TW201611070A - Integrated fuse resistor assembly - Google Patents

Abstract

The present invention provides an integrated fuse resistor assembly. The integrated fuse resistor assembly comprises: a resistor having a resistance load; a fuse having a fuse load; and a connection unit having two side parts inserted therein the resistance load and the fuse load, respectively, so as to connect the resistance load and the fuse load.

Description

Integrated fuse resistor component

The present invention relates to an integrated fuse resistor component.

In general, when the circuit of an electronic product is turned on, it may be damaged by an inrush current generated, an increase in internal temperature, a continuous overcurrent, and the like.

In order to prevent malfunction of the electronic product caused by such damage, a resistor or a fuse or the like is provided at the power input end of the circuit to protect the power supply circuit.

However, setting fuses and resistors separately is complicated. They need to be welded separately, so two welds are required.

To avoid this, solder the leads of the fuse and resistor to connect the two in advance. This also leads to the inability to reduce complicated welding operations.

Further, after welding, the welded portion is easily broken, resulting in unstable connection between the fuse and the resistor.

It is an object of the present invention to provide an integrated fuse resistor component that does not require subsequent connection work between each other by manufacturing resistors and fuses in an integrated manner.

To achieve the technical problem, an integrated fuse resistor component according to an embodiment of the present invention may include: a resistor having a resistive load; a fuse having a fuse load; and a connection unit having the resistor load and the fuse load inserted separately The two sides of the connection are connected to the resistive load and the fuse load.

Here, the connecting unit can be formed in a single piece structure.

Here, the connecting unit includes a conductive clip holder including: a first fixing groove for inserting the resistive load; and a second fixing groove for inserting the fuse load.

Here, the holder may further include a partition wall for partitioning the first fixing groove and the second fixing groove.

Here, the resistor may further include: an electric wire wound to the resistive load and electrically connected to the connecting unit; and a protective portion surrounding the electric wire formed of a crucible material.

Here, the fuse may further include: a short-circuit portion coated on the outside of the fuse load and electrically connected to the connection unit; and a trigger portion disposed to surround the short-circuit portion to facilitate short-circuiting of the short-circuit portion.

Here, the trigger portion may include an epoxy resin film disposed along a circumferential direction of the fuse load to promote temperature rise of the short circuit portion.

Here, the road portion may include a tin layer disposed between the outer peripheral surface of the fuse load and the epoxy resin film.

Here, the integrated fuse resistor element may further include an integral molding unit that covers the protection portion and the trigger portion.

Here, the molding unit may be formed of a crucible having a hardness higher than that of the protection portion.

1000‧‧‧Resistor components

100‧‧‧Resistors

101‧‧‧1st lead

110‧‧‧resistive load

130‧‧‧Resistance cap

150‧‧‧Wire

170‧‧‧Protection Department

200‧‧‧Fuse

201‧‧‧2nd lead

210‧‧‧Fuse load

230‧‧‧Fuse cap

250‧‧‧ Short circuit

251‧‧‧ Silver nitrate film

253‧‧‧ tin film

270‧‧‧Trigger

300‧‧‧ Connection unit

310‧‧‧1st fixing slot

330‧‧‧2nd fixing slot

350‧‧‧ next door

400‧‧‧Molding unit

1 is a partial cross-sectional view showing an integrated fuse resistor element 1000 in accordance with an embodiment of the present invention; and FIG. 2 is a view for explaining an integrated fuse resistor element 1000 according to an embodiment of the present invention illustrated in FIG. A cross-sectional view of the internal structure; and a third view is a cross-sectional view of an essential part showing a portion related to the connecting unit 300 of Fig. 2.

DETAILED DESCRIPTION OF THE INVENTION In the following, an integrated fuse resistor element in accordance with a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present specification, even if it is a different embodiment, the same (similar) reference numerals are given to the same (similar) configurations, and the description thereof is replaced with the above description.

1 is a partial cross-sectional view showing an integrated fuse resistor component 1000 in accordance with an embodiment of the present invention.

