JP2000090808A - Multi-electrode-type fuse element having layer short- circuit judgment function, fuse, and manufacture of fuse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate installation of a judgment part (judgment circuit) for each load by providing a judgment part for a fuse element itself. SOLUTION: In this element, three or more conductive terminals 2a, 2b,... arranged on the same plane are respectively interconnected at the upper parts in the conductive state through fusing parts 1,... according to conductive capacities of fuses, and a pair of right and left multi-electrode-type terminals 2 with connecting pieces 3a, 3b,... extended from the upper parts of the conductive terminals 2a, 2b,... are symmetrically arranged with a constant interval. Between the both multi-electrode-type terminals 2, 2, a male terminal group 4 comprising male terminals 4a, 4b, 4c for power supply, a plurality of cut-off signals, and earth are arranged in parallel with the both multi-electrode-type terminals 2, 2. The upper parts of the male terminal group 4 and the connecting pieces 3a, 3b,... in the upper parts of the plurality of conductive terminals 2a, 2b,... are interconnected through a judgment portion 8 for judging layer short-circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug-in type multi-pole type fuse having a rare short judging function mainly used for automobiles.

[0002]

2. Description of the Related Art Conventionally, blade-type fuses used in a large number of electric systems of automobiles often have a slow blow characteristic (the fuse does not blow due to an instantaneous overcurrent, and the overcurrent continues for a certain period of time). In this case, that is, when there is a danger such as a fire if the overcurrent continues, a function to prevent the danger is provided.

[0003] For this reason, the fuse is blown at the time of a dead short, but a continuous short short enough to prevent the fuse from blowing or an intermittent short for a short time at most (hereinafter, these shorts are referred to as "rare shorts"). Since the fuse is not blown in the area, a vehicle fire may occur if this state continues.

As a means for solving this condition, the present inventor has previously developed and applied for a fuse with a sensor for detecting a rare short circuit (Japanese Patent Application No. 9-303541).
As a further improvement of this sensor-equipped fuse, as shown in FIG. 9, a thin-walled fusing portion between upper halves of a pair of left and right conductive terminals 2a and 2b arranged on the same plane according to the current carrying capacity of the fuse. 1 and thin connecting pieces 3a, 3b below the thin fusing portion 1
Are protruded inward, and a thin power male terminal 4a and a thin cutoff male terminal 4 are provided between the lower halves of the conductive terminals 2a and 2b and below the connection pieces 3a and 3b.
b and three thin male terminals for ground 4c are independently arranged in parallel, and the three thin male terminals 4a,
A fuse element with a rare short judgment function is connected between the thin pieces 4b, 4c and the connection pieces 3a, 3b through a judgment section 8 for judging a rare short, and the thin male terminals 4a, 4a, A fuse F ′ having a function of judging a rare short circuit in which the upper portion of the upper end of each of 4b and 4c is held by a heat-resistant and insulating housing 15 has been developed and filed (Japanese Patent Application No. 10-90866).

As shown in FIG. 10, a fuse F ′ with a rare short-circuit judging function is applied to a plurality of loads A,
B and C are arranged in parallel with one relay 17 installed immediately after the battery 16, and when a rare short circuit occurs in any of the loads A, B and C, the entire circuit is cut off by the relay 17. To be incorporated into the electrical wiring of a car.

As shown in FIG. 11, fuses F 'having a rare short determination function are provided for each of a plurality of loads A, B, and C, and the same number of relays 17a, 17b,
It is arranged in parallel with the pair 17c, and is incorporated in the electric wiring of the automobile so that when a rare short circuit occurs in any of the loads A, B, and C, only the circuit in which the short circuit occurs is cut off.

[0007]

The fuse F 'with the function of judging a rare short circuit in the above-mentioned application includes a pair of conductive terminals 2.
Since a judgment unit 8 for judging a rare short is built in between a and 2b, and only a rare short can be judged for one load by one fuse F ', a load is set corresponding to each load. It is necessary to incorporate fuses F ′ having a rare short determination function provided with the determination units 8 into the electric wiring.

[0008]

According to the present invention, a plurality of pairs of conductive terminals 2a, 2b,... Are connected to one judging unit 8 to form one multi-pole type fuse having a rare short judging function.
The above-mentioned problem has been solved by making it possible for a single determination unit to handle a plurality of loads.

That is, the first aspect of the present invention is that the upper portions of three or more conductive terminals 2a, 2b,... Arranged on the same plane are electrically connected at the fusing portions 1,. And the respective conductive terminals 2a, 2b,.
Are arranged symmetrically with a fixed pair of left and right terminals, with connecting pieces 3a, 3b,.
A male terminal group 4 composed of male terminals 4a, 4b, and 4c for power supply, a plurality of cutoff signals, and ground is connected between the two multipolar terminals 2 and 2 in parallel with the two multipolar terminals 2 and 2. , And the upper part of the male terminal group 4 and the upper connection pieces 3a, 3b,... Are connected via a judging unit 8 for judging a rare short. This is a multi-pole type fuse element with a rare short judgment function.

