CN112242219A - Fuse-resistor assembly and method of manufacturing a fuse-resistor assembly - Google Patents
Fuse-resistor assembly and method of manufacturing a fuse-resistor assembly Download PDFInfo
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- CN112242219A CN112242219A CN201911030249.6A CN201911030249A CN112242219A CN 112242219 A CN112242219 A CN 112242219A CN 201911030249 A CN201911030249 A CN 201911030249A CN 112242219 A CN112242219 A CN 112242219A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
- H01C3/14—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding
- H01C3/16—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding including two or more distinct wound elements or two or more winding patterns
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
- H01H69/02—Manufacture of fuses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/0241—Structural association of a fuse and another component or apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/08—Fusible members characterised by the shape or form of the fusible member
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/165—Casings
- H01H85/175—Casings characterised by the casing shape or form
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Fuses (AREA)
Abstract
Disclosed is a fuse-resistor assembly including: a first resistor and a second resistor that divide the applied current or voltage; a fuse located between the first resistor and the second resistor and having one side coupled with the first resistor and the other side coupled with the second resistor to be connected in series with the first resistor and the second resistor; and a ceramic tube having an accommodation space into which the first resistor, the second resistor, and the fuse are inserted. Here, an opening portion is formed in one side of the ceramic tube to allow the first resistor, the second resistor, and the fuse to be inserted into the ceramic tube, and the other side of the ceramic tube is completely closed, while a hollow portion is formed at the center to allow a first lead wire connected to the first resistor to pass therethrough.
Description
Cross Reference to Related Applications
This application claims priority and benefit from korean patent application No.2019-0086314, filed on 2019, 7, 17, the entire contents of which are incorporated herein by reference.
Background
1. Field of the invention
The present invention relates to a fuse-resistor assembly, and more particularly, to a fuse-resistor assembly including a fuse existing between resistors and a method of manufacturing the same.
2. Discussion of the prior art
In general, a micro fuse is mounted at a power input terminal of an electronic product such as a television, a video tape recorder, etc. to prevent a circuit from being damaged and a fire from occurring at a substrate by opening the circuit when an overcurrent flows in the circuit. The micro fuse is used for a circuit breaker in an abnormal situation such as an overload or the like due to its fusing performance.
In the case of a fuse, copper having a relatively low specific resistance value and a considerably high temperature coefficient and melting point is used as a material forming the fusible element layer, so that even when the rated nominal current becomes a high current of 10A or more, the fuse can be stably blown due to an overcurrent equal to or larger than the high current for a certain time while the current stably flows therethrough. Accordingly, fuses are used in home appliances such as large televisions, large monitors, and the like, instead of existing fuses.
However, the conventional fuse-resistor assembly has the following problems: the fuse does not have a constant fusing performance according to heat generation of the resistor and does not sensitively react to an overcurrent.
Disclosure of Invention
The present invention is directed to provide a fuse-resistor assembly that improves fusing performance of a fuse by connecting the fuse in series between resistors, and a method of manufacturing the same.
According to an aspect of the present invention, there is provided a fuse-resistor assembly including: a first resistor and a second resistor that divide the applied current or voltage; a fuse located between the first resistor and the second resistor and having one side coupled with the first resistor and the other side coupled with the second resistor to be connected in series with the first resistor and the second resistor; and a ceramic tube having an accommodation space into which the first resistor, the second resistor, and the fuse can be inserted, wherein an opening portion is formed in one side of the ceramic tube to allow the first resistor, the second resistor, and the fuse to be inserted therein, and the other side of the ceramic tube is completely closed, and at the same time, a hollow portion is formed at the center to allow a first lead wire connected to the first resistor to pass therethrough.
A ceramic tube, in order to secure an air buffer area, the first resistor, the second resistor, and the fuse may be spaced a distance or more from an inner circumferential surface forming the receiving space, and the opening portion and the hollow portion are molded to seal the receiving space from the outside.
The ceramic tube, the opening portion and the hollow portion may be molded using an epoxy resin material.
The fuse may include: a rod-shaped safety screw rod; and a fusible coating layer applied to a surface of the fuse rod and fused by an overcurrent generated at the first resistor and the second resistor.
The first resistor may include: a first resistor rod; a first external resistor cap coupled to one side of the first resistor rod; a first internal resistor cap coupled to the other side of the first resistor rod; and a first resistance wire configured to enclose the first resistor rod and connect the first outer resistor cover with the first inner resistor cover; and, the second resistor may include: a second resistor rod; a second external resistor cap coupled to one side of the second resistor rod; a second internal resistor cap coupled to the other side of the second resistor rod; and a second resistance line configured to enclose the second resistor rod and connect the second outer resistor cover with the second inner resistor cover.
