fuse and a connector respectively, simultaneously enables current flow between the fuse and connector while providing thermal isolation between them. This prevents heat generated on both surfaces from being directly conducted to each other, reducing heat transfer efficiency. On one hand, it reduces interference from heat generated on the connector to the fuse, preventing abnormal fuse blowing, avoiding a decrease in the fuse's current-carrying capacity, improving the accuracy of the fuse's fusing mechanism, and extending the fuse's lifespan. On the other hand, it reduces interference from heat generated on the fuse to the connector, preventing accidental burnout of the connector when the fuse overheats, thus extending the connector's lifespan. Furthermore, by changing the type of the conductor, the current-carrying capacity of the fuse can be adjusted, allowing the fuse to be applied to various current-specification protection scenarios, improving its flexibility of use. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model 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 the drawings without creative effort.

[0032] Figure 1 This is an isometric view of the fuse provided in a specific embodiment of this utility model;

[0033] Figure 2 This is an exploded view of the fuse provided in a specific embodiment of this utility model;

[0034] Figure 3 This is a first cross-sectional view of the fuse provided in a specific embodiment of this utility model;

[0035] Figure 4 This is a second cross-sectional view of the fuse provided in a specific embodiment of this utility model;

[0036] Figure 5 This is a third cross-sectional view of the fuse provided in a specific embodiment of this utility model;

[0037] Figure 6 This is a cross-sectional view of the fuse housing provided in a specific embodiment of this utility model;

[0038] Figure 7 yes Figure 3 A magnified view of a section at point A in the middle;

[0039] Figure 8 This is a schematic diagram of the first mating of the first sealing ring and the mounting groove according to a specific embodiment of the present invention;

[0040] Figure 9 This is a schematic diagram of the second mating of the first sealing ring and the mounting groove in a specific embodiment of the present invention;

[0041] Figure 10 This is an isometric view of the first sealing ring of the fuse provided in a specific embodiment of this utility model;

[0042] Figure 11 This is a cross-sectional view of the first sealing ring of the fuse provided in a specific embodiment of this utility model;

[0043] Figure 12 This is a schematic diagram showing the connection between the outer shell, the second sealing ring, the lead cable, and the locking nut provided in a specific embodiment of this utility model;

[0044] Figure 13 yes Figure 3 A magnified view of a section at point B.

[0045] In the picture:

[0046] 1. Housing; 2. Fuse; 3. Connector; 4. Conductor; 5. First sealing ring; 6. Second sealing ring; 7. Lead-out cable; 8. Locking nut;

[0047] 11. Receiving cavity; 12. Mounting groove; 13. First limiting boss; 121. Third protruding ring; 122. Sealing ring groove;

[0048] 21. First insertion hole; 22. Second limiting boss;

[0049] 31. Connector housing; 32. Conductive pin;

[0050] 311. External threaded cylinder; 312. Clamping boss; 321. Second insertion hole;

[0051] 41. First connector; 42. Second connector;

[0052] 51. First convex ring; 52. Second convex ring; 53. Ring body; 54. Fourth convex ring;

[0053] 541. Pushing inclined plane;

[0054] 61. First sealing part; 62. Second sealing part. Detailed Implementation

[0055] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0056] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 utility model based on the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0059] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0060] In the embodiments of this utility model, the same reference numerals denote the same parts, and for the sake of brevity, detailed descriptions of the same parts are omitted in different embodiments.

[0061] like Figure 1 , Figure 2 as well as Figure 3 As shown, this embodiment provides a fuse, including a housing 1, a fuse 2, a connector 3, and a conductor 4. This fuse can reduce the heat conduction efficiency between the fuse 2 and the connector 3, preventing their heat generation from affecting each other. Simultaneously, it can adjust the current-carrying capacity of the fuse to be applied in various current-specification fusing protection scenarios.

[0062] Specifically, the housing 1 has a receiving cavity 11 with openings at both ends, meaning the receiving cavity 11 extends through the first and second ends of the housing 1, and the fuse 2 is located within the receiving cavity 11. A connector 3 is connected to one end of the housing 1. A conductor 4 is located within the receiving cavity 11, with its first end electrically connected to the fuse 2 and its second end electrically connected to the connector 3; that is, the fuse 2 is electrically connected to the connector 3 through the conductor 4.

