CN108140508A - Fuse element - Google Patents

Fuse element Download PDF

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Publication number
CN108140508A
CN108140508A CN201680060187.1A CN201680060187A CN108140508A CN 108140508 A CN108140508 A CN 108140508A CN 201680060187 A CN201680060187 A CN 201680060187A CN 108140508 A CN108140508 A CN 108140508A
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CN
China
Prior art keywords
electrode
electric conductor
melting
low
point metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201680060187.1A
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Chinese (zh)
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CN108140508B (en
Inventor
川津雅巳
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Dexerials Corp
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Dexerials Corp
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Filing date
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Publication of CN108140508A publication Critical patent/CN108140508A/en
Application granted granted Critical
Publication of CN108140508B publication Critical patent/CN108140508B/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • 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
    • H01H85/06—Fusible members characterised by the fusible material
    • 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
    • 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
    • H01H85/12—Two or more separate fusible members in parallel
    • 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
    • H01H85/36—Means for applying mechanical tension to fusible member

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Fuses (AREA)

Abstract

It provides by simply constructing the small-sized fuse element to correspond to high current.Fuse element 1 has：Insulated substrate 2；The 1st electrode 3, the 2nd electrode 4 on the surface 2a of insulated substrate 2 is configured；And via low-melting-point metal 5 and with the 1st electrode 3, the electric conductor 6 that the 2nd electrode 4 is connect respectively and fusing point is higher than low-melting-point metal 5, electric conductor 6 is moved to by the fusing of low-melting-point metal 5 and blocks the electrical path between the 1st electrode 3, the 2nd electrode 4 at least one detach among the 1st electrode 3, the 2nd electrode 4.

Description

Fuse element
Technical field
The present invention relates to the fuse elements that the current path is blocked on current path and when flowing through both constant currents. The application using in Japanese publication Patent 2015-211340 filed in 27 days October in 2015 of Japan as basic claims priority Power, this application are introduced into the application by referenced.
Background technology
All the time, it fused using the built-in spontaneous heating when the electric current of overrate flows through, block the electric current road The fuse cell of diameter（fuse element）Fuse element.As fuse element, use more and scolding tin is for example enclosed in glass The electrode holder fixed fuse of pipe has printed the patch fuse of Ag electrodes in ceramic base plate surface, has made a part for copper electrode Attenuate and be packed into plastic shell be screwed or insert type fuse element etc..
Above-mentioned existing fuse element is difficult to install using the surface of reflux, and the efficiency of component installation is lower, therefore The fuse element for the surface installing type recorded such as patent document 1 is developed in recent years.
The fuse element for the surface installing type that patent document 1 is recorded, in addition to having as general electric current fuse because of mistake Electric current and except the function cut off, also have heater to be powered and heated by using external circuit the hand of fuse cell Method, the control based on electric circuit side can be as the specialities of the usage of switch by the timing fusing fuse cell intended.
Such fuse element is mainly as the overcharge for the battery pack for using lithium rechargeable battery or the guarantor of overcurrent Protection element and use.Lithium rechargeable battery is used in the mobile equipment of laptop, portable phone, smart phone etc. In, in recent years in electric tool, electric bicycle, battery-operated motor cycle（bike）And it is also used in electric vehicle etc..Therefore electricity The capacity of pond group becomes larger, and also becomes larger year by year for the rated current required by fuse element.
In addition, in the fuse cell of patent document 1, in order to correspond to high current, using stacking low-melting-point metal layer and height The unit of melting point metal layer, low-melting-point metal layer corrode high melting point metal layer and improve fusing speed, and can corresponding high current It is unrelated and ensure quick-break.
Existing technical literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2013-229293 bulletins.
Invention content
The subject that the invention solves
About existing fuse element, this problem point is had been pointed out：The situation of high current is corresponded in raising current rating Under, if fuse cell promotes current rating due to enlargement, the volume for the fuse cell that must be fused can be increased, so as to speed Disconnected property is poor.
If being illustrated in more details, in order to increase rated current, need reduce fuse element resistance value, therefore compared with The earth obtains the sectional area of fuse cell, can also become larger so as to the size of fuse element entirety.
In addition, the drawbacks of as the sectional area for increasing fuse cell, then be after being melted by the fever of heater etc. The volume of melting unit also becomes larger, and can not accommodate melting unit on the electrode, it is also possible to it is incomplete not circuitry cuts occur It is good.
In order to accommodate on the electrode because heater when fever due to the melting unit that melts, electrode size can only be increased, still The enlargement of fuse element can so be incurred.
In addition, in the fuse element recorded in patent document 1, there are such subjects：By be laminated low-melting-point metal layer and High melting point metal layer minimizes fuse cell to reach, and ensures quick-break, still, because in fuse cell using special Construction, so manufacturing process is complicated, and be difficult to inexpensively manufacture.
Therefore, the purpose of the present invention is to provide by simply constructing the small-sized fuse element to correspond to high current.
Solution for solving the problem
In order to solve the above problems, fuse element according to the present invention has：Insulated substrate；Configuration is more on insulated substrate A electrode；And connect respectively via low-melting-point metal and with multiple electrodes and electric conductor that fusing point is higher than low-melting-point metal, it leads Electric body by the fusing of low-melting-point metal, be moved to at least one detach among multiple electrodes and block arbitrary interelectrode logical Power path.
Invention effect
According to the present invention, the circuitry cuts of fuse element are not to be carried out because of the fusing of fuse cell, work as connection electrode When being melted with the low-melting-point metal of electric conductor, make electric conductor mobile by the surface tension of the low-melting-point metal melted can cut The electrical path of interpolar is powered off, there is no need to melt to be equivalent to the electric conductor of fuse cell, and uses high-melting-point and simple structure Cheap electric conductor, the miniaturization of fuse element can be reached.
Description of the drawings
[Fig. 1] Fig. 1 is the plan view of the 1st for showing to be applicable in the fuse element of the present invention.
[Fig. 2] Fig. 2 is the sectional view of the 1st for showing to be applicable in the fuse element of the present invention.
[Fig. 3] Fig. 3 is the plan view of the 1st for showing to be applicable in the fuse element of the present invention, and shows that fuse element acts State afterwards.
[Fig. 4] Fig. 4 is the circuit diagram for the circuit structure of the 1st that explanation is applicable in fuse element of the invention, Fig. 4（A）Show Go out the state before the action of fuse element, Fig. 4（B）State after the action of fuse element is shown.
[Fig. 5] Fig. 5 is the sectional view for showing to be applicable in the variation of the fuse element of the present invention.
[Fig. 6] Fig. 6 is the sectional view for showing to be applicable in another variation of the fuse element of the present invention.
[Fig. 7] Fig. 7 is the sectional view for showing to be applicable in another variation of the fuse element of the present invention.
[Fig. 8] Fig. 8 is the plan view for showing to be applicable in another variation of the fuse element of the present invention.
[Fig. 9] Fig. 9 is the plan view for showing to be applicable in another variation of the fuse element of the present invention.
[Figure 10] Figure 10 is the plan view of the 2nd for showing to be applicable in the fuse element of the present invention.
[Figure 11] Figure 11 is the sectional view of the 2nd for showing to be applicable in the fuse element of the present invention.
[Figure 12] Figure 12 is the plan view of the 2nd for showing to be applicable in the fuse element of the present invention, and shows that fuse element moves State after work.
[Figure 13] Figure 13 is the circuit diagram for the circuit structure of the 2nd that explanation is applicable in fuse element of the invention, Figure 13（A） State before the action of fuse element, Figure 13 are shown（B）State after the action of fuse element is shown.
[Figure 14] Figure 14 is the sectional view for showing to be applicable in the variation of the fuse element of the present invention.
[Figure 15] Figure 15 is the sectional view for showing to be applicable in another variation of the fuse element of the present invention.
[Figure 16] Figure 16 is the sectional view for showing to be applicable in another variation of the fuse element of the present invention.
[Figure 17] Figure 17 is the plan view for showing to be applicable in another variation of the fuse element of the present invention.
[Figure 18] Figure 18 is the plan view for showing to be applicable in another variation of the fuse element of the present invention.
[Figure 19] Figure 19 is the plan view for showing to be applicable in another variation of the fuse element of the present invention.
