CN201766044U - Plug-in wire type fuse - Google Patents

Abstract

The utility model relates to a plug-in wire type fuse, which comprises a support frame, a fuse wire and a covering sealing layer, wherein the support frame is made of conductive materials, at least two end parts of the support frame are in plane structures, the planes form connecting electrodes, the fuse wire is glued or welded on surface electrodes of the support frame, the fuse wire, a bonding point or a welding point and the partial support frame are wrapped in the covering sealing layer, and a part of the support frame is outwards exposed out of the covering sealing layer for forming a connecting lead pin. The utility model has the advantages that the performance consistency of the plug-in wire type fuse is greatly improved, the production cost of the plug-in wire type fuse is effectively reduced, the quality of products is ensured, the reliability of the products is improved, and the process is simple and practical.

Description

A kind of plug-in type silky fuse

Technical field

The utility model belongs to Electronic Protection class components and parts field, is specifically related to a kind of plug-in type silky fuse.

Background technology

The plug-in type fuse is used widely in printed circuit board (PCB), and along with the microminaturization of electronic device, its size is also more and more littler.It is a kind of being installed in the circuit, guarantees the electric elements of circuit safety operation.When circuit breaks down or is unusual, be accompanied by electric current and constantly raise, and the electric current that raises might damage some important devices or valuable device in the circuit, also might burn circuit even cause fire.Fuse protection electronic equipment is not subjected to the injury of overcurrent, can avoid electronic equipment because of the caused grievous injury of internal fault yet.

Being widely used in the method for making fuse at present has two kinds, and a kind of is the printing electroplating technology, and another kind is to wear silk in cavity.But the printing electroplating technology provides a kind of method of mass production fuse, by the design to conducting layer figure, can produce the fuse of different electric currents, its structure such as Fig. 1, and the two ends of substrate 3 are provided with face electrode 1, and melt 2 is printed between the face electrode 1.But there is fatal defective in this technology, and promptly Yin Shua circuit is after the sintering drying, and its compactness is difficult to assurance, thereby causes the performance discreteness of product very big, electroplates the environmental issue of being brought in addition and also receives publicity day by day.The fuse device performance of wearing the silk manufacturing in cavity is more stable, but its production efficiency is low, causes product cost always than higher, and is difficult to produce small-sized or subminiature fuse.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of features simple structure is provided, is easy to process, the plug-in type fuse of long service life, function admirable.

The purpose of this utility model is achieved through the following technical solutions:

A kind of plug-in type silky fuse comprises support, fuse, encapsulated layer; It is characterized in that, described support is an electric conducting material, it has two surfaces at least is planar structure, this plane constitutes electrode, described fuse bonds or is welded on the electrode, fuse is wrapped in the encapsulated layer together with bonding point or pad and part support, and the part of support exposes outside encapsulated layer, constitutes to connect pin.

Said enclosure layer is a kind of foamable polymer in the above-mentioned fuse, and has less conductive coefficient, for example the Foamex of conductive coefficient about 0.03w/k.m.Adopt the main cause of the little material of conductive coefficient to be: fuse is to belong to a kind of electronic device that heat is worked that relies on, when the electric current that passes through fuse in the circuit raises, its inner fuse has so just avoided equipment that big fault takes place because of the heating turn-off current.The little effect that just can play heat build-up of encapsulated layer conductive coefficient, if the encapsulated layer conductive coefficient is too big, the heat of fuse can be transmitted to encapsulated layer very soon, the heat that fuse does not reach fusing just can not move, and finally can cause equipment that bigger fault takes place.Adopt the main cause of expanded material to be fragment and energy when the hole of expanded material can provide certain space to be carried on fuse failure.

The preparation of plug-in type silky fuse of the present utility model is: on the electrode at conducting bracket two ends fuse is being bondd respectively or be welded on the face electrode of support, and then integral body seals, fuse and its fixing point are encapsulated in the encapsulated layer.

Above-mentioned said support is arranged with array way as junior unit, as forming a plurality of junior units on the support, all is same as other junior units on each junior unit.Fuse couples together by the method and the electrode of bonding or welding, realize being electrically connected of fuse two ends, fuse realize and the support junior unit between after being electrically connected of circuit, on support, form the array integral body of a fuse, fuse is after forming array integral body on the support, seal again, cut off, just formed single fuse.

