JP4870999B2 - Multi-pole fuse - Google Patents

Description

  The present invention is attached to electrical equipment that is a load such as a vehicle device such as a headlamp, a power window, and a wiper of a vehicle such as an automobile and a truck, or an electrical component such as a car audio, a car navigation, and an air conditioner. The present invention relates to a multipolar fuse having a large number of terminals corresponding to electrical equipment.

  Conventionally, a large number of fuses have been provided in a vehicle or the like in order to prevent the electric system equipment as a load from causing overcurrent due to a short circuit accident of a circuit, smoke generation, and melting, and these fuses are fuse boxes, It is stored in the relay block, junction block and so on. This type of fuse is generally a blade-type fuse formed thinly for a small current, and is attached to the fuse box or the like in a replaceable manner. The blade-type fuse is disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-317605.

  FIG. 14 shows a conventional blade-type fuse. The fuse 41 includes a fuse element 42 made of a conductive metal plate, and a housing 46 having insulation and storing the fuse element 42 except for its terminal 44. It consists of Further, the fuse element 42 is installed between a pair of conductive plates 43 facing each other at a predetermined interval, the terminals 44 formed at one end of each conductive plate 43, and the pair of conductive plates 43. The fusing part 45 is comprised.

The fuses configured in this manner are provided with various capacities such as 5A, 10A, and 15A by changing the thickness, width, and the like of the fusing portion 45, and 1 corresponding to the circuit of the electrical system equipment. A plurality of fuse boxes and junction blocks are arranged inside. The fuses of various capacities are manufactured by a fuse manufacturer, and then packed and packaged and delivered to a fuse supplier such as an electrical equipment assembly manufacturer or its parts manufacturer, where they are distributed to each electrical equipment. They are assembled into a fuse box, junction block, etc. in an arrangement corresponding to the circuit to be designed, and are manufactured as a multipolar fuse having a large number of terminals.
JP 2003-317605 A

  However, it takes a lot of time and effort to sequentially assemble a large number of fuses having different capacities one by one at a predetermined position in a fuse box or the like at a fuse supplier such as an assembly manufacturer of electrical equipment. Cost and high cost. In addition, it is necessary to install various facilities such as a parts feeder that sequentially feeds fuses to the assembly machine for each assembly manufacturer of electrical equipment.

  In addition, since the volume in the vehicle is constant, the space allowed for the installed electrical system equipment is also limited, and the number of fuses used in conjunction with the increase in the functions of various electrical system equipment is also increased. It has increased. As a result, the fuse box, the junction block, etc. have become large, resulting in problems with storage space.

  In addition, a multi-type fuse in which, for each electrical equipment, a single metal plate having conductivity is stamped and formed corresponding to the circuit routed to the electrical equipment, and a plurality of fusing parts and terminals are formed. An apparatus and a fusible link unit are disclosed in Japanese Patent Laid-Open Nos. 2001-54223 and 2004-186005. However, this type of fuse device or the like is manufactured by punching a conductive metal plate in accordance with a pattern defined in a circuit for arranging individual electrical equipment. It is unique. That is, the fuses have different capacities by making the fusing parts different, but the fuse device or the like has the positions of the fusing parts in one conductive metal plate set in advance corresponding to each electrical equipment. Yes. For this reason, when manufacturing a fuse device for another electrical equipment, it is necessary to create a new punching mold for the metal plate or remodel it to make a new conductive metal plate. The degree of freedom in design was small, and it was impossible to manufacture flexibly corresponding to various electrical equipment.

  Accordingly, an object of the present invention is to provide a multipolar fuse that can be flexibly adapted to various electrical equipments, can be manufactured efficiently and inexpensively, and can be miniaturized.

Multipolar fuse of claim 1, Ru der fuse itself comprising storing one of the fuse element to one of the housing on one of the case and adjacent to the chained those multiple storage. The fuse element has a pair of conductive plates juxtaposed at a predetermined interval, a terminal formed at one end of each conductive plate, and a fusing portion provided between the pair of conductive plates. Here, when any one of the fuses is melted during use, it is possible to replace only the fuses individually. The capacities of a plurality of fuses are basically mixed, but they may all be the same.

According to a second aspect of the present invention, a fuse according to the first aspect is configured such that a single fuse having various capacities is freely arranged corresponding to a circuit on the load side.