[Figure 20] Figure 20 is the plan view of the 3rd for showing to be applicable in the fuse element of the present invention.
[Figure 21] Figure 21 is the sectional view of the 3rd for showing to be applicable in the fuse element of the present invention.
[Figure 22] Figure 22 is the plan view of the 3rd for showing to be applicable in the fuse element of the present invention, and shows that fuse element moves State after work.
[Figure 23] Figure 23 is the circuit diagram for the circuit structure of the 3rd that explanation is applicable in fuse element of the invention, Figure 23（A） State before the action of fuse element, Figure 23 are shown（B）State after the action of fuse element is shown.
[Figure 24] Figure 24 is the sectional view for showing to be applicable in the variation of the fuse element of the present invention.
[Figure 25] Figure 25 is the plan view for showing to be applicable in another variation of the fuse element of the present invention.
[Figure 26] Figure 26 is the sectional view for showing to be applicable in another variation of the fuse element of the present invention.
[Figure 27] Figure 27 is the plan view for showing to be applicable in another variation of the fuse element of the present invention.
[Figure 28] Figure 28 is to show to be applicable in the figure of the variation of electric conductor that the fuse element of the present invention has.
Specific embodiment
Hereinafter, the fuse element for being applicable in the present invention is described in detail on one side with reference to attached drawing on one side.In addition, this hair It is bright to be not limited only to following embodiment, various changes obviously can be carried out without departing from the gist of the present invention.Separately Outside, attached drawing is schematical, there is a situation where that ratio of each size etc. is different from reality.About specific size etc., should pour It drinks the following description and is judged.In addition, attached drawing is obviously also different comprising mutual size relationship or ratio between each other Part.
[the 1st embodiment]
[fuse element]
As shown in Figure 1 to Figure 3, fuse element 1 according to the present invention has：Insulated substrate 2；Configuration is on insulated substrate 2 Multiple electrodes 3,4（Hereinafter, it is recorded as the 1st electrode 3 and the 2nd electrode 4.）；Via low-melting-point metal 5 respectively with the 1st electrode 3 and The electric conductor 6 that 2 electrodes 4 connect and fusing point is higher than low-melting-point metal 5.
In addition, Fig. 1 and Fig. 3 be perspective electric conductor 6 and from the plan view that the top of fuse element 1 is watched, it is shown in dotted line Electric conductor 6.Fig. 2 is the sectional view on the A-A ' lines of Fig. 1.
Insulated substrate 2 is substantially rectangular shape, such as exhausted by having for aluminium oxide, glass ceramics, mullite, zirconium oxide etc. The component of edge is formed as square shape.In addition, insulated substrate 2 can also use being used for for glass epoxy substrate, phenol substrate etc. The material of printed circuit board.
The 1st electrode 3 and the 2nd electrode 4 are formed at the opposite both ends of insulated substrate 2.1st electrode 3 and the 2nd electrode 4 are formed respectively by the conductive pattern of Cu or Ag wirings etc., in the case of the wiring material easily aoxidized in Cu etc., as anti- Countermeasure is aoxidized, the protective layer of Ni/Au coating or Sn coating etc. is suitably set on surface.In addition, the 1st electrode 3 and the 2nd electrode 4 From the surface 2a of insulated substrate 2 via side to back side 2b.Fuse element 1 is through the formation of the 1st electrode 3 and the 2nd of back side 2b Electrode 4 is surface mounted on the current path of circuit board (not shown).
Low-melting-point metal 5 is the connecting material of electric conductivity that electric conductor 6 is ridden over the 1st electrode 3 and the 2nd electrode 4 and is connected, For example, the metal using Sn as principal component can be used as solder cream.It is the material of commonly referred to as " Pb-free solder ".Low melting point The fusing point of metal 5 is set as the temperature degree of reflow ovens.
Electric conductor 6 with low-melting-point metal 5 by being comparably high-melting-point, low-resistance conductive material is formed, such as Fig. 1 to Fig. 3 It is shown, it rides over the 1st electrode 3 and the 2nd electrode 4 and is configured, be the component of substantially rectangular shape and plate.In addition, the not office of electric conductor 6 It is limited to rectangular-shaped, plate, but uses the shape in present embodiment from the viewpoint of easy to process.
Specifically, 6 preferred high-melting-point of electric conductor, low-resistance metal material, can use Ag, Au, Al, Cu, Cu to close Gold etc..Electric conductor 6 is preferably closed using the Cu or Cu that cheap and be unable to autoxidation envelope and easily connected by low-melting-point metal Gold.In addition, electric conductor 6 forms the electrical path between the 1st electrode 3 and the 2nd electrode 4, it can't be because of the electricity of overrate Flow spontaneous heating（Joule heat）And it fuses.But electric conductor 6 is not obviously interfered and is fused using spontaneous heating.
Electric conductor 6 is higher with that will not be melted in the case of being installed on insulated substrate 2 by reflow ovens Fusing point.This is because the installation of electric conductor 6 is difficult to if being melted in reflux temperature.
Fuse element 1 is used to implement small-sized and high rating electrical, for example, on one side as the compact in size to 3 of insulated substrate 2 ~4mm × 5~6mm or so can seek high specifiedization of resistance value to 0.5~1m Ω, 50~60A rated values on one side.In addition, this hair It significantly can so be suitable for the fuse element for having all sizes, resistance value and current rating.
[action of fuse element]
About fuse element 1 because the fusing of low-melting-point metal 5 and electric conductor 6 slides shifting on the surface 2a of insulated substrate 2 It is dynamic, until from least one separation among the 1st electrode 3 and the 2nd electrode 4, so as to block between the 1st electrode 3 and the 2nd electrode 4 Electrical path.
Electric conductor 6 utilizes low-melting-point metal 5 for each of the 1st electrode 3 and the 2nd electrode 4 with different connection areas Connection.Thus, because of the fusing of low-melting-point metal 5, electric conductor 6 because of different tension to be drawn to the electricity of the 1st electrode the 3 or the 2nd The mode of the larger side of connection area of pole 4 slides movement on the surface 2a of insulated substrate 2.
Specifically, as shown in Figure 1 to Figure 3, in fuse element 1, so that the low-melting-point metal 5b on the 2nd electrode 4 is opposite It is more than modes of the low-melting-point metal 5a on the 1st electrode 3 relative to the connection area of electric conductor 6 in the connection area of electric conductor 6 It forms.Thus, electric conductor 6 because low-melting-point metal 5 fusing and by into 4 side of the 2nd electrode, figure arrow direction draw, exhausted Movement is slided on the surface 2a of edge substrate 2, as shown in figure 3, being kept on the 2nd electrode 4 by low-melting-point metal 5b.
In addition, as shown in Figures 1 and 2, electric conductor 6 than the 1st electrode 3 to 4 side of the 2nd electrode more to deviate（offset）Shape State by low-melting-point metal 5a, 5b is connected and is maintained at the 1st electrode 3 and the 2nd electrode 4 respectively.
Specifically, electric conductor 6 as shown in Fig. 1, is setting the 1st electrode 3 and the part of the repetition of electric conductor 6 Length is L1, the 2nd electrode 4 not with electric conductor 6 repeat part the 2nd electrode 4 length L2When, to become L1＜ L2Mode, The state deviated to 4 side of the 2nd electrode assembles.
If it this is because cannot ensure electric conductor 6 with the 1st electrode 3 matched length L of contact portions1Above Amount of movement cannot completely cut through being electrically connected for electric conductor 6 and the 1st electrode 3.In other words, the movement of the electric conductor 6 of conveying is slided Amount, the length L dependent on the 2nd electrode 4 not repeated with electric conductor 62, it can be said that needing L2It is ensured to be L1More than.
Then, using circuit diagram, the action of fuse element 1 is illustrated.Such as Fig. 4（A）It is shown, in fuse element 1, lead Electric body 6 is connect with the 1st electrode 3 and the 2nd electrode 4, so as to make to be connected between the 1st electrode 3 and the 2nd electrode 4.Moreover, such as Fig. 4（B）Institute Show, when fuse element 1 is melted when low-melting-point metal 5 is because the warm from outside, electric conductor 6 is made to be moved to 4 Slideslip of the 2nd electrode Dynamic, electric conductor 6 is detached from the 1st electrode 3, so as to cut off the conducting of the 1st electrode 3 and the 2nd electrode 4.
