JPS6242433Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a shingle breaker mainly used in automobiles.

BACKGROUND OF THE INVENTION BACKGROUND OF THE INVENTION Fiber breakers are well known which are used in automobiles and include a bimetallic conductor which opens a circuit away from its contacts due to an increase in temperature due to an overcurrent flowing during a short circuit or an overload in the wiring. However, it takes a predetermined time for the conductor to open the circuit due to temperature rise due to overcurrent, and if a short circuit occurs during a car collision, there is a risk of a fire occurring due to the short circuit current within this predetermined time.

The purpose of the present invention is to provide a circuit breaker that can immediately open a circuit when an impact of more than a predetermined value occurs, such as during a car collision, to prevent accidents in the event of a fire caused by a short circuit. That's true.

For this reason, the wire breaker according to the present invention has a strip-shaped bimetallic piece fixed at one end to the housing of the wire cutter and conductively connected to a first terminal, and a free end of the bimetallic piece that assumes a neutral position in a straight line. a spring member that is swingably supported in the housing on an extension of the spring member and exerts a pressing force on the bimetallic piece; and a second spring member that is in conductive contact with the bimetallic piece 4 that is curved to one side of the neutral position at room temperature. Terminal and bimetal piece 4
The breaker is bent to one side by the action of a mass body supported by the housing so as to be movable in a direction perpendicular to the bimetallic piece, and a mass body that is displaced by a rise in temperature of the bimetallic piece or by an impact force applied to the breaker. The bimetallic piece, which was momentarily bent from the neutral position to the other side and separated from the second terminal, is bent back from the other side to the one side after the temperature rises or the impact force ends. and a reset member that is brought into conductive contact with the second terminal.

According to the present invention, when an overcurrent flows through the circuit breaker, the temperature of the bimetallic piece rises, and the bimetallic piece instantly bends from one side of its neutral position to the other side due to the action of the spring member. (snapping operation) and then separating from the second terminal to perform a crinkling operation. If the breaker is subjected to an impact force exceeding a specific value, the mass body is displaced and the breaker performs the same breaker operation as when an overcurrent occurs. Furthermore, the reset member allows the breaker to be easily returned to its initial energized position. In this way, it is possible to obtain a simple-structured breakout switch that snaps in response not only to overcurrent but also to impact force.

Next, embodiments of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, a pair of insertion terminals 1 and 2 protrude a predetermined amount from a housing 3 made of an insulating material and are fixed to the housing 3.

A conductor 4 made of a strip-shaped bimetallic piece is fixed at one end to the housing 3 and connected to the terminal 2 as a conductor. A V-shaped groove 7 is formed in the housing 3 in the extension of the free end of the conductor 4 which assumes an elongated neutral position; The movable member 6 swingably supports a coil spring 5 serving as a spring member that presses the free end of the conductor 14 . Conductor 4
is a contact 9 that can contact the contact 8 of the plug-in terminal 1
It has Push rod 13 as a reset member
is partially exposed outside the housing 3,
It can be pushed into the housing 3 and has an extended portion 14 that abuts the conductor 4 at its tip. The expanded portion 14 serves to prevent the push rod 13 from coming off the inner wall 3. A mass body 15 of a predetermined mass is movably arranged within a guide wall 16 inside the housing 3 . The inner surface of the guide wall 16, that is, the mass body 1
A spring is placed on the surface in contact with the mass body 15.
It is preferable that the movement of the mass body 15 be regulated by pressing with a constant force. Further, a stopper 17 for the coil spring 5 is provided on the inner wall of the housing 3.

By pushing in the push rod 13, the conductor 4 is bent toward the insertion terminal 1 (FIG. 1). Under normal conditions, the bending force of the conductor 4 toward the push rod 13 is small, and the coil spring 5 also biases the conductor 4 toward the insertion terminal 1, so the contacts 8 and 9 are in contact with each other, The circuit is closed.

When a short circuit occurs or the load becomes overloaded and an overcurrent flows through the conductor 4, the conductor 4, whose temperature rises, bends toward the push rod 13 against the coil spring 5. When the conductor 4 bends toward the push rod 13 by a predetermined amount or more, the swinging member 6 tilts toward the push rod 13 and the coil spring 5 urges the conductor 4 toward the push rod 13. 4, the coil spring 5 is the stopper 1
The contact points 8 and 9 are separated and the circuit is opened (FIG. 2).

When an impact occurs on the shingle breaker, such as in the case of a car crash, the mass body 15 contacts the conductor 4 due to inertia and exerts a force on the conductor 4 in the direction of the push rod 13 . As a result, the conductor 4 curves toward the push rod 13 against the coil spring 5, and the conductor 4 bends toward the push rod 13.
3, the coil spring 5 urges the conductor 4 toward the push rod 13, so the contact 9 of the conductor 4 separates from the contact 8 of the insertion terminal 1, and the circuit is closed. It immediately becomes open (Fig. 2).

[Brief explanation of the drawing]

FIGS. 1 and 2 are sectional views showing the first embodiment of the present invention in a normal state and in an impact state, respectively. 1, 2... terminal, 3... housing, 4... bimetal piece (conductor), 5... spring member (coil spring), 13... reset member (push rod), 15...
...mass body.

Claims (1)

[Scope of utility model registration request] A strip-shaped bimetallic piece 4 whose one end is fixed to the housing 3 of the breaker and is electrically connected to the first terminal 2.
The spring member 5 is swingably supported at the housing 3 on the extension line of the free end of the bimetal piece 4 and assumes a neutral position in which the eyelids are extended, and exerts a pressing force on the bimetal piece 4, and the spring member 5 assumes a neutral position at room temperature. a second terminal 1 in conductive contact with a bimetallic piece 4 curved to one side of the bimetallic piece 4; a mass body 15 supported by the housing 3 so as to be movable in a direction perpendicular to the bimetallic piece 4; The mass body 15 is displaced by a temperature rise or an impact force applied to the breaker.
The bimetallic piece 4, which has been bent to one side by the action of the above-described bending to the other side beyond the neutral position and separated from the second terminal 1, is heated or subjected to an impact force. and a reset member 13 which is curved back from the other side to the one side after completion of the reset period to bring it into conductive contact with the second terminal 1.