According to a third aspect of the present invention, the pair of conductive plates of the fuse element is formed of a flat plate and juxtaposed with the flat surfaces facing each other.

Multipolar fuse of claim 4, fuses alone is accommodated in interchangeably to case.

Multipolar fuse of claim 5, fuses alone are arranged in tandem in to case.
According to a sixth aspect of the present invention, the fuse itself is arranged side by side in the case.
According to a seventh aspect of the present invention, a single fuse is disposed in the case at equal intervals.

Multipolar fuse of claim 1, since the fuse element is obtained by accommodating freely by adjacent chained multiple intact one case of the fuse itself composed stored individually to the housing, each species capacity fuses Can be combined in various ways, or the number of stored fuses can be arbitrarily set, and a multipolar fuse can be manufactured flexibly corresponding to various electrical equipment.

  In addition, it is possible to eliminate boxing and packing work at the fuse manufacturer and removal from the box and supply work to the assembling machine at the supplier manufacturer. Can be manufactured.

  Furthermore, by storing a plurality of fuses in a single case adjacent to each other in a chain, by simply placing a plurality of fuses adjacent to each other in a chain, as compared to a single fuse arranged individually in a fuse box or the like. The total volume is reduced by the dense storage. As a result, the electrical equipment can be reduced in size, and the occupied space can be reduced.

The multipolar fuse of claim 2 has the same effect as that of claim 1 because the fuses of various capacities are freely arranged in the case corresponding to the circuit on the load side.

In the multipolar fuse of claim 3 , in particular, the conductive plate of the fuse element is formed of a flat plate, and the planes are juxtaposed in a state where the flat surfaces face each other, so that the interval between the pair of conductive plates can be reduced. Further downsizing is possible.

Multipolar fuse of claim 4, when blown in use, to be replaced only solution sectional was fuses alone.

Multipolar fuse of claims 5 to 7, it can be arranged better appearance of fuses alone in to case.

<First Embodiment>
A multipolar fuse according to a first embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 shows a perspective view of the multipolar fuse of the first embodiment of the present invention, FIG. 2 (a) is a plan view of the multipolar fuse, FIG. 1 (b) is a front view, and FIG. 3 (a). 1 is a plan view of the fuse element in FIG. 1, FIG. 2B is a front view, and FIG. 1C is a side view.

  1 to 3, the multipolar fuse 1 is a unit in which a plurality of conductive fuse elements 11 are arranged inside a housing 21 having an insulating property except for the respective terminals 13. This multipolar fuse 1 is a fuse in which a large number of terminals 13 are exposed to the outside from the bottom surface of one housing 21 in the vertical direction to form a multipolar, and like a fuse box, a junction block, etc. It is mounted on circuits arranged for electrical equipment such as equipment such as headlamps and wipers, and electrical equipment such as car audio and air conditioners. In FIG. 1 and FIG. 2, the fuse elements 11 are stored in the housing 21 vertically and horizontally and stored in 11 × 3 rows = 33.

  The fuse element 11 is formed by stamping and forming one conductive metal plate, and as shown in FIG. 3, a pair of thin plate-like conductive plates 12 juxtaposed at a predetermined interval, and the respective conductive members. A terminal 13 formed at one end of the plate 12 and a fusing portion 14 installed between the pair of conductive plates 12 are configured.

  The fuse element 11 is formed by cutting a central portion of a long zinc alloy conductive plate material into a constant width along the longitudinal direction to form a thin portion, and then transferring the long conductive plate material. After sequentially punching out the portions to be the fuse elements 11 by press molding, the boundary portion is cut into a single body, and the tapered portion 13a is formed at the tip portion of the terminal 13, thereby being manufactured one by one. The fuse element 11 is formed in this way, and is entirely formed in one plane. The tapered portion 13a of the terminal 13 facilitates insertion into the mounted portion.

  The fusing part 14 constituting the fuse element 11 is formed into a substantially S shape or a substantially inverted U shape by punching, and is integrally constructed between the pair of conductive plates 12 juxtaposed at a predetermined interval. . As described above, the fusing part 14 is thinly cut and formed in various plate thicknesses. With this, the fuse element 11 sets a current value, that is, a capacity at the time of fusing, such as 5A, 10A, and 15A. Each of the pair of conductive plates 12 is provided with through holes 15 at two locations, and the through holes 15 are stably held so that the fuse element 11 is not displaced in the housing 21 when a part of the housing 21 enters. To do.

