CN208271822U

CN208271822U - Fuse encapsulating structure

Info

Publication number: CN208271822U
Application number: CN201820323150.XU
Authority: CN
Inventors: 俞东
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-03-09
Filing date: 2018-03-09
Publication date: 2018-12-21
Anticipated expiration: 2028-03-09

Abstract

The utility model provides a kind of fuse encapsulating structure; including fuse element; fuse element includes metal plate and the insulating protective layer in at least side plate face of metal plate; and the metal plate for being equipped with insulating protective layer is successively wound as axis using itself edge and forms strip, the axial ends of the fuse element of strip is exposed metal plate.The utility model winds the fuse element to form fuse by using metal plate and insulation protection layer laminate; and the both ends of the fuse element in winding shaping are stayed and set metal plate with welding metal lead; it is simple structure, easy to make; the technique in tradition in the both ends welding metal cap of fuse element has been reduced or remitted again; it is integrally improved the processing efficiency of fuse; greatly reduce the cost of manufacture of fuse; and fuse encapsulating structure is compact; it is small in size; accurate, small volume equipment can be met, such as the functional requirement of intelligent digital product.

Description

Fuse encapsulating structure

Technical field

The utility model relates to fuse technical field more particularly to a kind of fuse encapsulating structures.

Background technique

Fuse is widely used in electronic product and motor product, to protect product from the broken of super-high-current It is bad.It is when electric current flows through the conductive fuel for having appropriate impedance, when electric current is more than specified electricity that fuse, which can protect the principle of product, When stream, fuse is blown because of overheat, and then is completely cut off electric current and entered product.Impedance after blowing is higher, then it is better to completely cut off effect.It is logical The sectional area of normal fuse is bigger, then impedance is lower, and rated current is higher.Fuse is connected with protected circuit, in specified electricity Flow in range in use, voltage drop and temperature rise it is fewer better.Fuse is heated via super-high-current, can be produced before complete fusing Raw electric arc is the high-energy of moment and part, and destructive power is very strong, be must be taken into consideration on fuse design and fabrication it is important because Element.

As shown in Figure 1, show a kind of existing fuse unit 10, the fuse unit 10 include fuse element 11, It is sheathed on the metal cap 13 that protection carrier 12 and envelope outside the fuse element 11 are set to the protection carrier 12 both ends, institute State metal cap 13 by solder 16 welding with the fuse element 11 it is electrically conductive connect.Wherein, the fuse element 11 is usual The insulated wire of conductor wire is coated with by conductor wire, conductive sheet or surface or insulating bar is constituted.

As it can be seen that the structure of existing fuse unit is more complex, bonding interface is more, and processing and fabricating is inconvenient, causes to add Work is with high costs；In addition, needing to keep certain intervals space between protection carrier and fuse element, to avoid fuse element and protect Shield carrier contacts and generating improper heat transfer causes fuse to fail, and therefore, existing fuse unit volume is larger, is not able to satisfy Accurate, small volume equipment, such as the demand of intelligent digital product.

Utility model content

Existed in the prior art or potential shortcoming in view of above-mentioned, the utility model provide a kind of structure it is simple, Fuse encapsulating structure easy to process, small in size, at low cost.

To achieve the above object, the technical scheme adopted by the utility model is that providing a kind of fuse encapsulating structure, Including fuse element, the fuse element includes metal plate and the insulation protection in at least side plate face of the metal plate Layer, and the metal plate for being equipped with the insulating protective layer is successively wound as axis using itself edge and forms strip, strip The axial ends of the fuse element is exposed the metal plate.

By adopting the above technical scheme, the utility model winds to form insurance by using metal plate and insulation protection layer laminate The fuse element of silk, and the both ends of the fuse element in winding shaping are stayed and set metal plate with welding metal lead, wherein it is wound into The mode of shape fuse element is compared to the packaged type for being arranged protection carrier in traditional insurance silk device, simple structure, production side Just, metal end is formed at the both ends of the fuse element of forming and carrys out welding metal lead, and reduced or remitted in tradition molten The technique of the both ends welding metal cap of silk element, is integrally improved the processing efficiency of fuse, greatly reduces the system of fuse Make cost.Meanwhile being spaced apart between metal plate by insulating protective layer, it can avoid metal plate contact, avoid between metal plate not The problems such as fuse fails caused by heat transfer, so that fuse structure is more compact, small volume can meet accurate, small Scale of construction equipment, such as the functional requirement of intelligent digital product.