Referring to the figure, the integrated fuse resistor component 1000 includes a resistor 100, a fuse 200, a connection unit 300, and a molding unit 400.

The resistor 100 is an element for exerting a function of a resistor and limiting an inrush current. The resistor 100 may be in the form of winding the electric wire 150 onto the resistive load 110 (refer to FIG. 2). The first lead 101 can be extended from the resistance cap 130 formed at one end portion of the resistor 100.

The fuse 200 is an element that shorts the circuit connection in accordance with an overcurrent or heat. The second lead 201 corresponding to the first lead 101 can be extended from the fuse cap 230 formed at one end of the fuse 200.

The connection unit 300 is a structure in which the resistor 100 and the fuse 200 are respectively inserted. Accordingly, the connection unit 300 connects the resistor 100 and the fuse 200 to one. At this time, the connection unit 300 is located between the resistor 100 and the fuse 200, forming a line with them.

The molding unit 400 is configured to surround the resistor 100, the fuse 200, and the connection unit 300. The molding unit 400 integrally forms the resistor 100, the fuse 200, and the connection unit 300, that is, a piece.

According to this configuration, the connection between the resistor 100 and the fuse 200 becomes stronger.

Further, the resistor 100 and the fuse 200 are connected to each other to form one piece.

Next, the specific structure of the above-described resistor 1000 will be described with reference to FIG. Fig. 2 is a cross-sectional view for explaining the internal structure of the integrated fuse resistor element 1000 illustrated in Fig. 1 according to an embodiment of the present invention.

Referring to the figure, first, the resistor 100 may include a first lead 101, a resistive load 110, a resistor cap 130, an electric wire 150, and a protection portion 170.

The first lead 101 is extended from the resistance cap 130. The first lead 101 is connected to the circuit board.

The resistive load 110 has a generally cylindrical shape. The resistive load 110 can be formed from a ceramic material.

The resistance cap 130 is coupled to one end of the resistive load 110. The resistance cap 130 has a diameter larger than the resistance load 110 and is formed of a metal material.

The wire 150 is capable of withstanding higher currents without fusing. For example, the wire 150 may be formed of an alloy of copper (Cu) and nickel (Ni). The wire 150 is wound into the resistive load 110 in a spiral form. One end of the electric wire 150 is connected to the resistance cap 130, and the other end is connected to the connection unit 300.

The protection portion 170 is applied to the resistive load 110 to enclose the electric wire 150. The protection portion 170 may be formed of a crucible material, specifically, a liquid crucible. According to this, the protection portion 170 can prevent the wire 150 from being scattered when the electric wire 150 is broken by an overcurrent.

Secondly, the fuse 200 can have the second lead 201, the fuse load 210, and the fuse. The wire cap 230, the short circuit portion 250 and the trigger portion 270.

The second lead 201 is extended from the fuse cap 230. The second lead 201 corresponds to the first lead 101. Similarly to the first lead 101, the second lead 201 may be in the form of tin plating on a copper wire. If the tin is less than 30% by weight, the weldability is not good, and if it exceeds 40% by weight, the conductivity is not good.

The fuse load 210 is cylindrical and is formed by extension. The fuse load 210 can be formed from a ceramic material containing alumina. At this time, the ceramic may contain 55% by weight to 85% by weight of alumina.

If the alumina is less than 55% by weight, the content of components other than alumina increases, resulting in a sharp drop in economy. Further, when the alumina exceeds 80% by weight, the electrical conductivity is drastically lowered. The inventors believe that the content of such alumina is preferably from 55% by weight to 70% by weight.

The fuse cap 230 is disposed to one end portion along the length direction of the fuse load 210. Further, the fuse cap 230 is formed of a conductive material.

Specifically, the fuse cap 230 may include: a plate made of copper; and a gold plating layer formed by plating 30% by weight to 40% by weight of tin on the surface of the plate with respect to 100% by weight of the plate. Here, the advantage of copper is that the economic effect is good and the electrical resistance is low. Further, tin makes the weldability between the second lead 201 and the fuse cap 230 good.