[0063] The fuse provided in this embodiment, by setting a conductor 4 and making its two ends electrically connected to the fuse 2 and the connector 3 respectively, can conduct current between the fuse 2 and the connector 3 while thermally isolating them, preventing the heat generated on both from being directly conducted to each other and reducing heat conduction efficiency. On the one hand, it reduces the interference of heat generated on the connector 3 to the fuse 2, preventing the fuse 2 from melting abnormally, avoiding a reduction in the current carrying capacity of the fuse 2, improving the accuracy of the fuse's melting mechanism, and extending the service life of the fuse 2. On the other hand, it reduces the interference of heat generated on the fuse 2 to the connector 3, preventing the connector 3 from being accidentally burned out when the fuse 2 overheats, and extending the service life of the connector 3.

[0064] Furthermore, by changing the model of conductor 4, the current-carrying capacity of the fuse can be adjusted, allowing the fuse to be used in various current-specification protection scenarios, thus improving its flexibility. See details... Figure 3 , Figure 4 as well as Figure 5 , Figure 4 The cross-sectional area of ​​conductor 4 shown is greater than Figure 3 The cross-sectional area of ​​conductor 4 shown is... Figure 5 The conductor 4 shown is less than [a certain length]. Figure 3 The length of conductor 4 shown is such that Figure 3 , Figure 4 as well as Figure 5 The conductors 4 shown have different current-carrying capacities, and therefore the corresponding fuses have different current-carrying capacities. In other words, by installing conductors 4 with different cross-sectional areas and lengths inside the housing 1 and electrically connecting them with the fuse 2 and connector 3, fuses with different current specifications can be formed to protect circuits of corresponding current specifications.

[0065] Optionally, conductor 4 is a cable, specifically a photovoltaic cable. The photovoltaic cable has sufficient structural strength, is easy to thread and assemble, and has a stable internal structure after assembly. Moreover, a photovoltaic cable of appropriate diameter can be selected according to design requirements, and the photovoltaic cable can be cut to a suitable length and assembled inside the fuse housing 1.

[0066] For example, the fuse housing 1 is integrally injection molded from plastic material, which is simple to manufacture and gives the housing 1 sufficient strength and resistance to deformation. The housing cavity 11 of the housing 1 has ample space to accommodate fuses 2 of different specifications and models. Specifically... Figure 3 and Figure 5 , Figure 5 The cross-sectional area of ​​the fuse 2 shown is less than Figure 3 The cross-sectional area of ​​fuse 2 shown is... Figure 5 The length of fuse 2 shown is greater than Figure 3The length of fuse 2 is shown. Both types of fuse 2 can be installed in the housing 1, giving the housing 1 good compatibility and allowing it to accommodate various sizes of fuse 2, as well as various sizes of conductor 4.

[0067] See Figure 2 The fuse 2 is provided with a first socket 21, and the first end of the conductor 4 is provided with a first plug part 41. The first plug part 41 is inserted into the first socket 21 and makes conductive contact with the inner wall of the first socket 21, so that the first end of the conductor 4 and the fuse 2 have sufficient contact area, reduce contact resistance, and make the two conduct well.

[0068] Combination Figure 2 and Figure 3 The connector 3 includes a connector housing 31 and conductive pins 32 disposed within the connector housing 31. The connector housing 31 is fixedly connected to one end of the outer shell 1 to achieve the installation and fixation of the entire connector 3 at one end of the outer shell 1. Exemplarily, the conductive pins 32 pass through the connector housing 31 and engage with the slots provided inside the connector housing 31 through a snap-fit ​​structure provided on the outer wall. The conductive pins 32 are provided with a second insertion hole 321, and the second end of the conductor 4 is provided with a second insertion portion 42. The second insertion portion 42 is inserted into the second insertion hole 321 and makes conductive contact with the inner wall of the second insertion hole 321, so that there is sufficient contact area between the second end of the conductor 4 and the connector 3, reducing contact resistance and ensuring good conductivity between the two.

[0069] The conductor 4 is connected to the fuse 2 and the conductive pin 32 via the first insertion portion 41 and the second insertion portion 42 at both ends, which not only facilitates assembly but also ensures good conductivity after assembly. Furthermore, after the first insertion portion 41 is inserted into the first socket 21 and the second insertion portion 42 is inserted into the second socket 321, they are riveted to fix them, further improving the connection stability between the conductor 4, the fuse 2, and the connector 3.

