CN112863969A

CN112863969A - Fuse protector

Info

Publication number: CN112863969A
Application number: CN202110071908.1A
Authority: CN
Inventors: 詹小青; 赵志成; 严心亮
Original assignee: Dongguan Advanced Surgetech Material Co ltd
Current assignee: Dongguan Advanced Surgetech Material Co ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-05-28

Abstract

The invention discloses a fuse, which comprises an insulating shell and a fuse wire main body, wherein a plurality of separated accommodating cavities are arranged in the insulating shell, the fuse wire main body comprises a fusing part and conductive electrodes positioned at two ends of the fusing part, the fusing part comprises a plurality of melts connected end to end, each melt is correspondingly arranged in each accommodating cavity, and the conductive electrodes extend out of the insulating shell. The fuse of the invention has higher safety performance.

Description

Fuse protector

Technical Field

The invention relates to the field of electrical protection elements, in particular to a fuse.

Background

Fuses, which are commonly used as circuit protection devices, make electrical connections to components of the circuit to be protected. The fuse commonly used in the prior art comprises an insulating housing and a fuse body arranged in a cavity of the insulating housing, wherein when an overcurrent condition occurs, the fuse body melts to cut off a circuit, so that a component or the circuit to be protected is prevented from being damaged. The melt may form an arc during melting, which, if not extinguished, may further damage the circuit to be protected by allowing unwanted current to flow to the circuit components, and it is therefore desirable to extinguish the arc as quickly as possible. However, the cavities of the insulating housing are communicated singly, and the electric arcs generated when the melt is melted are easy to fuse with each other, so that larger combustion is caused, larger energy is released, and the safety of the conventional fuse is not high.

Therefore, a need exists for a fuse that avoids arc fusion to overcome the above-mentioned drawbacks.

Disclosure of Invention

The invention aims to provide a fuse capable of avoiding arc fusion.

In order to achieve the purpose, the fuse protector comprises an insulating shell and a fuse wire main body, wherein a plurality of separated accommodating cavities are formed in the insulating shell, the fuse wire main body comprises a fusing part and conductive electrodes positioned at two ends of the fusing part, the fusing part comprises a plurality of end-to-end connected melts, each melt is correspondingly arranged in each accommodating cavity, and the conductive electrodes extend out of the insulating shell.

Preferably, the fusing part of the present invention is arranged in a bent structure.

Preferably, the insulating housing of the present invention includes an insulating upper housing and an insulating lower housing, the insulating upper housing is provided with a plurality of upper receiving slots arranged adjacently along a length direction thereof, the insulating lower housing is provided with a plurality of lower receiving slots arranged adjacently along a length direction thereof, and the upper receiving slots and the lower receiving slots are communicated with each other to form the receiving cavity.

Preferably, the insulating upper case, the insulating lower case and the fuse body of the present invention are riveted together by a rivet.

Preferably, the insulating housing of the invention is internally provided with two oppositely arranged fuse bodies, and the conductive electrodes at the same ends of the two fuse bodies are mutually attached and arranged.

Preferably, the melt of one of the two fuse bodies of the present invention is disposed in the upper receiving groove, and the melt of the other of the two fuse bodies is disposed in the lower receiving groove.

Preferably, the fuse body of the invention is located at one side of the fuse body, an installation part is arranged between two adjacent fuse bodies, the installation part is of a bent structure, the two adjacent upper containing grooves are separated by an upper partition part, the two adjacent lower containing grooves are separated by a lower partition part, the installation part of one of the two fuse bodies is clamped on the upper partition part, and the installation part of the other of the two fuse bodies is clamped on the lower partition part.

Preferably, the middle part of the melt is provided with a through hole.

Preferably, the fuse wire body of the invention is a sheet-shaped member, and the cross-sectional area of the conductive electrode is larger than that of the melt.

Preferably, the conductive electrode of the present invention is provided with a wiring hole.