A second aspect of the present invention is that thin upper and lower portions 1, 1 'corresponding to the current carrying capacity of the fuse are provided between the upper portions of the three conductive terminals 2a, 2b, 2b' arranged on the same plane. The three conductive terminals 2a, 2
b, 2b ', a multipolar terminal 2 in which thin connecting pieces 3a, 3b, 3b' are respectively extended from different positions on the upper side, and three conductive terminals similarly arranged on the same plane. The upper portions of 20a, 20b and 20b 'are connected in a conductive state by thin-walled fusing portions 10 and 10' corresponding to the current carrying capacity of the fuse, respectively, and the three conductive terminals 20a and 20b 'are connected.
b, 20b 'from a different position on the top of the thin connecting piece 3
0a, 30b, and 30b ′ are symmetrically arranged with a pair of left and right multipole terminals 20 at a predetermined interval. Power supply male terminals 4a each having a thin connecting portion 5a, and cut-off signal male terminals 4b, 4b ', 40b, 40 each having a thin upper connecting portion 5b, 5b', 50b, 50b '.
b ′ and a male terminal group 4 composed of six grounding male terminals 4c each having a thin connection portion 5c at the upper part are arranged in parallel with the two multipolar terminals 2 and 20, and each of the six male terminals Each connection part 5a, 5b, 5b ', 50b, 50 on the terminal
b ', 5c and thin connecting pieces 3a, 3b, 3b', 30a, 30b, 30b 'above the six conductive terminals are connected via a judging unit 8 for judging a rare short. This is a multi-pole type fuse element with a short-circuit judgment function.

A third aspect of the present invention is a multi-pole type fuse element with a rare short judgment function according to the second aspect.
Book male terminals 4a, 4b, 4b ', 40b, 40
b ', 4c, connecting portion 5a above power supply male terminal 4a
Is connected to the power supply terminal 8a of the judgment circuit 8, and the connection portion 5b above the male terminal 4b for the cutoff signal is connected to the relay 17 of the judgment portion 8.
is connected to the abnormality determination output terminal 8b for the terminal a, and the connection portion 5c above the male terminal for ground 4c is connected to the ground terminal 8 of the determination portion 8.
c, and the thin connection pieces 3a, 3b, 3b 'on the upper portions of the conductive terminals 2a, 2b, 2b' are connected to the input terminals 8e, 8d, 8d 'of the judging unit 8, respectively. Connecting portions 5b ', 5 on the upper portions of the male terminals 4b', 40b, 40b '
0b, 50b 'are respectively connected to the relays 17a, 17a,
Anomaly judgment output terminals 8b ', 80 for 17b, 17c
b, 80b 'and the conductive terminals 20a, 20b, 20
b 'upper thin connecting pieces 30a, 30b, 30b'
To the input terminals 80e, 80d, 80
d ', and each of the six male terminals 4a, 4b, 4
b ', 40b, 40b', 4c and the six conductive terminals 2a, 2b, 2b ', 20a, 20b, 20b'.
Of the heat-resistant / insulating housing 15
This is a multi-pole type fuse with rare short judgment function held in.

A fourth aspect of the present invention is that the two multi-pole type fuse elements having the rare short-circuit judging function according to the second aspect of the present invention are arranged such that each of the multi-pole type terminals 2, 20 and the male terminal group 4 are on the same plane. The male terminals 4a, 4b, 4b ', 40b, 4 of the multi-pole type fuse are arranged so as to face outward.
0b 'and 4c, the connecting portion 5 above the power supply male terminal 4a.
is connected to the power supply terminal 8a of the judgment circuit 8, and the connection portion 5b above the male terminal 4b for the cutoff signal is connected to the relay 1 of the judgment portion 8.
7a, the connection part 5c on the upper part of the earthing male terminal 4c is connected to the earth terminal 8c of the judgment part 8, and the thin connecting pieces 3a, 3a on the upper part of the conductive terminals 2a, 2b, 2b '. 3b, 3b 'are connected to the input terminals 8e, 8d, 8d' of the judging unit 8, respectively, and the connecting parts 5b ', upper parts of the other male terminals 4b', 40b, 40b 'are respectively connected.
50b and 50b 'are respectively connected to the relays 17 of the judgment circuit 8.
a, 17b, 17c abnormality determination output terminals 8b ',
80b, 80b 'and the conductive terminals 20a, 20b,
20b 'upper thin connecting pieces 30a, 30b, 30
b ′ are input terminals 80e, 80d, 8
0d ', the upper part of each male terminal 4a, 4b, 4b', 40b, 40b ', 4c of the two multi-pole type fuse elements and each conductive terminal 2a, 2b, 2b', 20a, 20.
This is a multi-pole type fuse having a rare short-circuit judging function in which the upper portion of the b and 20b 'and the judging section 8 are held by one heat-resistant and insulating housing 15.

