KR102361578B1 - High voltage fuse - Google Patents

Abstract

The present invention relates to a high voltage fuse. The insulating housing 10 forms the exterior of the high voltage fuse of the present invention. The insulating housing 10 is divided into a first housing part 11 and a second housing part 12 , and an internal space 14 is formed therein. The inner space 14 is filled with an arc extinguishing material. A fuse element 20 is installed through the insulating housing 10 . The fuse element 20 is composed of terminal portions 22 at both ends and a fusing portion 24 in the middle, and the terminal portion 22 is made of multiple layers. The blocking plate 26 is integrally formed with the terminal part 22 , and the blocking plate 26 serves to shield the coupling part between the first housing part 11 and the second housing part 12 . A sleeve 40 may be further separately provided in the inner space 14 . According to the present invention of such a configuration, when a spark or explosion occurs in the fusing portion 24, there is an advantage that this is reliably blocked from being transmitted to the outside.

Description

High voltage fuse

The present invention relates to a high-voltage fuse, and more particularly, to a high-voltage fuse that blocks explosive force and sparks generated inside the fuse from being transmitted to the outside by utilizing a part of a fuse element.

The fuse is to prevent damage to the electrical components by quickly shutting off the power supply when the electrical components are overloaded in supplying power from an electrical supply source such as a battery to the electrical components. Recently, a fuse for use at a high voltage is required. As such, in the case of a fuse used at a high voltage, if the intensity of the spark generated during melting is large and severe, an explosion may occur.

However, in the case of a general high voltage fuse, the first housing part and the second housing part are combined with each other to form a single housing. There are many cases where it is transmitted to the outside and becomes a problem.

Japanese Patent No. 4192266

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems of the related art as described above, and to prevent a spark or explosive force generated from a high voltage fuse from being transmitted to the outside.

According to a feature of the present invention for achieving the above object, the present invention provides an insulating housing in which an arc extinguishing material is filled in the inner space and the first housing part and the second housing part are combined, and the inside of the insulating housing is melt-cut. A fuse element in which an additional portion is located and terminal portions connected to both ends of the fusing portion protrude to the outside of the insulating housing, and a portion integrally formed with the fuse element and coupled to the first housing portion and the second housing portion in the inner space may include a blocking plate to shield the It is composed of fuse parts at both ends of the fusing part, and the fuse part is formed by bending the first and second terminal forming parts or the third and fourth terminal forming parts at both ends of the basic terminal forming part in the width direction to be in close contact with the surface of the basic terminal forming part. and the blocking plate is connected to the first and second terminal forming units or the third and fourth terminal forming units by a connecting plate, the blocking plate having a width wider than the connecting plate, and the blocking plate having the first and second terminal forming units What is connected to the second terminal forming part or the third and fourth terminal forming parts by a connecting plate is bent to extend in opposite directions, and a sleeve is installed in the inner space of the insulating housing, and the outer surface of the sleeve is the inner space is seated on the inner surface of the , the sleeve is made in a cylindrical shape, and the fuse end portion of the fuse element can be positioned through the inside of the sleeve.

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In the high voltage fuse according to the present invention, the following effects can be obtained.

In the present invention, since a blocking plate for blocking the gap between the first and second housings is formed by extending a part of the terminal portion of the fuse element, the spark or explosive force generated inside the fuse is reliably blocked from being transmitted to the outside. Thus, it is possible to obtain the effect of preventing the breakage of the fuse and preventing the fire from being transmitted to the outside.

In particular, in the present invention, since a part of the material for making the fuse element is bent on the blocking plate, the high voltage fuse can be made without increasing the number of parts, so that the number of parts of the high voltage fuse can be minimized.

1 is a perspective view showing a preferred embodiment of a high voltage fuse according to the present invention.
Figure 2 is an exploded perspective view showing the configuration of the embodiment of the present invention.
3 is a cross-sectional perspective view showing the configuration of a fuse constituting an embodiment of the present invention;
4 is an exploded view of a fuse element constituting an embodiment of the present invention;
5 is an exploded perspective view showing another embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

As shown in the drawings, the insulating housing 10 forms the exterior of the high voltage fuse of the present invention. The insulating housing 10 is made of an insulating synthetic resin. The insulating housing 10 of this embodiment has a cylindrical shape as a whole, but it is not necessarily the case. The insulating housing 10 is divided into a first housing part 11 and a second housing part 12 . However, the insulating housing 10 does not necessarily have to be divided into two parts, the first housing part 11 and the second housing part 12 , and may be made separately in more numbers.

An inner space 14 is formed inside the insulating housing 10 . The fusing part 24 of the fuse element 20 to be described below is positioned in the inner space 14 . The inner space 14 is filled with an arc extinguishing material that blocks the transfer of the arc generated in the fusing part 24 .