Compared with the prior art, the fuse protector comprises an insulating shell and a fuse wire main body, wherein a plurality of separated accommodating cavities are formed in the insulating shell, the fuse wire main body comprises a fusing part and conductive electrodes positioned at two ends of the fusing part, the fusing part comprises a plurality of end-to-end connected melts, each melt is correspondingly arranged in each accommodating cavity, and the conductive electrodes extend out of the insulating shell. Therefore, a plurality of independent accommodating cavities are arranged in the insulating shell, and each melt is arranged in one independent accommodating cavity. Let the fuse when the short circuit of system produces electric arc, every electric arc all independently burns in respective holding chamber, is favorable to the arc extinguishing, avoids electric arc to fuse and produces bigger energy together to improve safety in utilization greatly. Specifically, the fusing part is arranged in a bent structure, so that generated electric arcs are not coplanar as much as possible, and fusion of the electric arcs is avoided.

Drawings

Fig. 1 is a schematic perspective view of a fuse according to the present invention.

Fig. 2 is a sectional view of the three-dimensional structure taken along line a-a in fig. 1.

Fig. 3 is a schematic perspective exploded view of the fuse of the present invention.

Fig. 4 is a schematic perspective view of the fuse body according to the present invention.

Fig. 5 is a front view of the fuse body shown in fig. 4.

Fig. 6 is a perspective view illustrating the insulating lower case of the present invention.

Fig. 7 is a perspective view of the insulating upper case of the present invention.

Detailed Description

In order to explain technical contents and structural features of the present invention in detail, the following description is made with reference to the embodiments and the accompanying drawings.

As shown in fig. 1 to 3, the fuse 100 of the present invention includes an insulating housing 10 and a fuse body 20, wherein a plurality of separated accommodating cavities 11 are disposed in the insulating housing 10, the fuse body 20 includes a fuse portion 21 and conductive electrodes 22 disposed at two ends of the fuse portion 21, the fuse portion 21 includes a plurality of end-to-end fuses 211, each fuse 211 is disposed in each accommodating cavity 11, and the conductive electrodes 22 extend out of the insulating housing 10. In this way, a plurality of independent accommodating cavities 11 are provided in the insulating housing 10, and each melt 211 is provided in one independent accommodating cavity 11. When the fuse 100 generates electric arcs due to system short circuit, each electric arc is independently combusted in the corresponding accommodating cavity 11, arc extinction is facilitated, electric arcs are prevented from being fused together to generate larger energy, and accordingly use safety is greatly improved. Specifically, the fusing part 21 is arranged in a bent structure so that generated arcs are not coplanar as much as possible, and fusion of the arcs is avoided.

As shown in fig. 1, 2, 3, 6 and 7, the insulating housing 10 includes an insulating upper shell 12 and an insulating lower shell 13, the insulating upper shell 12 has a plurality of upper receiving slots 121 disposed adjacently along a length direction thereof, the insulating lower shell 13 has a plurality of lower receiving slots 131 disposed adjacently along a length direction thereof, and the upper receiving slots 121 and the lower receiving slots 131 are oppositely communicated to form the receiving cavity 11. The insulating case 10 has a simple structure and is easily installed between the fuse body 20 and the insulating case. Specifically, the upper insulating case 12, the lower insulating case 13, and the fuse body 20 are riveted together by a rivet 40, so that the structure of the fuse 100 is more stable and firm.

As shown in fig. 1, fig. 2, fig. 3, fig. 6 and fig. 7, two fuse bodies 20 are disposed opposite to each other in the insulating housing 10, and the conductive electrodes 22 at the same ends of the two fuse bodies 20 are disposed in close contact with each other. In this way, the resistance of the fuse 100 can be reduced, and the current passing performance can be improved. Specifically, the melt 211 of one of the two fuse bodies 20 is disposed in the upper receiving groove 121, and the melt 211 of the other of the two fuse bodies 20 is disposed in the lower receiving groove 131, so that the melts 211 of the two fuse bodies 20 are farther apart, and the probability of arc fusion is reduced. More specifically, the melt 211 is located at one side of the fuse body 20, a mounting portion 212 is located between two adjacent melts 21, the mounting portion 212 is a bent structure, two adjacent upper receiving grooves 121 are separated by an upper partition portion 122, two adjacent lower receiving grooves 131 are separated by a lower partition portion 132, the mounting portion 212 of one of the two fuse bodies 20 is clamped on the upper partition portion 122, and the mounting portion 212 of the other of the two fuse bodies 20 is clamped on the lower partition portion 132. The mounting portion 212 is provided to facilitate stable mounting of each of the two fuse bodies 20 to the insulating upper case 12 and the insulating lower case 13.