According to a fifth aspect of the present invention, there is provided a multi-pole type fuse element with a rare short judging function according to the second aspect, wherein the multi-pole type terminals 2 and 20 and the male terminal group 4 are respectively directed outward. With a rare short judgment function, which is bent downward at a substantially right angle to form a plug-in terminal, or bent downward at a substantially right angle and then horizontally bent outward at the tip. Multi-pole type fuse.

According to a sixth aspect of the present invention, there is provided a method for continuously manufacturing a multi-pole type fuse having a rare short-circuit judging function according to the third aspect of the present invention, wherein one side, the center, or both sides are arranged along the longitudinal direction. When a long fuse material 18 formed of a single conductive plate having a thin portion 19 having a predetermined width is punched to a predetermined length while being intermittently transferred, the conductive terminals in the pair of left and right multipolar terminals 2 and 20 are used. The male terminal group 4 composed of 2a, 2b, 2b 'and 20a, 20b, 20b' and six intermediate male terminals 4a, 4b, 4b ', 40b, 40b', 4c is From the other side portion or both side portions or the center portion, simultaneously punching in the direction orthogonal to the longitudinal direction except for the non-punched portion 18a at the other side edge or both side edge or the center portion, and then the double multipolar terminal 2,20 upper part Thin-walled fusing sections 1, 1 'and 1
0, 10 'and the thin connecting portions 3a, 3b, 3b' and 30a, 30b, 30b 'together with the thin connecting portions 5a, 5b, 5b', 50b,
50b 'and 5c are thinned portions 19 of the elongated fuse material 18.
From the male terminal group 4 at the same time or in several times, and the thin connecting portions 5a, 5b, 5b ', 50b,
50b ', 5c and thin connecting pieces 3a, 3b, 3b', 30a, 30b, 30 above the multipolar terminals 2, 20.
b ′ is connected via a judging unit 8 for judging a rare short, and the upper part of the male terminal group 4 and the upper parts of the two multipolar terminals 2 and 20 and the judging unit 8 are connected to one heat-resistant After being held so as to be wrapped in the insulative housing 15, the other side edge or both side edges of the long fuse material 18 connecting the lower ends between the terminals or the non-punched portion 18 a at the center portion
This is a continuous manufacturing method of a multi-pole type fuse having a rare short judgment function of punching out and separating.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1A and 1B show a multi-pole type fuse with a rare short judgment function according to the present invention, wherein FIG. 1A is a front view in the center vertical section, and FIG. 1B is a cross-sectional view of FIG.

The multi-pole type fuse element with a rare short judgment function (hereinafter simply referred to as "fuse element") f according to the present invention has the form shown in FIGS. 1A and 1B. In the figure, reference numeral 2 denotes a left multipolar terminal.
Are three conductive terminals 2a, 2 arranged on the same plane.
b, 2b 'are electrically connected to each other by thin-walled fusing portions 1, 1' corresponding to the current-carrying capacity of the fuses, and at different positions on the three conductive terminals 2a, 2b, 2b '. From the thin connecting pieces 3a, 3b, 3b 'respectively.
Is projected to the right side.

In the multipolar terminal 2, the conductive terminal 2
a, 2b and between the conductive terminals 2a, 2b '.

In the figure, reference numeral 20 denotes a right-side multi-pole terminal. This multi-pole terminal 20, like the left-side multi-pole terminal 2, has three conductive terminals 20a, 20b, 2
The upper portions of the three conductive terminals 20a, 20b, and 20b 'are connected to each other at thin portions 10 and 10' corresponding to the current carrying capacity of the fuse. Connection pieces 30a, 30b, 30
b ′ is extended to the left side, and is symmetrical to the multipolar terminal 2 on the left side.

Also in this multipolar type terminal 20, between the conductive terminals 20a and 20b and between the conductive terminals 20a and 20b ', it plays a role of a fuse for two loads.

In the figure, reference numeral 6 denotes a punched hole for locking with the housing 15 provided above each conductive terminal.

In the figure, reference numeral 4 denotes a group of narrow-width male terminals arranged at the center, and this male terminal group 4 comprises one power supply male terminal 4a and four cutoff signal male terminals 4b, 4b '. , 40
b, 40b 'and one male terminal 4c for grounding, and the upper part of each male terminal is formed in thin-walled connection parts 5a, 5b, 5b', 50b, 50b 'and 5c, respectively.