  The housing 21 is formed of an insulating synthetic resin or the like, and stores a portion of the fuse element 11 excluding the terminal 13, that is, a part of the conductive plate 12 and a fusing part 14 therein, and the fuse element 11 is held at a predetermined position and protected from the outside. Note that in the partially cutaway view of FIG. 2, the description of the parallel oblique lines indicating the cut surface of the housing 21 is omitted. The same applies to the following partially broken views and the like.

Next, in order to form the multipolar fuse 1 by storing the plurality of fuse elements 11 formed as described above in one housing 21, it can be performed as follows.
As shown in FIG. 4, the housing 21 is formed of a housing body 22 that is formed in a rectangular parallelepiped shape and that opens on the upper side in FIG. 4, and a lid body 23 that closes the opening on the upper side of the housing body 22. . The housing body 22 is integrally formed with a plurality of holding holes 22a corresponding to the fuse element 11 to be attached. The holding hole 22a is formed in a recessed groove shape having a groove width slightly smaller than the plate thickness of the conductive plate 12 of the fuse element 11. When the conductive plate 12 of the fuse element 11 is forcibly press-fitted, Is elastically clamped.

  On the other hand, the lid body 23 is formed in a substantially flat plate shape, and a slit-like insertion hole 23 a through which the terminal 13 of the fuse element 11 is inserted is formed at a position facing the holding hole 22 a of the housing body 22. Further, a guide portion 23b is formed on the side facing the housing body 22 in the insertion hole 23a of the lid body 23 in order to guide the insertion of the terminal 13 of the fuse element 11 with a taper surface. . And although not shown in figure, it has the structure where both are crimped to each peripheral part of the said housing main body 22 and the cover body 23, and are integrated by means, such as a fitting, adhesion | attachment, or welding.

  Therefore, in order to store the fuse element 11 in the housing 21, first, the fuse elements 11 having the respective capacities are supplied to the housing body 22, and then sequentially press-fitted into the holding holes 22 a specified in advance for the capacities in the housing body 22. And insert it. Here, the supply of the fuse element 11 to the housing body 22 can be sequentially performed from a hopper or a storage container or the like by a conveying device such as a parts feeder. After the fuse element 11 is inserted, the terminal 13 of the fuse element 11 protrudes from the upper opening of the housing body 22 to the outside. Next, when the insertion of all the fuse elements 11 is completed, the lid body 23 of the housing main body 22 is inserted while the terminal 13 of the fuse element 11 is inserted into the insertion hole 23a using the guide portion 23b of the lid body 23 as a guide. Install in the top opening. In this state, the terminal 13 of the fuse element 11 protrudes from the lid 23 to the outside in the vertical direction. Therefore, the peripheral edge portion of the upper opening of the housing main body 22 and the peripheral edge portion of the lid body 23 are caulked and joined and integrated by means such as fitting, adhesion, or welding. Thereby, the multipolar fuse 1 in which the plurality of fuse elements 11 are stored in the housing 21 in an aligned manner is completed.

  In the multipolar fuse 1, the fuse element 11 is stored in the housing 21 divided into the housing main body 22 and the lid body 23. However, the fuse element 11 and the housing 21 are integrated by resin insert molding. It can also be formed. That is, although not shown, a plurality of holding recesses in which the terminals 13 of the fuse element 11 are inserted and held in a resin-molded cavity mold are provided, and a fuse having a capacity corresponding to the predetermined holding recess according to a circuit arranged for electrical equipment. The terminal 13 of the element 11 is inserted. The supply of the fuse element 11 to the holding recess of the cavity can be sequentially performed from the hopper or the storage container or the like by a transfer device such as a parts feeder, as in the case of the two-divided housing 21 described above. When the terminals 13 of the fuse element 11 are inserted into all the holding recesses of the cavity mold, the resin-molded core mold is advanced and clamped, and resin is injected from the gate to fill the mold. When the mold is opened after curing, the multipolar fuse 1 in which the portion excluding the terminal 13 of the fuse element 11 is integrally embedded in the housing 21 is completed.

  Although two types of manufacturing methods have been described above, the present invention is not limited to these manufacturing methods. When the former housing body 22 and lid 23 are integrated, only the relevant fuse element 11 can be replaced by removing the lid 23. On the other hand, in the case of the latter insert molding, the plurality of fuse elements 11 can be stably held in the housing 21.

