CN219917054U - Fuse element for fuse and fuse with same - Google Patents
Fuse element for fuse and fuse with same Download PDFInfo
- Publication number
- CN219917054U CN219917054U CN202320472324.XU CN202320472324U CN219917054U CN 219917054 U CN219917054 U CN 219917054U CN 202320472324 U CN202320472324 U CN 202320472324U CN 219917054 U CN219917054 U CN 219917054U
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- variable cross
- fuse
- section
- melt
- holes
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- 239000000155 melt Substances 0.000 claims abstract description 33
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 210000003734 kidney Anatomy 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 description 5
- 230000004927 fusion Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- -1 or the like Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Fuses (AREA)
Abstract
The utility model relates to a fuse element for a fuse and a fuse having the same. The melt comprises: a conductive base made of copper and having a rectangular sheet shape; at least three rows of variable cross-sectional portions arranged at intervals along a length direction of the conductive base, each row of variable cross-sectional portions including at least three punched holes arranged at intervals along a width direction, a portion between adjacent punched holes of each row of variable cross-sectional portions forming a throat; wherein the shape of the diameter of the centrally disposed variable cross-section portion is different from the diameter of the variable cross-section portions on both sides of the centrally disposed variable cross-section portion, and the minimum cross-sectional area of the diameter of the centrally disposed variable cross-section portion is equal to the diameter of the variable cross-section portions on both sides of the centrally disposed variable cross-section portion and the total cross-sectional area is smaller than the diameter of the variable cross-section portions on both sides of the centrally disposed variable cross-section portion.
Description
Technical Field
The utility model relates to the technical field of electronic components, in particular to a fuse element for a fuse and the fuse with the same.
Background
The fuse, especially the fast fuse, is widely used as a short-circuit current protector for various power distribution systems and control system electric equipment, especially for semiconductor rectifying elements or rectifying devices by virtue of the advantage that the fast fuse can be rapidly disconnected. The fast fuse can be connected in series with the protected circuit, and when short-circuit current passes through the melt, the melt is fused by the heat generated by the melt, so that the circuit is disconnected, and the purpose of protecting the circuit is achieved. However, prior art flash fuses are typically made of silver and the throat portion of their melt is typically arranged in the same manner, i.e., typically designed to be the same shape and size, to break large fault currents. Obviously, the existing quick fuse has the defects of higher cost and narrower application range.
There is therefore a need in the art for lower cost and wider applicability melts and fuses.
Disclosure of Invention
The present utility model aims to provide a melt for a fuse that solves at least some of the problems described above.
The present utility model is also directed to a fuse employing the improved melt as described above.
According to one aspect of the utility model, there is provided a melt comprising: a conductive base made of copper and having a rectangular sheet shape; at least three rows of variable cross-sectional portions arranged at intervals along a length direction of the conductive base, each row of variable cross-sectional portions including at least three punched holes arranged at intervals along a width direction, a portion between adjacent punched holes of each row of variable cross-sectional portions forming a throat; wherein the shape of the diameter of the centrally disposed variable cross-section portion is different from the diameter of the variable cross-section portions on both sides of the centrally disposed variable cross-section portion, and the minimum cross-sectional area of the diameter of the centrally disposed variable cross-section portion is equal to the diameter of the variable cross-section portions on both sides of the centrally disposed variable cross-section portion and the total cross-sectional area is smaller than the diameter of the variable cross-section portions on both sides of the centrally disposed variable cross-section portion.
Compared with the prior art, the melt in the utility model has the advantages that the minimum sectional area of the narrow diameters of the variable cross-section parts arranged in the middle is set to be equal to the narrow diameters of the variable cross-section parts at the two sides, and the total sectional area is smaller than the variable cross-section parts at the left side and the right side, so that the heat collection performance of the variable cross-section parts arranged in the middle is better than that of the variable cross-section parts at the left side and the right side, the fusing time of the variable cross-section parts of each row is consistent when large fault current is broken, and the variable cross-section parts arranged in the middle are fused at first when the fault current is low-power overload. Further, the heat transfer distance between the centrally arranged variable cross section parts and the two ends of the conductive matrix is longer than that between the centrally arranged variable cross section parts and the two sides of the conductive matrix, so that the melt can meet the requirement of low-power overload on the basis of manufacturing the conductive matrix by using low-cost copper, and the application range is wider.
Preferably, the arrangement of at least three punched holes on the variable cross-section portions on both sides of the centrally arranged variable cross-section portion is the same.
Preferably, the variable cross-section portion located on both sides of the centrally arranged variable cross-section portion includes two first side holes extending from both ends in the width direction of the conductive base body to the other end side, respectively, and two first intermediate holes located between the two first side holes, centers of the two first side holes and the first intermediate holes being located on the same straight line.
