KR102661015B1 - A variable capacity fuse - Google Patents

Abstract

The present invention relates to a variable capacity fuse. More specifically, the area of the element is formed to gradually become wider or narrower from one side of the housing to the other side, so that the current capacity can be varied, so that a single fuse can provide various current capacities. This relates to a variable capacity fuse that can be applied to electrical equipment.
For this purpose, a housing forming a hollow inner space penetrated on both sides; A pair of caps mounted on both ends of the housing to shield the internal space and electrically connected to an external terminal; an element installed in the inner space of the housing, with only one end soldered to a cap, and having a different area from one side of the inner space to the other; A conductor installed in the inner space of the housing, with only one end soldered to another cap; A variable capacity fuse is provided that is electrically connected between the conductor and the element and includes variable means installed to move back and forth on both sides along the element and the conductor.

Description

A variable capacity fuse}

The present invention relates to a variable capacity fuse, and more specifically, to a variable capacity fuse in which the area of the element is made larger or smaller from one side to the other, allowing one fuse to be applied to several electrical appliances with different current capacities. It's about.

In general, a fuse is a component that prevents damage to electrical components by quickly cutting off the power supply when the electrical components are overloaded when supplying power from an electrical supply source such as a battery to the electrical components. Even if heat is generated from the element during normal current, it maintains a state of thermal equilibrium with the surrounding environment. However, in the case of an abnormal current, the heat generated by the element becomes greater than the heat emitted to the surrounding environment, so the element blocks the current and extinguishes the arc through a softening-melting process to block the circuit. In other words, when an electrical component is overloaded relative to its capacity, the element inside the fuse melts and blows, thereby blocking power transmission to the electrical component and preventing damage to the electrical component. At this time, in the fuse, an element made of wire is generally used for currents of 10A or less, and for currents of 10A or more, a plate-shaped element with a certain thickness or made of a certain copper material is used.

Let us look at fuses different from the prior art with reference to FIG. 1. The fuse includes a housing 10 with an internal space, a first cap 20 and a second cap 20' that are mounted on both ends of the housing 10 to shield the internal space and are electrically connected to an external terminal, and a housing. It is installed in the inner space of (10), and the bent portions 17 and 18 at both ends are electrically connected to the first cap 20 and the second cap 20' by soldering, and the melting portion melts and melts when overloaded. It includes an element 16, and the bent portions 17 and 18 are electrically connected to the first cap 20 and the second cap 20' by soldering.

Meanwhile, since conventional fuses have a fixed current capacity, a fuse suitable for the required current capacity is required. In other words, the use of a fuse appropriate for the current capacity required by each electrical component is required, and there is an inconvenient problem of having to prepare a fuse appropriate for each electrical component. These fixed-capacity fuses cause the problem of low efficiency when maintaining electrical equipment in industrial sites.

Republic of Korea Registration No. 10-2080041

The present invention was created to solve the above problems, and the purpose of the present invention is to change the current capacity by changing the shape of the element, so that a single fuse can be applied to electrical equipment of various current capacities. The intention was to provide a fuse.

In order to achieve the above-described object, the present invention includes a housing forming a hollow inner space through which both sides are penetrated; A pair of caps mounted on both ends of the housing to shield the internal space and electrically connected to an external terminal; an element installed in the inner space of the housing, with only one end soldered to a cap, and having a different area from one side of the inner space to the other; A conductor installed in the inner space of the housing, with only one end soldered to another cap; A variable capacity fuse is provided that is electrically connected between the conductor and the element and includes variable means installed to move back and forth on both sides along the element and the conductor.

At this time, it is preferable that the area of the element gradually increases or decreases as it moves from one side of the internal space to the other side.

Additionally, the variable means may include a contact portion electrically connected between the conductor and the element; a change switch installed outside the housing; It is preferable to include a connection part connected between the contact part and the change switch.

At this time, a moving hole for moving the change switch is formed on a portion of the outer peripheral surface of the housing, and a shielding plate is formed at the connection portion to extend to the outside of the connection portion to shield the moving hole, and the shield plate is formed regardless of the position of the change switch. It is desirable to have a size that can shield the moving hole.

The variable capacity fuse according to the present invention has the following effects.

The present invention allows the current capacity for electricity to be varied by making the area of the plate-shaped element smaller or larger as it goes from one side to the other. Accordingly, the present invention has the effect of being applicable to various electrical equipment with one fuse. Furthermore, the present invention eliminates the need to provide individual fuses according to current capacity when performing maintenance work on electrical equipment in an industrial field, thereby increasing the efficiency of electrical equipment maintenance work.