In the embodiment of the utility model fuse encapsulating structure, the insulating protective layer is laminated in the plate of the metal plate On face.

In the embodiment of the utility model fuse encapsulating structure, the insulating protective layer is coated on the plate of the metal plate On face.

In the embodiment of the utility model fuse encapsulating structure, the insulating protective layer is arc-extinguishing medium layer.

In the embodiment of the utility model fuse encapsulating structure, the material of the arc-extinguishing medium layer is selected from sand, silica gel, three Poly cyanamid, magnesium hydroxide, glass or combinations thereof.

In the embodiment of the utility model fuse encapsulating structure, the side plate face of the metal plate is equipped with the insulation Protective layer.

In the embodiment of the utility model fuse encapsulating structure, the metal plate equipped with the insulating protective layer is with certainly One first side edge of body is axis, it is enabled to protect relative to the second side edge of the first side edge to the insulation is intended for The direction of sheath side is successively wound, and it is described for forming the metal plate and replacing winding and outermost one layer with the insulating protective layer The fuse element of metal plate.

In the embodiment of the utility model fuse encapsulating structure, the metal plate equipped with the insulating protective layer is with certainly One first side edge of body is axis, enables it support or oppose relative to the second side edge of the first side edge and the insulation is protected The direction of sheath side is successively wound, and it is described for forming the metal plate and replacing winding and outermost one layer with the insulating protective layer The fuse element of insulating protective layer.

Opposite third side in the embodiment of the utility model fuse encapsulating structure, in the metal plate before winding Edge and four side edge exceed the respective side edge of the insulating protective layer, and the third side edge and the described 4th Side edge is located at the both ends of the fuse element after winding.

In the embodiment of the utility model fuse encapsulating structure, the metal plate is made of the metal selected from silver or copper, Either the metal plate selected from silver/copper metal alloy that perhaps copper/tin is constituted by being made or the metal plate is by plating on copper It is silver-plated on tin or copper to be made.

Detailed description of the invention

It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings Obtain other attached drawings.

Fig. 1 is the schematic structural cross-sectional view of existing fuse unit.

Fig. 2 is the structural schematic diagram of the fuse encapsulating structure of the first embodiment of the utility model.

Fig. 3 is the side structure schematic diagram of the fuse encapsulating structure in Fig. 2 embodiment.

Fig. 4 is the structural schematic diagram of the manufacturing process of the fuse encapsulating structure in Fig. 2 embodiment.

Fig. 5 is the structural schematic diagram of the fuse encapsulating structure of second of embodiment of the utility model.

Fig. 6 is the side structure schematic diagram of the fuse encapsulating structure in Fig. 5 embodiment.

Fig. 7 is the structural schematic diagram of the manufacturing process of the fuse encapsulating structure in Fig. 5 embodiment.

Fig. 8 is the overlooking structure diagram of the manufacturing process of the fuse encapsulating structure in Fig. 5 embodiment.

Fig. 9 is the fuse encapsulating structure of the third embodiment of the utility model and its structural schematic diagram of manufacturing process.

Figure 10 is the 4th kind of fuse encapsulating structure of embodiment of the utility model and its structural schematic diagram of manufacturing process.

The corresponding relationship of appended drawing reference and component is as follows:

Fuse unit 10；Fuse element 11 (Fig. 1)；Protect carrier 12；Metal cap 13；Metal plate 14；Insulating protective layer 15。

Specific embodiment

Illustrate the embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this theory Content disclosed by bright book understands other advantages and effect of the utility model easily.The utility model can also be by addition Different specific embodiments are embodied or practiced, and the various details in this specification can also be based on different viewpoints and answer With carrying out various modifications or alterations under the spirit without departing from the utility model.