Preferably, the centrally arranged variable cross-section portion includes two second side holes extending from both ends in the width direction of the conductive base toward the other end side, respectively, and two second intermediate holes located between the second side holes, centers of the two second side holes and the second intermediate holes being on the same line, a shape of the second side holes being different from the first side holes, and a shape of the second intermediate holes being different from the first intermediate holes.
Preferably, the second side hole has a dimension equal to the first side hole in both the length direction and the width direction, and the second middle hole has a dimension equal to the first middle hole in both the length direction and the width direction.
Preferably, the first side hole is a half kidney-shaped hole, the first middle hole is a kidney-shaped hole, the second side hole is a half rectangular hole, and the second middle hole is a rectangular hole.
Preferably, the melt is symmetrically arranged in both the length direction and the width direction.
Preferably, the melt may further include a tin bridge disposed on the conductive base body adjacent to the variable cross-section portion in a width direction thereof.
According to another aspect of the present utility model, there is also provided a fuse comprising the melt as described above.
Additional features and advantages of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following, or may be learned from the practice of the utility model.
Drawings
Embodiments of the present utility model are described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a cross-sectional view of a melt and a fuse applied thereto in accordance with the present utility model;
fig. 2 is a schematic view of a melt according to the present utility model.
Reference numerals illustrate:
10-fuses; 11-melt; 111-a conductive matrix; 112-a variable cross-section portion; 113-diameter; 114-a first side aperture; 115-a first intermediate hole; 116-a second side aperture; 117-a second intermediate hole; 118-tin bridge; 12-melting tube; 13-end cap.
Detailed Description
Referring now to the drawings, illustrative versions of the disclosed melt and fuse having the same are described in detail. Although the drawings are provided to present some embodiments of the utility model, the drawings are not necessarily to scale and certain features may be exaggerated, removed, or partially sectioned to better illustrate and explain the present disclosure. The position of part of components in the drawings can be adjusted according to actual requirements on the premise of not affecting the technical effect. The appearances of the phrase "in the drawings" or similar language in the specification do not necessarily refer to all figures or examples.
Certain directional terms used hereinafter to describe the drawings, such as "inner", "outer", "above", "below" and other directional terms, will be understood to have their normal meaning and refer to those directions as they would be when viewing the drawings. Unless otherwise indicated, directional terms described herein are generally in accordance with conventional directions as understood by those skilled in the art.
The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.
The terms "joined," "connected," and the like as used herein, include both two components being indirectly joined together by means of an intermediate layer such as an adhesive, a solder, or the like, or an intermediate member such as a connecting member, a transition member, or the like, and also two components being directly joined together without any intermediate layer such as an adhesive, a solder, or the like, or an intermediate member such as a connecting member, a transition member, or the like.
Fig. 1 to 2 show by way of example a fuse 10 according to the utility model and a melt 11 in the fuse 10, the melt 11 in this example and the fuse 10 being inexpensive to manufacture and applicable to the protection requirements of different loads under a plurality of operating conditions. As shown, the fuse 10 may include a melt 11, a melt tube 12, and two end caps 13.
In particular, the fusion tube 12 may be configured as a cylinder with open ends, the melt 11 may be received in an interior cavity of the fusion tube 12, and two end caps 13 may be mounted to the ends of the fusion tube 12, respectively, such as in an interference fit, to close the fusion tube 12. Both ends of the melt 11 may be welded to the adjacent end caps 13, respectively, for example, by spot welding or soldering, and the inside of the melt tube 12 may be filled with an arc extinguishing medium such as quartz sand (not shown).
Wherein melt 11 may include a conductive matrix 111 and at least three rows of varying cross-section portions 112. The conductive substrate 111 can be manufactured by punching a copper material through a punching die, so that the cost can be effectively reduced and the severe environment compounding and current impact application conditions can be satisfied compared with the prior art of the fast fuse 10 made of silver. The conductive base 111 may have a rectangular sheet shape, and at least three rows of variable cross-section portions 112 may be arranged at intervals, preferably at uniform intervals, along its length direction. The length direction of the conductive base 111 shown in fig. 1 and 2 is the lateral direction of the page where the drawing is located, and the width direction is the longitudinal direction of the page where the drawing is located.
