JPS585937A - Circuit breaker protecting device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This generator #4 consists of a temperature fuse and a heater electron.
Concerning road release protection l1lVLi1.

Generally, when a failure such as a power supply abnormality occurs in an electronic circuit, it is inevitable that the current circuit tl [WT of the main circuit] occurs. Therefore, an abnormality detection circuit that detects abnormal voltage jets or currents is usually provided, and the narrow path cutoff*M device operates in response to the output signal from this abnormality detection (b) path, cutting off the main rigid path. be done. This circuit disconnection protection device has various omit
However, there is a device in which a temperature fuse built into the main circuit and an output signal (output current) from an abnormality detection circuit are integrated with an output element. Such a circuit-blocking pupil-keeping device can be installed in a relatively large room with a small WIO element, such as a printed wiring board constituting an electronic circuit tube. The delay time required for the circuit to be disconnected from the time an abnormality is detected is set, and the disconnection operation is irreversible. Furthermore, the structure is simple and relatively robust, so
It has many features such as being suitable for use in equipment with strict product terms such as automobiles.

Specifically, #1M is a *-shaped insulator tube (11t) made of a heat-resistant insulator such as ceramic vine, as shown in Fig. Heater elements (heating elements) 12 are arranged, for example, in a spiral shape, and the output signal II[WLt of the abnormality detection circuit is supplied to the heater elements 1:2, and the nickel silver medium that is the support of the insulator tube 11 is supplied. Gold made of brass etc. 13-1.1
3-A heater is constructed by installing the heater. Furthermore, as shown in Figure N8, there is a 11 degree heat 14 inside this insulator tube 11 (normally the rated temperature is 70°C to 214°C, the rated current is about 10 μm).
is provided, and at this temperature both terminals 1s-1,
15-2 is connected to the main circuit Vc of the electronic circuitry. The metal terminals 13 to 1.13-2 of the insulator tube 11 and both terminals 1s-1 and 15-2 of the temperature heater are usually fixed to the printed wiring board 16 by soldering #.

In such a circuit 1 emphysema device, when an abnormality occurs in the electronic rigid node, the abnormality detection circuit detects the metal terminal 13-1 of the insulator tube 11.
A current is supplied to 13-2, and heater element 12 generates heat. Therefore, the temperature fuse 14 wire is heated, and the temperature fuse 1
When the temperature of Q4 or the rated temperature is reached, the temperature fuse 14 is blown to form an open circuit 11, and the main circuit of the subsidiary circuit is cut off.

However, with such a circuit breaker protection device, the insulator 11
He who inserted the temperature fuse 14 into the insulator tube 11 yen as shown in the 2nd rIIJK,
Both terminals 15-1.1! -31 is bent and attached to the printed wiring board 16, so it is undefined. Moreover, the third
As shown in the figure, the temperature distribution inside the insulator tube 11 is normal.
The temperature is the highest at the center of No. 1, and gradually lowers at the openings at both ends, so the temperature needs to be No. 14 and No. 11.
If the relative position between the There is a drawback.

This invention was made in view of the above circumstances, so lN1
It is an object of the present invention to provide a circuit breaker protection device 1 which has stable circuit protection II characteristics by making the circuit breaker operating time constant, which is the heating effect of 1 degree heat, by equalizing the heating for f heat by 11 degrees. shall be.