The technical scheme adopted by the utility model is that providing a kind of fuse encapsulating structure comprising fuse element, it should Fuse element includes metal plate and the insulating protective layer in at least side plate face of metal plate, and is equipped with the insulating protective layer Metal plate successively wound using itself edge as axis and form strip, the axial ends of the fuse element of the strip is exposed have on State metal plate.

The utility model is described in detail in the following with reference to the drawings and specific embodiments.

Embodiment 1:

Please see Fig. 2 to Fig. 4, the embodiments of the present invention 1 provide the small in size and processing and fabricating of one kind and easily protect Dangerous silk encapsulating structure.

As shown in Figures 2 and 3, which mainly includes a fuse element, which further wraps It includes a metal plate 14 and the insulating protective layer 15 in at least side plate face of the metal plate 14 only exists in the present embodiment Above-mentioned insulating protective layer 15 is provided in the side plate face of metal plate 14, the metal plate 14 equipped with the insulating protective layer 15 is with itself One side edge be that axis successively winds and forms strip, the axial ends of the fuse element of the strip is exposed above-mentioned metal plate 15, the exposed metal plate 15 in the both ends can be used for welding metal lead and (be equivalent to the metal at traditional insurance silk encapsulating structure both ends Cap).

Wherein, cooperate shown in Fig. 2~4, insulating protective layer 15 therein is independent a plates, the shape of metal plate 14 For rectangle, there are two opposite long sides and two opposite short sides, the shape of the insulating protective layer 15 of sheet is also cuboid, With two opposite long sides and two opposite short sides, also, in the present embodiment, the area of the insulating protective layer 15 is equal to metal The area of plate 14, certainly, the utility model are not limited to the concrete shape of metal plate and insulating protective layer, it can also be used in the two His any shape, such as circle, diamond shape, triangle, or it is other any irregular shapes.Insulating protective layer 15 is stacked at metal In the side plate face of plate 14, and the two is completely coincident.

When making the fuse element of the fuse, a metal plate 14 is provided first, the plate face of the metal plate 14 is horizontal It places；Then, an insulating protective layer 15 is provided, which is stacked in the top plate face of the metal plate 14, two Person's size is suitable, is completely coincident together；Then, by folded metal plate 14 equipped with insulating protective layer 15 with itself one first Side edge 141 (a rectangular short side) is axis, enables its 142 (rectangle of second side edge relative to first side edge 141 Another short side) to the direction of 15 side of insulating protective layer layer-by-layer winding in the counterclockwise direction upwards is intended for, can fit closely Upper one layer and wind, can also make that there are certain intervals between two layers；Metal plate 14 is ultimately formed to replace with insulating protective layer 15 Winding and outermost one layer of fuse element for metal plate 14.In this case, due to being located at outermost one layer of fuse element For metal plate 14, metal lead wire (being display in figure) can be directly welded at outermost one layer of the metal plate 14 at fuse element both ends Surface, sufficiently to avoid the contact between metal plate 14, mentioned at this point, insulating protective layer 15 can be completely coincident with metal plate 14 Insulation protection effect in high fuse between metal part.

Metal plate 14 therein can be made of the metal selected from silver or copper or the metal plate by selected from silver/copper or The metal alloy that copper/tin is constituted is made or the metal plate is made up of silver-plated on tin plating or copper on copper.

It should be noted that the heat for being converted to electric energy due to its own resistance makes melt generate heat when fuse is powered, The heat that electric current generates simultaneously, to ambient radiation, distributes heat by the modes such as convection current and conduction further through fuse element. When operating current of the fuse by permission, the heat of the heat and generation that distribute reaches balance, and heat will not accumulate in molten Body increases the temperature of melt, therefore fuse is not up to its fusing point and fuses.When the electric current that fuse passes through reaches When certain numerical value, by electric energy convert heat increase, radiating rate does not catch up with electrothermal calefactive rate, these heats will on melt by It gradually accumulates, increases melt temperature, when temperature reaches the fusing point of fuse, fuse starts to melt and continue to absorb heat further Fusing becomes liquid, and subsequent fuse temperature forms electric arc when further rising to evaporation point, and electric arc is that a kind of gas ionization is put The power of electrical phenomena, electric arc is related with the voltage of circuit, and voltage is higher, and electric arc is stronger, and the voltage rating main distinction of fuse exists The circuit voltage that can be born when blown fuse is different, and fuse cannot be used in the circuit higher than its voltage rating, because Electric arc is not easy to extinguish when circuit voltage is higher than Fuse Voltage Rating.In addition, the power of electric arc also has with the electric current in circuit It closes, the more big then electric arc of electric current is stronger.If cutting circuit cannot not be simply failed to, it is also possible to burn circuit in time by arc extinction In other components, so as to cause fire generation, cause the accident.