The variable cross-section portion 112 may include at least three punched holes arranged at intervals in the width direction of the conductive base 111. The portions between adjacent punched holes of each row of variable cross-section portions 112 form slits 113, and the distances between adjacent slits 113 on the same variable cross-section portion 112 are equal and the shapes are the same. The centrally disposed variable cross-section 112 is farther from both ends of the conductive base 111 than the two side variable cross-section 112, i.e., farther from both end caps 13 of the fuse 10, which may cause the heat transfer distance of the centrally disposed variable cross-section 112 to the both end caps 13 of the fuse 10 to be much longer than the two side variable cross-section 112, which may cause the centrally disposed variable cross-section 112 to rise in temperature above the two side variable cross-section 112 when subjected to an electric current exceeding a prescribed value. Thus, when the melt 11 of the present utility model is made of copper having a higher melting point than silver, not only a large fault current, i.e., a short-circuit current, but also a small fault current of low power overload, such as 1.1ln, 2ln, 3ln, and 5ln, can be cut off by the melt 11 arranged in the above-described manner.
According to the present utility model, the shape of the narrow diameter 113 of the centrally disposed variable cross-section portion 112 is different from the narrow diameter 113 of the variable cross-section portion 112 located on both sides of the variable cross-section portion 112, which may be designed in such a manner that the minimum sectional area of the narrow diameter 113 of the centrally disposed variable cross-section portion 112 is equal to the minimum sectional area of the narrow diameter 113 of the variable cross-section portion 112 on both sides, which may allow each row of variable cross-section portions 112 to ensure that the arcing time and the burning time coincide with the variable cross-section portions 112 on both sides when breaking a large fault current. Further, the total cross-sectional area of the narrow diameter 113 of the centrally disposed variable cross-section portion 112 is smaller than the total area of the narrow diameter 113 of the variable cross-section portions 112 on both sides, which can improve the heat collecting performance of the centrally disposed variable cross-section portion 112 so that the centrally disposed variable cross-section portion 112 fuses earlier than the variable cross-section portions 112 on both sides when it is overloaded by a low power.
Alternatively, at least three rows of variable cross-section portions 112 may be symmetrically arranged in the length direction and the width direction of the conductive base 111, and the variable cross-section portions 112 located on both sides of the centrally arranged variable cross-section portions 112 may be identical in construction, i.e., at least three punched holes may be arranged in the same manner and at the same distance from the end of the adjacent conductive base 111, which facilitates processing of the melt 11 of the present utility model, and may make the arcing time and the burning time of each row of variable cross-section portions 112 uniform under breaking.
As shown in fig. 1 and 2, the number of the variable cross-section portions 112 is three, and four punched holes are formed in each of the variable cross-section portions 112, so that three slits 113 are formed in each of the variable cross-section portions 112. It is understood that the number of variable cross-section portions 112 may be more than three in a singular row.
The variable cross-section portions 112 located at both left and right sides of the middle-row variable cross-section portion 112 may include two first side holes 114 formed to extend from both ends in the width direction of the conductive base 111 to the other end side, respectively, and two first intermediate holes 115 located between the two first side holes 114, and centers of the two first side holes 114 and the first intermediate holes 115 may be located on the same line. Thus, the first side aperture 114 may be a half kidney aperture open at one end for ease of machining. The first middle hole 115 may be a kidney-shaped hole, and the first middle hole 115 may be twice as large as the first side hole 114, which may further facilitate the processing of the stamping die.
Similarly, the middle-row variable cross-section portion 112 may include two second side holes 116 formed to extend from both ends in the width direction of the conductive base 111 toward the other end side, respectively, and two second intermediate holes 117 located between the two second side holes 116, and centers of the two second side holes 116 and the second intermediate holes 117 may be located on the same straight line. Thus, the second side hole 116 may be a semi-rectangular hole with one end open, and the second middle hole 117 may be a rectangular hole.
The dimensions of the middle-row variable cross-section portion 112 in both the longitudinal direction and the width direction are the same as those of the variable cross-section portions 112 on the left and right sides, wherein the dimension of the middle-row variable cross-section portion 112 in the longitudinal direction can be regarded as the width and the dimension in the width direction can be regarded as the length thereof, and the dimension of the variable cross-section portions 112 on the left and right sides in the length direction is the largest dimension thereof in the direction and the dimension thereof in the width direction is the largest dimension thereof in the direction. Considering that the shape of the second side hole 116 of the middle-row variable cross-section portion 112 is different from the shape of the first side hole 114 of the left and right variable cross-section portions 112, the shape of the narrow diameter 113 of the middle-row variable cross-section portion 112 is substantially rectangular and the narrow diameter 113 of the left and right variable cross-section portions 112 is substantially hyperbolic, and the minimum cross-sectional area of the narrow diameter 113 of the middle-row variable cross-section portion 112 is equal to the left and right variable cross-section portions 112 but the total cross-sectional area is smaller than the left and right variable cross-section portions 112. Note that the width direction referred to here and hereinafter refers to the width direction of the conductive base 111.
