L-shaped special-shaped material belt, melt unit and melt

Abstract

The utility model relates to the field of circuit protection, in particular to an L-shaped special-shaped material strip, a melt unit and a melt, the L-shaped special-shaped material strip comprises a first section and a second section which are integrally connected, the thickness of the first section is larger than that of the second section, so that the longitudinal section of the special-shaped material strip is of an L-shaped structure, the first section is a copper strip, and the second section is a copper strip. The second section is a copper strip, a copper-silver composite strip or a copper-clad silver strip, and the first section and the second section are integrally connected through the copper strip. The wiring terminals of the melt units punched by the L-shaped special-shaped material belt and the melt part are integrally formed, and the at least two melt units are mutually and reversely inserted to form the melt, so that the problem that the melt material belt is not easy to process when the current is large is solved.

Description

Technical Field

[0001] The present invention relates to the field of circuit protection, specifically to the fuse element in a fuse for circuit protection, especially to the special-shaped strip for making the fuse element, the fuse element unit for making the fuse element, and the fuse element. Background Art

[0002] The fuse is connected in series in the circuit. When an overload or short-circuit current passes through the fuse element, the fuse element heats up and melts itself, thus playing a protective role. The fuse mainly consists of a housing, connection terminals, a fuse element, and an arc extinguishing medium, etc. The connection terminals are made of copper or other conductive materials, the fuse element part is a copper strip, a silver strip, or a copper-silver composite strip, and the fuse element and the connection terminals are conductively connected by welding (laser welding, resistance welding, soldering, etc.). This traditional form has a complex structure and a high cost. In the patent CN214411113U, the special-shaped strip structure is U-shaped. When making a strip with a large width, the process is complex and not easy to implement. Summary of the Invention

[0003] The purpose of the present invention is to provide an L-shaped special-shaped strip, a fuse element unit, and a fuse element. The special-shaped strip is made into an L-shaped special-shaped strip, and the fuse element units formed by punching the special-shaped strip are inserted into each other in opposite directions to form a fuse element containing multiple fuse element units, reducing the processing complexity and making the processing more convenient.

[0004] To achieve the above purpose, the technical solution provided by the present invention is an L-shaped special-shaped strip. The special-shaped strip includes a first section and a second section connected integrally. The thickness of the first section is thicker than that of the second section, so that the longitudinal section of the special-shaped strip presents an L-shaped structure. The first section is a copper strip, the second section is a copper strip, a copper-silver composite strip, or a copper-clad silver strip, and the connection part between the first section and the second section is a copper strip.

[0005] Preferably, the thickness of the first section is 0.5 ≤ t1 ≤ 3, and the thickness of the second section is 0.1 ≤ t2 ≤ 0.36 mm.

[0006] Preferably, when the second section is a copper-silver composite strip or a copper-clad silver strip, one end of the second section away from the first section is a free end, the free end of the second section is a copper strip, and the length of the free end of the second section is greater than the length of the first section.

[0007] Preferably, the copper-silver composite strip is formed by alternating copper strips and silver strips, and the silver strip penetrates the length and thickness of the copper strip.

[0008] Preferably, the copper-clad silver strip is composed of a copper substrate and a silver strip, and silver strips are respectively arranged at intervals on both sides of the copper substrate, and the silver strip penetrates the length of the copper strip.

[0009] Preferably, the thickness of the silver strip of the copper-clad silver strip is 0.015 - 0.02 mm.

[0010] The present invention also provides a melt unit, which is punched from the L-shaped special-shaped strip. The melt unit is integrally in an L-shaped structure and includes a first terminal, a melt part, and a second terminal that are integrally formed. The first terminal is punched from the first section, and the melt part and the second terminal are punched from the second section; the first terminal and the melt part are in an L-shaped structure, and a plurality of narrow neck parts are arranged on the melt part, and positioning grooves and mounting holes are respectively formed on the first terminal and the second terminal.

[0011] The present invention also provides a melt, which is formed by reversely inserting at least two or more melt units; wherein, the first terminal of each melt unit is folded in half, and the melt part is bent into a wavy shape; the connecting ends at both ends of the melt are respectively formed by reversely inserting the first terminal and the second terminal of each melt unit, and the outermost parts of the connecting ends of the melt are wrapped by the first terminal of one of the melt units.