  Here, normally, the fuse elements 11 having different capacities only differ slightly in thickness of the thinned fusing portions 14 and the outer shapes of the conductive plate 12 and the terminal 13 are not different. The fuse element 11 can be inserted in common in the holding hole 22a of the housing body 22 and the cavity-shaped holding recess of the resin molding. Therefore, even if the arrangement of the fuse element 11 is different for each circuit arranged in the electric system equipment, the housing body 22 and the resin-molded cavity mold need not be manufactured for each circuit on the load side and can be used in common. , Versatile.

  By the way, in the arrangement of the fuse elements 11, in FIG. 1 and FIG. 2, the fuse elements 11 are all arranged side by side at regular intervals in a fixed direction. However, the arrangement is not limited to this. It may be arranged vertically or diagonally, or the arrangement directions may be mixed. The number of fuse elements 11 stored in the housing 21 can also be set arbitrarily.

  The multipolar fuse 1 manufactured in this way can be mounted on the load side with a single touch in an assembly manufacturer of electrical equipment.

  Here, the multi-pole fuse 1 is a comparatively large-scale one in which a large number of fuse elements 11 are stored in one housing 21 in units of a plurality of circuits arranged in each electric system equipment such as lamps and wipers. However, it is also possible to use a small-scale one in which several fuse elements 11 are stored in one housing 21 in units of the respective electric equipments.

  The multipolar fuse 1 of FIG. 5 shows a small-scale example, and three fuse elements 11 are stored side by side in the housing 21. The capacities of the fuse elements 11 may be different from each other, or all may be the same. Such a small-scale multipole fuse 1 is housed in a single box or the like together with another small-scale multipole fuse, so that a relatively large-scale multipole fuse 1 as shown in FIGS. The pole fuse 1 can be used. In this way, when a plurality of small-scale multipolar fuses 1 are stored in a single box or the like as a unit, in order to mount the small-scale multipolar fuses 1 for each electrical equipment, the overall mounting frequency However, by appropriately combining a plurality of small-scale multi-pole fuses 1, it can be manufactured arbitrarily corresponding to a wide variety of medium- and large-scale multi-pole fuses 1. The degree of freedom in designing the multipolar fuse 1 is increased.

  By the way, the fuse element 11 of the multipolar fuse 1 of each of the embodiments described above is formed by punching and molding one conductive metal plate, and arranging three of them in a plane in the housing 21. As shown in FIG. 6, a metal plate having a narrow flat plate-like conductivity is bent into a substantially U shape, and a pair of conductive plates 12 formed on both sides are juxtaposed in a state where the planes face each other. You can also The fuse element 11 has a terminal 13 formed on each tip side of a pair of conductive plates 12 on both sides bent in a substantially U-shape, and the width dimension at the top of the substantially U-shaped bent portion is reduced so that the fusing portion 14 is formed. Is forming. The fuse element 11 can be further reduced in size by reducing the distance between the pair of conductive plates 12 to shorten the width dimension.

The fuse elements 11 formed in this way are stored in the housing 21 in a state of being juxtaposed in the vertical direction at intervals. Since the multipolar fuse 1 formed in this manner has three fuse elements 11 juxtaposed in the vertical direction, the multipolar fuse 1 shown in FIG. The shape is short and wide. Since the outer shape of the multipolar fuse 1 shown in FIGS. 5 and 6 is different as described above, it may be appropriately selected and used depending on the state of the space in which it is installed .

  In the multipolar fuse 1 in which a large number of fuse elements 11 are stored in one housing 21 as described above, when any one of the fuse elements 11 is blown by overcurrent, the entire multipolar fuse 1 is replaced. Is done. However, when the frequency of fusing is high to some extent, a multipolar fuse 1 may be provided in which a small number of fuse elements 11 that are easily blown are collected and separately stored in one housing 21. It is also possible to replace only the blown fuse element 11.

Next, the operation of the multipolar fuse 1 will be described.
Since the multi-pole fuse 1 can be freely stored in a predetermined position in the housing 21 using the manufactured fuse element 11 as it is, various fuse elements 11 having various capacities can be combined. Can be set arbitrarily, and the degree of freedom in designing the arrangement of the fuse elements 11 is great. For this reason, the multipolar fuse 1 can be manufactured flexibly corresponding to various electrical equipment.

