JPH1012106A - Fall down switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fall down switch in which a contact point is not closed even if an object abuts with a sliding body after a device main body has fallen down by providing a free rotatable pendulum rotating according to front or back falling down of the device main body between a movable plate and the sliding body. SOLUTION: When a bottom face of a main body 8 is released from a setting face 10, reaction force bending a movable plate 4 is eliminated, the movable plate 4 restores a pendulum body 11 and a sliding body 9 to their original positions by means of restoring farce due to the spring property, both contact points 21 and 22 of the fall down switch are opened, and the operation of the device main body 8 stops. During front on back falling down, the movable plate 4 releases pressure by means of the spring, opens both contact points 21 and 22 of the fall down switch, and restores the pendulum body 11 and the sliding body 9 to the original position. The pendulum body 11 rotates at a center of a support point, whereby even if the sliding body is pressed while the pendulum body 11 falls down, whereby the movable plate 4 is not pushed up, and the opening state of both contact points 21 and 22 can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overturn switch suitable for use in an electric stove, an electric hot air heater, etc., and in particular, automatically opens and closes when the apparatus falls, tilts, and is carried to ensure the safety of the apparatus body. The present invention relates to a fall switch for opening a contact portion.

[0002]

2. Description of the Related Art As this type of conventional overturn switch, the one shown in FIG. 7 is generally widely used. In FIG.
Reference numeral 1 denotes a switch substrate made of a phenolic resin or the like having an insulating property. The switch substrate 1 has contacts 21, 22 formed of a contact material such as a silver alloy and has flexibility, spring property, and conductivity. A fixed plate 3 made of a phosphor bronze plate or the like and a movable plate 4 are fixedly provided with rivets 5 made of aluminum or the like near one end with one end as a free end. The contacts 21 and 22 formed on the fixed plate 3 and the movable plate 4
Are provided so as to face each other at a predetermined interval. The terminal portion 6 provided on the fixing plate 3 has, for example, an AC
One end of the cord is connected (not shown). The terminal 7 provided on the movable plate 4 is connected to an end of a lead wire connected to, for example, a heater on the load side (not shown).

The above-mentioned tipping switch is attached to a device main body 8 such as an electric stove or an electric warm air heater as shown in FIG. On the bottom of the device main body 8, a sliding body 9 that moves in the opening and closing directions of the two contacts 21 and 22, one end of the sliding body 9 is in contact with the back surface of the contact portion of the movable plate 4, and the other end is the device main body 8. It is attached in a state protruding from the bottom of.

[0004] The state of the overturn switch in a normal state in which the bottom surface of the device main body 8 is placed on the installation surface 10 is as shown in FIG.
The lower end of the sliding member 9 moves to the bottom surface of the device main body 8 by the reaction force of the own weight of the device main body 8 so that the upper end of the sliding member 9 pushes up the free end of the movable plate 4 and the movable plate 4 bends. The two contacts 21 and 22 come into contact with each other, and the overturn switch is closed. In this state, when the energizing switch for turning on / off the energization of the heater or the like is turned on, the energization of the heater or the like is performed and the normal operation is performed.

When the bottom surface of the main body 8 separates from the installation surface 10 due to the inclination, fall, or carry of the equipment main body 8, the reaction force that has caused the movable plate 4 to bend is lost, and the movable plate 4 becomes springy. The state shown by the solid line in FIG. 10 is brought about by the restoring force, the two contacts 21 and 22 of the overturn switch are opened, and the operation of the device main body 8 is stopped.

[0006]

However, when the power switch is turned on, that is, in a normal operation state, the main body of the electric stove or the like falls down, and even if the fall switch is once operated to cut off the power supply to the heater or the like, If an object comes into contact with the sliding body 9 in this state, the sliding body 9 may be pressed and the contacts 21 and 22 may be closed. In such a case, energization of the heater or the like is started in a state of falling down, If there were combustible materials around, there was a danger of causing a fire.

[0007] The present invention solves the above-mentioned problems, and the contact is closed even if an object comes into contact with the sliding body 9 after the main body of the electric stove or the like falls down in a state where the power switch is on, that is, in a normal operation state. It is an object of the present invention to provide a fall switch capable of accurately detecting the falling direction of the device body regardless of the direction in which the device body falls.

[0008]

In order to solve the above-mentioned problems, a tilt switch according to the present invention comprises a first contact of a movable plate provided on a lower surface of a support substrate, and a second contact which faces the first contact. A fixed plate provided with a contact point and a vertically slidable sliding body protruding from the bottom surface of the device main body. In the first state in which the device main body is installed on the installation surface, the sliding body is moved by its own weight in the first state. To short-circuit the first and second contacts, and in the second state in which the device body falls down before or after the installation surface, the sliding body releases the pressing by the spring property of the movable plate, In a tipping switch for opening between the first and second contacts, a rotatable pendulum body is provided between the movable plate and the sliding body, the rotatable pendulum body rotating in accordance with the tipping of the device body back and forth. In the state of, the sliding body causes the pendulum body to move by its own weight. Pressure, the pendulum member presses the movable plate to short-circuit the first and second contacts, the second
In the state of the above, the pendulum body and the sliding body release the pressing due to the spring property of the movable plate, open the first and second contacts, and press the sliding body while falling down before or after. In this case, the first and second contacts are opened.