[variation 1]
Then, as another example in the 1st embodiment, variation 1 is illustrated.In the fuse element with above description 1 equal position marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 5, the fuse element 1 involved by variation 1 has on the surface 2a of insulated substrate 2 in the 1st electrode The supporting member 7 of electric conductor 6 is supported between 3 and the 2nd electrode 4.In addition, Fig. 5 is comparable to the sectional view of the A-A ' lines in Fig. 1. Supporting member 7 is configured between the 1st electrode 3 and the 2nd electrode 4, in order to avoid interelectrode short circuit, preferably by insulating materials structure Into or be carried out insulation coating（coating）Component.
Supporting member 7 can slidably and movingly support electric conductor 6, and be fixed on the surface 2a of insulated substrate 2.That is, branch Support component 7 and electric conductor 6 are simultaneously unlocked, and the shape as made the skidding of electric conductor 6 or coating are formd on supporting member 7.
If low-melting-point metal 5 melts electric conductor 6 receive the support of supporting member 7 simultaneously can be along level smoothly to the 2nd 4 Slideslip of electrode moves.That is, in the midway that low-melting-point metal 5 is moved to 4 Slideslip of the 2nd electrode, electric conductor 6 is in the 2nd electricity Low-melting-point metal 5b on pole 4 stretches out the state of cantilever, it is therefore envisaged that electric conductor 6 can be on the surface 2a of insulated substrate 2 It tilts and cannot suitably carry out slip movement.Therefore, supporting member 7 is by keeping the horizontality of electric conductor 6, can support be Slip movement can suitably be carried out.
[variation 2]
Then, as another example in the 1st embodiment, variation 2 is illustrated.In the fuse element with above description 1 equal position marks identical label and omits the description, and difference section is especially illustrated.
As shown in fig. 6, the fuse element 1 involved by variation 2 has the 1st electricity of protection on the surface 2a of insulated substrate 2 The The lid component 8 of pole 3, the 2nd electrode 4, low-melting-point metal 5, electric conductor 6 etc..In addition, Fig. 6 is comparable to the A-A ' lines in Fig. 1 Sectional view.
The lid component 8 is equipped with the mobile specified part 8a in the movable area of regulation electric conductor 6, and having makes electric conductor 6 will not be to set Mobile such braking other than direction（stopper）Function.The The lid component 8 can use such as thermoplastic, ceramics, glass The component with insulating properties of epoxy substrate etc. is formed.
In The lid component 8, mobile specified part 8a is extended to and 6 identical height of electric conductor, shifting on the surface 2a of insulated substrate 2 Dynamic specified part 8a is arranged on the position that given clearance is kept from the initial position of electric conductor 6 to 3 side of the 1st electrode.That is, mobile regulation Portion 8a and electric conductor 6 are not contacted in the initial position of electric conductor 6, but low-melting-point metal 5 fusing in the state of electric conductor 6 because Movement specified part 8a and electric conductor 6 contact when hitting when and can be moved to 3 side of the 1st electrode, make electric conductor 6 will not be to the side of mistake It is moved to sliding.
Even if in a state that mobile specified part 8a provides the movement of electric conductor 6, if the conduction of low-melting-point metal 5b sides The connection area of body 6 is larger, then after all because the tension of low-melting-point metal 5b and electric conductor 6 can to 4 side-lining of the 2nd electrode, from And electric conductor 6 is also moved to 4 Slideslip of the 2nd electrode.
Therefore, mobile specified part 8a prevents electric conductor 6 to be moved to the 1st by providing the movement of electric conductor 6 round about 3 side of electrode, and can reliably be moved to 4 Slideslip of the 2nd electrode.
[variation 3]
Then, as another example in the 1st embodiment, variation 3 is illustrated.In the fuse element with above description 1 equal position marks identical label and omits the description, and difference section is especially illustrated.
As shown in fig. 7, the fuse element 1 involved by variation 3 has regulation electric conductor on the surface 2a of insulated substrate 2 The mobile regulation component 9 of 6 movement.In addition, Fig. 7 is comparable to the sectional view of the A-A ' lines in Fig. 1.
Mobile regulation component 9 is integrally fixed on the surface 2a of insulated substrate 2, and the 1st electricity is especially integrally fixed in this structure Component on pole 3, having makes electric conductor 6 will not be to braking function as movement other than set direction.Mobile regulation component 9 Insulator can such as be used, but short circuit etc. will not be led to the problem of on circuit structure, thus with the 1st electrode 3 integrally In the case of manufacture, it can also use and 3 same metal material of the 1st electrode.
Mobile regulation component 9 extends to and 6 identical height of electric conductor, mobile regulation structure on the surface 2a of insulated substrate 2 Part 9 is arranged on the position that given clearance is kept from the initial position of electric conductor 6 to 3 side of the 1st electrode.That is, mobile regulation 9 He of component Electric conductor 6 is not contacted in the initial position of electric conductor 6, but electric conductor 6 is because of shock etc. in the state of the fusing of low-melting-point metal 5 And movement regulation component 9 and electric conductor 6 contact when can be moved to 3 side of the 1st electrode, and electric conductor 6 is made not slided to the direction of mistake Dynamic movement.
Even if in a state that mobile regulation component 9 provides the movement of electric conductor 6, if the conduction of low-melting-point metal 5b sides The connection area of body 6 is larger, then after all because the tension of low-melting-point metal 5b and electric conductor 6 can to 4 side-lining of the 2nd electrode, from And electric conductor 6 is also moved to 4 Slideslip of the 2nd electrode.
Therefore, mobile regulation component 9 is by providing the movement of electric conductor 6 round about, and electric conductor 6 is prevented to be moved to the 1 electrode, 3 side, and can reliably be moved to 4 Slideslip of the 2nd electrode.
[variation 4]
Then, as another example in the 1st embodiment, variation 4 is illustrated.In the fuse element with above description 1 equal position marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 8, the fuse element 1 involved by variation 4 has guiding electric conductor on the surface 2a of insulated substrate 2 The guide part 10 of 6 movement.In addition, Fig. 8 is the plan view had an X-rayed electric conductor 6 and watched from the top of fuse element 1, with dotted line Electric conductor 6 is shown.
Ways 10 is integrally fixed at the component on the surface 2a of insulated substrate 2, and having makes electric conductor 6 be moved along set direction The dynamic guide function along moving direction.Ways 10 is preferably parallel by extending from 3 lateral 2nd electrode, 4 side of the 1st electrode Two components form, and using the insulator of resin material etc. so that will not short circuit between two electrodes.
Ways 10 extends on the surface 2a of insulated substrate 2 to be set with 6 identical height of electric conductor, ways 10 In the position as guide rail for providing moving direction from side from initial position to the range that 4 side of the 2nd electrode is moved to electric conductor 6 It puts.That is, ways 10 and electric conductor 6 are contacted from the initial position of electric conductor 6 in side, melted until low-melting-point metal 5 Until electric conductor 6 is moved to 4 side of the 2nd electrode under state, electric conductor 6 is made not slided along the direction of mistake and is moved.
Therefore, ways 10 is by that can tilt electric conductor 6 or movement along inclined direction provides so that lead Electric body 6 can be moved reliably to 4 Slideslip of the 2nd electrode.
[variation 5]
Then, as another example in the 1st embodiment, variation 5 is illustrated.In the fuse element with above description 1 equal position marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 9, the fuse element 1 involved by variation 5 is so that the shape of electric conductor 6 is formed for trapezoidal shape.This Outside, Fig. 9 is to have an X-rayed electric conductor 6 and the plan view watched from the top of fuse element 1, electric conductor 6 shown in dotted line.
Electric conductor 6 is set as rectangular-shaped in above-mentioned another example, but with using 3 side of the 1st electrode as short side upper bottom, with Construction of 2nd electrode, 4 side for the trapezoidal shape of the bottom of long side.That is area of the electric conductor 6 in 3 side of the 1st electrode becomes smaller, and relatively exists The area of 2nd electrode, 4 side becomes larger.Therefore, 6 and the 1st electrode 3 of electric conductor and the 2nd electrode 4 are formed using low-melting-point metal 5 Connection area, 4 side of the 2nd electrode can be more than 3 side of the 1st electrode, and the drawing force that the low-melting-point metal 5b of fusing is brought becomes larger.
