A k-type fusible link

Abstract

The utility model relates to K type fuse wire technical field, concretely is a kind of K type fuse wire, the utility model includes fuse, recess ring one and recess ring two are set up in the side wall of fuse, the depth of recess ring one is greater than the depth of recess ring two, the length of recess ring one is equal to the length of recess ring two, the fuse includes matrix layer, the material of matrix layer is silver copper alloy, matrix layer inside evenly distributed has dispersion layer, the material of dispersion layer is nano alumina particle, matrix layer outside is coated with surface coating, the material of surface coating is low melting point metal tin;Through the matrix layer of silver copper alloy guarantee its high efficient conductivity, the dispersion layer of nano alumina particle promotes the current-carrying capacity of fuse, low melting point metal tin shortens fusing response time, changes the connection position of fuse, current passes through recess ring one or recess ring two, the depth of two is different, and the current-carrying capacity is different, thereby adapt to high current or low current, improve the accurate fusing capacity of fuse wire.

Description

Technical Field

[0001] This utility model relates to the field of K-type fuses, specifically a K-type fuse. Background Technology

[0002] When a circuit malfunctions or becomes abnormal, the current continuously increases. This increased current may damage some important components in the circuit, burn out the circuit, or even cause a fire. By installing a K-type fuse in the circuit, when the current abnormally rises to a certain level and temperature, the fuse melts and cuts off the current, thereby protecting the circuit and ensuring its safe operation. It serves as an overcurrent protection element.

[0003] The fusing rate and current resistance of existing traditional fuses need to be improved. They are also prone to oxidation and cannot be used for precise fusing at high or low currents. Therefore, a K-type fuse is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a K-type fuse to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A type K fuse includes a fuse wire, wherein a recessed ring 1 and a recessed ring 2 are formed on the sidewall of the fuse wire, the depth of the recessed ring 1 is greater than the depth of the recessed ring 2, and the length of the recessed ring 1 is equal to the length of the recessed ring 2.

[0007] The fuse includes a base layer made of silver-copper alloy, a dispersion layer uniformly distributed inside the base layer made of nano-alumina particles, and a surface coating on the outside of the base layer made of low-melting-point tin.

[0008] Preferably, the fuse is provided with an insulating covering cylinder, and a conductive cylinder is slidably connected to one end of the fuse. The outer wall of the conductive cylinder is connected to the inner wall of the insulating covering cylinder, and the inner wall of the conductive cylinder is connected to the side wall of the fuse.

[0009] Preferably, the inner wall of the conductive cylinder is provided with an internal thread, and the side wall of the fuse is provided with a first thread and a second thread. The first thread is located inside the insulating covering cylinder, and the second thread is located between the first recessed ring and the second recessed ring. The first recessed ring is located between the first thread and the second thread, and both the first thread and the second thread are connected and engaged with the internal thread.

[0010] Preferably, the inner wall of the insulating coating cylinder is provided with a long thread, and the outer wall of the conductive cylinder is provided with a short thread corresponding to the position of the inner thread. The short thread is connected to the long thread, and the outer wall of the conductive cylinder is provided with an identification ring one and an identification ring two.

[0011] Preferably, the conductive cylinder has a cavity inside, one end of the fuse is located in the cavity, a sliding seat is slidably installed in the cavity, a spring is snapped between the sliding seat and the inner wall of the conductive cylinder, the spring is in a compressed state, and the sliding seat is inserted into one end of the fuse.

[0012] Preferably, a first protrusion is fixedly connected to the inner wall of the cavity, a second protrusion is fixedly connected to one end of the sliding seat, and both ends of the spring are respectively engaged with the first protrusion and the second protrusion.