Coupled ends 16 are formed at both ends of the insulating housing 10 . The coupling end 16 is formed to have a step difference to be relatively low compared to other parts of the insulating housing 10 . A coupling ring 30 to be described below is mounted on the coupling end 16 .

Passing slits 18 are formed at both ends of the insulating housing 10 . The passage slit 18 is a portion through which a fuse element 20 to be described below passes. The passing slit 18 is formed in at least one of the first housing part 11 and the second housing part 12 . For example, the passing slit 18 is formed only in the first housing part 11 , the passing slit 18 is formed only in the second housing part 12 , or the first housing part 11 and the second housing part 12 . ) through the slit 18 can be formed in both.

The fuse element 20 is made of a conductive metal material. Terminal portions 22 are formed at both ends of the fuse element 20 . The terminal part 22 protrudes to the outside of the insulating housing 10 . The terminal part 22 is used for electrical connection with the outside of the fuse. A fastening hole 23 is formed in the terminal part 22 . However, the configuration of the terminal part 22 may be various. For example, it may be made in the form of a tab terminal without the fastening hole 23 so as to be coupled to the counterpart terminal. The terminal part 22 is configured to extend in opposite directions from both ends in the present embodiment, but may be formed by bending the terminal part 22 to extend in the same direction.

A fusing part 24 is formed in the middle part of the fuse element 20 . The fusing part 24 is a part that melts and breaks when an overload is applied. The configuration of the fusing part 24 may vary according to the capacity of the fuse.

The terminal portion 22 is formed to be thicker than the fusing portion 24 . To this end, in this embodiment, a method of overlapping the base materials constituting the fuse element 20 is used. As shown in FIG. 4 , a base material constituting the fuse element 20 is made by using a single metal plate. In order for the terminal part 22 to be relatively thicker than the fusing part 24 in the base material constituting the fuse element 20, the fuse element 20 is formed at both ends of the basic terminal forming part 22-0. There is a first terminal forming part 22-1 and a second terminal forming part 22-2, and there is a third terminal forming part 22-3 and a fourth terminal forming part 22-4.

Here, based on the drawings, the first terminal forming part 22-1 and the second terminal forming part 22-2 are folded in close contact with different surfaces of the basic terminal forming part 22-0, and the third terminal forming part 22-0 is formed. The part 22-3 and the fourth terminal forming part 22-4 are folded in close contact with different surfaces of the other basic terminal forming part 22-0.

And, in the first to fourth terminal forming parts 22-1, 22-2, 22-3, 22-4, there is a blocking plate 26 to be connected by a connecting plate 27, the blocking plate ( 26) is bent so that adjacent ones face opposite directions. The width of the connecting plate 27 is formed to be smaller than that of the blocking plate 26 . The blocking plate 26 is bent orthogonally to the connecting plate 27 or the terminal forming parts 22-1, 22-2, 22-3, and 22-4.

In this way, the blocking plates 26 are made to extend in opposite directions to the terminal portions 22 at both ends. The blocking plate 26 blocks a portion of the first housing portion 11 and the second housing portion 12 in close contact with each other, that is, a portion of the gap portion when the first housing portion 11 and the second housing portion 12 are combined. Blocking the gap between the first housing part 11 and the second housing part 12 by the blocking plate 26 is well illustrated in FIG. 3 . The blocking plate 26 is connected to the terminal part 22 through a connection plate 27 . The width of the connecting plate 27 is the same as the width of the portion adjacent to the terminal portion 22 among the fused end portions 24 .

The coupling ring 30 is inserted into the coupling end 16 of the insulating housing 10 to prevent the first housing part 11 and the second housing part 12 from being separated. However, when the first housing unit 11 and the second housing unit 12 are coupled in a different way, the coupling ring 30 is not necessarily used. The inner diameter of the coupling ring 30 is formed smaller than the outer diameter of the insulating housing 10 at the portion corresponding to the coupling end 16 , so that the coupling ring 30 is press-fitted into the coupling end 16 .

Meanwhile, in the embodiment shown in FIG. 5 , a sleeve 40 is further added. The sleeve 40 is positioned in the inner space 14 of the insulating housing 10 . The sleeve 40 is made in a cylindrical shape, and the cylindrical sleeve 40 is positioned on inner surfaces of the first housing part 11 and the second housing part 12 so that their outer surfaces face each other. The outer surface of the sleeve 40 may be designed to be in close contact with the inner surfaces of the first housing part 11 and the second housing part 12 . The sleeve 40 serves to prevent a spark or explosive force from directly acting on the first housing part 11 and the second housing part 12 . By using the sleeve 40, it is possible to protect the inner surface of the insulating housing 10 adjacent to the fusing part 24, and at the same time to prevent the transmission of sparks or explosive force to the outside.

Hereinafter, assembly of the high voltage fuse according to the present invention having the above-described configuration will be described.