Therefore, the insulating protective layer 15 in the utility model embodiment uses arc-extinguishing medium layer, the material of the arc-extinguishing medium layer Material can be selected from sand, silica gel, melamine, magnesium hydroxide, glass or combinations thereof, and the form of the material of the arc-extinguishing medium layer is Granular, rodlike, hollow tubular, pencil or cylindrical shape.Arc-extinguishing medium layer has good insulation and thermally conductive performance, can play and disappear Except the purpose of electric arc, guarantee the safety in utilization of fuse element.

Embodiment 2:

Fig. 5 to Fig. 7 is please referred to, it is easily another that the embodiments of the present invention 2 provide small in size and processing and fabricating The way of realization of fuse encapsulating structure.

As shown in Figs. 5 to 7, which still includes being overlapped by a metal plate 14 and an insulating protective layer 15 Successively winding forms the fuse element of strip after together, also, the both ends of the fuse element of the strip after winding exposed have Above-mentioned metal plate 15, the exposed metal plate 15 in the both ends can be used for welding metal lead and (be equivalent to traditional insurance silk encapsulating structure The metal cap at both ends).In the present embodiment, above-mentioned insulating protective layer is still only provided in the side plate face of metal plate 14 15, insulating protective layer 15 and the shape of metal plate 14 use rectangle, and other shapes can also be used.Unlike the first embodiment, In the present embodiment, the area of insulating protective layer 15 is less than the area of metal plate 14, by taking the rectangular shape in embodiment as an example, Opposite first side edge 141 (a rectangular short side) and second side edge 142 in metal plate 14 is (rectangular another short Side) it aligns respectively with the corresponding short side of insulating protective layer 15, and the opposite third side edge 143 in metal plate 14 is (rectangular A side of shape) and four side edge 144 (rectangular another long side) exceed the length of the insulating protective layer 15 of respective side Side.

In winding, a metal plate 14 is provided first, the plate face of the metal plate 14 is horizontally arranged；Then, one is provided absolutely The insulating protective layer 15 is stacked in the top plate face of the metal plate 14 by edge protective layer 15, opposite in metal plate 14 Three side edges 143 and four side edge 144 exceed the respective side edge of insulating protective layer 15；Then, insulation is equipped with by folded The metal plate 14 of protective layer 15, for axis, enables it relative to the with the first side edge 141 (a rectangular short side) of itself The second side edge 142 (rectangular another short side) of one side edge 141 to the direction back on 15 side of insulating protective layer to Under layer-by-layer winding along clockwise direction, upper one layer can be fitted closely and wound, can also make that there are certain intervals between two layers；Most End form replaces winding and outermost one layer of fuse element for insulating protective layer 15, metal plate at metal plate 14 with insulating protective layer 15 The third side edge 143 and four side edge 144 of 14 corresponding edge beyond insulating protective layer 15 are located at winding shaping Strip fuse element both ends end, can using metal plate 14 should beyond part come direct welding metal lead.

Similarly, metal plate 14 therein can by selected from silver or copper metal be made or the metal plate by selected from silver/ The copper metal alloy that perhaps copper/tin is constituted is made or the metal plate is made up of silver-plated on tin plating or copper on copper.

Arc-extinguishing medium layer can be used in insulating protective layer 15 therein, and the material of the arc-extinguishing medium layer can be selected from sand, silica gel, three Poly cyanamid, magnesium hydroxide, glass or combinations thereof, and the form of the material of the arc-extinguishing medium layer is graininess, rodlike, hollow tube Shape, pencil or cylindrical shape.Arc-extinguishing medium layer has good insulation and thermally conductive performance, can play the purpose for eliminating electric arc, protects Demonstrate,prove the safety in utilization of fuse element.