As shown in FIG. 2, four male terminals 4b, 4b ', 40b, 40b' for the cutoff signal in the male terminal group 4 have four loads A, B, C, D (see FIG. 2). 4) corresponding to each relay 17a, 17b, 1
7c and 17d.

In the figure, reference numeral 7 denotes a projection for locking with the housing 15 provided above each male terminal.

In the figure, reference numeral 8 denotes a judgment unit at the upper center, and this judgment unit 8 has four comparison units A, 4 having the same configuration as shown in FIG.
B, C, and D are provided independently of each other, and each of the comparison units is composed of a comparison circuit 21, a timer 22, a counter memory 23, and an abnormality determination circuit 24, as indicated by a comparison unit A in the figure. The input terminals 8e and 8d of the comparison circuit 21 are connected to the thin connecting pieces 3a and 3b on the conductive terminals 2a and 2b, respectively.
Is connected to the thin connecting portion 5b above the male terminal 4b for cutoff signal, the power supply terminal 8a of the judging unit 8 is connected to the thin connecting portion 5a above the male terminal 4a for cutoff signal, and the ground terminal 8c is connected to the ground terminal 8c. It is connected to the thin connecting portion 5c on the upper part of the earthing male terminal 4c.

In this comparison section A, (a) the thin connection pieces 3a, 3
The signal (potential difference) detected at b is taken in and the comparison circuit 2
Compare with the abnormal level stored in 1. (B) The timer 22 compares the presence or absence of an abnormality at regular intervals, counts the number of signals exceeding the abnormality level, and stores the number in the counter memory 23. (C) The abnormality determination circuit 24 looks at the count number within a certain period of time. If the count value is equal to or greater than the predetermined count number, it is determined that the abnormality is abnormal.

Therefore, in the connection state described above, the comparison unit A is for one load A between the conductive terminals 2a and 2b, and the comparison unit B is for one load B between the conductive terminals 2a and 2b '. However, for one load C between the conductive terminals 20a and 20b, the comparison unit C
For one load D between a and 20b ', the comparison unit D plays a role of a fuse with a rare short judgment function for each load.

On the other hand, the thin connecting piece 3b 'on the upper part of the conductive terminal 2b' is connected to the comparing circuit 21 in the comparing section B having the same configuration as the comparing section A via the input terminal 8d 'in the comparing section B. If the fuse detects a rare short even with respect to the load B between the conductive terminals 2a and 2b ', the action of each unit in the comparison unit B causes the abnormality determination output terminal 8 to operate.
An abnormal signal is output from b ′, and the relay 17b is operated via the cutoff signal male terminal 4b.

This means that the right conductive terminals 20a, 20a
The same applies to the multipolar terminal 20 composed of the terminals b and 20b '. The output to the load C between the conductive terminals 20a and 20b is determined from the abnormality determination output terminal 80b and the male terminal 40 for the cutoff signal.
b, and connected to the relay 17c.
The output for the load D between the terminals a and 20b 'is connected to the relay 17d from the abnormality determination output terminal 80b' via the male terminal 40b 'for the cutoff signal. Even when a short circuit is detected, any of the comparison units A, B, C, and D in the judgment unit 8 can output an abnormality signal and operate the relay 17 of the load in which the abnormality has occurred.

As shown in FIG. 6A, a method for manufacturing the fuse element f according to the present invention is to form a thin portion 19 having a constant width on one side (left side) along the longitudinal direction by cutting. As shown in FIG. 5A, as a first step, as shown in FIG. 5 (A), a long fuse material 18 made of one conductive plate made of a zinc (Zn) alloy is intermittently transported. , The conductive terminals 2a, 2b, 2b 'and 20a, 20b, in the pair of left and right multipolar terminals 2 and 20, respectively.
20b 'and each of the male terminals 4a, 4b, 4b', 40b, 40b ', 4c in the six male terminal group 4 in the middle
From the other side (right side) of the long fuse material 18
Except for the non-punched portion 18a at the other side (right side) edge, punching is performed simultaneously in a direction perpendicular to the longitudinal direction.

The non-punched portion 18a serves to prevent dispersion of the multipolar terminals 2 and 20 and the six male terminal groups 4 and to maintain the connection state of the long fuse material 18. 18b is the long fuse material 1
8 is a pilot hole provided by punching at the boundary of each multi-pole type fuse element.
8 is the reference for the feed.

In the second step, the multi-pole terminals 2, 2
The upper thin fuses 1, 1 'and 10, 10' and the thin connecting pieces 3a, 3b and 30a, 30b are simultaneously punched from the thin part 19 of the long fuse material 18.

As a third step, connection pieces 3b ', 30b'
At the same time, the thin connecting portions 5 a, 5 b, 5 b ′, 50 b, 50 b ′, 5 c on the upper part of the six male terminal groups 4 are simultaneously punched from the thin portion 19 of the long fuse material 18.