[0012] For the melt made by reversely inserting the melt units, the thicknesses of the terminals at both ends are consistent.

[0013] The manufacturing process of the L-shaped special-shaped strip of the present invention is simple; the melt unit with an integral connection is formed by punching the L-shaped special-shaped strip, and then according to the design requirements, different numbers of melt units are reversely inserted to form a melt, which solves the problem that the melt strip is not easy to process under high current, and avoids the welding process between the terminal and the melt part, reducing the contact resistance. Description of the Drawings

[0014] Figure 1 It is a schematic side view structure diagram of the L-shaped special-shaped strip.

[0015] Figure 2 It is a schematic front view structure diagram of the L-shaped special-shaped strip.

[0016] Figure 3 It is a schematic cross-sectional view structure diagram when the second section is a copper-silver composite strip.

[0017] Figure 4 It is a schematic cross-sectional view structure diagram when the second section is a copper-clad silver strip.

[0018] Figure 5 It is a schematic structure diagram of the melt punched from the L-shaped special-shaped strip.

[0019] Figure 6 It is Figure 5 The schematic diagram of the bent state of the melt structure.

[0020] Figure 7 It is a schematic structural diagram of a structure in which two bent melt structures are inserted in reverse.

[0021] Figure 8 It is a schematic structural diagram of the melt structure of a finished product made of two melt structures.

[0022] Reference numerals:

[0023] The first section L1, the second section L2, copper strip 12, silver strip 13, copper base material 14, silver strip 15, first terminal part 16, melt part 17, second terminal part 18, positioning groove 19, mounting hole 20, narrow neck part 21, melt 22, melt body 23, terminal 24. Specific embodiments

[0024] The L-shaped special-shaped strip of the present invention, the special-shaped strip includes an integrally connected first section and a second section, the thickness of the first section is thicker than the thickness of the second section, so that the longitudinal section of the special-shaped strip is an L-shaped structure, the first section is a copper strip, the second section is a copper strip, a copper-silver composite strip or a copper-clad silver strip, and the connection part between the first section and the second section is a copper strip.

[0025] The following are preferred embodiments and specific descriptions are made in conjunction with the drawings. The orientation words involved are only based on the orientation shown in the drawings and do not constitute a limitation on the technical solution of the present invention.

[0026] The L-shaped special-shaped strip, the material is a conductive material, see Figure 1 , along the length direction of the special-shaped strip, it includes an integrally formed first section L1 and a second section L2, the thickness t1 of the first section L1 is greater than the thickness t2 of the second section L2; the thickness t1 of the first section L1 is 0.5 mm ≤ t1 ≤ 3 mm, and the thickness t2 of the second section L2 is 0.1 mm ≤ t2 ≤ 0.36 mm.

[0027] The first section L1 is a copper strip, that is, the material of the first section L1 is copper material. The second section L2 is a copper strip, a copper-silver composite strip or a copper-clad silver strip, see Figure 2 , it is a schematic plan view of the second section L2 being a copper-silver composite strip or a copper-clad silver strip; one end of the second section L2 connected to the first section L1 is a copper strip, and the end far from the first section L1 (the end not connected to the first section L1) is a free end, and the free end of the second section L2 is also a copper strip structure, and the length of the copper strip at the end far from the first section L1 is greater than the length of the first section L1. The free ends of the first section and the second section of the L-shaped special-shaped strip are both copper strips to ensure that the materials at both ends of the made melt are the same.

[0028] The structure of the second section L2 is a copper-silver composite strip, see Figure 3 , the copper-silver composite strip is an integrated structure in which copper strips 12 and silver strips 13 are alternately arranged, and the silver strips 13 penetrate through the length and thickness of the copper strips 12.

[0029] The second section L2 is a copper-clad silver strip structure. Refer to Figure 4 , the copper-clad silver strip is an integrated structure with silver strips 15 alternately coated on both sides of a copper substrate 14, and the silver strips 15 run through the length of the copper substrate 14. The thickness of the silver strip 15 with silver coating is 0.015 mm to 0.02 mm.

