JP3063053B2 - Outlet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for an aquarium fish tank and various other plugs, which detects the temperature of a contact portion with an outlet and outputs a temperature signal, or outputs a temperature signal in accordance with the temperature signal. The present invention relates to an outlet that shuts off power supply to a power outlet.

[0002]

2. Description of the Related Art A plug may be ignited when the temperature of the plug rises above a set temperature. Therefore, there has been proposed a plug provided with a safety device for an electric device for interrupting power supply from the plug. As disclosed in Japanese Utility Model Application Laid-Open No. 4-118581, such a safety device for an electric device causes an abnormal increase in the temperature inside the plug due to poor contact between the receptacle blade of the outlet and the plug blade of the plug. Then
The temperature rise prevention device operates to cut off the power supply from the plug. Therefore, it is possible to prevent the plug from igniting and causing a fire due to an abnormal rise in the temperature inside the plug.

[0003]

The conventional safety device for electric equipment detects that the temperature inside the plug rises due to power supply, and cuts off power supply from the plug when the detected temperature exceeds a set temperature. A temperature rise prevention device is incorporated in the plug. Therefore, the temperature rise prevention device must be incorporated in a small plug, which makes the assembly difficult and structurally complicated. In addition, even if tracking occurs in the insulator of the plug or the outlet and the temperature of the plug or the outlet abnormally rises due to the progress of the tracking, there is a disadvantage that the temperature rise due to the tracking cannot be detected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned inconvenience, and a temperature-sensitive element can be incorporated with a sufficient space, and the temperature of a connection plug can be reliably detected. When the temperature becomes higher than a set temperature due to, for example, the power supply to the connection plug is cut off, and an outlet is provided for notifying that the connection plug has become higher than the set temperature by an alarm device.

[0005]

Means for Solving the Problems] The inventions includes a outlet body and interior of the pair of receiving blades for receiving a pair of connecting blades of the connection plug, the temperature sensing which retractable projecting between the receiving blades of the outlet body element and a biasing member for biasing so as to project the thermosensitive element from the receptacle body, supplying power to the receiving blade condition, a switching circuit for the cut-off state, setting the temperature signal from the temperature sensing element temperature Then, a control circuit that operates the switch circuit to cut off the power supply to the blade is provided.
The outlet provided with a leakage current detecting element for detecting a leakage current downstream of the receiving blade, wherein the control circuit operates the switch circuit even when a leakage signal is supplied from the leakage current detecting element to receive the receiving blade. cut off the supply of power to, even if the leakage signal from the leakage current detecting element is supplied, it is intended to operate the alarm.

Next, an outlet according to another invention is provided in a plug in which a pair of blades are connected to a pair of connected receiving blades of the connected outlet, and a plug case of the plug,
A first temperature sensing element for detecting the temperature between the blades, an outlet body connected to the plug via a cord and receiving a pair of connecting blades of the connecting plug, and a receiving blade of the outlet body And a biasing member for biasing the second temperature-sensitive element so as to protrude from the outlet main body. And
The first temperature sensing element may be urged and protruded by an urging member so as to be able to protrude and retract between the blades, or a plug may be provided integrally with the outlet main body. A switch circuit for supplying and interrupting power to the receiving blade; and a temperature signal from the first temperature-sensitive element being equal to or higher than a first set temperature, or a temperature signal from the second temperature-sensitive element being equal to the first temperature. It becomes equal to or larger than the set temperature lower than the second set temperature, kick set and a control circuit for interrupting the power supply to the receiving blades by operating the switch circuit is desirable. Further, a return means for canceling the operation of the control circuit may be provided, an output of the control circuit in which the temperature signal from the first temperature sensing element has become equal to or higher than the first set temperature, or a temperature signal from the second temperature sensing element. It is desirable to provide an alarm which operates in response to the output of the control circuit when the temperature has reached two or more set temperatures. In addition, a leakage current detection element for detecting a leakage current downstream of the blade is provided, and the control circuit operates the switch circuit even when a leakage signal is supplied from the leakage current detection element to supply power to the blade. It is also desirable to shut off the supply of power and to operate the alarm even when a leakage signal is supplied from the leakage current detection element.