[0013] The beneficial effects of this utility model are:

[0014] This invention ensures high conductivity through a silver-copper alloy matrix layer, enhances the current resistance of the fuse by a dispersion layer of nano-alumina particles, delays fuse aging, uses low-melting-point tin as a surface coating to shorten the fuse response time, and changes the connection position of the fuse so that the current passes through either concave ring one or concave ring two, which have different depths and different current conduction capabilities, thereby adapting to high or low current and improving the precise fusing capability of the fuse. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the fuse structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the conductive cylinder of this utility model;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the fuse in this utility model;

[0021] The attached figures are labeled as follows:

[0022] 1. Fuse wire; 2. Insulating sheath; 3. Conductive cylinder; 4. Long thread; 5. Cavity; 6. Protrusion 1; 7. Spring; 8. Sliding seat; 9. Protrusion 2; 10. Marking ring 1; 11. Marking ring 2; 12. Short thread; 13. Internal thread; 14. Thread 1; 15. Thread 2; 16. Recessed ring 1; 17. Recessed ring 2; 18. Base layer; 19. Dispersion layer; 20. Surface coating. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] A type K fuse, such as Figures 1-5 As shown, the fuse includes a fuse 1. The sidewall of the fuse 1 has a recessed ring 16 and a recessed ring 17. The depth of the recessed ring 16 is greater than the depth of the recessed ring 17, and the length of the recessed ring 16 is equal to the length of the recessed ring 17. The deeper the recessed ring, the smaller the diameter of the fuse and the worse the current conduction. The difference in depth between the recessed ring 16 and the recessed ring 17 creates a local resistance difference, which precisely controls the melting position and avoids random melting.

[0025] By changing the connection position of fuse 1, when the current passes through recessed ring 16 and recessed ring 27, the K-type fuse will melt at low current. When the current passes through recessed ring 27, the K-type fuse will melt at high current, making the fuse suitable for different scenarios.

[0026] The fuse 1 includes a base layer 18, which is made of silver-copper alloy. A dispersion layer 19 is uniformly distributed inside the base layer 18. The dispersion layer 19 is made of nano-alumina particles. The base layer 18 is coated with a surface coating 20, which is made of low-melting-point tin.

[0027] The innovative material of fuse 1 uses a composite melt material, with a silver-copper alloy as the base layer 18 to ensure its high conductivity. The uniformly distributed nano-alumina particles in the base layer 18 improve the material's high temperature resistance and suppress electric arc. The uniformly distributed particles can refine the grains and delay the aging of fuse 1. The low-melting-point metallic tin covering the base layer 18 melts preferentially during overcurrent to form a "fusible trigger point" and shorten the response time.

[0028] An insulating sheath 2 is provided on the outside of the fuse 1. A conductive cylinder 3 is slidably connected to one end of the fuse 1. The outer wall of the conductive cylinder 3 is connected to the inner wall of the insulating sheath 2, and the inner wall of the conductive cylinder 3 is connected to the side wall of the fuse 1.

[0029] The conductive cylinder 3 is conductive, and the insulating covering cylinder 2 and the conductive cylinder 3 are sealed together. The conductive cylinder 3 is electrically connected to the fuse 1.

[0030] The inner wall of the conductive cylinder 3 is provided with an internal thread 13, and the side wall of the fuse 1 is provided with a first thread 14 and a second thread 15. The first thread 14 is located inside the insulating covering cylinder 2, and the second thread 15 is located between the first recessed ring 16 and the second recessed ring 17. The first recessed ring 16 is located between the first thread 14 and the second thread 15. Both the first thread 14 and the second thread 15 are connected and engaged with the internal thread 13.

[0031] Tighten the conductive cylinder 3 to connect the internal thread 13 with thread 14 or thread 15, thereby changing whether the current flow path passes through the recessed ring 16.

[0032] The inner wall of the insulating covering cylinder 2 is provided with a long thread 4, and the outer wall of the conductive cylinder 3 is provided with a short thread 12 corresponding to the position of the internal thread 13. The short thread 12 is connected to the long thread 4. The outer wall of the conductive cylinder 3 is provided with a first marking ring 10 and a second marking ring 11.

[0033] The short thread 12 and the long thread 4 connect the insulating sleeve 2 and the conductive sleeve 3, sealing the space between them. The marking ring 10 and the marking ring 21 can determine the length of the conductive sleeve 3 inside the insulating sleeve 2, thus determining whether the internal thread 13 is connected to the thread 14 or the thread 2 15.

[0034] The conductive cylinder 3 has a cavity 5 inside, one end of the fuse 1 is located in the cavity 5, a sliding seat 8 is slidably installed in the cavity 5, a spring 7 is snapped between the sliding seat 8 and the inner wall of the conductive cylinder 3, the spring 7 is in a compressed state, the sliding seat 8 is inserted into one end of the fuse 1, the spring 7, the sliding seat 8 and other structures are all made of insulating material, the fuse 1 and the conductive cylinder 3 are made of conductive material.