The high voltage fuse of the present invention allows the fusing part 24 of the fuse element 20 to be installed inside the insulating housing 10 . For example, in a state in which the fuse element 20 is mounted on the first housing unit 11 , the second housing unit 12 is coupled to the first housing unit 11 , and the first housing unit 11 . In a state in which the and the second housing part 12 are coupled, the coupling rings 30 are fitted to the coupling ends 16 of both ends. When the fuse element 20 is installed in the first housing part 11 , in the present embodiment, a portion corresponding to the connection plate 27 of the fuse element 20 is located in the through slit 18 . make it possible

In this way, the blocking plate 26 slightly protrudes from the edges of both ends of the first housing part 11 . In this state, the second housing part 12 is coupled to the first housing part 11 . Accordingly, the fusing part 24 of the fuse element 20 is positioned in the inner space 14 , and the terminal part 22 protrudes to the outside of the insulating housing 10 . In addition, the blocking plate 26 shields the portions coupled to each other at the ends of the first housing portion 11 and the second housing portion 12 from the inner space 14 side.

Next, an arc extinguishing material is filled in the inner space 14 to prevent the spark from being transmitted to the insulating housing 10 or the like even if a spark is generated at the fusing part 24 of the fuse element 20 . The structure and process for filling the inner space 14 with the arc extinguishing material is not the gist of the present invention and thus will not be described.

The high voltage fuse in the assembled state is as shown in FIG. 1 , and the opposite terminal is connected to the terminal part 22 protruding from both ends of the insulating housing 10 to make an electrical connection. And when an overload is applied during use, the fusing part 24 is melted and cut so that power is no longer supplied.

On the other hand, when the fusing part 24 is melted and broken, sparks may be generated and an explosion may occur. As such, sparks or explosive force should not be transmitted to the outside of the insulating housing 10, and the blocking plate 26 serves to prevent the spark or explosive force from being transmitted to the outside. In particular, when there is a gap between the fuse element 20 and the arc extinguishing material, sparks can be transmitted along the surface of the fuse element 20 . In this case, the blocking plate 26 is the insulating housing 10 . It serves to prevent the spark from being transmitted to the outside through the end of the

And FIG. 5 shows an example in which the sleeve 40 is installed in the inner space 14 of the insulating housing 10 . The sleeve 40 corresponds to the outer peripheral surface of the insulating housing 10, not both ends of the insulating housing 10, among the parts where the first housing part 11 and the second housing part 12 are coupled to each other. It plays a role in blocking the transmission of sparks to the outside through the gap of the part.

Therefore, when the slide 40 is placed inside the insulating housing 10 and the blocking plate 26 is placed on the fuse element 20, the Transmission of sparks or explosive force to the outside can be minimized.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Although described above, the insulating housing 10 may be made variously in addition to the cylindrical shape, and various structures may be employed in order to fill the internal space 14 with the arc extinguishing material.

In addition, although the configuration of the blocking plate 26 is rectangular in this embodiment, the shape of the blocking plate 26 is to block the gap between the first housing part 11 and the second housing part 12 . Anything you can do doesn't matter.

The fuse unit 22 is made of three layers in the illustrated embodiment, but it is not necessary, and it does not matter if only two or more layers are formed.

10: insulating housing 11: first housing part
12: second housing part 14: internal space
16; coupling end 18: through slit
20: fuse element 22: terminal part
22-0: basic terminal forming part 22-1: first terminal forming part
22-2: second terminal forming unit 22-3: third terminal forming unit
22-4: fourth terminal forming part 24: melting end part
26: blocking plate 27: connecting plate
30: coupling ring 40: sleeve

Claims (5)

An insulating housing in which the inner space is filled with an arc extinguishing material and the first housing part and the second housing part are combined;
a fuse element in which a fusing part is located inside the insulating housing and terminal parts connected to both ends of the fusing part protrude to the outside of the insulating housing;
and a blocking plate integrally formed with the fuse element to shield a portion where the first housing part and the second housing part are coupled in the inner space;
The terminal portion of the fuse element is made by overlapping a plurality of terminal forming portions, and the blocking plate is integrally formed on the terminal forming portion,
The fuse element includes a central fusing part and fuse parts at both ends of the fusing part. It is made by being bent in close contact with the surface of the forming part, and the blocking plate is connected to the first and second terminal forming parts or the third and fourth terminal forming parts by a connecting plate, and the blocking plate is wider than the connecting plate The blocking plate is bent so that those connected to the first and second terminal forming units or the third and fourth terminal forming units by a connecting plate extend in opposite directions,
A sleeve is installed in the inner space of the insulating housing, and the outer surface of the sleeve is seated on the inner surface of the inner space,
The sleeve is a high voltage fuse made in a cylindrical shape, and the fusing end of the fuse element is positioned through the inside thereof. delete delete delete delete

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