An outlet according to still another aspect of the present invention is an outlet having a pair of receiving blades for receiving a pair of connecting blades of a connecting plug, and a temperature signal relay means for relaying a temperature signal supplied through the connecting plug. When the temperature detected based on the temperature signal supplied through the temperature signal relay unit becomes equal to or higher than the set temperature, the switch circuit is operated. a control circuit for interrupting power supply to the receiving blade Te, and the temperature sensitive element for retractable projecting between the receiving blades co synth <br/> cement body,
A biasing member for biasing so as to project the thermosensitive element from the receptacle body, the control circuit, when the temperature signal from the temperature sensing element is equal to or greater than the set temperature, to operate the switch circuit to receive This is to cut off the power supply to the blade .

Next, a plug according to yet another aspect of the present invention is provided with a plug in which a pair of blades are connected to a pair of connected receiving blades of a connected outlet, and a plug case of the plug, and a temperature between the blades. Temperature sensing element for detecting a temperature, a pair of receiving blades connected to the plug via a cord and receiving a pair of connecting blades of the connecting plug, and a temperature signal relay means for relaying a temperature signal supplied via the connecting plug And a switch circuit for supplying and interrupting power to the receiving blade, and a temperature signal from the first temperature sensing element becomes equal to or higher than a first set temperature or via a temperature signal relay unit. If the temperature signal supplied is the second or more set temperature lower than the first set temperature, and a control circuit for interrupting the power supply to the receiving blades by operating the switch circuit, infested during receiving blades of the outlet body Protruding possible That a second temperature sensitive element, and a biasing member for biasing so as to project the second temperature sensitive device from the receptacle body, the control circuit, the temperature signal from the second temperature sensitive device is the second set temperature Even in the case described above, the power supply to the receiving blade is cut off by operating the switch circuit .

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an outlet according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a plug, which is connected by a cord 2 to a receiving blade 4 and a control circuit 19 described later. Reference numeral 3 denotes a resin outlet body having electrical insulation, and a pair of receiving blades for receiving a pair of connection blades L provided in a connection plug case O (made of resin having electrical insulation) of the connection plug P. A through hole 5 is provided between the receiving blades 4 and has a stepped portion 6 with which a flange portion 10 of a protective tube 9 in which a thermistor 7 described later is sealed contacts.

Reference numeral 7 denotes a thermistor as a temperature sensing element.
The lead 8 is connected to a temperature comparison unit 20 of a control circuit 19 described later. Reference numeral 9 denotes a protective tube in which the thermistor 7 is sealed, which is made of an insulating material, and provided with a flange portion 10 that contacts the step portion 6 of the through hole 5. Reference numeral 11 denotes a through hole 12 screwed or welded to the rear end of the through hole 5 of the outlet body 3.
An annular stopper having a protective tube 9 is provided so that the protective tube 9 can enter and exit the through hole 12.

Reference numeral 13 denotes a flange 10 of the protective tube 9 and a stopper 11
This shows a coil spring as an urging member loaded between them, and urges the flange 10 of the protective tube 9 so as to abut the step 6 of the through hole 5. Therefore, the tip of the protection tube 9 protrudes from the outlet main body 3 by about 7 mm in a state where the flange portion 10 of the protection tube 9 is in contact with the step portion 6 of the through hole 5.

Reference numeral 14 denotes a relay as a switch circuit. When the coil 15 is not energized, the power from the plug 1 is supplied to the receiving blade 4, and when the coil 15 is energized, the power from the plug 1 is received. The contact piece 16 is switched so as to be in a cut-off state in which the supply piece 4 is not supplied. 17
Indicates a green lamp indicating a normal state, and turns on when power is supplied from the plug 1 to the receiving blade 4. Reference numeral 18 denotes a red lamp for displaying an abnormal state, which is turned on when power is not supplied from the plug 1 to the receiving blade 4.