The short-circuit portion 250 is a portion that connects the fuse cap 230 and the connection unit 300. Specifically, the short-circuit portion 250 may include a tin layer coated on the outer circumferential surface of the fuse load 210.

Specifically, the tin layer may be composed of a silver nitrate film 251 which is plated with gold nitrate on the outer peripheral surface of the fuse load 210 washed with hydrochloric acid, and a tin film 253 on which a tin alloy is plated.

The tin layer can be formed on the outer peripheral surface of the fuse load 210 by a thickness of 2 μm to 10 μm. When the thickness of the tin layer is less than 2 μm, it is difficult to plate gold, and the short circuit of the short-circuit portion 250 cannot be smoothly achieved. Also, if the thickness of the tin layer exceeds 10 μm, the short circuit of the short-circuit portion 250 may be too fast (too sensitive).

The trigger portion 270 is arranged to enclose the short-circuit portion 250 to facilitate short-circuiting of the short-circuit portion 250. Specifically, the trigger portion 270 may be an epoxy resin film arranged along the circumferential direction of the fuse load 210, which is a ring that promotes the temperature rise of the short-circuit portion 250 according to the heat applied by the short-circuit portion 250. A film formed of an oxy resin.

The connecting unit 300 is for inserting the resistive load 110 and the fuse load 210 respectively Into the structure. Further, it is also a portion that is connected to one end of each of the electric wire 150 and the short-circuit portion 250. The connection unit 300 is formed as an electrical conductor. The specific structure of the connection unit 300 will be described with reference to FIG.

Referring back to FIG. 2, the molding unit 400 is configured to surround the resistive load 110, the fuse 200, and the connection unit 300 to form an appearance of the resistor 1000. Accordingly, the resistor 1000 can be a one piece structure.

The molding unit 400 may be formed of a tantalum material. At this time, the hardness of the crucible of the molding unit 400 may be greater than the crucible of the protection portion 170. According to this, the molding unit 400 can protect the entire resistor 1000 more firmly.

According to this configuration, the short-circuit portion 250 can be blown by the heat of the setting reference or more applied to the fuse 200. At this time, since the tin layer is provided, the short-circuit portion 250 can be blown in a short time shorter than the conventional one.

Specifically, the melting point of nickel which has been conventionally used is 1455 ° C, and the melting point of copper is 1084.5 ° C. However, the melting point of tin of tin film 253 is 231.93 ° C, and the melting point of silver nitrate of silver nitrate film 251 is only 212 ° C. In other words, since the melting point of the short-circuit portion 250 is only 1/5 to 1/7 of the conventional material, the short-circuit portion 250 can be blown more quickly.

Tin, which is a main component of the tin layer, is difficult to directly gold plated to the fuse load 210. In order to solve this problem, in the present embodiment, the following method is employed: First, a silver nitrate film 251 plated with silver nitrate is formed on the outer peripheral surface of the fuse load 210 washed with hydrochloric acid, and second, a tin plated with tin alloy is formed on the silver nitrate film 251. Membrane 253. According to this configuration, the short-circuit portion 250 can react to the heat of the reference or more applied by the resistor 100, and is quickly short-circuited.

Further, the fuse of the short-circuit portion 250 is accelerated by the trigger portion 270. In this regard, the trigger portion 270 will be specifically described with reference to the experimental results of Table 1 of the fuse 200 using the epoxy resin film.

As can be seen from the above experimental results, as a result of applying the epoxy resin film as the trigger portion 270, the short circuit of the fuse 200 was realized on average at 39.74 seconds. However, when the epoxy resin film was not applied, the short circuit of the resistance type fuse was realized on average at 49.04 seconds.

Therefore, as the trigger portion 270, the epoxy resin film can shorten the short circuit time by an average of about 9.7 seconds. This roughly shortens the short circuit time by about 20%.