Embodiment 3:

Referring to Fig. 9, the embodiments of the present invention 3 provide small in size and processing and fabricating easily another fuse The way of realization of encapsulating structure.

As shown in figure 9, the fuse encapsulating structure still includes being overlapped on by a metal plate 14 and an insulating protective layer 15 Successively winding forms the fuse element of strip after together, also, the fuse element of the strip after winding both ends it is exposed have on Metal plate 15 is stated, the exposed metal plate 15 in the both ends can be used for welding metal lead and (be equivalent to traditional insurance silk encapsulating structure two The metal cap at end).In the present embodiment, above-mentioned insulating protective layer 15 is still only provided in the side plate face of metal plate 14, Insulating protective layer 15 uses rectangle with the shape of metal plate 14 and area is identical, certain insulating protective layer 15 and metal plate 14 Other any shapes can also be used in shape.Unlike the first embodiment, in the present embodiment, insulating protective layer 14 itself is not Have and constitutes independent plate, but in the side plate face for being coated in metal plate 15 by the way of coating.

Its production method an are as follows: metal plate 14 is provided first, the plate face of the metal plate 14 is horizontally arranged；It then, will be exhausted The material of edge protective layer 15 is coated in the top plate face of the metal plate 14, and the two size is suitable, and edge is completely coincident Together；Then, by the metal plate 14 for being laid with insulating protective layer 15, with the first side edge of itself, (rectangular one is short Side) it is axis, enable it protect relative to the second side edge (rectangular another short side) of first side edge 141 to insulation is intended for The direction of 15 side of sheath is successively wound in the counterclockwise direction upwards, can be fitted closely upper one layer and be wound, can also make two layers Between there are certain intervals；Ultimately forming metal plate 14 to replace winding and outermost one layer with insulating protective layer 15 is metal plate 14 Fuse element.In this case, outermost one layer due to being located at fuse element is metal plate 14, can be by metal lead wire (figure In for display) be directly welded at fuse element both ends outermost one layer of metal plate 14 surface, at this point, insulating protective layer 15 can It is completely coincident with metal plate 14, sufficiently to avoid the contact between metal plate 14, improves exhausted between metal part in fuse Edge protecting effect.

Embodiment 4:

Referring to Fig. 10, the embodiments of the present invention 4 provide the convenient another insurance of small in size and processing and fabricating The way of realization of silk encapsulating structure.

As shown in Figure 10, which still includes being overlapped on by a metal plate 14 and an insulating protective layer 15 Successively winding forms the fuse element of strip after together, also, the fuse element of the strip after winding both ends it is exposed have on Metal plate 15 is stated, the exposed metal plate 15 in the both ends can be used for welding metal lead and (be equivalent to traditional insurance silk encapsulating structure two The metal cap at end).In the present embodiment, it is still only provided with by the way of coating in the side plate face of metal plate 14 above-mentioned The shape of insulating protective layer 15, insulating protective layer 15 and metal plate 14 uses rectangle, certain insulating protective layer 15 and metal plate Other any shapes can also be used in 14 shape, as different from Example 3, in the present embodiment, the face of insulating protective layer 15 Product is less than the area of metal plate 14, the opposite first side edge by taking the rectangular shape in embodiment as an example, in metal plate 14 141 (a rectangular short sides) and second side edge 142 (rectangular another short side) are corresponding with insulating protective layer 15 respectively Short side aligns, and the opposite third side edge (rectangular a side) and four side edge (rectangle in metal plate 14 Another long side) exceed respective side insulating protective layer 15 long side.