The first internal resistor cover may include: a first resistor insertion groove having a groove configured to allow one side of the first internal resistor cover to be insertion-coupled with the other side of the first resistor rod; and a first fuse insertion groove having a groove configured to allow the other side of the first internal resistor cover to be insertedly coupled with one side of a fuse.
The second internal resistor cover may include: a second resistor insertion groove having a groove configured to allow one side of the second internal resistor cover to be insertion-coupled with the other side of the second resistor rod; and a second fuse insertion slot having a slot configured to allow the other side of the second internal resistor cover to be insertedly coupled with the other side of the fuse.
The fusable coating may be formed by coating a surface of the lead screw with a tin composition.
The fusible coating may include a trim pattern formed to adjust a fusing time caused by an overcurrent.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which:
FIG. 1A is a perspective view of a fuse-resistor assembly according to one embodiment of the invention;
FIG. 1B is a cross-sectional view of the fuse-resistor assembly shown in FIG. 1A taken along a longitudinal cross-sectional surface thereof (cross-section taken along A-A');
fig. 2 is a reference diagram illustrating detailed components of the first resistor or the second resistor;
FIG. 3 is a reference diagram illustrating a fuse coupled between a first resistor and a second resistor;
FIGS. 4A and 4B are reference diagrams illustrating a trim pattern formed on a fusible coating 304 of a fuse 300 according to the present invention;
FIG. 5 is a reference diagram illustrating one embodiment of comparing fusing times according to the number of cutting points;
FIG. 6 is a reference diagram illustrating one embodiment of comparing fusing times according to a dot shape in a cutting shape;
fig. 7 is a reference diagram illustrating another embodiment of comparing fusing times according to a line shape in a cutting shape.
FIG. 8 is a flow chart illustrating one embodiment of a method of manufacturing a fuse resistor assembly in accordance with the present invention;
FIG. 9 is a perspective view of a fuse-resistor assembly according to another embodiment of the invention;
fig. 10 is a sectional view illustrating the ceramic tube shown in fig. 9;
11A-11H are reference tables illustrating performance testing of a fuse-resistor assembly according to one embodiment of the invention; and
fig. 12 is a table comparing the results of the performance tests shown in fig. 11A to 11H.
Detailed Description
The scope of the present invention should not be construed as limited to the embodiments set forth herein, since the description of the present invention is intended only for purposes of structural and functional description. That is, since the embodiments may be variously changed and may have various shapes, the scope of the present invention should be understood to include equivalents capable of realizing the technical concept.
When it is stated that one element is "connected" to another element, it is to be understood that the one element may be directly connected to the other element, but that additional elements may be present therebetween. On the other hand, when it is stated that one element is "directly connected" to another element, it is understood that no other element exists therebetween.
Unless otherwise defined, terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Unless clearly defined in the present invention, terms defined in commonly used dictionaries should be interpreted as being consistent with the contextual meaning of the related art and should not be interpreted in an ideal or excessively written sense.
Fig. 1A is a perspective view illustrating a fuse resistor assembly 10 according to an embodiment of the present invention, and fig. 1B is a sectional view of the fuse resistor assembly shown in fig. 1A taken along a longitudinal sectional surface thereof (sectional surface a-a').
Referring to fig. 1A and 1B, the fuse-resistor assembly 10 includes a first resistor 100, a second resistor 200, a fuse 300, and a component protection cover 400.
The first resistor 100 includes a conductive resistor member and restrains an inrush current. In addition, the second resistor 200 also includes a conductive resistor part and restrains the inrush current.
Fig. 2 is a reference diagram illustrating detailed components of the first resistor 100 or the second resistor 200.
Referring to fig. 2, the first resistor 100 includes a first resistor rod 102, a first outer resistor cover 104, a first inner resistor cover 106, and a first resistance wire 108.
The first resistor rod 102 may be formed of a ceramic material and may include a cylindrical or prismatic shape.
A first external resistor cover 104 is coupled to one side of the first resistor bar 102. A first external resistor cover 104 may be inserted into and coupled with one end of the first resistor rod 102. The first external resistor cover 104 may be the following: which includes a one-way insertion groove G0 (e.g., a circular groove or an angular groove) formed only at one side so that one end of the first resistor rod 102 can be inserted therein. The first external resistor cover 104 may be formed of a conductive material.