Therefore, fuse element 1, which becomes, can be such that the electric conductor 6 of trapezoidal shape is reliably moved to 4 Slideslip of the 2nd electrode.
Each variation in 1st embodiment described above, can arbitrarily combine and use, in order to be coordinated Effect, it is clear that can appropriately combined use.That is, it can be said that by being applicable in all each variations, can be melted in low-melting-point metal 5 When electric conductor 6 is made reliably to move, and the electrical connection being assuredly shut off between the 1st electrode 3 and the 2nd electrode 4.
[the 2nd embodiment]
[fuse element]
Another embodiment of fuse element 1 according to the present invention is illustrated.In addition, for having with implementing the 1st The structure for the equal function in part that mode illustrates marks identical label and omits the description.
As shown in Figure 10 to Figure 12, fuse element 1 according to the present invention has：Insulated substrate 2；Configuration is in insulated substrate Multiple electrodes 3,4,11 on 2（Hereinafter, it is recorded as the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11.）；Via low-melting-point metal 5 Respectively with the 1st electrode 3, the 2nd electrode 4, the electric conductor 6 that the 3rd electrode 11 is connect and fusing point is higher than low-melting-point metal 5；And match Put the heater 12 in the lower section of the 2nd electrode 4.
In addition, Figure 10 and Figure 12 are the plan views had an X-rayed electric conductor 6 and watched from the top of fuse element 1, shown with dotted line Go out electric conductor 6.Figure 11 is the sectional view on the B-B ' lines of Figure 10.
Insulated substrate 2 is substantially rectangular shape, such as exhausted by having for aluminium oxide, glass ceramics, mullite, zirconium oxide etc. The component of edge is formed as square shape.In addition, insulated substrate 2 can also use being used for for glass epoxy substrate, phenol substrate etc. The material of printed circuit board.
In the one end of insulated substrate 2, the 1st electrode 3 and the 3rd electrode 11 are formed with across both set a distances.In addition, insulating The other end of substrate 2, particularly the end abutted with being provided with the one end of the 1st electrode 3 and the 3rd electrode 11, are formed with the 2nd Electrode 4.About the 2nd electrode 4, it is extended in a manner of opposed with the 1st electrode 3 and the 3rd electrode 11, in the table of insulated substrate 2 On the 2a of face, it is configured in a manner of making the 1st electrode 3 and the 3rd electrode 11 and the 2nd electrode 4 opposed.
1st electrode 3, the 2nd electrode 4, the 3rd electrode 11 are formed respectively by the conductive pattern of Cu or Ag wirings etc., in Cu In the case of Deng the wiring material easily aoxidized, as anti-oxidation countermeasure, Ni/Au coating or Sn coating suitably are set on surface Deng protective layer.In addition, the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11 from the surface 2a of insulated substrate 2 via side to the back side 2b.Fuse element 1 is surface mounted in (not shown) through the formation of the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11 of back side 2b On the current path of circuit board.
Low-melting-point metal 5 be by electric conductor 6 ride over the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11 and connect electric conductivity Connecting material, for example, the metal using Sn as principal component can be used as solder cream.It is the material of commonly referred to as " Pb-free solder " Material.The fusing point of low-melting-point metal 5 is set as the temperature degree of reflow ovens.
Electric conductor 6 with low-melting-point metal 5 by being comparably high-melting-point, low-resistance conductive material is formed, such as Figure 10 to figure Shown in 11, ride over the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11 and be configured, be the component of substantially rectangular shape and plate.In addition, it leads Electric body 6 is not limited to rectangular-shaped, plate, but uses the shape in present embodiment from the viewpoint of easy to process.
Specifically, 6 preferred high-melting-point of electric conductor, low-resistance metal material, can use Ag, Au, Al, Cu, Cu to close Gold etc..Electric conductor 6 is preferably closed using the Cu or Cu that cheap and be unable to autoxidation envelope and easily connected by low-melting-point metal Gold.In addition, electric conductor 6 forms the electrical path between the 1st electrode 3 and the 3rd electrode 11, it can't be because of the electricity of overrate Flow spontaneous heating（Joule heat）And it fuses.But electric conductor 6 is not obviously interfered and is fused using spontaneous heating.
Heater 12 is to generate the resistive elements of heat for melting low-melting-point metal 5, is illustrated with aftermentioned circuit diagram, But it is electrically connected with the 2nd electrode 4, in addition hot connection.Have on electric circuit in the case that rated current flows through, application makes low The heat that melting point metals 5 melt.
[action of fuse element]
About fuse element 1 because the fusing of low-melting-point metal 5 and electric conductor 6 slides shifting on the surface 2a of insulated substrate 2 It is dynamic, it is detached until from the 1st electrode 3, the 3rd electrode 11 among the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11, so as to block Electrical path between 1st electrode 3 and the 3rd electrode 11.
Electric conductor 6 is respectively for the 1st electrode 3 and combination and the 2nd electrode 4 of the 3rd electrode 11, with different connection area profits It is connected with low-melting-point metal 5.Therefore, because the fusing of low-melting-point metal 5, electric conductor 6 because of different tension to be drawn to the 1st The mode of the combination of 3 and the 3rd electrode 11 of electrode and the larger side of connection area of the 2nd electrode 4 are on the surface 2a of insulated substrate 2 Slide movement.
Specifically, as shown in Figure 10 to Figure 12, in fuse element 1, so that the low-melting-point metal 5b on the 2nd electrode 4 Relative to electric conductor 6 connection area be more than the 1st electrode 3 on low-melting-point metal 5a relative to electric conductor 6 connection area and Low-melting-point metal 5c on 3rd electrode 11 is formed relative to the mode of the sum total of the connection area of electric conductor 6.Thus, electric conductor 6 Because the fusing of low-melting-point metal 5b and by into 4 side of the 2nd electrode, figure arrow direction draw, so as on the surface of insulated substrate 2 Movement is slided on 2a, as shown in figure 12, is maintained on the 2nd electrode 4 by low-melting-point metal 5b.
In addition, as shown in Figures 10 and 11, electric conductor 6 with than the 1st electrode 3 and the 3rd electrode 11 more to 4 lateral deviation of the 2nd electrode The state of shifting by low-melting-point metal 5a, 5b, 5c is connected and is maintained at the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11 respectively.
Specifically, electric conductor 6 is such as illustrated in Figure 10, the 1st electrode 3 and the 3rd electrode 11 and 6 weight of electric conductor are being set The length of multiple part is L1, the 2nd electrode 4 not with electric conductor 6 repeat part the 2nd electrode 4 length L2When, to become L1 ＜ L2Mode, to 4 side of the 2nd electrode deviate state assemble.
If this is because it cannot ensure the matched with the contact portions of the 1st electrode 3 and the 3rd electrode 11 of electric conductor 6 Length L1Above amount of movement cannot completely cut through being electrically connected for electric conductor 6 and the 1st electrode 3 and the 3rd electrode 11.In other words, The amount of movement of the electric conductor 6 of conveying is slided, the length L dependent on the 2nd electrode 4 not repeated with electric conductor 62, it can be said that It needs L2It is ensured to be L1More than.
Then, using circuit diagram, the action of fuse element 1 is illustrated.Such as Figure 13（A）It is shown, in fuse element 1, Electric conductor 6 is connect with the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11, so as to make between the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11 Conducting.Moreover, such as Figure 13（B）It is shown, when fuse element 1 is melted when low-melting-point metal 5 is because the warm from heater 12, make to lead Electric body 6 is moved to 4 Slideslip of the 2nd electrode, and electric conductor 6 detaches from the 1st electrode 3 and the 3rd electrode 11, so as to cut off the 1st electrode 3 and The conducting of 3rd electrode 11.Further it is evident that leading between the 1st electrode 3 and the 2nd electrode 4, between the 3rd electrode 11 and the 2nd electrode 4 can be cut off It is logical.Also cancel the energization to heater 12 as a result, therefore heater 12 stops fever.
