JPS6231466B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides a multi-channel terminal that is configured separately from the input terminal and can be freely selected and used according to the required number of terminals without waste, which can significantly improve productivity. This relates to a polar type fuse element.

[Conventional technology and problems]

The two most commonly used types of fuses to prevent burnout due to overcurrent and overload in various automotive electrical components and wiring harnesses are blade-type fuses and multi-polar fuses that have a common branch. It is.

As shown in FIGS. 7 and 8, the blade-type fuse has a fusing portion 3 with a very small cross-sectional area that connects the upper portions of opposing end surfaces of a pair of opposing male terminals 1, 1 through bulging portions 2, 2. The fuses have a substantially H-shaped shape in which they are connected to each other, and are formed integrally by punching from a fuse metal plate, and are attached to a housing 4 made of an insulating synthetic resin.

The fuse element of the multipolar fuse is integrally formed by punching out of a metal plate as shown in FIGS. 9 and 10.

That is, the multipolar fuse element a shown in FIG.
It consists of a branching link 6 connected to the connecting link 5 by a vertical connecting piece 5a, and input terminals 7 and a plurality of fuse elements 8 protruding from the link 6 at regular intervals. One end of the fuse element 8 is connected to the branch link 6 by a fusing part 8a having a small cross-sectional area, and the other end is connected to the adjacent input terminal 7 and the fuse element 8 by a horizontal connecting piece 8b.

In other words, the conventional multi-polar fuse element a has a structure in which a branching link 6 coupled to an input terminal 7 is connected to the fusing portions 8a of a large number of fuse elements 8, and the sequence is input terminal→branching portion→fuse portion. are integrated. Then, by cutting the connecting link 5, the branching link 6, and the horizontal connecting piece 8b at the X, Y, and Z portions, a single-pole or multi-pole type fuse element such as one, two, or three poles can be obtained. .

In order to connect the multi-polar fuse element a to an electronic device, etc., a connecting link 9 is shown in FIG.
A large number of output terminals 10 coupled to the input terminal 7
When connected to the fuse element 8 in an overlapping manner, it becomes a plug-in type multipolar fuse.

The blade-shaped fuse described above can be continuously molded in a chain both vertically and horizontally, but since a pair of opposing male terminals form an H-shaped structure, it is structurally only one.
They stand alone as individual fuses and cannot be used in branch circuits with a common pole.

On the other hand, in the multipolar fuse element a, the required number of poles can be freely selected by changing the cutting parts of the connecting link 5, the branching link 6, and the horizontal connecting piece 8b.
If a fuse element with a small number of poles is required, a large number of other fuse elements arranged in series are wasted.

Further, since the configuration is such that a plurality of fuse elements 8 are arranged in series on the left and right sides of one input terminal 7, the number of poles of the fuse element 8 is limited to the number of poles commensurate with the current capacity of the input terminal 7.

[Means for solving problems]

In the present invention, a large number of fuse elements held in parallel by a single connecting link with connecting pieces interposed between them are integrally formed by punching from a fuse metal plate, and the required number of poles can be increased by dividing the connecting link. A multi-polar fuse element is obtained, and an input terminal having a branch portion corresponding to the required number of poles, which is configured separately from the multi-polar fuse element, is applied.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a multipolar fuse element A. This fuse element A includes Cu, Ti, Al, Mg,
The fusing part is cut from a fuse metal plate material made of an alloy such as Zn to an element thickness using a cutting wheel or a milling blade, and then punched to form a chain shape. A large number of fuse elements 14 are arranged in parallel at predetermined intervals via vertical connection pieces 15. Note that the connecting portion that partially connects a large number of fuse elements 14 and holds them in a planar shape is not limited to the connecting link 13 or the vertical connecting piece 15, but may also include, for example, a horizontal connecting piece as shown in FIG. You may also use it.

In the center of the fuse element 14, a fusing part 14a having a small cross-sectional area is provided in an S-shaped bent state.
A through hole 14b is bored at both ends thereof.
The bent shape of the fusing portion 14a can be selected from various shapes such as a rectangular wave shape, an N-shape, and a wavy shape, as shown in FIG. 2 A to C.

3 to 6 are perspective views showing a multipolar fuse element stamped from a thin fuse metal plate having the same plate thickness as the fuse element, and its assembled state.

A chain-shaped output terminal C and a reinforcing body D are attached to a thin multi-polar fuse element B shown in FIG.

This multipolar fuse element B has a large number of fuse elements 18 having fusing portions 18a and through holes 18b, which are arranged in a chain in parallel on a connecting link 16 via a vertical connecting piece 17, similar to the above-mentioned element A. The illustrated one shows a three-pole type fuse element B in which the connecting link 16 is separated).

The chain-shaped output terminals C are integrally formed by punching out of a metal plate material having an appropriate thickness to form a normal male tab terminal, and a large number of them are connected to one side of the connecting link 19 via a vertical connecting piece 20. Output terminal 21 of
are arranged in parallel (the illustrated one shows a three-pole type output terminal 21 in which the connecting link 19 is separated).
The output terminal 21 is spaced at the same interval as the fuse element 18, and has an external force absorbing piece 21a projecting downward from the side surface of its tip end. Note that these output terminals 21
may be connected to one end of the fuse elements 14, 18, which is particularly effective when cutting a metal plate material by milling or the like to form a fusing section as shown in FIG.