As shown in fig. 1 to 5, a through hole 2111 is formed in the middle of the melt 211, so that the cross-sectional area of the middle of the melt 211 is smaller, the melt 211 is more easily fused when a short-circuit accident occurs, and an open circuit is quickly formed. For example, the through-holes 2111 are arranged in a square through-hole, but not limited thereto. The fuse body 20 is a sheet-like member, and the cross-sectional area of the conductive electrode 22 is larger than that of the melt 211. Thus, the electrical resistance of the fuse element 211 is relatively greater, allowing the fuse element 211 to blow more quickly in the event of a short circuit, while the electrical resistance of the conductive electrode 22 is relatively less, allowing the fuse 100 to better electrically interface with the protected components. To facilitate electrical connection of the fuse 100 to the component to be protected, the conductive electrode 22 is provided with wiring holes 221.

Compared with the prior art, the fuse 100 of the invention comprises an insulating shell 10 and a fuse main body 20, wherein a plurality of separated accommodating cavities 11 are arranged in the insulating shell 10, the fuse main body 20 comprises a fusing part 21 and conductive electrodes 22 positioned at two ends of the fusing part 21, the fusing part 21 comprises a plurality of end-to-end connected melts 211, each melt 211 is correspondingly arranged in each accommodating cavity 11, and the conductive electrodes 22 extend out of the insulating shell 10. In this way, a plurality of independent accommodating cavities 11 are provided in the insulating housing 10, and each melt 211 is provided in one independent accommodating cavity 11. When the fuse 100 generates electric arcs due to system short circuit, each electric arc is independently combusted in the corresponding accommodating cavity 11, arc extinction is facilitated, electric arcs are prevented from being fused together to generate larger energy, and accordingly use safety is greatly improved. Specifically, the fusing part 21 is arranged in a bent structure so that generated arcs are not coplanar as much as possible, and fusion of the arcs is avoided.

The above disclosure is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, so that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.

Claims

1. The utility model provides a fuse, includes insulating housing and fuse main part, its characterized in that, be equipped with a plurality of spaced holding chambeies in the insulating housing, the fuse main part includes fusing portion and the conductive electrode that is located fusing portion both ends, fusing portion includes a plurality of end to end's fuse-element, each the fuse-element respectively corresponds and locates each in the holding chamber, conductive electrode stretches out outside the insulating housing.

2. The fuse as recited in claim 1, wherein the fusing portion is arranged in a folded configuration.

3. The fuse of claim 2, wherein the insulative housing includes an upper insulative housing and a lower insulative housing, the upper insulative housing defining a plurality of upper receiving slots disposed adjacent to each other along a length thereof, the lower insulative housing defining a plurality of lower receiving slots disposed adjacent to each other along a length thereof, the upper receiving slots and the lower receiving slots being in opposing communication to each other to form the receiving cavity.

4. The fuse of claim 3, wherein the insulative upper case, the insulative lower case, and the fuse body are riveted together by a rivet.

5. A fuse as defined in claim 3, wherein said insulating housing has two fuse bodies disposed opposite to each other, and conductive electrodes disposed on the same ends of said two fuse bodies are attached to each other.

6. The fuse of claim 5, wherein the melt of one of the two fuse bodies is disposed in the upper receiving groove, and the melt of the other of the two fuse bodies is disposed in the lower receiving groove.

7. The fuse of claim 6, wherein the fuse body is located at one side of the fuse body, a mounting portion is provided between two adjacent fuse bodies, the mounting portion is of a bent structure, two adjacent upper receiving slots are separated by an upper partition portion, two adjacent lower receiving slots are separated by a lower partition portion, the mounting portion of one of the two fuse bodies is clamped on the upper partition portion, and the mounting portion of the other of the two fuse bodies is clamped on the lower partition portion.

8. The fuse of claim 1, wherein the melt has a through hole in a middle portion thereof.

9. The fuse of claim 1, wherein the fuse body is a pellet and the conductive electrode has a cross-sectional area greater than a cross-sectional area of the melt.

10. The fuse as recited in claim 1, wherein the conductive electrode has a wiring hole formed therein.