Special-shaped material belt, melt unit and melt

Abstract

The utility model relates to the field of circuit protection, in particular to a special-shaped material belt, a melt unit and a melt, the special-shaped material belt comprises two wiring terminal parts which are arranged at an interval, each wiring terminal part comprises an aluminum base material and a copper belt, the copper belts are attached to the two wiring terminal parts and a single face or double faces of a hollow area between the two wiring terminal parts, and the aluminum base materials are arranged on the aluminum base materials. The connecting terminal parts are made to form an aluminum-coated copper structure, the copper strip in a hollow area between the two connecting terminal parts forms a melt part, when the two sides of the connecting terminal parts are coated with copper, the melt part is composed of two spaced and parallel copper strips, and when the single side of the connecting terminal parts is coated with copper, the melt part is composed of two spaced and parallel copper strips. The melt part is composed of a copper strip. The fuse body made of the special-shaped material belt and the wiring terminal are integrally formed, and copper is coated on an aluminum base material, so that the use amount of copper materials is reduced, and the production cost is reduced.

Description

Technical Field

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

[0002] The fuse is connected in series in the circuit. When the 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. The fuse element and the connection terminals are electrically conducted through welding (such as laser welding, resistance welding, soldering, etc.). This traditional form has a complex structure and a high cost. However, with the skyrocketing price of copper and the scarcity of copper resources, replacing some copper materials is an urgent technical problem to be solved. Summary of the Invention

[0003] The purpose of the present invention is to provide a special-shaped strip, a fuse element unit, and a fuse element. The special-shaped strip adopts a special-shaped copper-aluminum composite strip. The connection terminal part is copper-coated aluminum substrate, and the fuse element part is a copper strip, or a copper-silver composite strip or a copper-coated silver strip is arranged on the copper strip, which can ensure the performance of the made fuse element while reducing the usage amount of copper materials and the cost.

[0004] To achieve the above purpose, the technical solution provided by the present invention is a special-shaped strip, which includes two connection terminal parts arranged at intervals. The connection terminal part includes an aluminum substrate and a copper strip. The copper strip is attached to one side or both sides of the two connection terminal parts and the hollow area between the two connection terminal parts, so that the connection terminal part forms a copper-coated aluminum structure, and the copper strip in the hollow area between the two connection terminal parts forms the fuse element part; when the connection terminal part is copper-coated on both sides, the fuse element part is composed of two parallel copper strips arranged at intervals, and when the connection terminal part is copper-coated on one side, the fuse element part is composed of one copper strip.

[0005] Preferably, a copper-silver composite strip structure or a copper-coated silver strip structure is arranged on the copper strip of the fuse element part.

[0006] Preferably, the copper-silver composite strip is provided with several silver strips arranged at intervals in the copper strip. The silver strips penetrate through the length and thickness of the copper strip, and the fuse element part and the connection terminal part are integrally connected through the copper strip.

[0007] Preferably, the copper-coated silver strip is provided with silver strips arranged at intervals on one side or both sides of the copper strip. The silver strips penetrate through the length of the copper strip, and the fuse element part and the connection terminal part are integrally connected through the copper strip.

[0008] Preferably, the thickness of the silver strip of the copper-clad silver strip is 0.015 - 0.02 mm.

[0009] Preferably, the thickness of the terminal part is 3 mm - 6 mm, and the thickness of the copper strip is 0.1 mm - 0.36 mm; when the aluminum substrate of the terminal part is covered with the copper strip on one side, the thickness of the terminal part is 3 mm.

[0010] The present invention also provides a melt unit, which is formed by punching the special-shaped strip. The melt unit includes a terminal formed by punching the terminal part, a melt body formed by punching the melt part. A plurality of narrow neck parts are arranged on the melt body. Positioning grooves are opened on both sides of the terminal, and mounting holes are opened on the terminal; when both sides of the terminal part of the special-shaped strip are copper-clad, two parallel melt bodies are integrally formed between the terminals at both ends of the melt unit; when the terminal part of the special-shaped strip is copper-clad on one side, one melt body is integrally formed between the two terminals of the melt unit.