  In addition, since a large number of conductive fuse elements 11 are stored in one housing 21, the multipolar fuse 1 can be reduced in size. For this reason, the space which various electrical equipment occupies can also be reduced.

  Further, since a fuse manufacturer assembles a plurality of fuse elements 11 which are semi-finished fuses into a single housing 21, after the fuse element 11 is manufactured, it is passed through a parts feeder, a conveyor, or the like. It can be conveyed and supplied directly to the housing 21 and assembled to the housing 21. Therefore, the conventional work of packing a single fuse element in which a single fuse element 11 is stored in a single housing is not required, and a packing container is not required, thereby reducing costs.

  In addition, the assembly manufacturer of the electrical equipment at the delivery destination needs only to attach the multipolar fuse 1 manufactured by the manufacturer of the fuse to the electrical equipment with a single touch, and to install a single fuse in the fuse box, junction block, etc. The work of inserting and assembling sequentially becomes unnecessary.

<Second embodiment>
Next, the multipolar fuse of 2nd embodiment of this invention is demonstrated based on FIG. 7 thru | or FIG. 7 shows the multipolar fuse of the second embodiment, FIG. 8 is a circuit diagram of the multipolar fuse of the second embodiment, and FIG. 9 shows another multipolar fuse of the second embodiment .

  In FIG. 7, the multipolar fuse 2 stores a total of 13 fuse elements 11, which are the same as the multipolar fuse 1 of the first embodiment, arranged in parallel at equal intervals in a single housing 21. Further, each fuse element 11 is electrically connected by connecting the input side terminals 13 adjacent to each other by a bus bar 31 every predetermined number. In FIG. 7, the adjacent fuse elements 11 are connected in units of 3, 3, 1, and 6 in order from the left end. That is, the multipolar fuse 2 of the second embodiment is different from the first embodiment in that the fuse elements 11 are arranged not vertically but vertically, and the terminal 13 on the input side of the fuse element 11 is The difference is that the bus bars 31 are connected every predetermined number.

  Here, the bus bar 31 is formed in an elongated flat plate shape made of a copper alloy, and a holding part 32 that is cut out in a substantially Ω shape at a position corresponding to the fuse element 11 on one long side, and the holding part 32. A notch 33 formed in a substantially inverted U shape is formed at regular intervals between them. The front end portion of the sandwiching portion 32 of the bus bar 31 is formed with a pair of opposing pressing portions 32a formed in an arc shape, and the gap between the pair of pressing portions 32a is larger than the thickness of the terminal 13 of the fuse element 11. When the terminal 13 is press-fitted into the gap, the pressing portion 32a elastically expands toward the side notch 33, and the terminal 13 enters the holding portion 32. After that, the pair of pressing portions 32a elastically press and hold both sides of the terminal 13 so as to be sandwiched. As a result, the input side terminal 13 of the fuse element 11 is connected to the bus bar 31, and the adjacent input side terminals 13 of the fuse element 11 are electrically connected to each other with the predetermined number of fuse elements 11 as a unit via the bus bar 31. Connected to.

  In the multipolar fuse 2 of the second embodiment, a large number of 13 fuse elements 11 in FIG. 7 are divided into a plurality, and the terminals 13 on the input side of the fuse elements 11 are divided into 1 to several pieces for each section. Are electrically connected by the bus bar 31, and the classification is arbitrarily set for each electrical equipment or for other related classification. Within this section, the plurality of fuse elements 11 have a configuration in which the input side terminal 13 is shared by one and the output side terminal branches. If this is shown in a circuit diagram, it becomes as shown in FIG. FIG. 9 shows a multi-pole fuse 2 by another division, and if this is shown in a circuit diagram, it is as shown in FIG.

  As described above, in the multipolar fuse 2 of the second embodiment, a large number of fuse elements 11 are divided into a plurality of parts, and the terminals 13 on the input side of the plurality of fuse elements 11 in the section are shared by connecting the bus bars 31. Therefore, the fuse circuit is simplified, and a large number of fuse elements 11 are easily grasped systematically.

  In the embodiment shown in FIGS. 7 and 9, the input side terminal 13 of the fuse element 11 is electrically connected by being sandwiched by the sandwiching portion 32 of the bus bar 31. For example, the terminal 13 and the bus bar 31 can be connected by screws. Further, the shape of the bus bar 31 is not limited to an elongated flat plate shape.