Reference numeral 19 denotes a control circuit, for example, 100 degrees Celsius.
When the detected temperature of the thermistor 7 is lower than the set temperature, a normal temperature signal is output, and when the detected temperature of the thermistor 7 becomes higher than the set temperature, A temperature comparison unit 20 that outputs an abnormal temperature signal, a relay control unit 21 that energizes the coil 15 of the relay 14 when the temperature comparison unit 20 outputs the abnormal temperature signal to control the coil 15 in an excited state, and a temperature comparison unit 20 When an abnormal temperature signal is output, the buzzer control section 22 controls the buzzer 23 as an alarm device to sound.

FIG. 2 is an explanatory view showing a use state of the outlet according to the first embodiment. The same reference numerals are given to the same portions as those in FIG. 1 and the description is omitted. In FIG. 2, 31
Indicates an outlet configured to be able to connect four plugs, and from the receiving blade 4 shown in FIG.
Four sets of up to three are provided. C indicates an outlet provided on the wall W, and the plug 1 connected to the outlet 31
Are connected.

Reference numeral 41 denotes an aquarium for aquarium fish, in which water, pebbles, aquatic plants, and the like are filled, and aquarium fish such as goldfish and tropical fish are also added to the tank. Reference numeral 42 denotes a filter for filtering water, which is a pump provided therein for circulating and filtering water in the aquarium 41 for aquarium fish, and a plug 43 connected to the pump is connected to the outlet 31. Reference numeral 44 denotes a lighting device mounted on the upper part of the ornamental fish tank 41. A fluorescent lamp or the like for illuminating the inside of the ornamental fish tank 41 is attached, and an upper part for turning on or off the fluorescent lamp is provided on the upper part. A switch 45 is provided, and a plug 46 is connected to the outlet 3.
1 connected.

Numeral 47 denotes an air pump, in which a plug 48 is connected to the outlet 31 and air bubbles are generated from an air stone 50 connected through a pipe 49 to dissolve air in water. Reference numeral 51 denotes a temperature setting device, in which a plug 52 is connected to the outlet 31 and sets the temperature of water to be heated by a heater submerged in the water. The plugs 43, 46, 48 and 52 have the same configuration as the connection plug P.

Next, the operation will be described. First, FIG.
As shown in the figure, the plug 1 connected to the outlet 31 is connected to the outlet C, and the plugs 43 and 4 are connected.
When 6, 48 and 52 are connected to the outlet 31, the respective parts operate and the switch 45 is operated to operate the ornamental fish tank 41.
The inside is illuminated, and the ornamental fish and the like are enjoyed.

When the plugs 43, 46, 48 and 52 are connected to the outlet 31, the protective tube 9 enclosing the thermistor 7 projects from the outlet main body 3 as shown in FIG. 43, 46, 48
When the connecting blades L of the plugs 43 and 52 are inserted into the receiving blade 4, the plugs 43, 46, 48 and 52 are
Since the protective tube 9 is pushed in against the urging force of No. 3, the protective tube 9 retreats in a state where the tip abuts between the connecting blades L.

Then, from outlet C to outlet 31
The power is supplied to the outlet 31 and the power is supplied to each part from the outlet 31. If the temperature of the contact portion between each of the plugs 43, 46, 48 and 52 and the outlet 31 is lower than the set temperature of the temperature comparison unit 20, The temperature detected by the thermistor 7 sealed in the protection tube 9 also becomes lower than the set temperature, and the temperature comparator 20 outputs a normal temperature signal.
1 does not energize the coil 15, the contact piece 16 is in the state of the solid line in FIG. 1, and the green lamp 17 is turned on. In the green lamp 17 thus lit, the contact portion between each of the plugs 43, 46, 48 and 52 and the outlet 31 has a temperature comparing section 20.
Indicates that the temperature is below the set temperature.

In this state, for example, tracking occurs in the contact portion between the plug 46 and the outlet 31 and the temperature rises, or the temperature of the contact portion between the plug 46 and the outlet 31 rises due to an overload and the temperature comparator When the temperature becomes equal to or higher than the set temperature of 20, the detected temperature of the thermistor 7 also becomes equal to or higher than the set temperature, and the temperature comparator 20 outputs an abnormal temperature signal.
The relay control unit 21 energizes the coil 15 and switches the contact piece 16 to the state shown by the dotted line in FIG. Therefore, each plug 4
The power to 3, 46, 48, and 52 is cut off, and the red lamp 18 is turned on, thereby confirming that the contact portion between at least one plug and the outlet 31 has exceeded the set temperature of the temperature comparison unit 20. indicate. Also,
The buzzer control unit 22 to which the abnormal temperature signal has been supplied causes the buzzer 23 to sound, and at least one plug and outlet 3
An alarm is issued to notify that the temperature of the contact portion with the temperature 1 has become equal to or higher than the temperature set by the temperature setting unit 20.