The plug-in type silky fuse that the utility model provides is a kind of fuse based on conducting bracket, and compares with the fuse of conventional method manufacturing at present, and its outstanding substantive distinguishing features and obvious improvement is mainly reflected in the following aspects:

1: simple in structure, easily manufactured.This fuse parts are few, integrated degree height, and product is small-sized, and production cost is low, and process equipment is simple, and is easy to operate, no any chemicals in the course of processing, compliance with environmental protection requirements.

2: compare with present fuse, the fuse function admirable of fuse-wires structure, the structure of fuse is dense, has guaranteed consistency of product and reliability, thereby has improved the yield of product, because the lifting of yield, cost also has certain reduction.

3: this processes process stabilizing is reliable, produces rapidly, owing to adopt the support of array, can save the time of a large amount of more conversion materials in the production, and its production efficiency gets a promotion.

4: flexible configuration, because fuse is bonding or is welded on the support, can on support, bond or weld the fuse of one or more same size or different size according to actual conditions, so just reduced raw-material kind, not only be beneficial to material procurement, can also under identical size, derive many moneys product.

5: the product structure that the utility model provides is firm, and the product reliability height because fuse is to be wrapped in the Foamex, thereby has been avoided the exhausting problem of fuse when sealing of other solid constructions, and is more favourable for producing.

Description of drawings

Fig. 1 is the fuse schematic diagram of typography in the prior art.Wherein 1 is electrode, 2 melt parts for printing, and 3 is substrate.

Fig. 2 is the integral support structural representation.

Fig. 3 is the structural representation after integral support is sealed.

Fig. 4 is the front view that Fig. 3 is cut into single fuse.

Fig. 5 is the agent structure schematic diagram of embodiment two of the present utility model.

In Fig. 2-Fig. 5,4 is support, and 5 is fuse, and 6 is encapsulated layer.

Embodiment:

The preparation of the utility model fuse: on a conducting bracket, form a plurality of little cell array supports (as Fig. 2), identical with other unit all on each carrier unit, this support adopts punching press, electric plating method to form, with fuse bonding or be welded on the face electrode of wiring board, encapsulating material wraps fuse and solder joint or bonding point and part support, and with support between driving fit be connected, seal shape and can be circle, also can also can be not limited to above any form for square.And then, form this product with the entire bracket incision.

Above-mentioned fuse according to different products, can be one or more of.The fuse diameter does not wait from 15 microns to 500 microns.

During production, at first support 4 is done cleaning, can be in supersonic wave cleaning machine remove the dust of rack surface is dirty, this support is placed in the special fixture, use the method for ultrasonic wire bonding or solder attach then, fuse 5 is fixed on the electrode of support one end.Owing to adopt machine to advance silk, chopping automatically, the length basically identical of filament, thus guaranteed the performance of product itself.The method of fuse materials can be pressure welding or pompon weldering in bonding on the support or welding, but also can be not limited to these two kinds of methods as herein described.An end that support is fixed fuse is placed in the mould, and injecting frothing material 6 in mould covers fuse and part support with expanded material 6 again, carries out the heat-insulation pressure keeping of certain hour then, dries sclerosis.Cutting again is divided into single fuse device with the support of integral body after the sclerosis.

In order to satisfy different specification needs, in the time of on the electrode that fuse is fixed on support, can according to circumstances select one or more of silk materials, seal according to the method described above then, cut and obtain single fuse device.

Embodiment one

As shown in Figure 3, Figure 4, single fuse 5 is soldered or be bonded in the electrode zone of support, and encapsulated layer 6 is fuse 5 parcels, and closely pastes mutually with support 4, has guaranteed the seal of sealing.

Embodiment two

As Fig. 5, shown in Figure 6, two fuses 5 are soldered or be bonded in the electrode zone of support, and encapsulated layer 6 is fuse 5 parcels, and closely paste mutually with support 4, guaranteed the seal of sealing.

To carry out the performance comparison test with the product of this explained hereafter and the product of traditional approach, the product of this explained hereafter, its resistance is more stable, same batch product resistance maximin is in 5 milliohms, voltage drop can be controlled at 5%, its operating chacteristics industry is very consistent, and this feasibility that has proved absolutely this technology is with advanced.

Claims (2)

1. a plug-in type silky fuse comprises support, fuse, encapsulated layer; It is characterized in that, described support is an electric conducting material, it has two terminations at least is planar structure, this plane constitutes connection electrode, described fuse bonds or is welded on the face electrode of support, fuse is wrapped in the encapsulated layer together with bonding point or pad and part support, and the part of support exposes outside encapsulated layer, constitutes to connect pin.

2. plug-in type silky fuse according to claim 1 is characterized in that enclosure layer is a foamable polymer.

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