[variation 6]
Then, as another example in the 2nd embodiment, variation 6 is illustrated.In the fuse element with above description 1 equal position marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 14, the fuse element 1 involved by variation 6 has on the surface 2a of insulated substrate 2 in the 1st electricity The supporting member 7 of electric conductor 6 is supported between 3 and the 3rd electrode 11 of pole and the 2nd electrode 4.In addition, Figure 14 is comparable in Figure 10 The sectional view of B-B ' lines.Supporting member 7 is configured between the 1st electrode 3 and the 3rd electrode 11 and the 2nd electrode 4, therefore in order to avoid Interelectrode short circuit preferably insulating materials is made of or is carried out the component of insulation coating.
Supporting member 7 can slidably and movingly support electric conductor 6, and be fixed on the surface 2a of insulated substrate 2.That is, branch Support component 7 and electric conductor 6 are simultaneously unlocked, and the shape as made the skidding of electric conductor 6 or coating are formd on supporting member 7.
If low-melting-point metal 5 melts electric conductor 6 receive the support of supporting member 7 simultaneously can be along level smoothly to the 2nd 4 Slideslip of electrode moves.That is, in the midway that low-melting-point metal 5 is moved to 4 Slideslip of the 2nd electrode, electric conductor 6 is in the 2nd electricity Low-melting-point metal 5b on pole 4 stretches out the state of cantilever, it is therefore envisaged that electric conductor 6 can be on the surface 2a of insulated substrate 2 It tilts and cannot suitably carry out slip movement.Therefore, supporting member 7 is by keeping the horizontality of electric conductor 6, can support be Slip movement can suitably be carried out.
[variation 7]
Then, as another example in the 2nd embodiment, variation 7 is illustrated.In the fuse element with above description 1 equal position marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 15, the fuse element 1 involved by variation 7 has the 1st electricity of protection on the surface 2a of insulated substrate 2 The The lid component 8 of pole 3, the 2nd electrode 4, the 3rd electrode 11, low-melting-point metal 5, electric conductor 6 etc..In addition, Figure 15 is comparable in Figure 10 B-B ' lines sectional view.
The lid component 8 is provided with the mobile specified part 8a in the movable area of regulation electric conductor 6, and having makes electric conductor 6 will not be to both Determine braking function as movement other than direction.The The lid component 8 can use such as thermoplastic, ceramics, glass ring oxygroup The component with insulating properties of plate etc. is formed.
In The lid component 8, mobile specified part 8a is extended to and 6 identical height of electric conductor, shifting on the surface 2a of insulated substrate 2 Dynamic specified part 8a is arranged on the position that given clearance is kept from the initial position of electric conductor 6 to the 1st electrode 3 and 11 side of the 3rd electrode. That is, mobile specified part 8a and electric conductor 6 are not contacted in the initial position of electric conductor 6, but in a state that low-melting-point metal 5 melts Electric conductor 6 because hit when due tos moved to the 1st electrode 3 and 11 side of the 3rd electrode when movement specified part 8a and electric conductor 6 contact, make to lead Electric body 6 will not slide movement to the direction of mistake.
In a state that even if mobile specified part 8a provides the movement of electric conductor 6, if the electric conductor 6 of low-melting-point metal 5b sides Connection area it is larger, then after all because low-melting-point metal 5b tension and electric conductor 6 can to 4 side-lining of the 2nd electrode, so as to lead Electric body 6 is also moved to 4 Slideslip of the 2nd electrode.
Therefore, mobile specified part 8a prevents electric conductor 6 to be moved to the 1st by providing the movement of electric conductor 6 round about 11 side of electrode 3 and the 3rd electrode, and can reliably be moved to 4 Slideslip of the 2nd electrode.
[variation 8]
Then, as another example in the 2nd embodiment, variation 8 is illustrated.In the fuse element with above description 1 equal position marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 16, the fuse element 1 involved by variation 8 has regulation conduction on the surface 2a of insulated substrate 2 The mobile regulation component 9 of the movement of body 6.In addition, Figure 16 is comparable to the sectional view of the B-B ' lines in Figure 10.
Mobile regulation component 9 is integrally fixed on the surface 2a of insulated substrate 2, and the 1st electrode 3 is especially integrally fixed in this structure Component on upper and the 3rd electrode 11, having makes electric conductor 6 will not be to braking function as movement other than set direction.It is mobile Regulation component 9 is set, the short circuit of circuit in order to prevent because of the 3rd electrode 11 is ridden over from the 1st electrode 3, it is preferred to use tree The insulator of fat material etc..
Mobile regulation component 9 extends to and 6 identical height of electric conductor, mobile regulation structure on the surface 2a of insulated substrate 2 Part 9 is arranged on the position that given clearance is kept from the initial position of electric conductor 6 to the 1st electrode 3 and 11 side of the 3rd electrode.It is that is, mobile Regulation component 9 and electric conductor 6 are not contacted in the initial position of electric conductor 6, but conductive in the state of the fusing of low-melting-point metal 5 Body 6 because hit when due tos can be moved to the 1st electrode 3 and 11 side of the 3rd electrode when movement regulation component 9 and electric conductor 6 contact, make conduction Body 6 will not slide movement to the direction of mistake.
Even if in a state that mobile regulation component 9 provides the movement of electric conductor 6, if the conduction of low-melting-point metal 5b sides The connection area of body 6 is larger, then after all because the tension of low-melting-point metal 5b and electric conductor 6 can to 4 side-lining of the 2nd electrode, from And electric conductor 6 is also moved to 4 Slideslip of the 2nd electrode.
Therefore, mobile regulation component 9 is by providing the movement of electric conductor 6 round about, and electric conductor 6 is prevented to be moved to the 1 electrode 3 and 11 side of the 3rd electrode, and can reliably be moved to 4 Slideslip of the 2nd electrode.
[variation 9]
Then, as another example in the 2nd embodiment, variation 9 is illustrated.For the fuse member with above description The equal position of part 1 marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 17, it is conductive to have guiding on the surface 2a of insulated substrate 2 for the fuse element 1 involved by variation 9 The guide part 10 of the movement of body 6.In addition, Figure 17 is the plan view had an X-rayed electric conductor 6 and watched from the top of fuse element 1, with Electric conductor 6 shown in phantom.
Ways 10 is integrally fixed at the component on the surface 2a of insulated substrate 2, and having makes electric conductor 6 be moved along set direction The dynamic guide function along moving direction.Ways 10 is preferably by from 11 lateral 2nd electrode 4 of the 1st electrode 3 and the 3rd electrode Parallel two component of side extension is formed, and using the insulator of resin material etc., so that will not short circuit between two electrodes.
Ways 10 extends on the surface 2a of insulated substrate 2 to be set with 6 identical height of electric conductor, ways 10 In the position as guide rail for providing moving direction from side from initial position to the range that 4 side of the 2nd electrode is moved to electric conductor 6 It puts.That is, ways 10 and electric conductor 6 are contacted from the initial position of electric conductor 6 in side, until what low-melting-point metal 5 melted Until electric conductor 6 is moved to 4 side of the 2nd electrode under state, electric conductor 6 is made not slided along the direction of mistake and is moved.
Therefore, ways 10 is provided by that can tilt to electric conductor 6 or along inclined direction move so that conductive Body 6 can be moved reliably to 4 Slideslip of the 2nd electrode.
[variation 10]
Then, as another example in the 2nd embodiment, variation 10 is illustrated.For the fuse with above description The equal position of element 1 marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 18, the fuse element 1 involved by variation 10 is so that the shape of electric conductor 6 is formed for trapezoidal shape. In addition, Figure 18 is the plan view had an X-rayed electric conductor 6 and watched from the top of fuse element 1, electric conductor 6 shown in dotted line.
Electric conductor 6 is set as rectangular-shaped in above-mentioned another example, but with using the 1st electrode 3 and 11 side of the 3rd electrode to be short The upper bottom on side, the construction of the trapezoidal shape using 4 side of the 2nd electrode as the bottom of long side.I.e. electric conductor 6 is in the 1st electrode 3 and the 3rd electrode The area of 11 sides becomes smaller, and relatively the area of 4 side of the 2nd electrode becomes larger.Therefore, by 6 and the 1st electrode 3 of electric conductor, the 2nd electrode 4, The connection area that 3rd electrode 11 and low-melting-point metal 5 are formed, 4 side of the 2nd electrode can be more than the 1st electrode 3 and 11 side of the 3rd electrode Sum total, the drawing force that the low-melting-point metal 5b of fusing is brought become larger.