Meanwhile, the first resistor lead 104-2 may be coupled with the other side of the first external resistor cover 104 (i.e., the outside of the cover). The first resistor lead 104-2 is a wire having electrical conductivity. The first resistor lead 104-2 may be connected to the first external resistor cap 104 using a method such as spot welding, laser welding, soldering, or the like.
A first internal resistor cover 106 may be inserted into and coupled with the other end of the first resistor rod 102. To this end, the first internal resistor cover 106 may have a bidirectional groove (e.g., a circular groove or an angular groove) structure and may include a first resistor insertion groove G1 and a first fuse insertion groove G2. The first resistor insertion groove G1 has a groove structure formed to be plug-coupled with the other side of the first resistor bar 102, and the first fuse insertion groove G2 has a groove structure formed to be plug-coupled with one side of the fuse 300. The first internal resistor cap 106 may be formed of a conductive material.
The first resistance wire 108 is a conductive wire that surrounds the first resistor rod 102 and connects the first outer resistor cover 104 with the first inner resistor cover 106. A first resistance wire 108 helically surrounds the surface of the first resistor rod 102 and connects the first outer resistor cover 104 with the first inner resistor cover 106. The first resistance line 108 includes a resistor member that generates heat due to an overcurrent. One end 108-1 of the first resistance line 108 is connected to one side of the first outer resistor cover 104, and the other end 108-2 of the first resistance line 108 is connected to one side of the first inner resistor cover 106.
Likewise, referring to fig. 2, the second resistor 200 includes a second resistor rod 202, a second outer resistor cover 204, a second inner resistor cover 206, and a second resistor wire 208.
The second resistor rod 202 may be formed of a ceramic material, including shapes such as a pillar shape, a prism shape, and the like.
The second external resistor cover 204 includes a cover structure coupled to one side of the second resistor rod 202.
The second internal resistor cover 206 includes a cover structure coupled to the other side of the second resistor rod 202. To this end, the second internal resistor cover 206 may include: a second resistor insertion groove G1' having a groove configured to allow one side of the second internal resistor cover to be plug-coupled with the other side of the second resistor rod 202; and a second fuse insertion groove G2' having a groove configured to allow the other side of the second internal resistor cover to be plug-coupled with the other side of the fuse 300.
A second resistance wire 208 surrounds the second resistor rod 202 and connects the second outer resistor cover 204 with the second inner resistor cover 206. The second resistance line 208 may have the same resistance value as that of the first resistance line 108, or may have a resistance value different from that of the first resistance line 108.
The second resistor rod 202 has the same or similar structure as the first resistor rod 102 of the first resistor 100, and the second external resistor cover 204 has the same or similar structure as the first external resistor cover 104. The second internal resistor cover 206 has the same or similar structure as the first internal resistor cover 106 of the first resistor 100, and the second resistance line 208 has the same or similar structure as the first resistance line 108 of the first resistor 100. Therefore, a detailed description of each component of the second resistor 200 will be omitted.
The fuse 300 is located between the first resistor 100 and the second resistor 200, electrically connects the first resistor 100 and the second resistor 200, and performs a function that the fusible body is disconnected by an overcurrent. That is, the fuse 300 has one side coupled with the first resistor 100 and the other side coupled with the second resistor 200, is connected in series with the first resistor 100 and the second resistor 200, and performs a function of breaking a circuit connection caused by heat or overcurrent.
Fig. 3 is a reference diagram illustrating a fuse 300 coupled between the first internal resistor cover 106 of the first resistor 100 and the second internal resistor cover 206 of the second resistor 200. Referring to fig. 3, one side of the fuse 300 may be inserted into and coupled with the first internal resistor cover 106 of the first resistor 100, and the other side of the fuse 300 may be inserted into and coupled with the second internal resistor cover 206 of the second resistor 200.
The fuse 300 may include a rod-type fuse rod 302 and a fusible coating 304 applied to a surface of the fuse rod 302 and fused by an overcurrent generated in the first and second resistors 100 and 200.
The fuse rod 302 may include a cylindrical or prismatic shape and may be formed of a ceramic material.
When the first resistor 100 or the second resistor 200 generates heat due to the application of an overvoltage or overcurrent, the fusible coating 304 is blown and cuts off the electrical connection due to the heat. The fusible coating 304 may be formed by coating the surface of the lead screw 302 with a tin composition. Also, the fusible coating 304 may be, for example, a fusible body including a low melting point metal or alloy having a melting point of 450 ℃ or less, for example, at least one element from the following: tin (Sn), silver (Ag), antimony (Sb), indium (In), bismuth (Bi), aluminum (Al), zinc (Zn), copper (Cu), and nickel (Ni), but is not limited thereto.