[0030] Adopt Figures 1 to 4 The melt unit punched from an L-shaped special-shaped strip, Figure 5 is the planar structure of the punched melt unit. The melt unit as a whole is in an L-shaped structure, including a first terminal 16, a melt part 17, and a second terminal 18 that are integrally connected. The melt part 17 is located between the first terminal 16 and the second terminal 18, and the width of the first terminal 16 is more than twice the width of the second terminal 18. The first terminal 16 is punched from the first section of the L-shaped special-shaped strip, the melt part 17 and the second terminal 18 are punched from the second section of the L-shaped special-shaped strip, and the second terminal 18 is punched from the free end of the second section of the L-shaped special-shaped strip. When punching the melt part 17, multiple parallel melt bodies can be punched according to needs, and each melt body is integrally connected to the first terminal and the second terminal. As Figure 5 shown, the melt part 17 includes two parallel melt bodies.

[0031] Positioning grooves 19 and mounting holes 20 are respectively provided on the first terminal 16 and the second terminal 18, and the mounting holes 20 are circular or oblong. A necking part 21 is provided on the melt part 17 between the first terminal 16 and the second terminal 18, and its narrow diameter can be formed by punching holes in various structural forms such as circular, oblong, and diamond-shaped.

[0032] Refer to Figure 6 , when making the melt, first fold the first terminal 16 of the punched melt unit as Figure 5 shown in a direction perpendicular to the melt part, and bend the melt part between the first terminal and the second terminal to form a wavy structure.

[0033] Refer to Figure 7 , the melt is formed by reverse plugging of at least two or more melt units as Figure 6 shown. As Figure 7 shown, two melt units are reversely plugged: insert the second terminal 18 of one melt unit into the bent first terminal 16 of another melt unit, and make the first terminal 16 wrap and fix the second terminal 18 of the other melt unit located therein. The fixing method is fixed by welding or other means to form as Figure 8The melt 22 of the processed finished product shown. The melt 22 includes four parallel melt bodies 23 provided with necks and terminal blocks 24 located at both ends of the four melt bodies 23. The terminal blocks 24 are integrally connected to the melt bodies 23.

Claims

1. An L-shaped special-shaped strip, characterized in that: The special-shaped material strip includes a first section and a second section connected as one piece, the first section is thicker than the second section, so that the longitudinal section of the special-shaped material strip is an L-shaped structure, the first section is a copper strip, the second section is a copper strip, a copper-silver composite strip or a copper-coated silver strip, and the connection between the first section and the second section is a copper strip.

2. The L-shaped profiled strip according to claim 1, characterized in that: The thickness of the first section is 0.5≤t1≤3 mm, and the thickness of the second section is 0.1≤t2≤0.36 mm.

3. The L-shaped profiled strip according to claim 1, characterized in that: When the second section is a copper-silver composite strip or a copper-coated silver strip, the end of the second section away from the first section is a free end, the free end of the second section is a copper strip, and the length of the free end of the second section is greater than the length of the first section.

4. The L-shaped special-shaped material strip according to claim 3, characterized in that: The copper-silver composite belt is composed of copper belts and silver belts arranged alternately, and the silver belt runs through the length and thickness of the copper belt.

5. The L-shaped special-shaped material strip according to claim 3, characterized in that: The copper-coated silver belt is composed of a copper substrate and a silver belt. The silver belts are arranged at intervals on both sides of the copper substrate, and the silver belts run through the length of the copper belt.

6. The L-shaped profiled strip according to claim 5, characterized in that: The thickness of the silver strip of the copper-coated silver strip is 0.015-0.02 mm.

7. A melt unit, characterized in that: The melt unit is punched out by the L-shaped special-shaped strip according to any one of claims 1 to 6, and the melt unit is in an L-shaped structure as a whole, including an integrally formed first terminal, a melt part and a second terminal, the first terminal is punched out of the first section, and the melt part and the second terminal are punched out of the second section; the first terminal and the melt part are in an L-shaped structure, a narrow neck part is provided on the melt part, and a positioning groove and a mounting hole are respectively provided on the first terminal and the second terminal.

8. A melt, characterized in that The melt unit is formed by at least two pieces of the melt unit according to claim 7 being plugged in reverse to each other; wherein the first terminal of each piece of the melt unit is folded in half, and the melt part is bent in a wavy shape; the connecting ends at both ends of the melt are respectively formed by the first terminal and the second terminal of each piece of the melt unit being plugged in reverse, and the outermost parts of the connecting ends of the melt are each wrapped by the first terminal of one of the melt units.

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