The reinforcing body D is integrally molded with an insulating thermoplastic resin such as polyethylene or polyamide resin, and is provided between the supporting plates 23 and 24 for the opposite ends of the fuse elements 14 and 18.
A partition wall 22 is provided to be inserted between the fusing portions 14a and 18a of the through holes 14 and 18.
It has a structure in which a fuse fixing protrusion 25 that is inserted into b is protruded. One support plate 24 is formed to have an L-shaped cross section, and is provided with an insertion hole 24a into which the external force absorbing piece 21a of the output terminal 21 is inserted.

These are assembled as follows.

In FIG. 3, first, the output terminal 21 is superimposed on the lower surface of one end of the fuse element 18, and connected by soldering, welding, laser beam, etc. Next, the fuse fixing protrusion 25 of the reinforcing body D is passed through the through hole 18b of the fuse element 18, while the output terminal 21
The external force absorbing piece 21a is inserted into the insertion hole 24a of the support plate 24.
to fit into. Finally, the protrusion 25 protruding from the through hole 18b is heated and melted using a jig (not shown), and the reinforcing body D is welded and fixed to the fuse element 18. Note that the fuse fixing protrusion 25 may not only be fixed by thermal melting, but also may be locked and fixed by forming the tip into an arrowhead shape.

Thus, the multipolar fuse element B has the reinforcing body D
is reinforced, and the output terminal 21 is assembled.

FIG. 4 shows the assembled state of a chain of input terminals E formed separately from the multipolar fuse element.

This chain-shaped input terminal E is constructed by arranging a large number of input terminals 28 in parallel on one side of a connecting link 26 via a vertical connecting piece 27, similarly to the chain-shaped output terminal C described above. (shows three input terminals 28 obtained by dividing the connecting link 26). Each input terminal 28
As shown in FIG. 5, a branch 29 is formed at one end of the branch 29 by folding the extending end thereof into a U-shaped cross section, and a seat 29a thereof extends in the direction of the input terminal 28. This seat 29a is connected to the fuse element 14,
18, which has a receiving width 2
9b is formed in accordance with the number of poles of the multipolar fuse to be manufactured. In the illustrated example, the width is such that three-pole fuse elements 18 are connected in parallel, and the input terminal 28 is located approximately at the center of the seat 29a. There are three fuse elements 1 on this catch 29a.
By overlapping the other ends of the fuses 8 and connecting them by soldering or the like, a plug-in type three-pole fuse B' shown in FIG. 6 is obtained. Thus, the chained input terminals E are connected to branch portions 29 whose seat widths 29b have different dimensions in accordance with the number of poles of the multipolar fuse element.
A single input terminal 28 having a current capacity corresponding to the branch portion 29 is separately manufactured.

In addition, the above-mentioned connecting links 13, 16, 19 and 2
6 serves as a feeding band in the fuse element assembly process, and after assembly, if necessary, the fuse elements 14, 18, and the output The terminal 21, input terminal 28, etc. are each independent.

〔effect〕

In the present invention, a large number of fuse elements held in parallel by a single connecting link with connecting pieces interposed between them are integrally formed by punching from a fuse metal plate material, and the required number of fuses can be formed by dividing the connecting link. Since the fuse element can be obtained by selectively applying an input terminal having a branch part corresponding to the required number of poles, which is separately configured, there is no need to waste a large number of fuse elements formed by stamping. productivity can be significantly improved.

[Brief explanation of the drawing]

1 to 6 show embodiments of the present invention, in which FIG. 1 is a perspective view of a multipolar fuse element A, FIGS. 3 and 4 are exploded perspective views showing the assembled state of another multipolar fuse element B, FIG. 5 is an enlarged perspective view of the input terminal, and FIG. 6 is a perspective view of the multipolar fuse B'. 7 to 10 show conventional examples, FIG. 7 is a perspective view of the main parts of a blade-type fuse, FIG. 8 is a perspective view of the entire blade-type fuse, and FIG. 9 is a perspective view of a multipolar fuse element. FIG. 10 is a plan view of the output terminal. A, B...Multi-polar fuse element, B'...Multi-polar fuse, C...Chained output terminal, D...Reinforcement body, E...Chained input terminal, 13, 16, 1
9, 26... Connection link, 14, 18... Fuse element, 14a, 18a... Fusing part, 14b, 1
8b...through hole, 21...output terminal, 21a...
External force absorbing piece, 22... Partition wall, 23, 24... Support plate, 24a... Insertion hole, 25... Fuse fixing projection, 28... Input terminal, 29... Branch part, 29
a...Ukeza.

Claims (1)

[Scope of Claims] 1. A multi-polar fuse element whose one end is connected and fixed in parallel to a branch part corresponding to the required number of poles provided at one end of an input terminal, the fuse element having a fusing part in the center. and,
A single connecting link holding one end of each fuse element in parallel at a predetermined interval with a connecting piece interposed therebetween is integrally formed by punching from a fuse metal plate material, and by changing the cutting part of the connecting link, A multi-pole type fuse element, characterized in that a fuse element having a required number of poles corresponding to the branch portion of the input terminal is obtained.