Therefore, in the above configuration, in a normal state, the lower end of the sliding body is pushed upward by the installation surface, the upper end pushes the lower end of the pendulum body upward, and the upper end pushes the free end of the movable plate. The flexure closes the first and second contacts of the tipping switch. When the front or rear falls, the bent movable plate releases the pressing force due to the spring property, and the first and second contacts of the falling switch are opened, and the pendulum body and the sliding body are returned to their original positions. Return to When the pendulum body rotates about the fulcrum, the movable plate cannot be pushed up because the pendulum body falls down even if the sliding body is pressed while falling down. The open state can be maintained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tilt switch according to the present invention will be described below with reference to FIGS. 1 to 6 and the same parts as those in the above-mentioned conventional example will be described with the same reference numerals.

1 to 3, reference numeral 1 denotes a switch substrate made of an insulating phenol resin or the like, and the switch substrate 1 has contacts 21 and 22 formed of a contact material such as a silver alloy. A fixed plate 3 and a movable plate 4 made of a flexible, springy, or conductive phosphor bronze plate or the like are provided with one end being a free end and fixed by a rivet 5 made of aluminum or the like near the other end. The contacts 21 and 22 formed on the fixed plate 3 and the movable plate 4 are provided so as to face each other at a predetermined interval. The terminal 6 provided on the fixing plate 3 is connected to one end of, for example, an AC cord on the power supply side (not shown). Further, an end of a lead wire connected to, for example, a heater on the load side is connected to the terminal portion 7 provided on the movable plate 4 (not shown).

As shown in FIG. 1, the above-mentioned overturn switch is attached to a device main body 8 such as an electric stove or an electric hot air blower. On the bottom of the device main body 8, a sliding body 9 that moves in the opening and closing directions of the two contacts 21 and 22, and a rotatable rotating between the movable plate 4 and the sliding body 9 according to the fall of the front and rear of the device main body. Is provided. One end of the sliding body 9 is attached to the pendulum body 11 and the other end is protruded from the bottom of the device body 8.

As shown in FIG. 2, the state of the fall switch in a normal state in which the bottom surface of the device body 8 is placed on the installation surface 10 is as follows.
The lower end of the sliding body 9 moves to the bottom of the equipment main body 8 by the reaction force of the own weight of the equipment main body 8, so that the upper end of the sliding body 9 pushes up the pendulum body 11, and the pendulum body has a play of the movable plate 4. The end is pushed up, the movable plate 4 bends, the two contacts 21 and 22 come into contact, and the tipping switch is closed. In this state, when the energizing switch for turning on and off the energization of the heater and the like is turned on, the heater and the like are energized and operate normally.

When the bottom surface of the main body 8 separates from the installation surface 10 due to the inclination, fall, or carrying of the equipment main body 8, the reaction force that deflects the movable plate 4 disappears, and the movable plate 4 becomes springy. The pendulum body 11 and the sliding body 9 are returned to their original positions by the restoring force by the above, the state shown by the solid line in FIG. 3 is reached, the two contacts 21 and 22 of the overturn switch are opened, and the operation of the device body 8 is stopped. Stop. Further, the movable plate 4 which has been bent at the time of the fall before or after the release is released by the spring property, and the contact points 21 and 22 of the fall switch are opened, so that the pendulum body 11 and the sliding body 9 are moved. And the pendulum body 11 is rotated about the fulcrum, so that the movable plate 4 cannot be pushed up due to the pendulum body 11 falling down even if the sliding body 9 is pressed while falling down. The open state of the two contacts 21 and 22 can be maintained.

Next, another embodiment of the tilt switch according to the present invention will be described with reference to FIGS. 4 to 6, reference numeral 1 denotes a switch substrate made of an insulating phenol resin or the like. On the switch substrate 1, a flexible substrate having contacts 21 and 22 formed of a contact material such as a silver alloy is used. A fixed plate 3 and a movable plate 4 made of a spring bronze or conductive phosphor bronze plate or the like are provided with one end being a free end and fixed by a rivet 5 made of aluminum or the like near the other end. The contacts 21 and 22 formed on the fixed plate 3 and the movable plate 4 are provided so as to face each other at a predetermined interval. The terminal 6 provided on the fixing plate 3 is connected to one end of, for example, an AC cord on the power supply side (not shown). Further, an end of a lead wire connected to, for example, a heater on the load side is connected to the terminal portion 7 provided on the movable plate 4 (not shown).

As shown in FIG. 4, the above-mentioned overturning switch is attached to a device main body 8 such as an electric stove or an electric hot air blower. The two contacts 21 and 22 are provided on the bottom of the device body 8.
Along with the sliding body 9 that moves in the opening and closing directions, a rotatable pendulum body 11A is provided between the movable plate and the sliding body, the rotatable pendulum body rotating in response to any fall of the front, rear, left, and right of the device main body. One end of the sliding body 9 is attached to the pendulum body 11 </ b> A and the other end protrudes from the bottom of the device main body 8.