As a fourth step, the six male terminal groups 4
Upper thin connecting portions 5a, 5b, 5b ', 50b, 5
0b ', 5c and thin connecting pieces 3a, 3b, 3b', 30a, 30b, 30 above the multipolar terminals 2, 20.
One fuse element f is formed by connecting between b ′ and a rare short formed separately by a determination unit 8.

As a fifth step, the six male terminal groups 4
Of the multi-pole type terminals 2 and 20 and the judging section 8 are held so as to be wrapped in a heat-resistant and insulating housing 15 having a pair of 15a and 15b.

As a final step, the non-punched portion 18a at the right side edge of the long fuse material 18 connecting the lower ends between the terminals is punched and separated, as shown in FIG. 5B. Multi-pole type fuse F with one rare short judgment function
To produce

The second step and the third step may be punched simultaneously as one step. In the fifth step, the non-punched portion 18a at the right edge is punched to form one multi-pole fuse. After separating the element f, the housing 15 may be provided as a final step.

As shown in FIGS. 6B and 6C, the form of the long fuse material 18 is as shown in FIG.
In the form of two pieces abutted along the edge in the longitudinal direction, and while intermittently transporting it, punching out each terminal part by the same process as above, multi-pole type at twice the speed Can be manufactured.

That is, the long fuse material 18 in the form of FIG. 6B is a form in which two longitudinal edges of the thin portion 19 in the fuse material in the form of FIG. If this long fuse material 18 is used, two multi-pole type fuse elements f as shown in FIG. 7 can be simultaneously manufactured in a back-to-back configuration. The element f may be separated at the center, or a housing 15 common to both elements may be provided at the center without separating the element f, and as shown in FIG. A multi-pole type fuse F with a rare short judging function in which the male terminal group 4 and the male terminal group 4 are extended can be manufactured.

In the long fuse material 18 shown in FIG. 6C, two longitudinal edges opposite to the thin portions 19 in the fuse material shown in FIG. 6A are abutted. If this long fuse material 18 is used, two multi-pole type fuse elements f face each other (a state in which the multi-pole type terminals 2 and 20 and the male terminal group 4 are butted at the center part). ) Can be manufactured at the same time, so by separating the two multipolar fuse elements f at the center, a multipolar fuse element f can be manufactured at twice the speed at the same time.

FIG. 8A is a side view of the multi-pole type fuse F of the embodiment shown in FIG. The corresponding connector (not shown) can be fitted and used,
FIG. 8B shows a multi-pole type fuse F of the form shown in FIG. 7 in which the multi-pole type terminals 2 and 20 and the male terminal group 4 projecting right and left are bent downward at substantially right angles to form a plug-in type terminal. In the multi-pole type fuse F of this embodiment,
The multi-pole terminals 2, 20 of the multi-pole fuse F are mounted on the wiring board.
And a female member (not shown) of a fuse provided corresponding to the male terminal group 4 and used.
FIG. 8 (C) shows a multipole fuse F of the embodiment shown in FIG. 8 (B), in which the tip of the downwardly bent portion is further horizontally bent outwardly. The type fuse F can be installed on a wiring board and fixed to a terminal provided correspondingly by soldering.

As shown in FIG. 1 (B), the housing 15 is a two-part shape consisting of a pair of 15a and 15b, and the inner surface of one housing 15b is provided with a wide recess 9 except for the outer peripheral portion. The conductive terminals 2a, 2b, 2b 'and 20a, 20b, 2
A recess 11 having a boss 12 at the center thereof into which each of the locking support holes 6 in the upper portion 0b 'is fitted is provided, and the six thin male terminals 4a, 4b, 4b',
A locking recess 13 is provided in which the locking projection 7 above 40b, 40b ', 4c is fitted.

The inner surface of the other housing 15a is
As shown in FIG. 1B, the judging portion 8 of the fuse element f including the six conductive terminals and the six thin male terminals and the judging portion 8 has a backlash with one housing 15b. The two housings 15a and 15b are integrated by bonding or fitting means (not shown).

The multi-pole type fuse F having the rare short judgment function according to the present invention comprises a fuse female terminal which can be inserted into the left and right multi-pole type terminals 2 and 20 provided on the terminal block and six centrally located fuses. A female terminal for power supply, a female terminal for ground, and loads A, B,
Inserted into four signal detection female terminals (not shown) connected to correspond to C and D.

FIG. 3 shows an electric circuit of an automobile using a multi-pole type fuse F having a rare short judging function according to the present invention, wherein a relay 17 is installed immediately after a battery 16 and a plurality of loads A on the downstream side thereof. , B, C, and D, one multipole type fuse F with a rare short decision function is arranged. In this circuit, a multipole type fuse F with a rare short decision function and a plurality of Each load A, B, C, D
If a dead short occurs between any of the above, any one of the thin-walled fusing portions 1, 1 ', 10, and 10' of the multi-pole type fuse F with the rare short judging function is blown in the same manner as the conventional fuse. Only that circuit is interrupted.

