Fuse with melt in star-shaped arrangement structure

Abstract

The utility model relates to the technical field of circuit protection, in particular to a fuse with melt in a star-shaped arrangement structure, which comprises a shell, a fuse element, a fuse element and a fuse element, the fuse assembly is arranged in the shell and fixedly connected with the contact knife connecting plates at the two ends of the shell, the fuse assembly comprises a plurality of groups of bent fuses, and the plurality of groups of bent fuses are arranged in the shell in a single-circle star shape; and the terminals are arranged at the two ends of the shell. According to the fuse with the melt star-shaped arrangement structure, the melts are uniformly distributed in a single circle, so that each melt is ensured to be uniformly heated in the shell, the performance of a product is enhanced, and the service life of the product is prolonged. According to the fuse with the melt star-shaped arrangement structure, the single melt is bent, the plurality of melts are arranged in a star shape, and under the bending structure and the arrangement mode, the loading capacity of the melts in a fusion tube with a specified tube number can be further improved, so that the amperage of the fuse is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit protection, in particular to a fuse with a star-shaped arrangement structure of the fuse. Background Art

[0002] A fuse is a device that, when the current exceeds the specified value for a sufficiently long time, breaks the current by melting one or several specially designed proportional fuses, thereby disconnecting the circuit to which it is connected. Fuse has a significant current limiting effect and rapid action capability, which is unmatched by other electrical appliances. Therefore, it is widely used in high and low voltage power distribution systems and control systems, electrical equipment, and new energy vehicles. As a short circuit and overcurrent protector, it is one of the most commonly used protection devices.

[0003] However, the melt distribution of ordinary fuses is nothing more than the following two types. Arrangement 1: Four pieces of melt are arranged in parallel in the shell. The temperature distribution of the two middle pieces of melt is much greater than that of the outer melt. The melt arranged inside and outside the shell will therefore have uneven heat-sensitive temperatures, which will directly affect the performance and life of the product. Arrangement 2: A diamond-shaped distribution is adopted. The melt of this structure is evenly distributed in the melt tube, and the temperature field is evenly distributed. However, now, especially automotive customers have increasingly compact space requirements, and it is necessary to further increase the melt loading capacity of the melt tube with a specified tube number, thereby increasing the ampere number of the fuse. However, the blank space between the four edges of the overall diamond-shaped melt and the shell is too large and not compact enough. If multiple pieces of melt are required, the volume of the shell will also need to be increased. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and provide a fuse with a star-shaped arrangement structure of the fuse, comprising:

[0005] The housing comprises an outer shell and contact blade connecting plates arranged at two ends of the outer shell;

[0006] A melt assembly is disposed in the housing and fixedly connected to the contact blade connecting plates at both ends of the housing, wherein the melt assembly includes a plurality of groups of bent melts, and the plurality of groups of bent melts are arranged in a single-circle star pattern in the housing;

[0007] Terminals are arranged at two ends of the shell.

[0008] Furthermore, two ends of the melt assembly are welded to the contact blade connecting plate.

[0009] Furthermore, a plurality of rows of through holes are arranged at the center line of the single-piece melt, the through holes in each row are arranged at intervals, and a narrow neck is formed between two adjacent through holes in each row.

[0010] Furthermore, the folding line of the single piece of the melt is perpendicular to the connecting line of the single row of through holes.

[0011] Furthermore, a metallurgical effect layer is provided at the narrow neck of the melt adjacent to the inner wall of the shell.

[0012] Furthermore, the metallurgical effect layer is a tin-plated layer provided at the narrow neck of the melt.

[0013] Furthermore, the shell is filled with arc extinguishing medium.

[0014] Further, the folding angle of the single piece of the melt is arranged toward the center position of the shell; or the folding angle of the single piece of the melt is arranged in the direction opposite to the center of the shell.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The fuse of the utility model has a star-shaped arrangement structure in which the fuse is evenly distributed in a single circle, ensuring that each piece of the fuse is evenly heated in the shell, thereby enhancing the performance of the product and extending the life of the product.

[0017] 2. The utility model discloses a fuse with a star-shaped arrangement structure in which the single-piece fuse is bent, and a plurality of fuses are arranged in a star shape. With this bent structure and arrangement, the loading capacity of the fuse in the fuse tube of a specified tube number can be further increased to increase the ampere number of the fuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a schematic structural diagram of a fuse with a star-shaped arrangement structure of the fuse element according to the utility model without the shell;

[0020] Figure 2 A schematic diagram of a single fuse of a fuse with a star-shaped arrangement structure of the fuse according to the utility model;

[0021] Figure 3 This is a schematic cross-sectional view of a fuse with a star-shaped melt arrangement structure according to the utility model, wherein (a) is a schematic view of the melt corner away from the center of the circle; and (b) is a schematic view of the melt corner toward the center of the circle.

[0022] Reference numerals

[0023] 1: Shell;

[0024] 11: housing; 12: contact knife connecting plate;

[0025] 2: melt component;

[0026] 21: melt; 22: through hole; 23: narrow neck;

[0027] 3: Terminal. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.