The configuration related to the above-described connection unit 300 will be described with reference to Fig. 3 . Fig. 3 is a cross-sectional view showing an important part of a portion related to the connecting unit 300 of Fig. 2.

Referring to the figure, the connection unit 300 is an electrical conductor formed of a single piece. Specifically, the connection unit 300 may be a holder including the first fixing groove 310 and the second fixing groove 330. Here, the first fixing groove 310 and the second fixing groove 330 may be provided to be open in opposite directions.

The holder may further include a partition wall 350 that partitions the first fixing groove 310 and the second fixing groove 330.

According to the above configuration, the resistive load 110 can be inserted into the first fixing groove 310, and the fuse load 210 can be inserted into the second fixing groove 330. Accordingly, the connection between the resistive load 110 and the fuse load 210 can be easily achieved by the holder.

Further, when the partition wall 350 is provided, when the resistive load 110 and the fuse load 210 are inserted into the first fixing groove 310 and the second fixing groove 330, respectively, the depth of insertion can be fixed.

The integrated fuse resistor element as described is not limited to the configuration and mode of operation of the embodiments described above. For the embodiments, various modifications may be made by selectively combining all or part of the various embodiments.

According to the integrated fuse resistor element constructed as described above, the resistor and the fuse are integrally manufactured without subsequent connection work. According to this, workability at the time of loop configuration can be improved.

Moreover, the welding is excluded when the resistor and the fuse are connected, so that the problem of cumbersome soldering and short-circuiting of the soldering portion can be avoided.

1000‧‧‧Resistor components

100‧‧‧Resistors

130‧‧‧Resistance cap

150‧‧‧Wire

200‧‧‧Fuse

230‧‧‧Fuse cap

270‧‧‧Trigger

300‧‧‧ Connection unit

400‧‧‧Molding unit

Claims (12)

An integrated fuse resistor component comprising: a resistor having a resistive load; a fuse having a fuse load; and a connection unit having two sides for inserting the resistive load and the fuse load respectively, connecting the resistive load and the fuse load. The integrated fuse resistor element according to claim 1, wherein the connecting unit is formed in a single piece structure. The integrated fuse resistor component of claim 1, wherein the connection unit comprises a conductive clip holder, the conductive clip holder comprising: a first fixing groove for inserting the resistive load; and a second fixing groove Used to insert the fuse load. The integrated fuse resistor component of claim 3, wherein the conductive clip further comprises: a partition wall for spacing the first fixing groove and the second fixing groove. The integrated fuse resistor component of claim 1, wherein the resistor further comprises: an electric wire wound to the resistive load and electrically connected to the connecting unit; and a protection portion surrounding the electric wire, Material formation. The integrated fuse resistor component of claim 5, wherein the fuse further comprises: a short circuit portion coated on the outside of the fuse load, electrically connected to the connection unit; and a trigger portion to surround the The short-circuit portion is arranged in such a manner as to promote short-circuiting of the short-circuit portion. The integrated fuse resistor component according to claim 6, wherein the trigger portion includes an epoxy resin film disposed along a circumferential direction of the fuse load to promote temperature rise of the short circuit portion. The integrated fuse resistor component according to claim 7, wherein the short-circuiting portion comprises: a tin layer disposed between an outer peripheral surface of the fuse load and the epoxy resin film. An integrated fuse resistor component according to claim 8 of the scope of the patent application, wherein The tin layer includes a silver nitrate film which is plated with silver nitrate on the outer peripheral surface of the fuse load, and a tin film which is a tin-plated alloy on the silver nitrate film. The integrated fuse resistor component of claim 6, wherein the fuse further comprises a conductive fuse cap coupled to the fuse load, the fuse cap comprising: a copper plate; and a gold plating layer, relative to 100% by weight of the plate was formed by plating 30% by weight to 40% by weight of tin on the plate. The integrated fuse resistor component according to claim 6, further comprising: an integral molding unit covering the protection portion and the trigger portion. The integrated fuse resistor component of claim 11, wherein the hardness of the crucible of the molding unit is higher than the hardness of the crucible of the protection portion.