The fusible coating 304 includes a trim pattern formed to adjust a fusing time caused by an overcurrent. The trim pattern may be formed by laser cutting or diamond cutting. Here, the finishing pattern may be cut with one or more of different numbers of cutting points and cutting shapes. Here, the cutting shape may include a dot, a line, or a spiral shape, or may include a combination thereof.
Fig. 4A and 4B are reference diagrams illustrating a trim pattern formed on a fusible coating 304 of a fuse 300 according to the present invention. Fig. 4A illustrates a dot-shaped trim pattern, and fig. 4B illustrates a straight-line-shaped trim pattern.
Depending on the difference in the number of cutting points or the cutting shape, the trimming pattern may cause a difference in time of the fusing of the fusible coating 304 caused by the overcurrent. The difference in fusing time according to the trimming pattern of the fusible coating 304 will be described with reference to fig. 5 to 7.
Fig. 5 is a reference diagram illustrating one example of comparing fusing times according to the number of cut points, fig. 6 is a reference diagram illustrating one embodiment of comparing fusing times according to a point shape in a cut shape, and fig. 7 is a reference diagram illustrating another example of comparing fusing times according to a line shape in a cut shape.
Referring to fig. 5, it can be seen that the fusing time gradually decreases as the number of cutting points of the trimming pattern increases. Also, referring to fig. 6, it can be seen that as the cutting points in the cut shape of the finishing pattern increase in the longitudinal direction, the fusing time decreases. Also, referring to fig. 7, it can be seen that as the length of the straight line or the spiral line in the cut shape of the trimming pattern increases, the fusing time decreases. Accordingly, the blowing time of the fuse-resistor assembly 10 caused by an overcurrent can be adjusted by selecting the trimming pattern of the fusible coating 304 according to the design purpose.
The component protective cover 400 encloses the first resistor 100, the second resistor 200, and the fuse 300. The component protective cover 400 protects the surfaces of the first resistor 100, the second resistor 200, and the fuse 300. Also, the protection cover 400 serves as a cover configured to insulate the current flowing through the first resistor 100, the second resistor 200, and the fuse 300 from the outside.
FIG. 8 is a flow chart illustrating one embodiment of a method of manufacturing a fuse-resistor assembly in accordance with the present invention.
First, a first resistor and a second resistor (500) are formed that divide an applied current or voltage. Here, the first resistor may include: a first resistor rod; a first external resistor cap coupled to one side of the first resistor rod; a first internal resistor cap coupled to the other side of the first resistor rod; and a first resistance wire surrounding the first resistor rod and connecting the first outer resistor cover with the first inner resistor cover. Here, the first internal resistor cover may include: a first resistor insertion groove having a groove configured to allow one side of the first internal resistor cover to be insertion-coupled with the other side of the first resistor rod; and a first fuse insertion groove having a groove configured to allow the other side of the first internal resistor cover to be insertedly coupled with one side of a fuse. Likewise, the second resistor may include: a second resistor rod; a second external resistor cap coupled to one side of the second resistor rod; a second internal resistor cap coupled to the other side of the second resistor rod; and a second resistance wire surrounding the second resistor rod and connecting the second outer resistor cover with the second inner resistor cover. Here, the second internal resistor cover may include: a second resistor insertion groove having a groove configured to allow one side of the second internal resistor cover to be insertion-coupled with the other side of the second resistor rod; and a second fuse insertion slot having a slot configured to allow the other side of the second internal resistor cover to be insertedly coupled with the other side of the fuse.
The process of forming the first resistor will be described below. The first external resistor cap and the first internal resistor cap are coupled with both ends of the first resistor rod, and then the first resistor lead is coupled with one side of the first external resistor cap. Then, the first resistance wire is made to surround the first resistor rod and the first outer resistor cover is connected with the first inner resistor cover. The process of forming the second resistor is the same as the process of forming the first resistor.
