CN203192732U - Surface mounted tube fuse - Google Patents
Surface mounted tube fuse Download PDFInfo
- Publication number
- CN203192732U CN203192732U CN 201320049599 CN201320049599U CN203192732U CN 203192732 U CN203192732 U CN 203192732U CN 201320049599 CN201320049599 CN 201320049599 CN 201320049599 U CN201320049599 U CN 201320049599U CN 203192732 U CN203192732 U CN 203192732U
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- fuse
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Abstract
The utility model relates to a tube fuse, and especially relates to a surface mounted tube fuse with tiny volume. The tube fuse comprises a tube housing, a termination electrode, and a fuse, a soldering tin and metal sheets with holes. The fuse is disposed in a cavity of the tube housing. Two ends of the fuse extend out of the holes of the metal sheets. Inner surfaces of the metal sheets are combined with the tube housing through plating layers, and outer surfaces are combined with the fuse. The outer surfaces of the metal sheets are combined with an inner surface of the termination electrode through the soldering tin. The product is simple in structure, and compared with an existing product, withstand voltage is doubled, reaching requirements of working voltage of 250VAC and breaking capacity. The fuse would not be broken, explode, or splash, and would not cause unsafe phenomenon such as burning and damage of other components around, etc. The fuse is disposed on a central position of the product, and does not contact with a tube body, so resistance and fusing property are more consistent, structure is more stable, and the fuse is beneficial for volume production.
Description
Technical field
The utility model relates to a kind of tube fuse, particularly relates to the small surface-adhered type tube fuse of a kind of volume.
Background technology
Surface-adhered type fuse is a kind of protection class components and parts that are widely used on the electron product circuit plate, and the microminiature surface mounting fuse protector mainly contains two major types at present.One class is the solid state device type, and another kind of is unsettled lead-type.The structure of the fuse of solid state device type is that fuse is embedded in the backing material on every side, and the voltage that can bear is very low.
The fuse of unsettled lead-type is that a shell is arranged, and there is cavity the centre of shell, the unsettled placement of fuse in the cavity, and the two ends of fuse are fixed and the formation fuse in a different manner with the termination electrode.As the description in the US Patent No. 5214406, this fuse (as shown in Figure 1 and Figure 2) comprises that 2, two termination electrodes of shell of circle foreign side in are metal caps 1, and fuse 3 two ends are welded on the two ends metal cap 1 by scolding tin 4.Anatomize the structure of this type of unsettled lead-type surface mounting fuse protector, be not difficult to find that there is following shortcoming in it: most of unsettled lead-type fuse products structure more options waveforms are placed (as shown in Figure 1), or the stretching placement in diagonal angle (as shown in Figure 2), when entering shell, corrugated fuse can not select to place the orientation as required, usually fuse has at least an end to lean against on the shell, and during the assembling metal cap, be delivered on the fuse by scolding tin from the two ends applied pressure, fuse goes out to form bow action to the intermediate compression rear arch, arc top also can be pressed close to even abut against on the shell, the fuse that is to say this structure has at least one to two point can press close to shell, can not reach whole vacant states, can have influence on the consistency of fuse blows performance soon near the some heat transfer rate of shell, and in bigger voltage environment, when breaking current arrives, fuse generates heat in a large number, arcing even explosion produce impulsive force, easily shell is caused and burn, damage, and then cause damage or the pollution of other parts on the circuit board, divide the insulation resistance of having no progeny can not reach safe requirement.And the fuse-wires structure of the stretching placement in diagonal angle as shown in Figure 2, in order to keep fuse to pull directly, and with the termination between good the contact, must be with the bending two ends of fuse on two diagonal angles, and expose that shell is a bit of to be fixed, so when the two ends metal cap is installed, can produce friction between metal cap and fuse, these bendings and frictional force all may make fuse distortion or the fracture of tiny fragility, can have influence on the consistency of fuse blows performance equally, even reduce the fixing dynamics in fuse two ends to reduce friction, the fuse two ends remain with shell to be close to, the destruction of whole fuse when this has also caused disjunction test in the big voltage environment.
In traditional fuse and fuse technology, tube fuse promotes withstand voltage and avoids the method that shell damages in the disjunction test only to fill arc quenching materials such as quartz sand or liquid in pipe, but adding arc quenching material in the microminiature fuse is extremely difficult thing, when needing a large amount of consume materials and increasing worker, directly cause the increase of cost of goods manufactured, and can't reach production in enormous quantities.