1 is an exploded view of a fuse according to the prior art.
Figure 2a is a diagram showing a variable capacity fuse according to a preferred embodiment of the present invention.
Figure 2b is a diagram showing the variable means of the capacity variable fuse according to a preferred embodiment of the present invention.
3A and 3B are plan views showing a state in which the current capacity of a variable capacity fuse according to a preferred embodiment of the present invention is changed.
4A and 4B are diagrams showing a state in which the current capacity of the variable capacity fuse according to a preferred embodiment of the present invention is changed from the side.

Terms or words used in this specification and claims are not to be construed limited to their ordinary or dictionary meanings, and the inventor can appropriately define the concept of terms to explain his or her invention in the best way. It must be interpreted based on the meaning and concept consistent with the technical idea of the present invention.

Hereinafter, a variable capacity fuse according to a preferred embodiment of the present invention will be described with reference to the attached FIGS. 2A to 4B.

A variable capacity fuse allows a single fuse to be applied to electrical equipment with different current capacities. Accordingly, the capacity variable fuse can increase the convenience and efficiency of electrical equipment maintenance.

As shown in FIG. 2A, the variable capacity fuse includes a housing 100, a cap 200, an element 300, a conductor 400, and a variable means 500.

The housing 100 provides an internal space 110 in which the element 300 for energizing is installed, and has a hollow cylindrical shape with holes on both sides. The housing 100 is made of a transparent material, and a moving hole 120 penetrating the inside and outside is formed on one side of the outer peripheral surface of the housing 100. The moving hole 120 is a passage through which a change switch for changing current capacity can be moved, and is provided in a rectangular shape in the longitudinal direction of the housing 100. At this time, it is preferable that the current capacity is displayed step by step in the longitudinal direction of the moving hole 120 on the housing 100 surrounding the moving hole 120. Meanwhile, as shown in FIG. 4A, a guide piece 130 for moving the variable means 500, which will be described later, is preferably formed on the inner surface of the housing 100. The guide piece 130 is configured to guide the movement path of the variable means 500 to prevent it from deviating from the designated path. The guide piece 130 is formed below the moving hole 120 of the housing 100, and is spaced downward from the housing 100 to form a slide groove 131. At this time, the height of the slide groove 131 corresponds to the thickness of the shielding plate, which will be described later.

The cap 200 shields both sides of the open housing 100 and is electrically connected to an external terminal. The caps 200 are provided as a pair installed on both sides of the housing 100, and each cap 200 is provided so that the element 300 and the conductor 400 can be soldered. For convenience of explanation, the cap 200 to which the element 300 is soldered is referred to as the first cap 210, and the cap 200 to which the conductor 400 is soldered is referred to as the second cap 220.

The element 300 conducts electricity between the external terminal and the electrical equipment, and serves to block the current to the electrical equipment by melting when overcurrent occurs. The element 300 is provided in a plate shape and is installed in the internal space 110 of the housing 100. The element 300 is soldered only to the first cap 210. To be precise, only one end of the element 300 is soldered to the first cap 210. At this time, the area of the element 300 becomes larger or smaller when viewed in plan as it moves from one side to the other side in the longitudinal direction of the housing 100. That is, the element 300 is formed to have a different area from one side to the other in order to vary the current capacity, and in this specification, the area is formed to become gradually narrower from the first cap 210 to the second cap 220. Take as an example. The shape of this element 300 is triangular when viewed from the top of the housing 100 in the drawing. More preferably, both sides of the triangular element 300 are formed to be rounded. At this time, although not shown, the shape of the element 300 may be provided in various ways, and may be provided in a form where the area becomes smaller in a step-like manner from one side to the other.

The conductor 400 is configured to conduct electricity with the element 300 and is soldered to the second cap 220 of the housing 100. Only one end of the conductor 400 is soldered to the second cap 220 and is installed from the second cap 220 toward the element 300. Accordingly, an overlapped section is provided between the conductor 400 and the element 300 as shown in FIG. 3A. The shape of the conductor 400 is not specified, but it is preferably provided in the form of a straight line.