After operation 500, a fuse is connected in series between a first resistor and a second resistor (502), the fuse blown by an overcurrent generated at the first resistor and the second resistor. The fuse may be a rod-shaped fusible link comprising a low melting point metal or alloy, for example, at least one element from the group consisting of: sn, Ag, Sb, In, Bi, Al, Zn, Cu and Ni. The fuse may include a ceramic tube, terminals formed at both ends of the ceramic tube, and fusible body wires inserted into the ceramic tube. One side of the fuse may be plug-coupled with a first fuse insertion groove of the first resistor to be connected in series with the first fuse insertion groove, and the other side of the fuse may be plug-coupled with a second fuse insertion groove of the second resistor to be connected in series with the second fuse insertion groove.
The fuse may be formed by coating a rod-shaped fuse wire with a coating that can be fused by an overcurrent. The fusible coating includes a trimming pattern formed to adjust a fusing time caused by an overcurrent and may be cut with one or more of different numbers of cutting points and cutting shapes.
After operation S502, the first resistor, the second resistor, and the fuse are enclosed with a component protective cover (504). The component protection cap performs an insulating function on the current flowing through the first resistor, the second resistor and the fuse.
Fig. 9 is a perspective view of a fuse-resistor assembly according to another embodiment of the present invention, and fig. 10 is a sectional view illustrating a ceramic tube shown in fig. 9.
The fuse-resistor assembly includes: a first resistor and a second resistor that divide the applied current or voltage; a fuse located between the first resistor and the second resistor and including one side coupled with the first resistor and the other side coupled with the second resistor so as to be connected in series with the first resistor and the second resistor; and a ceramic tube including a receiving space into which the first resistor, the second resistor, and the fuse may be inserted.
Here, an opening portion is formed in one side of the ceramic tube to allow the first resistor, the second resistor, and the fuse to be inserted therein, and the other side of the ceramic tube is completely closed, while a hollow portion is formed at the center thereof such that the first lead wire connected to the first resistor passes therethrough.
In the ceramic tube, in order to secure an air buffer area, the first resistor, the second resistor, and the fuse are spaced apart from an inner circumferential surface forming the receiving space by a certain distance or more, and the opening portion and the hollow portion are molded to seal the receiving space from the outside.
In the ceramic tube, the opening portion and the hollow portion are molded using an epoxy resin material.
The fuse-resistor assembly 10 has the following structure: in this structure, a fuse corresponding to a fusible body is located between the resistors to be connected in series with the two winding resistors. The performance of the fuse resistor assembly 10 according to the present invention can be known by testing thermal/electrical properties such as reflow, surge, local short circuit, etc.
Fig. 11A to 11H are reference tables illustrating performance tests of fuse resistor assemblies according to an embodiment of the present invention, and fig. 12 is a table comparing results of the performance tests shown in fig. 11A to 11H.
Referring to fig. 11A to 11H and fig. 12, the fuse-resistor assembly 10 according to the present invention is injection-molded using materials such as thermoplastic resin and thermosetting resin, so that it is possible to provide durability of the fusible body against external heat while performing a reflow process.
Also, according to the present invention, the fusible link is located more inside than the existing injection molded product, so that the influence related to heat inflow from the outside (heat inflow through the reflow wire) can be minimized. Also, due to a heat sink effect caused by the ceramic rods of the first and second resistors disposed at both sides of the fuse, heat near the fuse is mainly cut off by the first and second resistors, so that the influence of external heat can be minimized.
Also, since the fuse is located between the first resistor and the second resistor, so that the fuse is heated by the first resistor and the second resistor during operation, the fusing time can be reduced compared to the conventional case where only one resistor is provided.
Also, since the size of the resistor can be minimized, the surge performance can be enhanced while the first and second resistors 100 and 200 are wired.
According to the embodiments of the present invention, since the fuse is connected to the resistors while being connected between the two resistors, radiant heat generated at the resistors is efficiently transferred to the fuse, so that the fusing performance of the fuse can sensitively react according to an overcurrent flowing through the resistors. Therefore, the circuit element can be appropriately protected from a load caused by an overcurrent.
In particular, according to the present invention, a fuse including a fuse wire coated with a fusible body is connected in series between resistors, so that the durability of the fuse-resistor assembly can be increased. Accordingly, damage to the fuse-resistor assembly can be minimized despite external impact, and at the same time, the performance of the fuse to be blown by overcurrent can be accurately achieved according to the trimming pattern.
Although the exemplary embodiments of the present invention have been described above and illustrated in the accompanying drawings, the present invention is not limited to the specific embodiments described above, and various modifications may be made by those skilled in the art without departing from the essence of the present invention claimed by the claims, and these modifications should not be construed as being separated from the technical concept or prospect of the present invention.