[0011] The present invention also provides a melt, which is composed of at least one melt unit. When there are two or more melt units, the melt units are oppositely and closely attached to form the melt.

[0012] Preferably, when there are two or more melt units and the melt body of the melt unit is one, the terminals of the melt units are oppositely and closely attached, and the melt bodies of the melt units are bent in opposite directions to form the melt. Both sides of the terminal of the melt are copper strips.

[0013] For the special-shaped strip of the present invention, the terminal is set as an aluminum substrate. By covering the surface of the aluminum substrate with a copper strip, the amount of copper used is reduced while ensuring the performance of the melt, and the production cost of the melt is reduced.

[0014] At the same time, by using the covered copper strip as the melt part, the terminal part and the melt part are integrated, saving the processing of the melt part, which is directly completed by the terminal copper-cladding process at one time, simplifying the processing process of the special-shaped strip and the manufacturing process of the melt structure.

[0015] By integrally connecting the copper-silver composite strip, copper-clad silver strip on the copper strip of the melt part with the terminal, the electrical conductivity of the melt structure is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a special-shaped strip with double-sided copper cladding and a hollow melt part.

[0017] Figure 2 isFigure 1 Schematic diagram of cross-sectional structure.

[0018] Figure 3 is Figure 2 Partial enlarged view I of

[0019] Figure 4 Schematic diagram of the structure of a special-shaped strip with single-sided copper cladding.

[0020] Figure 5 is Figure 4 Partial enlarged view I of

[0021] Figure 6 Schematic diagram of the structure where the surface of the terminal is copper-clad and the melt part uses a copper-silver composite strip or a copper-clad silver strip.

[0022] Figure 7 Schematic diagram of the structure where the terminal is double-sided copper-clad and the melt part uses a copper-silver composite strip.

[0023] Figure 8 Schematic diagram of the structure where the terminal is double-sided copper-clad and the melt part uses a copper-clad silver strip.

[0024] Figure 9 Schematic diagram of the melt structure formed by punching a special-shaped strip.

[0025] Figure 10 is made by using Figure 9 The melt structure of the finished product made by the melt structure formed by punching, and the terminal is double-sided copper-clad.

[0026] Figure 11 is made by using Figure 9 The melt structure of the finished product made by the melt structure formed by punching, and the terminal is single-sided copper-clad.

[0027] Reference signs:

[0028] Terminal part 1, melt part 2, melt unit 3, melt 4, melt body 5, terminal 6, copper strip 11, silver strip 13, silver strip 15, narrow diameter part 16, positioning groove 17, mounting hole 18. Detailed implementation manners

[0029] The special-shaped strip of the present invention includes two terminal parts arranged at intervals. The terminal part includes an aluminum substrate and a copper strip. The copper strip is attached to one side or both sides of the two terminal parts and the hollow area between the two terminal parts, so that the terminal part forms an aluminum-clad copper structure, and the copper strip in the hollow area between the two terminal parts forms the melt part. When the terminal part is double-sided copper-clad, the melt part is composed of two parallel copper strips arranged at intervals. When the terminal part is single-sided copper-clad, the melt part is composed of one copper strip.

[0030] The melt structure punched from the special-shaped strip includes an integrally formed terminal and a melt. A number of narrow neck parts are provided on the melt. Positioning grooves are opened on both sides of the terminal, and mounting holes are opened on the terminal.

[0031] The following are preferred embodiments and specific descriptions will be given in conjunction with the drawings. The orientation terms 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.

[0032] The special-shaped strip, see Figure 1 , includes two terminal parts 1 arranged at intervals, and the interval distance between the two terminal parts 1 is the length of the melt part 2. When the special-shaped strip is used to make the melt, the terminal part 1 is made into a terminal, and the melt part 2 is made into a melt.