[0035] Spring 7 presses against sliding seat 8 to compensate for changes in contact pressure caused by thermal expansion and contraction or vibration, and limits one end of fuse 1 to prevent multiple parts of one end of fuse 1 from contacting conductive cylinder 3 and causing a short circuit.

[0036] The inner wall of cavity 5 is fixedly connected to protrusion 6, one end of sliding seat 8 is fixedly connected to protrusion 9, and the two ends of spring 7 are respectively engaged with protrusion 6 and protrusion 9.

[0037] The spring 7 is fixed by the snap-fit ​​between protrusion 6 and protrusion 9 to prevent it from shifting position.

[0038] The working principle of the K-type fuse provided by this utility model is as follows:

[0039] The silver-copper alloy substrate layer 18 ensures its high conductivity, the nano-alumina particle dispersion layer 19 enhances the current resistance of the fuse 1 and delays the aging of the fuse 1, and the low-melting-point metallic tin is used as a surface coating 20 to shorten the melting response time. By changing the connection position of the fuse 1, the current passes through the first recessed ring 16 or the second recessed ring 17. The two rings have different depths and different current conduction capabilities. The difference in depth between the first recessed ring 16 and the second recessed ring 17 creates a local resistance difference, which precisely controls the melting position, thereby adapting to high or low current and improving the precise melting capability of the fuse.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A type K fuse, comprising a fuse (1), characterized in that, The fuse (1) has a recessed ring one (16) and a recessed ring two (17) on its sidewall. The depth of the recessed ring one (16) is greater than the depth of the recessed ring two (17), and the length of the recessed ring one (16) is equal to the length of the recessed ring two (17). The fuse (1) includes a base layer (18), the material of the base layer (18) is a silver-copper alloy, a dispersion layer (19) is uniformly distributed inside the base layer (18), the material of the dispersion layer (19) is nano-alumina particles, and a surface coating (20) is coated on the outside of the base layer (18), the material of the surface coating (20) is low-melting-point metallic tin.

2. The K-type fuse according to claim 1, characterized in that, An insulating covering cylinder (2) is provided outside the fuse (1). A conductive cylinder (3) is slidably connected to one end of the fuse (1). The outer wall of the conductive cylinder (3) is connected to the inner wall of the insulating covering cylinder (2), and the inner wall of the conductive cylinder (3) is connected to the side wall of the fuse (1).

3. A K-type fuse according to claim 2, characterized in that, The inner wall of the conductive cylinder (3) is provided with an internal thread (13), and the side wall of the fuse (1) is provided with thread one (14) and thread two (15). Thread one (14) is located inside the insulating covering cylinder (2), and thread two (15) is located between recessed ring one (16) and recessed ring two (17). Recessed ring one (16) is located between thread one (14) and thread two (15). Thread one (14) and thread two (15) are both connected and engaged with the internal thread (13).

4. A K-type fuse according to claim 3, characterized in that, The inner wall of the insulating covering cylinder (2) is provided with a long thread (4), and the outer wall of the conductive cylinder (3) is provided with a short thread (12) corresponding to the position of the inner thread (13). The short thread (12) is connected to the long thread (4), and the outer wall of the conductive cylinder (3) is provided with a first marking ring (10) and a second marking ring (11).

5. A K-type fuse according to claim 2, characterized in that, The conductive cylinder (3) has a cavity (5) inside. One end of the fuse (1) is located in the cavity (5). A sliding seat (8) is slidably installed in the cavity (5). A spring (7) is snapped between the sliding seat (8) and the inner wall of the conductive cylinder (3). The spring (7) is in a compressed state. The sliding seat (8) is inserted into one end of the fuse (1).

6. A K-type fuse according to claim 5, characterized in that, The inner wall of the cavity (5) is fixedly connected to a protrusion one (6), and one end of the sliding seat (8) is fixedly connected to a protrusion two (9). The two ends of the spring (7) are respectively engaged with protrusion one (6) and protrusion two (9).

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