[0070] Optionally, such as Figure 3 , Figure 6 as well as Figure 7As shown, the fuse also includes a first sealing ring 5, which is used to seal the gap between the connector 3 and the housing 1 to prevent gaps from appearing at the connection. The first end of the housing 1 is provided with a mounting groove 12 communicating with the accommodating cavity 11. The first sealing ring 5 is located in the mounting groove 12 to position the first sealing ring 5. The connector housing 31 includes a connected external threaded cylinder 311 and a pressing boss 312. The pressing boss 312 protrudes from the outer periphery of the external threaded cylinder 311. The first end of the accommodating cavity 11 is provided with an internal thread structure. The external threaded cylinder 311 passes through the first sealing ring 5 and is screwed into the accommodating cavity 11. In cooperation with the internal thread structure, the pressing boss 312 presses the first sealing ring 5 into the mounting groove 12, which on the one hand makes the first sealing ring 5 installed firmly, and on the other hand makes the first sealing ring 5 deform under pressure to fill the gap between the housing 1 and the connector housing 31, thereby improving the sealing performance after installation.

[0071] In some embodiments, the outer diameter of the external threaded cylinder 311 is larger than the inner diameter of the first sealing ring 5. When the external threaded cylinder 311 is screwed into the accommodating cavity 11, the external thread teeth of the external threaded cylinder 311 press against the inner wall of the first sealing ring 5, causing the first sealing ring 5 to deform and ensuring a good seal between the external threaded cylinder 311 and the inner wall of the first sealing ring 5.

[0072] Of course, in other embodiments, the outer diameter of the external threaded cylinder 311 may be equal to or slightly smaller than the inner diameter of the first sealing ring 5. No specific limitation is made on the size of the two here.

[0073] In some embodiments, see Figure 7 , Figure 10 as well as Figure 11 The first sealing ring 5 has a first protruding ring 51 protruding from its end face facing the pressing boss 312, and the first protruding ring 51 makes sealing contact with the pressing boss 312. By providing the first protruding ring 51, when the pressing boss 312 presses the first sealing ring 5, it squeezes the first protruding ring 51, causing the first protruding ring 51 to deform and fill the gap between the pressing boss 312 and the first sealing ring 5, which helps to improve the sealing performance between the pressing boss 312 and the first sealing ring 5.

[0074] In some embodiments, see Figure 7 and Figure 11 A second protruding ring 52 protrudes from the end face of the first sealing ring 5 facing away from the pressing boss 312, and the second protruding ring 52 makes sealing contact with the bottom wall of the mounting groove 12. By setting the second protruding ring 52, when the pressing boss 312 squeezes the first sealing ring 5, the second protruding ring 52 deforms under the squeezing force, thereby filling the gap between the first sealing ring 5 and the bottom wall of the mounting groove 12, ensuring a good seal between the first sealing ring 5 and the bottom wall of the mounting groove 12.

[0075] In some embodiments, see Figure 8 Alternatively, a third protruding ring 121 can be provided on the bottom wall of the mounting groove 12. In this case, the end face of the first sealing ring 5 facing away from the pressing boss 312 can be flat. When the connector 3 is tightened, the end face of the first sealing ring 5 facing away from the pressing boss 312 and the third protruding ring 121 are pressed together to form a sealing point, which can also achieve a good sealing effect. Alternatively, the end face of the first sealing ring 5 facing away from the pressing boss 312 can be an annular groove. When the connector 3 is tightened, the inner wall of the annular groove is pressed together with the third protruding ring 121 to form a sealing point.

[0076] Alternatively, in other embodiments, see Figure 9 Alternatively, a sealing ring groove 122 can be provided on the bottom wall of the mounting groove 12. In this case, the end face of the first sealing ring 5 facing away from the pressing boss 312 can be flat. When the connector 3 is tightened, the end face of the first sealing ring 5 facing away from the pressing boss 312 can be squeezed into the sealing ring groove 122 under the pressure to form a sealing point. Alternatively, a fifth protruding ring can be provided on the end face of the first sealing ring 5 facing away from the pressing boss 312. When the connector 3 is tightened, the fifth protruding ring can be squeezed into the sealing ring groove 122 under the pressure to form a sealing point.

[0077] In this embodiment, see Figure 7 , Figure 10 as well as Figure 11 The first sealing ring 5 includes a ring body 53 and a fourth protruding ring 54 protruding from the end face of the ring body 53. The first protruding ring 51 and the second protruding ring 52 are respectively protruding from the opposite end faces of the ring body 53. The fourth protruding ring 54 is coaxially arranged with the ring body 53 and spaced apart from the first protruding ring 51. The inner diameter of the fourth protruding ring 54 gradually increases in the direction away from the ring body 53, and the minimum inner diameter of the fourth protruding ring 54 is greater than the inner diameter of the ring body 53. The pressing boss 312 extends into the fourth protruding ring 54 and presses against the inner walls of the ring body 53 and the fourth protruding ring 54. That is, the inner wall surface of the fourth convex ring 54 forms a pushing slope 541. The inner ring opening of the fourth convex ring 54 formed by the pushing slope 541 is funnel-shaped. On the one hand, this facilitates the insertion of the pressing boss 312 into the interior of the fourth convex ring 54. On the other hand, because the pressing boss 312 presses against the pushing slope 541, the fourth convex ring 54 elastically deforms outward under pressure, thereby making the outer wall of the fourth convex ring 54 in sealing contact with the inner sidewall of the mounting groove 12, which helps to improve the sealing performance between the first sealing ring 5 and the inner sidewall of the mounting groove 12. Furthermore, the outer wall surface of the ring body 53 is flush with the outer wall surface of the fourth convex ring 54, making manufacturing easier.