[0033] The base material of the terminal part 1 is an aluminum base material. Along the length of the special-shaped strip, copper plating is carried out on one or both sides of the terminal part 1 and the melt part 2 to form a copper strip 11. The aluminum base material of the terminal part 1 and the copper strip 11 are an integral structure, and the copper strip of the terminal part 1 and the copper strip at the melt part 2 are an integral structure, so that the whole special-shaped strip is an integral structure. The structure of the special-shaped strip after copper plating: the terminal part 1 is copper-plated on one or both sides of the aluminum base material, and the position of the melt part 2 is composed of a single-layer copper strip or two parallel and spaced double-layer copper strips. See Figure 2 and Figure 3 , when the melt part 2 is a double-layer copper strip, the space between the two layers of copper strips of the melt part 2 between the two terminal parts is a hollow structure; see Figure 4 and Figure 5 , when the melt part 2 is a single-layer copper strip, a groove structure is formed in the melt part 2 between the two terminal parts.

[0034] See Figures 1 to 5 , the composite thickness t of the terminal part 1 is 3 mm to 6 mm. The thickness of the terminal part 1 refers to the thickness after copper plating on the aluminum base material. When copper plating is carried out on one side, the thickness of the terminal part 1 is not greater than 3 mm; the thickness of the copper strip for copper plating (that is, the thickness of the melt part) t1 is 0.1 mm to 0.36 mm. The thickness of the melt part 2 only refers to the thickness of the copper strip plated on one side, because when copper strips are plated on both sides of the terminal part, two parallel and spaced copper strips are formed in the melt part.

[0035] When using Figures 1 to 5 of the special-shaped strip to process into a melt structure, the terminal part 1 is made into a terminal, and the melt part 2 is made into a melt body, so that the terminal and the melt body are an integrally formed structure.

[0036] The above Figures 1 to 5Among them, a copper strip is directly used as the melt part 2. In other embodiments, the melt part 2 adopts a copper-silver composite strip structure formed by arranging silver strips at intervals on the copper strip, or a copper-coated silver strip structure formed by arranging silver layers at intervals on both sides of the copper strip. See Figure 6 The special-shaped strip includes a terminal part 1 and a melt part 2. Figure 6 Among them, the terminal part 1 adopts an aluminum substrate copper-clad structure with copper clad on one or both sides of the aluminum substrate; the melt part 2 adopts a copper-silver composite strip structure or a copper-coated silver strip structure arranged on the copper strip.

[0037] When the melt part 2 is a copper-silver composite strip structure, the copper-silver composite strip structure is formed by alternately arranging several silver strips 13 at intervals on the copper strip 11. The silver strip 13 penetrates through the thickness and length of the copper strip 11. See the cross-sectional structure diagram Figure 7 , and both ends of the connection between the melt part 2 and the terminal part 1 are copper strips 11.

[0038] When the melt part 2 is a copper-coated silver strip, silver strips 15 are arranged at intervals on one or both sides of the copper strip 11 of the melt part 2 to form a copper-coated silver strip, and the thickness of the silver strip 15 is 0.015 - 0.02 mm. See the cross-sectional structure diagram Figure 8 , and the silver strip 15 penetrates through the length of the copper strip 11. Both ends of the connection between the melt part 2 and the terminal part 1 are copper strips 11.

[0039] Figures 1 to 8 It can be seen that regardless of whether the melt part 2 of the special-shaped strip uses a copper strip, or a copper-silver composite strip structure or a copper-coated silver strip structure arranged on the copper strip, both ends of its connection with the terminal part 1 are copper strips.

[0040] When processing the melt structure from the special-shaped strip, first punch out the Figure 9 melt unit 3. Punch the terminal part of the special-shaped strip to form a terminal, and punch the melt part to form a melt body. A narrow neck part 16 is stamped on the melt body. The narrow diameter part 16 can be in various structural forms such as circular, oblong, and rhombic. Positioning grooves 17 and external mounting holes 18 are provided at both ends of the terminal. The mounting holes are circular or oblong.

