CN2309617Y - Fuse - Google Patents

Abstract

The utility model relates to a fuse, which comprises a metal casing and a conducting pin which is fixed on one end of the casing, a thermosensitive body is arranged in the metal casing, the lead-out foot of the other conducting pin at the sealing end of the casing passes through a ceramic block to insulate from the casing, and the end part of the conducting pin lies against the center hole of the metal gasket in the casing; a spring is arranged between the metal gasket and the ceramic block; the circumference wall of the current conducting contact tray for containing the metal gasket is provided with slots in an interphase way and is contacted with the casing. When the fuse of the utility model is jointed into the circuit, electrical current is communicated with the conducting pin on the other end by the conducting pin at one end through the metal gasket, the current conducting contact tray, and the metal casing. The utility model has the advantages of no bad contact in the operation state, and more stable and reliable fusing operation.

Description

Fuse

The utility model relates to a kind of fuse, and it is a kind of essential electronic element.

In electronics, electric equipment products, generally use a kind of at present with the fuse of synthetic material as thermo-detective material.This fuse is to utilize inner thermo-detective material to melt at a certain temperature, because the promotion of spring makes conductive contact film break away from guide pin, the electric current between the guide pin of fuse two ends is disconnected, thereby entire circuit is carried out overtemperature prote.Application number is " 96205896.3 ", " have the fuse that seals cap " and application number is " 96220372.6 ", " fuse ", though on outward appearance and inherent quality, done transformation, but still can not solve fuse and easily come in contact bad problem in working order the time.The main conduction of the part in addition contact disc difficulty of processing of fuse is big, and the consistency of profile is difficult to guarantee.

The utility model provides a kind of performance more reliable and stable at the defective of above-mentioned prior art to society, processes convenient novel fuse.

Task of the present utility model is achieved in that this fuse comprises metal shell, the guide pin that fixes with housing one end, and in the housing of this end, be placed with thermo-detective material, the leading foot of another root guide pin of housing sealing end passes ceramic block and housing insulation, the centre bore of metallic gasket compresses mutually in the end of this guide pin and the housing, the circle wall of conduction contact disc has groove, metallic gasket is placed in the conduction contact disc, the perisporium of conduction contact disc contacts with housing, between metallic gasket and ceramic block, be placed with spring, the centre bore of metallic gasket is tapered, the end of the guide pin that compresses mutually with it is a bullet, the high temperature insulation resin is arranged and seal cap at the sealing end of housing, and electric current is by the guide pin of fuse sealing end, pass through metallic gasket, conduction contact disc and metal shell communicate with other end guide pin, otherwise also can; Be placed with spring or elastomeric pad between thermo-detective material and conduction contact disc, it can improve the contact performance between guide pin end and metallic gasket and the conduction contact disc.

The conduction contact disc that the utility model adopts sheet metal to be stamped to form, and the metallic gasket of band centre bore is housed in inside process very simply, and assembling also is easy to, and the consistency of the overall dimension of other part can be guaranteed.Because the conduction contact disc is to be stamped to form by elasticity preferred metal thin slice, makes it and inner walls contact performance raising, thereby fundamentally overcome the problem that there is loose contact in working order the time in fuse.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a kind of structural representation of the present utility model.

Fig. 2 is an another kind of structural representation of the present utility model.

Fig. 3 is the enlarged side view of conduction contact disc.

Fig. 4 is the partial sectional view of Fig. 3.

Embodiment 1, as shown in Figure 1, the guide pin 11 that is fixedly connected with metal shell 4 one ends, in housing 4, put into thermo-detective material 10 successively, pad 9, spring 8, conduction contact disc 7, conduction contact disc 7 is to be stamped to form by sheet metal, its perisporium has groove, as Fig. 3, shown in Figure 4, and contact with metal shell 4, be placed with metallic gasket 13 in its dish, the leading foot of another root guide pin 1 of the sealing end of metal shell 4 passes ceramic block 5 and housing 4 insulation, the Zhui shape Zhong Xin Kong Beam-at-the-eaves of the metallic gasket 13 in the conical end of this guide pin 1 and the conduction contact disc 7 compresses, and is placed with upper spring 6 between metallic gasket 13 and ceramic block 5, then with metal shell 4 sealing end edge bevellings, put with what different colours was represented different fusing-off temperatures and seal cap 2, inject high temperature insulation resin 3 and seal curing.During use, with fuse two ends guide pin 11,1 difference place in circuit two ends, electric current is communicated with other end guide pin 11 by metallic gasket 13, conduction contact disc 7 and metal shell 4 by guide pin 1, and vice versa.Circuit hinders for some reason and generates heat, when reaching the fusing point of thermo-detective material 10, and thermo-detective material 10 fusings; because the promotion of spring 6, just the centre bore of metallic gasket 13 hightails the conical end of guide pin 1, the failure of current between guide pin 1 and the guide pin 11; circuit is disconnected, play the effect of overvoltage overtemperature prote.

Embodiment 2, as Fig. 2, Fig. 3, shown in Figure 4,1-guide pin, 2-seal cap, 3-insulating resin, 4-metal shell, 5-ceramic block, 6-spring, 7-conduction contact disc, 10-thermo-detective material, 11-guide pin, 12-elastomeric pad among the figure, the 13-metallic gasket, adorn an elastomeric pad 12 between the utility model conduction contact disc 7 and the thermo-detective material 10, it can be made by silicon rubber, can make the taper seat of guide pin 1 contact closelyr with metallic gasket 13 centre bores.Circuit hinders when overheated for some reason, thermo-detective material 10 fusings, and spring 6 promotes metallic gaskets 13 and breaks away from the end of guide pins 1, and circuit is disconnected.Its structure, principle and embodiment 1 mutually roughly the same do not remake enumeration at this.

Claims (3)

1, a kind of fuse, it comprises metal shell (4), the guide pin (11) that fixes with housing (4) one ends, in the housing (4) of this end, be placed with thermo-detective material (10), the leading foot of another root guide pin (1) of housing (4) sealing end passes ceramic block (5) and housing (4) insulation, the end of this guide pin (1) compresses mutually with the centre bore of the interior metallic gasket (13) of housing, be placed with spring (6) between metallic gasket (13) and the ceramic block (6), it is characterized in that the described alternate groove that has of circle wall that holds the conduction contact disc (7) of metallic gasket (13), and contact with housing (4).

2, according to claim 1 fast fuse, it is characterized in that between thermo-detective material (10) and conduction contact disc (7), being placed with spring (8).

3, fuse according to claim 1 is characterized in that being placed with pad (12) between thermo-detective material (10) and conduction contact disc (7).

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