The surface-adhered type tube fuse of the interior appearance of world wide at present; the limit of outward appearance maximum or diameter can be small to 5 ~ 8mm length; a plurality of patents are arranged; as US4920327; US5214406; US6147585; US7248141; the operating voltage of the fuse products of these patents all can only reach 125VAC or following; and the terminal electronic product needed that fuse uses is moved under 220VAC voltage environment at 110VAC; this just requires fuse can bear the above voltage of 220V; so just may when occurring, fault current in time make fusing; during the isolated fault; do not pollute again and damage other components and parts of circuit board upper periphery, thereby protect the operate as normal of whole electronic product.And above several patents product all can't satisfy market demand, does not reach the withstand voltage of 220V.Can bear the surface-adhered type tube fuse of the above voltage of 220VAC on the market, volume is 10mm or above length, does not meet the compact requirement of electronic product.The world security code requirement, the breaking capacity that subminiature fuse must reach 250VAC50A could be born the voltage of 250VAC in circuit, but be the microminiature surface-adhered type fuse of the stretching type structure of waveform or diagonal angle because of above-mentioned fuse, the risk of shell around fuse has, this structural factor cause the microminiature fuse can not pass through the disjunction test request of 250VAC50A in the safety standard.
Existing microminiature surface-adhered type fuse manufacturing technology is that fuse is directly packed in the tube-like envelope, two ends metal cap Nei Jiaxi, with tube-like envelope and metal cap heating assembling, fuse is welded on the metal cap, just finish product, the position of uncontrollable fuse in the tube-like envelope cavity has a big chunk probability fuse can press close to outer casing inner wall after assembling is finished.The fuse position does not influence the resistance measurement of whole fuse, therefore can't filter out the not fuse that hidden danger is arranged in the middle of cavity of fuse one by one by simple method fast, this have the fuse products of hidden danger when bearing the above voltage of 125V, fuse failure just might cause the tube-like envelope blast, can't be by the disjunction test of civil power 220V or above voltage.For guarantee fuse except two ends not with housing contacts, the present invention improves the structure of existing fuse, fuse is placed in the cavity neutral straight of tube-like envelope, the consistency that has so not only kept operating chacteristics, and disjunction when test fuse is in the fusing of cavity middle part or explosion, do not have influence on tube-like envelope, just can reach the requirement of disjunction test in the safety standard of 250VAC50A.This structure actual sets is dressed up product, and smoothly by every safety standard test of fuse, confirms that this Stability Analysis of Structures is reliable, can effectively solve the microminiature surface-adhered type fuse and hold problem that can't stand 220VAC or above voltage.
The utility model content
The voltage of general subminiature surface-adhered type cast fuse tolerance is not high, can't bear the above voltage of 220V, under the civil power condition, can't directly be connected in the circuit and use, the tube fuse that the purpose of this utility model is to provide a kind of simple in structure, little, stable performance of taking up room, shell can explosion splash when standing the breaking current of 250VAC50A in circuit.
The technical scheme that its technical problem that solves the utility model adopts is: the surface-adhered type tube fuse, comprise tube-like envelope, termination electrode, fuse and scolding tin, the tube-like envelope two ends also are provided with sheet metal with holes, and described fuse is arranged in the cavity of tube-like envelope, the fuse two ends pass from the hole of sheet metal, the inner surface of described sheet metal is combined by coating with tube-like envelope, and outer surface combines with fuse, and the sheet metal outer surface combines with the inner surface of termination electrode by scolding tin.
Described termination electrode is metal cap, and metal cap can be coated copper cap, and coating can be gold, silver, tin Ni-Pd alloy or palladium ashbury metal etc.
Above-mentioned fuse 3 neutral straight in the cavity of tube-like envelope 2 is placed.
Above-mentioned tube-like envelope 2 is earthenware, and any edge lengths or diameter are no more than 8mm, two ends metallize (silver slurry is stained with at two ends, behind the sintering nickel plating zinc-plated) to reach the effect with the sheet metal good combination.Described shell is the cuboid earthenware of circle foreign side in the cross section.
Above-mentioned sheet metal 5 can be coated copper sheet, coating can for tin or with tin can be in conjunction with good metal, middle hole diameter is set according to the fuse thickness, effect is the central authorities that fuse are fixed on tube-like envelope 2 cavitys, strength when guaranteeing the 1 assembling pressing of two ends metal cap can not make the fuse bending press close to shell, sheet metal 5 is fixing with metal cap 1 combination with fuse 3 by scolding tin 4, makes fuse 3 and metal cap 1 complete conducting.Because there is sheet metal 5 to support; fuse 3 can not contact with the inwall of shell 2; in 250V voltage environment; when unusual big electric current passes through; fuse produces high temperature; can in air, disconnect the purpose that reaches protective circuit fast; can not make the explosion of rising of shell 2 heat because fuse 3 heating; and sheet metal 5 can also play certain cushioning effect; the unlikely shell 2 that has influence on when fuse 3 arcings or explosion produce impulsive force; and the arcing spark of fuse 3 is isolated in the whole fuse, reach the protective circuit safe functioning.