[0029] Example 1

[0030] See also Figure 1-3 The technical solution of a fuse with a star-shaped arrangement structure of the fuse provided in this embodiment includes the following:

[0031] The housing 1 comprises a shell 11 and a contact blade connecting plate 12 provided at two ends of the shell 11;

[0032] The melt assembly 2 is arranged in the housing 11 and fixedly connected to the contact blade connecting plates 12 at both ends of the housing 11. The melt assembly 2 includes a plurality of groups of bent melts 21, and the plurality of groups of bent melts 21 are arranged in a single-circle star pattern in the housing 11;

[0033] The terminals 3 are arranged at two ends of the housing 1 .

[0034] Specifically, two ends of the melt assembly 2 are welded to the contact blade connecting plate 12 .

[0035] In specific implementation, a suitable welding method such as resistance welding, laser welding, TIG welding, etc. can be selected according to specific material and process requirements. The two ends of the melt 21 can also be bent and the bent parts can be welded more firmly.

[0036] Preferably, the material of the melt 21 can be selected according to actual needs, such as metal materials with good electrical conductivity, such as aluminum, copper, silver, etc.; alloy materials with low melting points, such as lead-tin alloy, etc. can also be selected.

[0037] Specifically, a plurality of rows of through holes 22 are arranged at the center line of the single melt 21 , and the through holes 22 in each row are arranged at intervals, and a narrow neck 23 is formed between two adjacent through holes 22 in a single row.

[0038] In a specific implementation, the number of rows of through holes 22 can be set as required, and the density of each row of through holes 22 can also be set as required. Therefore, the through holes 22 are simplified in the accompanying drawings. This structure is common knowledge to those skilled in the art, so it will not be repeated here.

[0039] Specifically, the folding line of the single piece of the melt 21 is perpendicular to the connecting line of the single row of through holes 22 .

[0040] In a specific implementation, a row of through holes 22 can be spaced apart at the center line of a whole piece of melt 21, and each row of through holes 22 is spaced apart to form a narrow neck 23 between two adjacent through holes 22. After the narrow neck 23 is punched, the melt 21 is cut into a length required by the actual requirement, and after cutting, the melt 21 is placed in a special molding mold to be bent into a shape such as Figure 2 shown.

[0041] Preferably, taking the style in the attached drawings as an example, the melt 21 is provided with four pieces. In order to make the space compact, the inner angle of each piece of the melt 21 is set to about 135° as much as possible to form a star shape, or a regular octagon, that is, the inner angle of the melt 21 ranges from 130° to 140°.

[0042] In a specific implementation, if more melts 21 are required, the bending angle and the width of the melts 21 can be adjusted according to the required number of melts 21 to evenly form a multi-angle star shape.

[0043] Specifically, a metallurgical effect layer is provided at the narrow neck 23 of the melt 21 adjacent to the inner wall of the shell 1 .

[0044] Specifically, the metallurgical effect layer is a tin-plated layer provided at the narrow neck 23 of the melt 21 .

[0045] Specifically, the housing 1 is filled with arc extinguishing medium.

[0046] Preferably, the arc extinguishing medium in the fuse is an important component for quickly extinguishing the arc generated when the fuse melts. The arc is a high-temperature and high-conductivity gas discharge phenomenon generated between the contacts due to a sudden change in current when the circuit is disconnected. This arc not only damages the contacts, but may also prolong the circuit disconnection time and even cause other safety problems. Therefore, the selection of an appropriate arc extinguishing medium is crucial to the performance of the fuse. Arc extinguishing media such as high-pressure oil, inert gas, quartz sand, etc. can be selected as needed to fill the housing 1.

[0047] Specifically, the folding angle of the single-piece melt 21 is arranged toward the center position of the shell 1 ; or the folding angle of the single-piece melt 21 is arranged in a direction opposite to the center of the shell 1 .

[0048] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fuse with a star-shaped arrangement structure of the melt, characterized in that: include: The housing comprises an outer shell and contact blade connecting plates arranged at two ends of the outer shell; A melt assembly is disposed in the housing and fixedly connected to the contact blade connecting plates at both ends of the housing, wherein the melt assembly includes a plurality of groups of bent melts, and the plurality of groups of bent melts are arranged in a single-circle star pattern in the housing; Terminals are arranged at two ends of the shell.

2. The fuse with a star-shaped arrangement structure of the melt according to claim 1, characterized in that: The two ends of the melt assembly are welded to the contact knife connecting plate.

3. The fuse with a star-shaped arrangement structure of the melt according to claim 1, characterized in that: A plurality of rows of through holes are arranged at the center line of the single-piece melt, the through holes in each row are arranged at intervals, and a narrow neck is formed between two adjacent through holes in each row.

4. The fuse with a star-shaped arrangement structure of the melt according to claim 3, characterized in that: The folding line of the single-piece melt is perpendicular to the connecting line of the single-row through holes.

5. The fuse with a star-shaped arrangement structure of the melt according to claim 4, characterized in that: A metallurgical effect layer is provided at the narrow neck of the melt adjacent to the inner wall of the shell.

6. The fuse with a star-shaped arrangement structure of the melt according to claim 5, characterized in that: The metallurgical effect layer is a tin-plating layer provided at the narrow neck of the melt.

7. The fuse with a star-shaped arrangement structure of the melt according to claim 1, characterized in that: The shell is filled with arc extinguishing medium.

8. The fuse with a star-shaped arrangement structure of the melt according to claim 1, characterized in that: The folding angle of the single-piece melt is arranged toward the center of the shell; or the folding angle of the single-piece melt is arranged in the direction opposite to the center of the shell.

Images