[0078] The first sealing ring 5 provided in this embodiment can ensure the sealing performance between the inner wall of the first sealing ring 5 and the external threaded cylinder 311 of the connector 3 through the interference fit between its inner wall and the external threaded cylinder 311. By setting the first convex ring 51, the second convex ring 52 and the fourth convex ring 54, after the pressing boss 312 presses the first sealing ring 5 to make the first sealing ring 5 elastically deform, it can ensure that the first sealing ring 5 has a reliable and good seal with the pressing boss 312, the bottom wall of the mounting groove 12 and the inner side wall of the mounting groove 12 respectively.

[0079] Furthermore, threaded sleeve 311 can be coated with thread sealant before being screwed into receiving cavity 11, making the connector 3 and housing 1 non-removable after assembly, which helps to further improve the connection strength and sealing between the two.

[0080] For several connectors 3 of the same type but different specifications, the threads on their external threaded cylinders 311 are consistent, and the outer diameter of their clamping bosses 312 is not much different. Therefore, the same type of first sealing ring 5 can be used for sealing.

[0081] In this embodiment, see Figure 2 , Figure 3 and Figure 12 The fuse also includes a second sealing ring 6, a lead cable 7, and a locking nut 8. The second sealing ring 6 includes a first sealing part 61 and a second sealing part 62 coaxially connected. The outer diameter of the first sealing part 61 is smaller than the outer diameter of the second sealing part 62 and gradually decreases in the direction away from the second sealing part 62. That is, the outer wall surface of the first sealing part 61 is inclined and its whole shape is conical. The first sealing part 61 passes through the second end of the receiving cavity 11, and the second sealing part 62 is located outside the receiving cavity 11. The second end of the outer shell 1 is provided with an external thread structure. The locking nut 8 is sleeved on the second sealing part 62 and is threadedly connected to the second end of the outer shell 1 through the external thread structure. The lead cable 7 passes through the locking nut 8 and the second sealing ring 6 and is electrically connected to the end of the fuse 2 away from the conductor 4. Since the first sealing part 61 is conical, it is easier to insert into the accommodating cavity 11. As the locking nut 8 is turned, it applies pressure to the second sealing part 62, so that the first sealing part 61 gradually fits tightly with the inner wall of the accommodating cavity 11, thereby improving the sealing performance of the second sealing ring 6 between the accommodating cavity 11 and the locking nut 8.

[0082] In this embodiment, see Figure 1 and Figure 2Because the first end of the fuse housing 1 is provided with an internal threaded hole and a mounting groove 12 forming a stepped hole structure with the internal threaded hole, the connector 3 can be directly threaded onto the fuse housing 1 through the external threaded cylinder 311. The connector 3 is positioned and installed on the housing 1 by the stepped surface formed between the external threaded cylinder 311 and the clamping boss 312, and a seal is achieved between the connector 3 and the housing 1 by pressing the first sealing ring 5 within the mounting groove 12. The structure of the housing 1 is adaptable to connection with connectors 3 from different brands; only the internal thread structure of the housing 1 needs to be modified according to the external thread structure of the connector 3 to be connected.

[0083] It is understandable that when injection molding the housing 1, different internal thread inserts and external thread inserts can be replaced according to the models of the locking nut 8 and the connector housing 31, so that the injection mold can produce a housing 1 that is compatible with the corresponding locking nut 8 and connector housing 31 models.

[0084] Combination Figure 1 and Figure 3 The fuse provided in this embodiment has a connector 3 fixedly mounted on its first end. Compared with the scheme where the first end is led out through a wire harness and then connected to the connector 3 through the wire harness, this reduces the number of sealing points, lowers the risk, improves the waterproof and dustproof effect, and is more reliable in use. The second end of the fuse is led out through a lead cable 7, which can be directly connected to an electronic connector, or directly connected to a branch connector or junction box, etc., according to design requirements.