In addition, a signal is always output from the connection pieces 3a, 3b and 3a, 3b 'with respect to the current flowing through the thin fuses 1 and 1' of the multi-pole type fuse F with the rare short-circuit judgment function. , Thin-walled fusing portions 10 and 1
Signals are always output from the connection pieces 30a, 30b and 30a, 30b 'with respect to the current flowing through 0', and these signals are always input to one determination unit 8.

Therefore, when the judgment unit 8 detects an abnormality such as a rare short, an abnormal signal is output to the relay 17 and the relay 17 installed immediately after the battery 16 is turned off. All circuits are shut off.

FIG. 4 shows a plurality of loads A, B, C,
D, four relays 17a, 17b, 1 respectively.
In this circuit, if a dead short occurs in any one of the plurality of loads A, B, C, and D, a rare short determination function is performed similarly to the conventional fuse. One of the thin-walled blowout portions 1, 1 ', 10, 10' of the multipole type fuse F is blown and only its circuit is cut off, so that any one of a plurality of loads A, B, C, D is rare. Relay 1 even if a short circuit occurs
Any one of the circuits 7a, 17b, 17c, and 17d operates to shut off only the circuit in which the abnormality has occurred.

In the above embodiment, A,
As the multi-pole type fuse having a rare short judgment function for four loads B, C, and D, a multi-pole type fuse in which three conductive terminals are arranged on the left and right sides of a six male terminal group has been described. However, the number of conductive terminals may be three or more according to the number of loads, and in that case, the number of male terminals may be increased according to the number of conductive terminals.

That is, the configuration, arrangement, and logic for judging a rare short shown in the above-described embodiment are not particularly limited, and it goes without saying that there is a variety of them.

[0050]

In the multi-pole type fuse F having the rare short judging function according to the present invention, at the time of a dead short, like the conventional fuse, like the conventional fuse, the thin fuse 1 of the fuse element is used.
When any one of 1 ′, 10, and 10 ′ is blown, and a rare short circuit that does not blow the thin blown portion of the fuse element occurs, the thin blown portion 1, 1 ′,
10 and 10 ′ function as current detection sensors, and input the current (actually, the voltage applied to both ends of the fuse element) flowing through the thin-walled fusing portion of the fuse element to the determination section 8. It is determined whether or not there is an abnormality, and in the case of an abnormality, an abnormality signal is output and cut off at each relay 17.

It should be noted that the fuse is blown at a constant current and within a fixed time as specified in JASO D612. The variation in the resistance value is also ± 3%, and the fuse element according to the present invention can be sufficiently used as a current detection sensor.

[0052]

According to the present invention, one fuse unit having a fuse function for each of a plurality of loads and a plurality of comparison units for judging a rare short circuit for each of a plurality of loads are integrally provided in one fuse. As a result, a compact multi-pole type fuse having a rare short-circuit judging function can be provided at low cost, and it is economical because it is not necessary to provide a judging unit (judging circuit) for each load.

Further, by using the thin-walled fusing portion originally acting as a fuse as a current detection sensor, no special current sensor is required.

Further, by arranging the detection terminals inside the lower half of the plurality of left and right conductive terminals, there is no waste in removing the material when forming the fuse element, and the judging section is also made flat so that the judging section is formed with the fuse element. By providing the fuses in parallel, it is possible to manufacture the fuses within dimensions slightly larger than the external dimensions of the conventional fuse.

Further, the multi-pole type fuse having a rare short judging function according to the present invention also has the function of a conventional fuse, so that it operates effectively even in the event of a short-circuit failure of a relay, a semiconductor relay, or the like. Therefore, the circuit can be protected.

[Brief description of the drawings]

FIGS. 1A and 1B show a multi-pole type fuse having a rare short judgment function according to the present invention, wherein FIG. 1A is a longitudinal sectional front view, and FIG. 1B is a sectional view taken along line XX of FIG.

FIG. 2 is an example of a judgment logic of a judgment unit in the multi-pole type fuse having a rare short judgment function according to the present invention.

FIG. 3 is an example of an electric circuit of an automobile using a multi-pole type fuse having a rare short judgment function according to the present invention between a plurality of loads and one relay.

FIG. 4 is another example of an electric circuit of an automobile using a multi-pole type fuse having a rare short judgment function according to the present invention between a plurality of relays arranged corresponding to a plurality of loads and a battery.

5A and 5B show a manufacturing process of a multipolar fuse with a rare short judgment function according to the present invention, wherein FIG. 5A is a plan view of a connected state, and FIG. 5B is a plan view of a completed product.