Therefore, fuse element 1, which becomes, can be such that the electric conductor 6 of trapezoidal shape is reliably moved to 4 Slideslip of the 2nd electrode.
[variation 11]
Then, as another example in the 2nd embodiment, variation 11 is illustrated.For the fuse with above description The equal position of element 1 marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 19, the fuse element 1 involved by variation 11, the shape of electric conductor 6 is configured to tool, and there are two convex The shape in portion.In addition, Figure 19 be perspective electric conductor 6 and from the plan view that the top of fuse element 1 is watched, conduction shown in dotted line Body 6.
Electric conductor 6 is set as rectangular-shaped in above-mentioned another example, but with using 3 side of the 1st electrode as the upper bottom of short side It is trapezoidal and using 11 side of the 3rd electrode as the construction of the shape that is trapezoidal, setting two protrusions 6a, 6b at the upper bottom of short side.I.e. electric conductor 6 exists 1st electrode 3 and the area of 11 side of the 3rd electrode become smaller, and relatively the area in 4 side of the 2nd electrode becomes larger.Therefore, electric conductor 6 and The connection area that 1 electrode 3, the 2nd electrode 4, the 3rd electrode 11 and low-melting-point metal 5 are formed, 4 side of the 2nd electrode be more than the 1st electrode 3 and The sum total of 3rd electrode, 11 side, the drawing force that the low-melting-point metal 5b of fusing is brought become larger.
Therefore, fuse element 1, which becomes, can be such that the electric conductor 6 of trapezoidal shape is reliably moved to 4 Slideslip of the 2nd electrode.
Variation 11 could also say that reduce electric conductor 6 compared with variation 10, and cuts and energization is not acted on Part shape.Pass through the miniaturization of electric conductor 6 so that electric conductor 6 is easily mobile.
Each variation in 2nd embodiment described above, can use in any combination, in order to be coordinated Effect, it is clear that can appropriately combined use.That is, it can be said that by being applicable in all each variations, make when low-melting-point metal 5 melts Electric conductor 6 reliably moves, and the electrical connection that can be assuredly shut off between the 1st electrode 3 and the 3rd electrode 11.
[the 3rd embodiment]
[fuse element]
Another embodiment of fuse element 1 according to the present invention is illustrated.In addition, for being said with the 1st embodiment There is the structure of equal function to mark identical label and omit the description for bright part.
As shown in Figure 20 to Figure 22, fuse element 1 according to the present invention has：Insulated substrate 2；Configuration is in insulated substrate Multiple electrodes 3,4,11 on 2（Hereinafter, it is recorded as the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11.）；Via low-melting-point metal 5 It is connect respectively with the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11, and the electric conductor 6 that fusing point is higher than low-melting-point metal 5；And match Put the heater 12 in the lower section of the 2nd electrode 4.
In addition, Figure 20 and Figure 22 are the plan views had an X-rayed electric conductor 6 and watched from the top of fuse element 1, shown with dotted line Go out electric conductor 6.Figure 21 is the sectional view on the C-C ' lines of Figure 20.
Insulated substrate 2 is substantially rectangular shape, for example, having by aluminium oxide, glass ceramics, mullite, zirconium oxide etc. The component of insulating properties is formed as square shape.In addition, insulated substrate 2 can also use the use of glass epoxy substrate, phenol substrate etc. In the material of printed circuit board.
In the one end of insulated substrate 2, it is formed with the 1st electrode 3.In addition, in the other end of insulated substrate 2, particularly The end that one end with being provided with the 1st electrode 3 abuts, is formed with the 2nd electrode 4.And then insulated substrate 2 is electric with formation the 1st The opposed end of the one end of pole 3, is formed with the 3rd electrode 11.1st electrode 3 and the 3rd electrode 11 are arranged opposite in insulated substrate 2 Surface 2a on, the 2nd electrode 4 is set in a manner of extending between the 1st electrode 3 and the 3rd electrode 11, in other words, it may be said that with Make that the 2nd electrode 4 separates the 1st electrode 3 and the mode of the 3rd electrode 11 is configured.
1st electrode 3, the 2nd electrode 4, the 3rd electrode 11 are formed respectively by the conductive pattern of Cu or Ag wirings etc., in Cu In the case of Deng the wiring material easily aoxidized, as anti-oxidation countermeasure, Ni/Au coating or Sn coating suitably are set on surface Deng protective layer.In addition, the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11 from the surface 2a of insulated substrate 2 via side to the back side 2b.Fuse element 1 is surface mounted in (not shown) through the formation of the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11 of back side 2b On the current path of circuit board.
Low-melting-point metal 5 be by electric conductor 6 ride over the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11 and connect electric conductivity Connecting material, for example, the metal using Sn as principal component can be used as solder cream.It is the material of commonly referred to as " Pb-free solder " Material.The fusing point of low-melting-point metal 5 is set as the temperature degree of reflow ovens.
Electric conductor 6 with low-melting-point metal 5 by being comparably high-melting-point, low-resistance conductive material is formed, such as Figure 20 to figure Shown in 21, ride over the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11 and be configured, be the component of substantially rectangular shape and plate.In addition, it leads Electric body 6 is not limited to rectangular-shaped, plate, but uses the shape in present embodiment from the viewpoint of easy to process.
Specifically, 6 preferred high-melting-point of electric conductor, low-resistance metal material, can use Ag, Au, Al, Cu, Cu to close Gold etc..Electric conductor 6 is preferably closed using the Cu or Cu that cheap and be unable to autoxidation envelope and easily connected by low-melting-point metal Gold.In addition, electric conductor 6 forms the electrical path between the 1st electrode 3 and the 3rd electrode 11, it will not be because of the electricity of overrate Flow spontaneous heating（Joule heat）And it fuses.But electric conductor 6 is not obviously interfered and is fused using spontaneous heating.
Heater 12 is to generate the resistive elements of heat for melting low-melting-point metal 5, is illustrated with aftermentioned circuit diagram, But it is electrically connected with the 2nd electrode 4, in addition hot connection.Have on electric circuit in the case that rated current flows through, application makes low The heat that melting point metals 5 melt.
[action of fuse element]
About fuse element 1 because the fusing of low-melting-point metal 5 and electric conductor 6 rotates shifting on the surface 2a of insulated substrate 2 It is dynamic, until being detached from the 1st electrode 3, the 3rd electrode 11 among the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11, so as to block Electrical path between 1st electrode 3 and the 3rd electrode 11.
Electric conductor 6 is respectively for the 1st electrode 3 and combination and the 2nd electrode 4 of the 3rd electrode 11, with different connection area profits It is connected with low-melting-point metal 5.Therefore, because the fusing of low-melting-point metal 5, electric conductor 6 because of different tension to be drawn to the 1st The mode of the combination of 3 and the 3rd electrode 11 of electrode and the larger side of connection area of the 2nd electrode 4 are on the surface 2a of insulated substrate 2 Moving in rotation.
Specifically, as shown in Figure 20 to Figure 22, in fuse element 1, so that the low-melting-point metal 5b on the 2nd electrode 4 Relative to electric conductor 6 connection area be more than the 1st electrode 3 on low-melting-point metal 5a relative to electric conductor 6 connection area and Low-melting-point metal 5c on 3rd electrode 11 is formed relative to the mode of the sum total of the connection area of electric conductor 6.Thus, electric conductor 6 Because the fusing of low-melting-point metal 5b and into 4 side of the 2nd electrode, figure arrow direction while rotation while drawn, so as to insulation base Moving in rotation on the surface 2a of plate 2 as shown in figure 22, is maintained at by low-melting-point metal 5b on the 2nd electrode 4.
In addition, as shown in Figure 20 and Figure 21, about electric conductor 6, the central part O configurations of spinning movement will be carried out in the 2nd electricity On pole 4, and distinguished with the state that end is slightly repeated with the 1st electrode 3 and the 3rd electrode 11 using low-melting-point metal 5a, 5b, 5c Connection is maintained at the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11.