Optionally, the melt 11 may further include a tin bridge 118 welded to the conductive base 111, and the tin bridge 118 may be disposed on the conductive base 111 adjacent to each variable cross-section 112 in the width direction of the conductive base 111, for example, on the right side of the left-row variable cross-section 112, the left and right sides of the middle-row variable cross-section 112, and the left side of the right-row variable cross-section 112, thereby generating a metallurgical effect to accelerate the melting of the melt 11 at low-power overload and to protect the circuit.
It should be understood that although the present disclosure has been described in terms of various embodiments, not every embodiment is provided with a separate technical solution, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the various embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.
The foregoing is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model. Any equivalent alterations, modifications and combinations thereof will be effected by those skilled in the art without departing from the spirit and principles of this utility model, and it is intended to be within the scope of the utility model.
Claims (9)
1. Melt (11) for a fuse (10), characterized in that the melt (11) comprises:
a conductive base (111) made of copper and having a rectangular sheet shape;
at least three rows of variable cross-section portions (112) arranged at intervals in the longitudinal direction of the conductive base body (111), each row of variable cross-section portions (112) including at least three punched holes arranged at intervals in the width direction, a portion between adjacent punched holes of each row of variable cross-section portions (112) forming a slit (113);
wherein the shape of the narrow diameter (113) of the centrally arranged variable cross-section portion (112) is different from the narrow diameter (113) of the variable cross-section portion (112) located on both sides of the centrally arranged variable cross-section portion (112), and the minimum cross-sectional area of the narrow diameter (113) of the centrally arranged variable cross-section portion (112) is equal to the narrow diameter (113) of the variable cross-section portion (112) located on both sides of the centrally arranged variable cross-section portion (112) and the total cross-sectional area is smaller than the narrow diameter (113) of the variable cross-section portion (112) located on both sides of the centrally arranged variable cross-section portion (112).
2. Melt (11) for a fuse (10) according to claim 1, characterized in that at least three punched holes on the variable cross-section sections (112) on both sides of the centrally arranged variable cross-section (112) are arranged in the same way.
3. Melt (11) for a fuse (10) according to claim 1, characterized in that the variable cross-section portion (112) located on both sides of the centrally arranged variable cross-section portion (112) includes two first side holes (114) extending from both ends in the width direction of the conductive base body (111) to the other end side, respectively, and two first intermediate holes (115) located between the two first side holes (114), centers of the two first side holes (114) and the first intermediate holes (115) being on the same straight line.
4. A melt (11) for a fuse (10) according to claim 3, characterized in that the centrally arranged variable cross-section portion (112) includes two second side holes (116) extending from both end sides in the width direction of the conductive base body (111) toward the other end side, respectively, and two second intermediate holes (117) located between the second side holes (116), centers of the two second side holes (116) and the second intermediate holes (117) being on the same straight line, the second side holes (116) being different in shape from the first side holes (114), the second intermediate holes (117) being different in shape from the first intermediate holes (115).
5. The melt (11) for a fuse (10) of claim 4, wherein said second side aperture (116) is equal to said first side aperture (114) in both a length direction and a width direction, and said second intermediate aperture (117) is equal to said first intermediate aperture (115) in both a length direction and a width direction.
6. The melt (11) for a fuse (10) of claim 5, wherein said first side aperture (114) is a half kidney aperture, said first intermediate aperture (115) is a kidney aperture, said second side aperture (116) is a half rectangular aperture, and said second intermediate aperture (117) is a rectangular aperture.
7. Melt (11) for a fuse (10) according to any of the preceding claims 1 to 6, characterized in that the melt (11) is arranged symmetrically in both the length direction and the width direction.
8. Melt (11) for a fuse (10) in accordance with claim 1, characterized in that the melt (11) may further comprise a tin bridge (118) arranged on the conductive base body (111) adjacent to the variable cross-section portion (112) in its width direction.
9. A fuse (10), characterized in that the fuse (10) comprises a melt (11) according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320472324.XU CN219917054U (en) | 2023-03-13 | 2023-03-13 | Fuse element for fuse and fuse with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320472324.XU CN219917054U (en) | 2023-03-13 | 2023-03-13 | Fuse element for fuse and fuse with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219917054U true CN219917054U (en) | 2023-10-27 |
Family
ID=88463475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320472324.XU Active CN219917054U (en) | 2023-03-13 | 2023-03-13 | Fuse element for fuse and fuse with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219917054U (en) |
-
2023
- 2023-03-13 CN CN202320472324.XU patent/CN219917054U/en active Active
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