<Third embodiment>
Next, the multipolar fuse of 3rd embodiment of this invention is demonstrated based on FIG. The third embodiment shown in FIG. 10 corresponds to the first and second aspects.

  In FIG. 10, the multipolar fuse 3 includes a plurality of fuse units 4 each having one fuse element 11 stored in one housing 21, and three in FIG. The case 34 is housed. The fuse unit 4 is the same as the fuse 41 which is a conventional blade-type fuse.

  The case 34 is formed of a synthetic resin and has a rectangular box shape having an insertion opening 35 on the upper surface. The housing 21 of the three single fuses 4 is closely accommodated therein, and the bottom surface 36 A terminal hole 37 through which the terminal 13 of the fuse unit 4 is inserted is provided. The case 34 is formed so that the distance between the opposing side walls approaches the bottom surface, and the width of the case 34 below the inner space is slightly smaller than the width of the housing 21 of the fuse unit 4. By forcibly pushing the fuse unit 4 through the insertion opening 35, the fuse is elastically sandwiched in the case 34 and stably held. Therefore, the multi-pole fuse 3 can be easily manufactured by simply inserting the three fuses 4 from the insertion opening of the case 34. The case 34 contains three fuses 4 alone, but the number is not limited to this.

  In the case of this multipolar fuse 3, since the fuse elements 11 are individually stored in the housing 21 and further accommodated in the case 34, the number of the housings 21 is large, so that the multipolar fuse 1 of the first embodiment is used. Although it is larger than the multipolar fuse 2 of the second embodiment, since the plurality of fuses 4 are tightly housed in a chain in the case 34, the conventional fuse 41 is simply put one by one in the fuse box. It is small compared with what was stored in etc. Further, the multipolar fuse 3 can be formed by using the same single fuse 4 as the conventional blade-type fuse as it is.

  When any one fuse 4 is blown by overcurrent, only the fuse 4 may be replaced.

Next, another multipolar fuse 3 of the third embodiment is shown in FIGS.
A multi-pole fuse 3 shown in FIG. 11 is one in which three fuses 4 shown in FIG. 12 are arranged in a chain in a case 34 and arranged in a chain. Here, the fuse element 11 constituting the fuse unit 4 is the same as the fuse element 11 of the multipolar fuse 1 shown in FIG. Similarly to the case 34 of FIG. 10, the case 34 has an insertion opening 35 on the upper surface, and the terminal 13 of the fuse 4 protrudes from the bottom. A window 39 is provided at the top of the fuse unit 4.

  Here, the case 34 is provided with a thin plate-like fitting convex portion 38 a on the two side surfaces 38 in the vertical direction along the side surface 38, and on the opposite sides of the two side surfaces 38. A narrow groove-shaped fitting recess 38 b is formed in the vertical direction along the wall surface 38 at a position opposite to the fitting protrusion 38 a on the side surface 38. When the plurality of small-scale multipolar fuses 3 are stored in a single box or the like in the form of a chain by the fitting convex portion 38a and the fitting concave portion 38b, the adjacent small-scale multipolar fuses 3 are fitted together. The convex portion 38a and the fitting concave portion 38b are fitted and positioned, and the small-scale multipolar fuses 3 are prevented from being displaced from each other inside a single box or the like, and held more stably. . Note that the fitting convex portion 38a and the fitting concave portion 38b may be provided in the same manner in the case 34 shown in FIG. 10, and a small number of fuse elements 11 of the first embodiment are stored. The pole fuse 1 and the like may be provided similarly.

  Since this multipolar fuse 3 has three fuses 4 juxtaposed in the vertical direction, the multipolar fuse 3 shown in FIG. 10 is formed in a flat shape, whereas the overall length is short and the width is short. It has a large form. Since the outer shapes of the two are different from each other as described above, they may be appropriately selected and used depending on the situation of the space to be mounted.

  Although not shown, the case 34 is formed by a box-shaped case body having an opening on the top surface and an insertion hole for the terminal 13 on the bottom surface, and a lid for closing the opening on the top surface of the case body. The case body and the lid body may be connected to each other by a thin hinge portion so as to be freely opened and closed. In the case of this case, a plurality of fuses 4 are juxtaposed in a chain in the case main body, and then the lid body is closed and the ends are engaged and welded together by means such as welding. .