Specifically, as shown in fig. 20, shape of the electric conductor 6 centered on central part O point-symmetrically is excellent Choosing makes its center of gravity in central part O.This is to make electric conductor 6 using central part O as the easy moving in rotation of axis.In addition, pass through connection The line segment in 6 corner carrys out defined angle, θ from central part O to electric conductor1, it is the required minimum rotation angle of electric conductor 6, separately Outside, as shown in figure 22, become angle of the electric conductor 6 to 4 required width of the 2nd electrode of regulation rotation.
In addition, electric conductor 6 in 3 side of the 1st electrode, 11 side of the 3rd electrode, is respectively provided with the protruding portion prominent to direction of rotation 6c、6d.I.e. electric conductor 6 is it may be said that in substantially zigzag shape.
Electric conductor 6 is connect, and pass through low-melting-point metal as protruding portion 6c by low-melting-point metal 5a with the 1st electrode 3 5b is connect with the 2nd electrode 4.Thus, prominent to direction of rotation by protruding portion 6c, the low-melting-point metal 5b that can be melted is obliquely Traction.In addition, electric conductor 6 is connect as protruding portion 6d by low-melting-point metal 5c with the 3rd electrode 11, and pass through low melting point gold Belong to 5b to connect with the 2nd electrode 4.Thus, prominent to direction of rotation by protruding portion 6d, the low-melting-point metal 5b that can be melted is tilted It draws on ground.
Electric conductor 6 is applied in along direction of rotation is led respectively by points outside symmetrical protruding portion 6c, 6d in central part O The power drawn is rotated so as to generate turning moment using central part O as rotation center.
Then, using the action of open fuse element 1 for circuit diagram.Fuse element 1 such as Figure 23（A）It is shown, electric conductor 6 with 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11 connect, and make to be connected between the 1st electrode 3, the 2nd electrode 4, the 3rd electrode 11.Moreover, fuse Element 1 such as Figure 23（B）It is shown, when low-melting-point metal 5 melts due to the heat from heater 12, make electric conductor 6 to the 2nd electrode 4 Side moving in rotation, electric conductor 6 are detached from the 1st electrode 3 and the 3rd electrode 11, so as to cut off leading for the 1st electrode 3 and the 3rd electrode 11 It is logical.Further it is evident that the conducting between the 1st electrode 3 and the 2nd electrode 4, between the 3rd electrode 11 and the 2nd electrode 4 can be cut off.Also disappear as a result, Except the energization to heater 12, heater 12 stops fever.
[variation 12]
Then, as another example in the 3rd embodiment, variation 12 is illustrated.For the fuse with above description The equal position of element 1 marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 24, for the fuse element 1 involved by variation 12 on the surface 2a of insulated substrate 2, having will be conductive Body 6 is supported on the supporting member 7 between the 1st electrode 3 and the 3rd electrode 11 and the 2nd electrode 4.In addition, Figure 24 is comparable in Figure 20 C-C ' lines sectional view.Supporting member 7 is configured between the 1st electrode 3 and the 3rd electrode 11 and the 2nd electrode 4, therefore, in order to Interelectrode short circuit is avoided, is preferably made of or is carried out the component of insulation coating insulating materials.
Supporting member 7 can support to moving in rotation electric conductor 6, and be fixed on the surface 2a of insulated substrate 2.That is, branch Support component 7 and electric conductor 6 are simultaneously unlocked, and the shape as made the skidding of electric conductor 6 or coating are formd on supporting member 7.In addition, because For 6 moving in rotation of electric conductor, supporting member 7 is preferably arranged to arc-shaped.
If low-melting-point metal 5 melts electric conductor 6 receive the support of supporting member 7 simultaneously can be along level smoothly to the 2nd 4 side moving in rotation of electrode.That is, in low-melting-point metal 5 to the midway of 4 side moving in rotation of the 2nd electrode, electric conductor 6 is in the 2nd electricity Low-melting-point metal 5b on pole 4 stretches out the state of cantilever, it is therefore envisaged that electric conductor 6 can be on the surface 2a of insulated substrate 2 Tilt and cannot appropriate moving in rotation.Therefore, supporting member 7 is by keeping the horizontality of electric conductor 6, can support as can It is appropriate to carry out moving in rotation.
[variation 13]
Then, as another example in the 3rd embodiment, variation 13 is illustrated.For the fuse with above description The equal position of element 1 marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 25, it is conductive to have guiding on the surface 2a of insulated substrate 2 for the fuse element 1 involved by variation 13 The guide part 10 of the movement of body 6.In addition, Figure 25 be perspective electric conductor 6 and from the plan view that the top of fuse element 1 is watched, with Electric conductor 6 shown in phantom.
Ways 10 is integrally fixed at the component on the surface 2a of insulated substrate 2, and having makes electric conductor 6 be revolved along set direction Transfer is dynamic in this way along the guide function of moving direction.Ways 10 is preferably by from the 1st electrode 3 and the 3rd electrode 11 the lateral 2nd Two components of the opposed arc-shaped of 4 side of electrode extension are formed, and using the insulator of resin material etc., so that between two electrodes It will not short circuit.
Ways 10 extends on the surface 2a of insulated substrate 2 to be set with 6 identical height of electric conductor, ways 10 Guide rail is being become from initial position to the range of 4 side moving in rotation of the 2nd electrode from side regulation moving direction to electric conductor 6 Position.That is, ways 10 and electric conductor 6 are contacted from the initial position of electric conductor 6 in side, until low-melting-point metal 5 melts In the state of electric conductor 6 to until 4 side moving in rotation of the 2nd electrode, electric conductor 6 is made not to be detached from from spinning movement.
Therefore, ways 10 can make electric conductor 6 reliably to 4 side moving in rotation of the 2nd electrode.
[variation 14]
Then, as another example in the 3rd embodiment, variation 14 is illustrated.For the fuse with above description The equal position of element 1 marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 26, the fuse element 1 involved by variation 14 has protection the 1st on the surface 2a of insulated substrate 2 The The lid component 8 of electrode 3, the 2nd electrode 4, the 3rd electrode 11, low-melting-point metal 5, electric conductor 6 etc..In addition, Figure 26 is comparable to Figure 20 In C-C ' lines sectional view.
The lid component 8 is provided with the mobile specified part 8a in the movable area of rotation of regulation electric conductor 6, and having makes electric conductor 6 will not Braking function as movement other than to set direction of rotation.The The lid component 8 can use such as thermoplastic, ceramics, glass The component with insulating properties of glass epoxy substrate etc. is formed.
In The lid component 8, mobile specified part 8a is extended to and 6 identical height of electric conductor, shifting on the surface 2a of insulated substrate 2 Dynamic specified part 8a is arranged on the position that given clearance is kept from the initial position of electric conductor 6 to the 1st electrode 3 and 11 side of the 3rd electrode. That is, mobile specified part 8a and electric conductor 6 are not contacted in the initial position of electric conductor 6, but the state melted in low-melting-point metal 5 Lower electric conductor 6 rotary shaft due tos shock etc. mobile specified part 8a and electric conductor 6 can contact in the case of central part O offsets, by force System ground makes the direction of rotation of electric conductor 6 using central part O as rotary shaft.That is, mobile specified part 8a be referred to as making electric conductor 6 into The ways of row spinning movement.
Even if in a state that mobile specified part 8a provides the movement of electric conductor 6, if the conduction of low-melting-point metal 5b sides The connection area of body 6 is larger, then after all because low-melting-point metal 5b tension and electric conductor 6 also can to 4 side-lining of the 2nd electrode, So as to carry out moving in rotation in a manner of electric conductor 6 to be made to take on the 2nd electrode 4.
Therefore, the movement other than direction of rotation of the mobile specified part 8a by providing electric conductor 6, prevents electric conductor 6 from moving To the 1st electrode 3 and 11 side of the 3rd electrode, and can in a manner of taking on the 2nd electrode 4 reliably moving in rotation.
[variation 15]
Then, as another example in the 3rd embodiment, variation 15 is illustrated.For the fuse with above description The equal position of element 1 marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 27, the shape of electric conductor 6 is configured to tool there are two recess portion by the fuse element 1 involved by variation 15 The shape of 6e, 6f.In addition, Figure 27 be perspective electric conductor 6 and from the plan view that the top of fuse element 1 is watched, it is shown in dotted line Electric conductor 6.