The 1M unit of this invention will be explained below with reference to the drawings. Figure 4 shows the configuration of the broom, which is a cylindrical insulator tube made of a heat-resistant insulator such as ceramic.
A heater element (heating element) 12 is provided, which is made of a relatively high-resistance conductor of the type 45S. At this time, a through hole 4, for example, a rectangular O slit, is provided at a predetermined O position of the insulator tube 11, usually at the center of the hole 11iii. A temperature fuse 14 similar to that described above is inserted and arranged on the hollow SK of this insulator tube 11, and its both terminals 15-1, 15-2 are bent, for example, and fixed to the printed wiring board 16 by soldering. Ru. This causes the temperature leak 14 to
It is set as a current path for a main circuit such as an electronic circuit configured on the J board 16. Further, the heater element 12 of the insulator tube 11 receives an output signal from the abnormality detection circuit via a metal terminal 13-1. Tortoise flIL is supplied. In the circuit breaker protection device configured in this way, when an abnormality occurs in the electronic path, the metal terminal 1B-1 is sent from the abnormality detection circuit.
, 13-2t', when a current is supplied to the heater element 12, heat corresponding to the current is generated from the heater element 12, and the S degree in the hollow portion of the insulator tube 11 increases. At this time, as shown in Figure 11g3 above, the 011 degree distribution is non-uniform even when considering the change in the vertical distribution due to the through-hole portion 41flC. The relative position of the insulator tube 11 and the 11 degree
1) can be accurately defined and set. Therefore 112
As the temperature of the fuse 14#i is made uniform by the heating, when the temperature reaches the rated temperature, the fuse becomes open, and the breaking operation time across the current path of the main circuit is made constant. However, il! It is assumed that the characteristics of the temperature fuse (especially the rated a degree) and the characteristics of the heater element (including 'tlRf from the abnormality detection circuit) are constant.

Figure N15 and Figure 6 are the above IJ! This figure shows a circuit interrupting protection device in which the shape of the through hole 41 provided in the insulator tube 11 is modified in the example. In other words, as shown in Figure 5, the hole 'N541 (1' is shaded), and as shown in Figure 6, it is made circular.In this case, the hole -1 is small. (In the case of Figure 6 in 41), if the relative position of the hot fuse and the insulating pipe JJO cannot be confirmed accurately,
Attach a 4ft meter to the center of the temperature fuse.
Therefore, it can be confirmed. Note that the configuration, operation, and effects of other parts are completely similar to those of the above embodiment, so the same reference numerals are given and explanations thereof will be omitted.

1, the above-mentioned insulator tube 11C) shape is usually cylindrical, but is not limited to this, and may be a polyhedral columnar shape as long as it is cylindrical with a hollow part in which m degrees of heat 14 can be arranged. The shape of the through hole 410 is not limited to a rectangle, a rhombus, or a circle, but may also be an O-shape.

As described above in detail, according to the present invention, by being able to define and set the relative position atE11 between the insulator tube and the temperature fl V-JL- that make up the heat exchange, the temperature of the heating for the glass can be made uniform. From the heating effect of the nose, one-way cut-off operation time [constant and stable silk road maintenance W]
It is possible to provide a circuit 1 line protection device having the k characteristic.

[Brief explanation of the drawing]

Figures 1A and 1B are schematic configuration diagrams of conventional circuit breakers. a cross-sectional view of a circuit interrupting protection device in
FIG. 3 is a diagram illustrating the temperature distribution characteristics of a conventional circuit breaker protection device, FIG. 41 is a schematic configuration diagram of a circuit breaker protection device according to an embodiment of the present invention, and FIG. FIG. 6 is a schematic configuration diagram of a circuit breaker protection device according to an embodiment of the present invention; FIG. 11... Insulator tube, 12... Heater element, l5-1゜l
5-2...Metal terminal, 14...Temperature fuse, 15
-1.15-2...terminal, 16...printed wiring board. Applicant's agent Patent attorney Suzue

Claims (1)

[Claims] an insulator tube having a hollow portion and made of a heat-resistant insulator; a temperature fuse disposed within the hollow portion of the insulator tube; and a thermal element provided in the insulator tube insulated from the temperature fuse and generating heat in response to current supply. and T-, and a through hole is provided at a predetermined position of the insulator tube, and the tube 4 is configured such that a temperature fuse provided in the hollow portion can be seen through from the outside of the insulator tube.
Circuit lotus-cutting device with I sign.