As shown in FIG. 5, the state of the fall switch in a normal state in which the bottom surface of the device main body 8 is placed on the installation surface 10 is as follows.
The lower end of the sliding member 9 moves to the bottom surface of the device main body 8 by the reaction force of the own weight of the device main body 8 so that the upper end of the sliding member 9 pushes up the pendulum 11A, and the pendulum 11A When the free end is pushed up, the movable plate 4 bends, the two contacts 21 and 22 come into contact, and the overturn switch is closed. In this state, when the energizing switch for turning on / off the energization of the heater or the like is turned on, the heater or the like is energized and operates normally.

When the bottom of the main body 8 separates from the installation surface 10 due to the inclination, fall, or carrying of the equipment main body 8, the reaction force that caused the movable plate 4 to bend is lost, and the movable plate 4 becomes springy. 6 returns the pendulum body 11A and the sliding body 9 to their original positions. The state shown by the solid line in FIG. 6 is reached, the two contacts 21 and 22 of the overturn switch are opened, and the operation of the apparatus body 8 is stopped. I do. Further, the movable plate 4 which has been bent when falling in any direction releases the pressing force due to the spring property, and the contact points 21 and 22 of the falling switch are opened, so that the pendulum body 11A and the sliding body 9 To the position. Since the pendulum body 11A rotates about the hemispherical fulcrum, the movable plate 4 cannot be pushed up because the pendulum body 11A has fallen, even if the sliding body 9 is pressed while it is overturned. The open state of the contacts 21 and 22 can be maintained.

[0019]

According to the first aspect of the present invention, the contact switch is kept open even when the device body falls down, even if it touches the sliding body. It is possible to reliably prevent a power-on accident at the time of a fall.

Further, according to the invention of claim 2, it is possible to obtain a switch structure that accurately responds to the inclination of the device main body when the device main body falls down in the front-back direction. Further, according to the third aspect of the present invention, it is possible to obtain a switch structure that accurately responds to the inclination of the device main body even when the device main body falls in any direction.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional configuration diagram of a built-in example showing one embodiment of a tipping switch of the present invention.

FIG. 2 is a schematic cross-sectional configuration diagram of a built-in example showing a normal state of an embodiment of the overturn switch of the present invention.

FIG. 3 is a schematic cross-sectional configuration view of a built-in example showing a state of a fall switch according to an embodiment of the present invention at the time of fall.

FIG. 4 is a schematic cross-sectional configuration view of a built-in example showing another embodiment of the overturn switch of the present invention.

FIG. 5 is a schematic cross-sectional configuration diagram of a built-in example showing a normal state of another embodiment of the overturn switch of the present invention.

FIG. 6 is a schematic cross-sectional configuration diagram of an assembling example showing a state of a fall switch according to another embodiment of the present invention at the time of fall.

FIG. 7 is a schematic cross-sectional configuration diagram illustrating an embodiment of a conventional tipping switch.

FIG. 8 is a schematic cross-sectional configuration diagram of a built-in example showing an embodiment of a conventional fall switch.

FIG. 9 is a schematic cross-sectional configuration diagram of a built-in example showing a normal state of an embodiment of a conventional tipping switch.

FIG. 10 is a schematic cross-sectional configuration diagram of a built-in example showing a state of a conventional fall switch according to an embodiment when the fall is performed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Switch board 21 Contact 22 Contact 3 Fixing plate 4 Movable plate 5 Rivets 6 Terminal part 7 Terminal part 8 Device body 9 Sliding body 10 Installation surface 11 Pendulum body 11A Pendulum body

Claims (3)

[Claims] 1. A first contact of a movable plate provided on a lower surface of a support substrate, a fixed plate provided with a second contact opposed to the first contact, and a vertical contact protruding from a bottom surface of the device body. A sliding body that is slidable, and in a first state in which the equipment body is installed on the installation surface, the sliding body presses the movable plate by its own weight to short-circuit the first and second contacts, and In a second state, in which the slide body is tilted before or after the installation surface, the sliding body releases the pressing force due to the spring property of the movable plate to open the first and second contacts. A rotatable pendulum body is provided between the movable plate and the sliding body, the rotatable pendulum body rotating in accordance with the fall of the device body. In the first state, the sliding body presses the pendulum body by its own weight, and the pendulum body is Pressing the movable plate to connect the first and second contacts In the second state, the pendulum body and the sliding body release the pressing by the spring property of the movable plate, open the first and second contact points, and keep the front and rear overturned. An overturning switch characterized in that the first and second contacts are opened even when the sliding body is pressed. 2. The overturn switch according to claim 1, wherein the pendulum body is mounted so as to cope with an overturn of the apparatus body. 3. The overturn switch according to claim 1, wherein the fulcrum of the pendulum body has a spherical surface so that the pendulum body is mounted so as to cope with an overturn of the device body in all directions.