Electric conductor 6 is set as substantially zigzag shape in above-mentioned another example, but with being constructed as below, that is, is set as in the 1st electricity The corner of side farthest the distance center portion O of 3 side of pole and in the corner of side farthest 11 lateral extent central part O of the 3rd electrode Carry out the shape of recess portion 6e, 6f of two notch.That is area of the electric conductor 6 in the 1st electrode 3 and 11 side of the 3rd electrode reduces notch Amount, relatively the area of 4 side of the 2nd electrode becomes larger.Therefore, 6 and the 1st electrode 3 of electric conductor, the 2nd electrode 4, the 3rd electrode 11 and eutectic The connection area that point metal 5 is formed, can be more than the sum total of the 1st electrode 3 and 11 side of the 3rd electrode in 4 side of the 2nd electrode, fusing it is low The drawing force that melting point metals 5b is brought becomes larger.
Therefore, the electric conductor 6 that fuse element 1 can make to have recess portion 6e, 6f is reliably to 4 side moving in rotation of the 2nd electrode.
Alternatively variation 15 be in order to compared with variation 10 reduce electric conductor 6 and cut to energization do not have it is effective Partial shape.By the miniaturization of electric conductor 6, become easily mobile electric conductor 6.
[variation 16]
Then, as another example in the 3rd embodiment, variation 16 is illustrated.For the fuse with above description The equal position of element 1 marks identical label and omits the description, and difference section is especially illustrated.
As shown in figure 28, compared with variation 15, fuse element 1 involved by variation 16 is by the shape structure of electric conductor 6 As the kerf that two recess portions 6e, 6f are made to arc-shaped.In addition, Figure 28 is the figure for only illustrating electric conductor 6, but about Other positions are same with variation 15.
Electric conductor 6 is set as substantially zigzag shape in above-mentioned another example, but with being constructed as below, that is, is set as in the 1st electricity The corner of side farthest 3 lateral extent central part O of pole and in the angle part of side farthest 11 lateral extent central part O of the 3rd electrode Not carry out arc-shaped notch recess portion 6e, 6f shape.I.e. electric conductor 6 becomes the 1st electrode 3 and the area of 11 side of the 3rd electrode subtracts Small notch amount, relatively the area of 4 side of the 2nd electrode become larger.Therefore, 6 and the 1st electrode 3 of electric conductor, the 2nd electrode 4, the 3rd electrode 11 The connection area formed with low-melting-point metal 5 can be more than the sum total of the 1st electrode 3 and 11 side of the 3rd electrode in 4 side of the 2nd electrode, melt The drawing force that the low-melting-point metal 5b of change is brought becomes larger.
In addition, electric conductor 6 because be set as by recess portion 6e, 6f notch into arc-shaped shape without angle, in moving in rotation When the part do not blocked and smooth rotation can be carried out.
In addition, there is electric conductor 6 part that will be equivalent to recess portion 6e, 6f to be made to detach from the surface 2a of insulated substrate 2 The construction of warpage portion 6g, the 6h that upwarp of mode.That is, electric conductor 6 is taking the 2nd because the end face of direction of rotation upwarps Smooth action can be carried out during electrode 4, can prevent from snapping into the end of the 2nd electrode 4 and moving in rotation cannot be completed.
Therefore, fuse element 1 becomes and can make to have the electric conductor 6 of recess portion 6e, 6f and warpage portion 6g, 6h to take the 2nd Mode on electrode 4 reliably moving in rotation.
Each variation in 3rd embodiment described above, can arbitrarily combine and use, in order to be coordinated Effect, it is clear that can appropriately combined use.That is, it can be said that by being applicable in all each variations, make when low-melting-point metal 5 melts The reliably moving in rotation, and the electrical connection that can be assuredly shut off between the 1st electrode 3 and the 3rd electrode 11 of electric conductor 6.
In addition, in the 3rd embodiment, such as shown in figure 28, can also have the fulcrum S of support electric conductor 6, with center The mode that portion O will not be deviated, axis support electric conductor 6 without setting guide part etc., can construct to support conduction with simple The moving in rotation of body 6.Fulcrum S can also be protruded from the 2nd electrode 4, and in the case of using The lid component 8, it can also be from lid structure Part 8 protrudes.In addition, in order to receive fulcrum S and it is preferred that setting recess portion or through hole in electric conductor 6.
In addition, in above first embodiment to the 3rd embodiment, electric conductor is illustrated by taking the metallic plate of Cu etc. as an example 6, it is clear that the fuse cell of the laminated type of low-melting-point metal and refractory metal can also be used.
In addition, in the fuse element for being applicable in the present invention, no matter either with or without internal heater, it is clear that it suitably needs to be used for The heat source of low-melting-point metal 5 is melted, and, it is clear that or in external setting heater or using the spontaneous of electric conductor 6 The method of heat.
Label declaration
1 fuse element；2 insulated substrates；2a surfaces；The 2b back sides；3 the 1st electrodes；4 the 2nd electrodes；5 low-melting-point metals；5a Low-melting-point metal on 1st electrode；Low-melting-point metal on the 2nd electrodes of 5b；Low-melting-point metal on the 3rd electrodes of 5c；6 lead Electric body；6a, 6b protrusion；6c, 6d protruding portion；6e, 6f recess portion；6g, 6h warpage portion；7 supporting members are sent out；8 The lid components；8a Mobile specified part；9 movement regulation components；10 ways；11 the 3rd electrodes；12 heaters.

Claims (11)

1. a kind of fuse element, has：
Insulated substrate；
The multiple electrodes on the insulated substrate are configured；And
It is connect respectively with the multiple electrode via low-melting-point metal and electric conductor that fusing point is higher than the low-melting-point metal,
The electric conductor by the fusing of the low-melting-point metal, be moved to at least one detach among the multiple electrode and Block arbitrary interelectrode electrical path.
2. fuse element as described in claim 1, wherein,
The multiple electrode is made of the 1st electrode and the 2nd electrode,
In the electric conductor, the connection area formed using the low-melting-point metal of the 2nd electrode is more than the 1st electrode Using the low-melting-point metal formed connection area.
3. fuse element as described in claim 1, wherein,
The multiple electrode is made of the 1st electrode, the 2nd electrode and the 3rd electrode,
In the electric conductor, the connection area formed using the low-melting-point metal of the 2nd electrode is more than the 1st electrode Utilize the low-melting-point metal formed connection area and the 3rd electrode using the low-melting-point metal formed connection The sum total of area.
4. such as any one of them fuse element of claims 1 to 3, wherein,
It is further equipped with providing the regulation component of the moving direction of the electric conductor when the low-melting-point metal melts.
5. such as any one of them fuse element of claims 1 to 3, wherein,
It is further equipped with guiding the ways of the moving direction of the electric conductor when the low-melting-point metal melts.
6. such as any one of them fuse element of claims 1 to 3, wherein,
It is further equipped with heater,
The heater melts the low-melting-point metal due to fever for the generation that is powered.
7. such as any one of them fuse element of claims 1 to 3, wherein,
About the electric conductor, the end of side that when low-melting-point metal fusing moves from the insulated substrate to detaching Direction upwarps.
8. fuse element as claimed in claim 3, wherein,
Electric conductor moving in rotation, line being set as centered on rotation center position when the low-melting-point metal melts is symmetrical Shape.
9. fuse element as claimed in claim 3 or claim 8, wherein,
Electric conductor moving in rotation when the low-melting-point metal melts, center of gravity are in rotation center.
10. such as any one of them fuse element of claims 1 to 3, wherein,
The electric conductor is made of Cu or Cu alloys.
11. such as any one of them fuse element of claims 1 to 3, wherein,
The low-melting-point metal is solder cream.
CN201680060187.1A 2015-10-27 2016-10-25 Fuse element Active CN108140508B (en)

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JP2015211340A JP6739922B2 (en) 2015-10-27 2015-10-27 Fuse element
JP2015-211340 2015-10-27
PCT/JP2016/081524 WO2017073539A1 (en) 2015-10-27 2016-10-25 Fuse element

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JP6739922B2 (en) 2020-08-12
WO2017073539A1 (en) 2017-05-04
JP2017084591A (en) 2017-05-18
TWI701693B (en) 2020-08-11
KR102032665B1 (en) 2019-11-08
CN108140508B (en) 2020-01-17
TW201729230A (en) 2017-08-16
KR20180050736A (en) 2018-05-15

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