  By the way, the fuse element 11 of each of the above embodiments shows that the terminal 13 protrudes from the bottom surface of the housing 21 in the vertical direction and is inserted into the female terminal portion on the load side as it is. As shown in FIG. 13, the fuse element 11 in the fuse is configured such that the terminal 13 is bent at right angles in opposite directions to each other on the end side of the conductive plate 12, and the solder 52 is reflowed on the circuit board 51. In this case, the same can be applied. That is, a plurality of fuse elements 11 shown in FIG. 13 are stored in one housing to form a multipolar fuse, or a plurality of fuses each having one fuse element 11 stored in one housing. Can be accommodated in one case to form a multipolar fuse.

  Further, the housing 21 or the case 34 of each of the above embodiments is formed of a transparent body or a semi-transparent body, or if a window portion is formed, the number and arrangement state of the internal fuse elements 11 or the single fuse 4 can be changed to the outside. Can be confirmed.

  Furthermore, although the multipolar fuse of each said embodiment has shown what was applied to the circuit arranged in the electric system equipment about vehicles, when implementing the present invention, it is not restricted to this, The present invention can be similarly applied to circuits arranged for loads such as home appliances.

It is a perspective view which shows the multipolar fuse of 1st embodiment of this invention. The multi-pole fuse of FIG. 1 is shown, (a) is a partially broken plan view, and (b) is a partially broken front view. The fuse element of FIG. 2 is shown, (a) is a top view, (b) is a front view, (c) is a side view. It is a partially broken front view which shows the method of manufacturing the multipolar fuse of FIG. The other multipolar fuse of 1st embodiment of this invention is shown, (a) is a top view, (b) is a front view. The another multipolar fuse of 1st embodiment of this invention is shown, (a) is a top view, (b) is a front view, (c) is a side view. The multipolar fuse of 2nd embodiment of this invention is shown, (a) is a partially broken plan view, (b) is a partially broken front view, (c) is a partially broken side view. The circuit diagram of the multipolar fuse of 2nd embodiment of this invention is shown, (a) is the circuit diagram of the multipolar fuse of FIG. 7, (b) shows the circuit diagram of the multipolar fuse of FIG. It is a partially broken top view of another multipolar fuse in 2nd embodiment of this invention. The multipolar fuse of 3rd embodiment of this invention is shown, (a) Top view, (b) is sectional drawing by the AA cut line of (a). The other multipolar fuse of 3rd embodiment of this invention is shown, (a) is a top view, (b) is a front view, (c) is a partially broken side view. FIG. 11 shows the fuse of FIG. 11, (a) is a plan view, (b) is a front view, and (c) is a side view. 3A and 3B show another fuse element, wherein FIG. 3A is a front view and FIG. 3B is a side view. The conventional blade-type fuse is shown, (a) is a front view, (b) is a side view.

Explanation of symbols

1, 2, 3 Multipolar fuse 4 Fuse unit 11 Fuse element 12 Conductive plate 13 Terminal 14 Fusing part 21 Housing 31 Bus bar 34 Case

Claims (7)

A fuse element having a pair of conductive plates juxtaposed at a predetermined interval; a terminal formed at one end of each of the conductive plates; and a fusing portion provided between the pair of conductive plates; and an insulating property A fuse unit having a housing for storing the fuse element in a state where the terminal is exposed, and
A plurality of the fuses alone, with all of the terminals projecting to the outside, and a case for housing them integrally in a chain-like manner,
The multi-pole fuse according to claim 1, wherein each of the fuses is arranged in the case freely corresponding to a circuit on a load side. 2. The multipolar fuse according to claim 1 , wherein fuses of various capacities are freely arranged in the case in correspondence with a circuit on a load side. 3. The multipolar fuse according to claim 1, wherein the pair of conductive plates of the fuse element is formed of a flat plate and juxtaposed in a state where the planes face each other. Before SL fuse alone, multipolar fuse according to any one of claims 1 to 3, characterized in that it is accommodated in an exchangeable with said casing. Before SL fuse alone, multipolar fuse according to any one of claims 1 to 4, characterized in that they are arranged in tandem on the case. Before SL fuse alone, multipolar fuse according to any one of claims 1 to 4, characterized in that it is arranged side by side on the case. Before SL fuse alone, multipolar fuse according to any one of claims 1 to 6, characterized in that are arranged at equal intervals on the case.

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