This product structure is simple, on the basis of prior art (Fig. 1, Fig. 2), add a sheet metal 5 structure (Fig. 3, Fig. 4) as the support fuse between tube-like envelope 2 and two ends metal cap 1, make the utility model product promote one times than existing product withstand voltage, reach the requirement of operating voltage and the breaking capacity of 250VAC.Its materials and production equipment and prior art are close, can not increase considerably cost, but can reach the inaccessible withstand voltage of other products, under 250V or following voltage environment, do the disjunction test, fuse fragmentation can not occur, blast, splash, dangerous phenomenons such as the burning of other components and parts and destruction around causing.And fuse is placed in the product center position, does not contact pipe shaft, and resistance is more consistent with fusing performance, and structure is more stable, is conducive to the volume production operation.The performance of the every fuse of product empirical tests is all qualified.
Description of drawings
Fig. 1 is that existing fuse is corrugated microminiature surface mounting fuse protector product longitudinal sectional view.
Fig. 2 is that existing fuse is the stretching microminiature surface mounting fuse protector product longitudinal sectional view in diagonal angle.
Fig. 3 is the longitudinal sectional view of the utility model microminiature surface mounting fuse protector product.
Fig. 4 is the exploded perspective view before the assembling of the utility model microminiature surface mounting fuse protector.
Embodiment
Surface-adhered type tube fuse of the present utility model, its structure is shown in Fig. 3 and 4, comprise tube-like envelope 2, metal cap 1, fuse 3 and scolding tin 4, tube-like envelope 2 two ends also are provided with sheet metal with holes 5, described fuse 3 is arranged in the cavity of tube-like envelope 2, and fuse 3 two ends pass from the hole of sheet metal 5, and the inner surface of described sheet metal 5 and tube-like envelope 2 are combined by coating, outer surface combines with fuse 3, and sheet metal 5 outer surfaces combine by the inner surface of scolding tin 4 with metal cap 1.
During preparation, add a sheet metal 5 with holes 2 of two ends metal cap 1 and tube-like envelopes and fix fuse 3, sheet metal 5 is fixed on earlier on the tube-like envelope 2 of metallization termination before assembling fuse 3, when so in the end assembling end cap 1 with shell 2, the shape of the pith fuse 3 of fuse and performance just can not move or change because of assembling operation, guarantee that fuse 3 is in the centre of fuse, can not contact with shell 2, reached the purpose that improves withstand voltage.
In a concrete example, get the bent silk of the 125V infrastructure product that the same trade is of a size of 6.1*2.5*2.5mm, with the bent silk of the 250V that is of a size of 10.1*2.5*2.5mm infrastructure product, carry out the disjunction test with this patent product S6125-H2-2A each 1 ~ 2 batch (50 samples of each batch), comparing result is as shown in table 1:
Table 1: disjunction test result contrast
Claims (5)
1. surface-adhered type tube fuse, comprise tube-like envelope, termination electrode, fuse and scolding tin is characterized in that the tube-like envelope two ends also are provided with sheet metal with holes, and described fuse is arranged in the cavity of tube-like envelope, the fuse two ends pass from the hole of sheet metal, the inner surface of described sheet metal is combined by coating with tube-like envelope, and outer surface combines with fuse, and the sheet metal outer surface combines with the inner surface of termination electrode by scolding tin.
2. surface-adhered type tube fuse according to claim 1 is characterized in that described termination electrode is metal cap.
3. surface-adhered type tube fuse according to claim 1 is characterized in that described metal cap is provided with coating.
4. surface-adhered type tube fuse according to claim 1 is characterized in that the neutral straight placement in the cavity of tube-like envelope of described fuse.
5. surface-adhered type tube fuse according to claim 1 is characterized in that described tube-like envelope is no more than 8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320049599 CN203192732U (en) | 2013-01-30 | 2013-01-30 | Surface mounted tube fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320049599 CN203192732U (en) | 2013-01-30 | 2013-01-30 | Surface mounted tube fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203192732U true CN203192732U (en) | 2013-09-11 |
Family
ID=49109570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320049599 Expired - Lifetime CN203192732U (en) | 2013-01-30 | 2013-01-30 | Surface mounted tube fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203192732U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI574292B (en) * | 2015-08-21 | 2017-03-11 | Ching Ho Li | Surface adhesion type fuse and manufacturing method thereof |
| WO2024098788A1 (en) * | 2022-11-11 | 2024-05-16 | 南京萨特科技发展有限公司 | Chip fuse and preparation method therefor |
-
2013
- 2013-01-30 CN CN 201320049599 patent/CN203192732U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI574292B (en) * | 2015-08-21 | 2017-03-11 | Ching Ho Li | Surface adhesion type fuse and manufacturing method thereof |
| WO2024098788A1 (en) * | 2022-11-11 | 2024-05-16 | 南京萨特科技发展有限公司 | Chip fuse and preparation method therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130911 |