FIG. 6 is a partial perspective view of various types of fuse materials that can be used for manufacturing a multipolar fuse having a rare short judgment function according to the present invention. (A) is a longitudinal front view, and (B) is a longitudinal side view.

FIG. 7 is a longitudinal sectional front view of a multi-pole type fuse having a rare short judgment function according to the present invention in which two multi-pole type fuse elements are arranged back to back.

FIG. 8 is a side view showing various forms of terminal portions in the multi-pole type fuse having a rare short-circuit judging function according to the present invention shown in FIG. 7;

9A and 9B show a conventional fuse with a function of judging a rare short circuit, in which FIG. 9A is a vertical front view, and FIG. 9B is a vertical side view.

FIG. 10 shows an example of an electric circuit of an automobile using a conventional fuse with a rare short judgment function.

FIG. 11 shows an example of an electric circuit of a vehicle using a conventional fuse having a rare short judgment function.

[Explanation of symbols]

 1,10 Thin-walled fusing part 2,20 Multipolar terminal 2a. 2b, 20a, 20b Conductive terminal 3, 30 Thin connection piece 4a Power supply male terminal 4b Cutoff signal male terminal 4c Grounding male terminal 5a Upper end of power supply male terminal 5b Upper end of disconnection signal male terminal 5c Ground Upper end of male terminal for locking 6 Locking punching hole 7 Locking protrusion 8 Judgment unit 8a Power supply terminal 8b, 80b Abnormality judgment output terminal 8c Ground terminal 8d, 8e, 80d, 80e Input terminal 9 Concave 11 Depression 12 Boss 13 Locking recess 15 Housing 17 Relay 18 Long fuse material 18a Non-punched portion 19 Thin portion F Multipolar fuse with rare short judgment function f Multipolar fuse element with rare short judgment function

Claims (6)