As described above, according to the first embodiment of the present invention, since the protective tube 9 in which the thermistor 7 is sealed is provided at the outlet, the thermistor 7 can be incorporated with a sufficient space. Since the thermistor 7 is sealed in the protection tube 9, the protection tube 9 can prevent the thermistor 7 from being damaged. Further, since the protection tube 9 is urged by the coil spring 13 to protrude from the outlet main body 3, even if the connection blade L is not completely inserted, the thermistor 7 via the protection tube 9 is connected to the connection plug P
, It is possible to reliably detect the temperature of the connection plug P.

When the temperature rises due to tracking or overload and the temperature exceeds the temperature set by the temperature comparison unit 20, the control circuit 19 operates the relay 14 to cut off the power supply to the connection plug P, and The buzzer 23 sounds to notify that the contact portion between the plug P and the outlet has become higher than the set temperature. Therefore, when the temperature of the contact portion between the outlet and the connection plug P rises above the set temperature due to tracking or overload, it is possible to quickly take a countermeasure and prevent the connection plug P from firing. be able to.

FIG. 3 is a schematic diagram showing the configuration of an outlet according to a second embodiment of the present invention, and the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals and description thereof is omitted. In FIG. 3, R indicates a connected outlet disposed on a wall or the like,
A connected outlet case H made of resin having electrical insulation properties, and a pair of connected receiving blades B provided in the connected outlet case H and supplied with electric power.

Reference numeral 1A denotes a plug, which is electrically insulating and has a resin plug case 24 and a plug case 2
4 and a pair of blades 25 connected to the connected receiving blade B of the connected outlet R. The blade 25 is connected to the above-described receiving blade 4 by the cord 2 and the control circuit 19A. Reference numeral 26 denotes a thermistor as a first temperature sensing element, which is buried in the plug case 24 so as to detect the temperature on the side facing the connected outlet case H,
The lead 27 is connected to the temperature comparator 20A of the control circuit 19A.

The thermistor 7 as a second temperature sensing element is connected to a temperature comparison section 20A of a control circuit 19A by a lead wire 8. Reference numeral 14 denotes a relay, and the contact piece 16 switches so as to be in a supply state in which the power from the plug 1A is supplied to the receiving blade 4 when the coil 15 is not energized, and the power from the plug 1A is supplied when the coil 15 is energized. The contact piece 16 is switched so as to be in a cut-off state in which supply is not performed to the receiving blade 4. 17
Indicates a green lamp indicating a normal state, and is lit when power is supplied from the plug 1A to the receiving blade 4. Reference numeral 18 denotes a red lamp for displaying an abnormal state, which lights up when power is not supplied from the plug 1A to the receiving blade 4.

Reference numeral 19A denotes a control circuit, for example, when the rated current of the outlet of this embodiment is 15A,
The first set temperature set to 0 degrees is compared with the detected temperature of the thermistor 26. If the detected temperature of the thermistor 26 is lower than the first set temperature, a normal temperature signal is output, and the detected temperature of the thermistor 26 becomes the second set temperature. When the temperature exceeds one set temperature, an abnormal temperature signal is output, and a second set temperature set to, for example, 100 degrees Celsius is compared with a detected temperature of the thermistor 7. If the detected temperature of the thermistor 7 is lower than the second set temperature, If so, a normal temperature signal is output, and when the detected temperature of the thermistor 7 becomes equal to or higher than the second set temperature, a temperature comparator 20A that outputs an abnormal temperature signal, and when the temperature comparator 20A outputs an abnormal temperature signal, A relay control unit 21 for energizing the coil 15 and controlling the coil 15 to an excited state;
When A outputs an abnormal temperature signal, the buzzer control unit 22 controls the buzzer 23 to sound.