In winding, a metal plate 14 is provided first, the plate face of the metal plate 14 is horizontally arranged；Then, insulation is protected The middle part of top plate face of the material of sheath 15 coated on the metal plate 14, opposite third side edge in metal plate 14 and the Four side edge exceeds the respective side edge of insulating protective layer 15；Then, by folded metal plate equipped with insulating protective layer 15 14 with the first side edge 141 (a rectangular short side) of itself be axis, enable it relative to second side of first side edge 141 It is successively rolled up along clockwise direction downwards to the direction back on 15 side of insulating protective layer at edge 142 (rectangular another short side) Around can fit closely upper one layer and wind, can also make that there are certain intervals between two layers；Ultimately form metal plate 14 and insulation Alternately winding and outermost one layer of fuse element for insulating protective layer 15, metal plate 14 exceed insulating protective layer 15 to protective layer 15 Corresponding edge third side edge and four side edge be located at winding shaping strip fuse element both ends end, It can should exceed part using metal plate 14 come direct welding metal lead.

It should be noted that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to cooperate The bright revealed content of book is not intended to limit the utility model implementable so that those skilled in the art understands and reads Qualifications, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, In the case where not influencing the effect of the utility model can be generated and the purpose that can reach, should all still fall in disclosed in the utility model Technology contents obtain and can cover in the range of.Meanwhile in this specification it is cited as "upper", "lower", "left", "right", " in Between " and " one " etc. term, be merely convenient to being illustrated for narration, rather than to limit the enforceable range of the utility model, Relativeness is altered or modified, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the utility model.

The above is only the preferred embodiment of the utility model, not does in any form to the utility model Limitation, although the utility model has been disclosed with preferred embodiment as above, is not intended to limit the utility model, any to be familiar with Professional and technical personnel, in the range of not departing from technical solutions of the utility model, when in the technology using the disclosure above Hold the equivalent embodiment made a little change or be modified to equivalent variations, but all without departing from technical solutions of the utility model Hold, any simple modification, equivalent change and modification made by the above technical examples according to the technical essence of the present invention, still It is within the scope of the technical solutions of the present invention.

Claims

1. a kind of fuse encapsulating structure, it is characterised in that: including fuse element, the fuse element includes metal plate and is set to Insulating protective layer in at least side plate face of the metal plate, and the metal plate of the insulating protective layer is equipped with itself One edge successively winds for axis and forms strip, and the axial ends of the fuse element of strip is exposed the metal plate.

2. fuse encapsulating structure as described in claim 1, it is characterised in that: the insulating protective layer is laminated in the metal In the plate face of plate.

3. fuse encapsulating structure as described in claim 1, it is characterised in that: the insulating protective layer is coated on the metal In the plate face of plate.

4. fuse encapsulating structure according to any one of claims 1 to 3, it is characterised in that: the insulating protective layer is Arc-extinguishing medium layer.

5. fuse encapsulating structure as claimed in claim 4, it is characterised in that: the material of the arc-extinguishing medium layer be selected from it is husky, Silica gel, melamine, magnesium hydroxide or glass.

6. fuse encapsulating structure as described in claim 1, it is characterised in that: the side plate face of the metal plate is equipped with institute State insulating protective layer.

7. fuse encapsulating structure as claimed in claim 6, it is characterised in that: the metal equipped with the insulating protective layer Plate enables it described to being intended for relative to the second side edge of the first side edge using the first side edge of itself as axis The direction of insulating protective layer side is successively wound, formed the metal plate replace with the insulating protective layer winding and it is one layer outermost For the fuse element of the metal plate.

8. fuse encapsulating structure as claimed in claim 6, it is characterised in that: the metal equipped with the insulating protective layer Plate enables it support or oppose relative to the second side edge of the first side edge for described using the first side edge of itself as axis The direction of insulating protective layer side is successively wound, formed the metal plate replace with the insulating protective layer winding and it is one layer outermost For the fuse element of the insulating protective layer.

9. fuse encapsulating structure as claimed in claim 8, it is characterised in that: opposite in the metal plate before winding Third side edge and four side edge exceed the respective side edge of the insulating protective layer, and the third side edge and institute State the both ends for the fuse element that four side edge is located at after winding.

10. fuse encapsulating structure as described in claim 1, it is characterised in that: the metal plate is by the gold selected from silver or copper Category is made or the metal plate selected from silver/copper metal alloy that perhaps copper/tin is constituted by being made or the metal plate is logical Cross silver-plated on tin plating on copper or copper be made.