The variable means 500 serves to supply electricity to the element 300 and the conductor 400 and to vary the current carrying capacity. The variable means 500 allows the current capacity to be varied while moving between the large and small areas of the element 300. As shown in FIG. 2B, the variable means 500 includes a contact part 510, a change switch 520, a connection part 530, and a shielding plate 540. The contact portion 510 is configured to contact the element 300 and the conductor 400 to conduct electricity. The contact portion 510 is preferably formed as a square bar. The change switch is configured to allow the user to move the contact portion 510 to change the current capacity, and is located outside the housing 100. The change switch 520 moves along the moving hole 120 and reciprocates the contact portion 510 with respect to the length of the moving hole 120. The connection portion 530 connects the change switch 520 and the contact portion 510, and is preferably formed vertically between the change switch 520 and the contact portion 510. The shielding plate 540 serves to shield the moving hole 120 and is formed outward from the connection portion 530. The shielding plate 540 is formed in a square shape with a larger area than the area of the moving hole 120 so as to sufficiently shield the moving hole 120, and is formed to have a curvature corresponding to the curvature of the outer peripheral surface of the housing 100. do. As shown in FIG. 4A, the shielding plate 540 is positioned to move along the slide groove 131 of the housing 100, and the length of the shielding plate 540 is longer than the length of the moving hole 120. Thus, no matter where the change switch 520 is located in the moving hole 120, the moving hole 120 does not open. Meanwhile, the change switch 520, the connection part 530, and the shielding plate 540 are provided as non-conductors. At this time, the shielding plate 540 may be made of a material with elasticity to maintain the airtightness of the moving hole 120.

Hereinafter, the operation of the capacity change fuse configured as described above will be described.

The worker operates the change switch 520 in consideration of the current capacity flowing through the electrical equipment. When a fuse is applied to an electrical device with a relatively large current capacity, the operator moves the change switch 520 to the left in the drawing as shown in FIG. 3A, so that the contact portion 510 is moved to the area of the element 300 with a large area. and connect the conductor 400. At this time, the connection portion 530 of the variable means 500 is caught at the end of the moving hole 120, and the movement of the variable means 500 is restricted. Accordingly, since the melting area of the element 300 increases, the capacity variable fuse is in a state where the current capacity can be increased.

Meanwhile, when a fuse is applied to an electrical equipment with a relatively small current capacity, the operator moves the change switch 520 to the right in the drawing as shown in FIG. 3b, so that the contact portion 510 increases the area of the element 300. The conductor 400 is connected to a relatively small area. That is, as can be seen through FIGS. 3A and 3B, the contact portion 510 shown in FIG. 3B is located in a region where the area of the element 300 is reduced compared to the contact portion 510 shown in FIG. 3A. . At this time, as shown in Figure 4b, the shielding plate 540 moves along the slide groove 131, and even if the position of the change switch 520 changes, it can be seen that it continuously shields the moving hole 120. there is. Since the blown area of the capacity variable fuse in this state is reduced compared to the state shown in FIG. 3A, the capacity variable fuse is in a state where the current capacity can be reduced.

As explained so far, the variable capacity fuse according to the present invention allows one fuse to be applied to several electrical equipment with different current capacities. Accordingly, the present invention can reduce fuse manufacturing costs and increase convenience for maintenance of electrical equipment since there is no need to manufacture multiple fuses each corresponding to the current capacity.

Although the present invention has been described in detail with respect to the described embodiments above, it is obvious to those skilled in the art that various changes and modifications are possible within the technical scope of the present invention, and such changes and modifications naturally fall within the scope of the appended patent claims.

100: Housing 110: Internal space
120: moving ball 130: guide
131: slide groove 200: cap
210: first cap 220: second cap
300: element 400: conductor
500: variable means 510: contact part
520: change switch 530: connection part
540: shielding plate

Claims (4)

A housing with a hollow interior space penetrated on both sides and a moving hole formed on a portion of the outer circumferential surface;
a pair of caps mounted on both ends of the housing to shield the internal space and electrically connected to an external terminal;
An element installed in the inner space of the housing, with only one end soldered to a cap, and having a different area from one side of the inner space to the other;
A conductor installed in the inner space of the housing, with only one end soldered to another cap; and
It is electrically connected between the conductor and the element, and includes variable means installed to move back and forth on both sides along the element and the conductor,
The variable means is,
a contact portion electrically connected between the conductor and the element;
a change switch installed on the outside of the housing to be movable along the moving hole;
It includes a connection part connected between the contact part and the change switch,
A variable capacity fuse, wherein a shielding plate is formed at the connection portion and extends to the outside of the connection portion to shield the moving hole, and the shielding plate is sized to shield the moving hole regardless of the position of the change switch. According to paragraph 1,
The element is a variable capacity fuse, characterized in that the area of the element gradually increases or decreases from one side of the internal space to the other side.







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