[0041] Manufacture the melt structure from the punched melt unit 3:

[0042] When the terminal part 1 is copper-clad on both sides, see Figure 10 , there are two melt bodies of the melt unit 3. One melt can be made from one melt unit 3. Only need to bend the two melt bodies of one melt unit 3 in opposite directions to form the finished melt 4. The melt 4 includes two parallel melt bodies 5 and a terminal 6 integrally connected to the melt body 5.

[0043] When the single-sided copper cladding is applied to the terminal part 1, the melt body of the melt unit 3 is one piece. Refer to Figure 11 . First, bend the melt body of the melt unit 3 to one side, and then place two melt units 3 against each other, that is, the terminals at both ends of the two melt units 3 are respectively fitted and fixed, so that the copper-clad side is located outside the terminal, and the two melt bodies are bent in opposite directions to form the melt 4. The melt 4 includes two parallel melt bodies 5 and terminals 6 integrally connected to the melt bodies 5.

Claims

1. A special-shaped strip, characterized in that: The invention comprises two spaced-apart terminal parts, wherein the terminal parts comprise an aluminum substrate and a copper strip, wherein the copper strip is attached to one or both sides of the two terminal parts and a hollow area between the two terminal parts, so that the terminal parts form an aluminum-copper-clad structure, and the copper strip in the hollow area between the two terminal parts forms a melt part; When the terminal portion is copper-clad on both sides, the melt portion is composed of two spaced-apart parallel copper strips; when the terminal portion is copper-clad on one side, the melt portion is composed of one copper strip.

2. The special-shaped strip according to claim 1, characterized in that: The copper belt of the melt part is provided with a copper-silver composite belt structure or a copper-clad silver belt structure.

3. The special-shaped strip according to claim 2, characterized in that: The copper-silver composite belt is a copper belt in which a plurality of silver belts are arranged at intervals. The silver belts run through the length and thickness of the copper belt. The melt part and the terminal part are integrally connected through the copper belt.

4. The special-shaped strip according to claim 2, characterized in that: The copper-clad silver belt is a copper belt with silver belts arranged at intervals on one side or both sides thereof, the silver belts run through the length of the copper belt, and the melt part and the terminal part are integrally connected through the copper belt.

5. The special-shaped strip according to claim 4, characterized in that: The thickness of the silver strip of the copper-coated silver strip is 0.015-0.02 mm.

6. The special-shaped strip according to claim 1, characterized in that: The thickness of the terminal part is 3 mm to 6 mm, and the thickness of the copper strip is 0.1 mm to 0.36 mm; when the aluminum substrate of the terminal part is covered with the copper strip on one side, the thickness of the terminal part is 3 mm.

7. A melt unit, characterized in that: A melt unit is formed by punching out the special-shaped material strip as described in any one of claims 1 to 6, the melt unit includes a terminal formed by punching out the terminal portion, a melt body formed by punching out the melt portion, a plurality of narrow neck portions are arranged on the melt body, positioning grooves are provided on both sides of the terminal, and a mounting hole is provided on the terminal; when the terminal portion of the special-shaped material strip is copper-clad on both sides, two parallel melt bodies are integrally formed between the terminal portions at both ends of the melt unit; when the terminal portion of the special-shaped material strip is copper-clad on one side, a melt body is integrally formed between the two terminal portions of the melt unit.

8. A melt, characterized in that The melt unit is composed of at least one melt unit according to claim 7. When there are two or more melt units, the melt units are bonded together to form the melt.

9. The melt according to claim 8, characterized in that When there are more than two melt units and there is only one melt body of the melt unit, the connection terminals of the melt unit are arranged opposite to each other, and the melt body of the melt unit is bent in opposite directions to form the melt, and both sides of the connection terminals of the melt are copper strips.

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