[Claims] 1. An upper portion of three or more conductive terminals 2a, 2b,... Arranged on the same plane are electrically connected to each other by fusing portions 1,. From the upper part of the terminals 2a, 2b,.
The multipolar terminals 2 with b,... protruding are symmetrically arranged at a certain interval on the left and right, and a power supply, a plurality of cutoff signals and A male terminal group 4 composed of grounding male terminals 4a, 4b and 4c is arranged in parallel with the multipolar terminals 2 and 2, and the male terminal group 4
, And a plurality of conductive terminals 2a, 2b,..., And upper connecting pieces 3a, 3b,. With multi-pole type fuse element. 2. An upper portion of three conductive terminals 2a, 2b, 2b 'arranged on the same plane are electrically connected to each other by thin-walled fusing portions 1, 1' corresponding to the current carrying capacity of the fuse. At the same time, thin connection pieces 3a, 3b,
3b 'is extended to the side, and three conductive terminals 20a, 20b,
The upper portions of the two conductive terminals 20a, 20b, and 20b 'are connected to each other at the upper portions of the three conductive terminals 20a, 20b, and 20b' at different positions. Connection pieces 30a, 30b, 30
The multi-pole terminals 20 with b ′ protruding laterally are symmetrically arranged at a fixed interval on the left and right, and the upper portion is thin between the multi-pole terminals 2 and 20, respectively. A power supply male terminal 4a serving as a connection portion 5a, and the connection portion 5 also having a thin upper portion.
A male terminal group consisting of six male terminals 4b, 4b ', 40b, 40b' for the cutoff signal, which are b, 5b ', 50b, 50b' and a male terminal 4c for the ground, which also has a thin connecting portion 5c at the top. 4 are arranged in parallel with the two multipolar terminals 2 and 20, and each connection portion 5 on the upper part of each of the six male terminals is provided.
a, 5b, 5b ', 50b, 50b', 5c and thin connecting pieces 3a, 3b, 3 above the six conductive terminals.
A multi-pole type fuse element with a rare short-circuit judging function, wherein the multi-pole type fuse element is connected to b ', 30a, 30b, 30b' through a judging unit 8 for judging a rare short. 3. The multi-pole type fuse element with rare short judgment function according to claim 2, wherein each of said six male terminals 4a,
Of the 4b, 4b ', 40b, 40b', and 4c, the connection portion 5a above the power male terminal 4a is connected to the power supply terminal 8a of the determination circuit 8, and the connection portion 5b above the cutoff signal male terminal 4b is determined. The connection section 5 is connected to the abnormality judgment output terminal 8b for the relay 17a of the section 8 and is connected to the upper part of the earthing male terminal 4c.
c is connected to the ground terminal 8c of the determination unit 8, and the conductive terminal 2
a, 2b, 2b 'Thin upper connecting pieces 3a, 3b, 3
The input terminals 8e, 8d, 8d 'of the determination unit 8 are respectively denoted by b'.
And each of the other male terminals 4b ', 40b, 4
0b 'upper connection parts 5b', 50b, 50b 'are connected to abnormality determination output terminals 8b', 80b, 80b 'for the relays 17a, 17b, 17c of the determination circuit 8, respectively.
The thin connecting pieces 30a, 30b, 30b 'on the upper portions of the conductive terminals 20a, 20b, 20b' are connected to the input terminals 80e, 80d, 80d 'of the judgment unit 8, respectively, and the six male terminals 4a, 4b are connected. , 4b ′, 40b, 40b ′, 4
c and the six conductive terminals 2a, 2b, 2b ',
A multi-pole type fuse having a rare short judging function, wherein upper portions of 20a, 20b, 20b 'and the judging portion 8 are held by a heat-resistant / insulating housing 15. 4. A multi-pole type fuse element with a rare short judgment function according to claim 2, wherein the multi-pole type terminals 2, 20 and the male terminal group 4 face outward on the same plane. Place, each male terminal 4 in both multi-pole type fuse
a, 4b, 4b ', 40b, 40b', and 4c, the connecting portion 5a above the power male terminal 4a is connected to the power supply terminal 8a of the judgment circuit 8, and the connecting portion 5b above the cutoff signal male terminal 4b. Is connected to the abnormality determination output terminal 8b for the relay 17a of the determination section 8, the connection section 5c above the grounding male terminal 4c is connected to the ground terminal 8c of the determination section 8, and the thin section above the conductive terminals 2a, 2b, 2b '. Connection pieces 3a, 3b,
3b 'are input terminals 8e, 8d, 8 of the judgment unit 8, respectively.
d ', and each of the other male terminals 4b', 40
b, 40b 'are connected to the abnormality determination output terminals 8b', 80b, 80b 'for the relays 17a, 17b, 17c of the determination circuit 8, respectively, and the conductive terminals 20a, 20b, 20b' are connected. The thin upper connecting pieces 30a, 30b, 30b 'are connected to the input terminals 80e, 80d, 80d' of the judgment unit 8, respectively, and the male terminals 4a, 4b, 4 of the two multipolar fuse elements are connected.
b ′, 40b, 40b ′, and 4c and each conductive terminal 2
A multi-pole type fuse having a rare short judging function, wherein the upper portion of a, 2b, 2b ', 20a, 20b, 20b' and the judging portion 8 are held by one heat-resistant / insulating housing 15. 5. The multi-pole type fuse element according to claim 4, wherein the multi-pole type terminals 2, 20 and the male terminal group 4, which face outward, respectively, are bent downward at substantially right angles. To form a plug-in terminal, or
A multi-pole type fuse with a rare short judgment function formed by bending downward at a substantially right angle and then bending the tip horizontally outward. 6. The method for continuously manufacturing a multi-pole type fuse having a rare short-circuit judging function according to claim 3, wherein a thin portion 19 having a predetermined width is formed at one side, the center, or both sides along the longitudinal direction. When the long fuse material 18 made of one conductive plate is punched out to a predetermined length while being intermittently transferred, the conductive terminals 2a, 2b, 2b 'and 20a, 20a, of the pair of left and right multipolar terminals 2 and 20 are used. 20b, 20
b 'and six male terminals 4a, 4b, 4b'
The male terminal group 4 composed of 40b, 40b ', and 4c is removed from the other side portion or both side portions or the center portion of the long fuse material 18, and the other side edge or both side edges or the non-punched portion 18a at the center portion. The multi-pole terminals 2 and 20 are simultaneously punched out in the direction perpendicular to the longitudinal direction, and then the thin-walled fusing portions 1, 1 'and 10, 10' on the upper portions of the multipolar terminals 2, 20 and the thin connection pieces 3a, 3b, 3b 'and 30a, 30b, 30
b ′, a thin connecting portion 5 above the male terminal group 4
a, 5b, 5b ', 50b, 50b', and 5c are punched out of the thin portion 19 of the long fuse material 18 simultaneously or in several times, and the thin connecting portion 5 above the male terminal group 4 is punched out.
a, 5b, 5b ', 50b, 50b', 5c and thin connecting pieces 3a, 3b, 3 on the upper portions of the multipolar terminals 2, 20
b ′, 30a, 30b, 30b ′ are connected via a judging unit 8 for judging a rare short, and the male terminal group 4
After holding the upper part of the multi-pole type terminals 2 and 20 and the judging part 8 in such a manner as to be wrapped in one heat-resistant / insulating housing 15, the lower end part between the terminals is connected. A method for continuously manufacturing a multi-pole type fuse having a rare short judgment function, wherein the non-punched portion 18a at the other side edge, both side edges or the center of the fuse material 18 is punched and separated.