Claims (9)
1. A fuse-resistor assembly comprising:
a first resistor and a second resistor that divide the applied current or voltage;
a fuse located between the first resistor and the second resistor and having one side coupled with the first resistor and the other side coupled with the second resistor to be connected in series with the first resistor and the second resistor; and
a ceramic tube having an accommodation space into which the first resistor, the second resistor, and the fuse are insertable,
wherein an opening portion is formed in one side of the ceramic tube to allow the first resistor, the second resistor and the fuse to be inserted into the ceramic tube, and the other side of the ceramic tube is completely closed while a hollow portion is formed at the center to allow a first lead wire connected to the first resistor to pass therethrough.
2. The fuse-resistor assembly according to claim 1, wherein in the ceramic tube, in order to secure an air buffer area, the first resistor, the second resistor, and the fuse are spaced apart from an inner circumferential surface forming the receiving space by a distance or more, and the opening portion and the hollow portion are molded to seal the receiving space from an outside.
3. The fuse-resistor assembly of claim 2 wherein in said ceramic tube, said open portion and said hollow portion are molded using an epoxy material.
4. The fuse-resistor assembly of claim 1 wherein the fuse comprises:
a rod-shaped safety screw rod; and
a fusible coating applied to a surface of the fuse rod and fused by an overcurrent generated at the first and second resistors.
5. The fuse-resistor assembly of claim 1 wherein the first resistor comprises:
a first resistor rod;
a first external resistor cap coupled to one side of the first resistor rod;
a first internal resistor cap coupled to the other side of the first resistor rod; and
a first resistance wire configured to enclose the first resistor rod and connect the first outer resistor cover with the first inner resistor cover, and
wherein the second resistor includes:
a second resistor rod;
a second outer resistor cap coupled with one side of the second resistor rod;
a second internal resistor cap coupled to the other side of the second resistor rod; and
a second resistance wire configured to enclose the second resistor rod and connect the second outer resistor cover with the second inner resistor cover.
6. The fuse-resistor assembly of claim 5 wherein the first internal resistor cover comprises:
a first resistor insertion slot having a slot configured to allow one side of the first internal resistor cover to be insertion-coupled with the other side of the first resistor rod; and
a first fuse insertion groove having a groove configured to allow the other side of the first internal resistor cover to be insertion-coupled with one side of the fuse.
7. The fuse-resistor assembly of claim 5 wherein the second internal resistor cover comprises:
a second resistor insertion slot having a slot configured to allow one side of the second internal resistor cover to be insertion-coupled with the other side of the second resistor rod; and
a second fuse insertion slot having a slot configured to allow the other side of the second internal resistor cover to be plug-in coupled with the other side of the fuse.
8. The fuse-resistor assembly of claim 4 wherein said fusible coating is formed by coating a surface of said fuse rod with a tin composition.
9. The fuse-resistor assembly of claim 4 wherein said fusible coating comprises a trim pattern formed to adjust a fusing time caused by said overcurrent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020190086314A KR102392382B1 (en) | 2019-07-17 | 2019-07-17 | Fuse resistor assembly and method for manufacturing fuse resistor assembly |
| KR10-2019-0086314 | 2019-07-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112242219A true CN112242219A (en) | 2021-01-19 |
Family
ID=74168205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911030249.6A Pending CN112242219A (en) | 2019-07-17 | 2019-10-28 | Fuse-resistor assembly and method of manufacturing a fuse-resistor assembly |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6934681B2 (en) |
| KR (1) | KR102392382B1 (en) |
| CN (1) | CN112242219A (en) |
| TW (1) | TWI727473B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10112404A (en) * | 1996-10-07 | 1998-04-28 | Matsushita Electric Ind Co Ltd | Resistor |
| JP2008097943A (en) * | 2006-10-11 | 2008-04-24 | Uchihashi Estec Co Ltd | Temperature fuse built-in resistor |
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2019
- 2019-07-17 KR KR1020190086314A patent/KR102392382B1/en active IP Right Grant
- 2019-10-21 JP JP2019192094A patent/JP6934681B2/en active Active
- 2019-10-23 TW TW108138257A patent/TWI727473B/en active
- 2019-10-28 CN CN201911030249.6A patent/CN112242219A/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2021018975A (en) | 2021-02-15 |
| TW202105420A (en) | 2021-02-01 |
| JP6934681B2 (en) | 2021-09-15 |
| TWI727473B (en) | 2021-05-11 |
| KR102392382B1 (en) | 2022-04-29 |
| KR20210009598A (en) | 2021-01-27 |
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