[0085] In some embodiments, such as Figure 3 , Figure 6 as well as Figure 13 As shown, the inner wall of the receiving cavity 11 is provided with a first limiting boss 13; the outer wall of the fuse 2 is provided with a second limiting boss 22. The fuse 2 passes through the first end opening of the receiving cavity 11 and abuts against the first limiting boss 13 through the second limiting boss 22. On the one hand, it positions the fuse 2 in the receiving cavity 11, and on the other hand, it ensures that the fuse 2 is installed stably and does not shake when the lead cable 7 is pulled, so as to avoid damaging the connection between the two ends of the fuse 2 and the lead cable 7 and the conductor 4.

[0086] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A fuse, characterized in that, include: The outer shell (1) is provided with a receiving cavity (11) with openings at both ends; A fuse (2) is located within the receiving cavity (11); Connector (3), which is connected to the housing (1); Conductor (4), the conductor (4) is disposed in the accommodating cavity (11), the first end of the conductor (4) is electrically connected to the fuse (2), and the second end of the conductor (4) is electrically connected to the connector (3).

2. The fuse according to claim 1, characterized in that, The fuse also includes a first sealing ring (5); The first end of the outer shell (1) is provided with a mounting groove (12) that communicates with the accommodating cavity (11), and the first sealing ring (5) is located in the mounting groove (12); The connector (3) includes a connected external threaded cylinder (311) and a clamping boss (312). The clamping boss (312) protrudes from the outer periphery of the external threaded cylinder (311). The external threaded cylinder (311) passes through the first sealing ring (5) and is screwed into the receiving cavity (11). The clamping boss (312) presses the first sealing ring (5) into the mounting groove (12).

3. The fuse according to claim 2, characterized in that, The first sealing ring (5) has a first protruding ring (51) on the end face facing the pressing boss (312), and the first protruding ring (51) is in sealing contact with the pressing boss (312).

4. The fuse according to claim 2, characterized in that, The first sealing ring (5) has a second protruding ring (52) protruding from the end face of the pressing boss (312) facing away from it. The second protruding ring (52) is in sealing contact with the bottom wall of the mounting groove (12).

5. The fuse according to claim 2, characterized in that, The bottom wall of the mounting groove (12) is provided with a third protruding ring (121) or a sealing ring groove (122), and the first sealing ring (5) is in extrusion contact with the third protruding ring (121) or in extrusion contact with the inner wall of the sealing ring groove (122).

6. The fuse according to claim 2, characterized in that, The first sealing ring (5) includes a ring body (53) and a fourth protruding ring (54) protruding from the end face of the ring body (53). The inner diameter of the fourth protruding ring (54) gradually increases in the direction away from the ring body (53), and the minimum inner diameter of the fourth protruding ring (54) is greater than the inner diameter of the ring body (53). The pressing boss (312) extends into the fourth protruding ring (54) and presses against the inner wall of the ring body (53) and the fourth protruding ring (54).

7. The fuse according to any one of claims 1-6, characterized in that, The fuse (2) is provided with a first socket (21), and the first end of the conductor (4) is provided with a first plug-in part (41). The first plug-in part (41) is inserted into the first socket (21) and makes conductive contact with the inner wall of the first socket (21). And / or, the connector (3) includes a connector housing (31) and a conductive pin (32) disposed in the connector housing (31), the connector housing (31) is connected to the outer shell (1), the conductive pin (32) is provided with a second socket (321); the second end of the conductor (4) is provided with a second insertion part (42); the second insertion part (42) is inserted into the second socket (321) and makes conductive contact with the inner wall of the second socket (321).

8. The fuse according to any one of claims 1-6, characterized in that, The conductor (4) includes a cable.

9. The fuse according to any one of claims 1-6, characterized in that, The inner wall of the accommodating cavity (11) is provided with a first limiting boss (13); The fuse (2) has a second limiting boss (22) protruding from its outer wall. The fuse (2) passes through the cavity (11) through one end opening and abuts against the first limiting boss (13) through the second limiting boss (22).

10. The fuse according to any one of claims 1-6, characterized in that, The fuse also includes a second sealing ring (6), a lead cable (7), and a locking nut (8); The second sealing ring (6) includes a first sealing part (61) and a second sealing part (62) coaxially connected. The outer diameter of the first sealing part (61) is smaller than the outer diameter of the second sealing part (62) and gradually decreases in the direction away from the second sealing part (62). The first sealing part (61) passes through the receiving cavity (11), and the second sealing part (62) is located outside the receiving cavity (11). The locking nut (8) is sleeved on the outside of the second sealing part (62) and threadedly connected to the outer shell (1); The lead cable (7) passes through the locking nut (8) and the second sealing ring (6) and is electrically connected to the end of the fuse (2) away from the conductor (4).

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