FIG. 4 is an explanatory view showing the use state of the outlet according to the second embodiment of the present invention. The same parts as those in FIGS. In FIG. 4, reference numeral 31A denotes an outlet configured to be able to connect four plugs, and four sets from the receiving blade 4 to the coil spring 13 shown in FIG. 3 are provided.

Next, the operation will be described. First, FIG.
As shown in FIG.
A is supplied to the power supply A, and power is supplied to each part from the outlet 31A.
4 is lower than the first set temperature of the temperature comparison unit 20A, the detected temperature of the thermistor 26 also becomes lower than the first set temperature, and the connection plugs between the connection blades L in the respective plugs 43, 46, 48, and 52 The temperature of case O is the temperature comparison unit 2
When the temperature is lower than the second set temperature of 0 A, the detection temperature of the thermistor 7 sealed in the protection tube 9 also becomes lower than the second set temperature,
Since the temperature comparison unit 20A outputs a normal temperature signal, the relay control unit 21 does not energize the coil 15 and the contact piece 16
, And the green lamp 17 is turned on.

The lit green lamp 17 indicates that the temperature of each of the plug cases 24, O, the outlet main body 3 and the connected outlet case H is lower than the corresponding first or second set temperature. In this state, for example, when tracking occurs in the plug case 24 and the temperature rises, or when the temperature of the plug case 24 rises due to overload and becomes higher than the first set temperature, the detected temperature of the thermistor 26 also becomes the first set temperature. If the temperature rises due to the occurrence of tracking in the connection plug case O of the plug 46 or the temperature of the connection plug case O increases due to overload and becomes equal to or higher than the second set temperature, the detected temperature of the thermistor 7 Is also equal to or higher than the second set temperature, and the temperature comparison unit 20A outputs an abnormal temperature signal.
And the contact piece 16 is switched to the state shown by the dotted line in FIG.

Therefore, the power to each of the plugs 43, 46, 48 and 52 is cut off and the red lamp 1
Lighting of 8 indicates that the temperature has increased due to tracking or overload. In addition, the buzzer control unit 22 to which the abnormal temperature signal has been supplied sounds the buzzer 23 to notify that tracking or overload has occurred.
Raise an alarm and notify.

As described above, according to the second embodiment of the present invention, the thermistor 26 is buried in the plug case 24 and the protective tube 9 in which the thermistor 7 is sealed is provided in the outlet main body 3. , 7 can be incorporated with sufficient space. Since the thermistor 26 is buried in the plug case 24 and the thermistor 7 is sealed in the protective tube 9, it is possible to prevent the thermistor 26 from being damaged and to prevent the thermistor 7 from being damaged by the protective tube 9. be able to.

Further, the thermistor 26 is connected to the plug case 2
4, the temperature of the plug case 24 can be reliably detected. Further, since the protection tube 9 is urged by the coil spring 13 to protrude from the outlet main body 3, even if the connection blade L is not completely inserted, the thermistor 7 via the protection tube 9 can be connected to each of the plugs P, 43,. 46,48
And / or 52, so that the temperature of each plug P, 43, 46, 48 and / or 52 can be reliably detected.

Then, when the temperature rises due to tracking or overload and the temperature of each part becomes higher than the corresponding first or second set temperature, the control circuit 19A operates the relay 14, and the plugs P, 43, 46, 48 and The power supply to the power supply 52 is cut off, and the buzzer 23 sounds to notify that tracking or overload has occurred. Therefore, when tracking or overload occurs, a countermeasure can be taken promptly, and supply of power to the load is stopped, so that each plug 1A, P, 43, 46, 48, 5
2, the temperature between the blades 25 and L decreases, and the temperature between the receiving blades 4 of the outlet body 3 decreases.
P, 43, 46, 48, 52 and ignition from the outlet main body 3 can be prevented beforehand.

FIGS. 5A and 5B are perspective views from the blade side showing the appearance of an outlet according to a third embodiment of the present invention.
FIG. 5 is a perspective view from the receiving blade side, and the same or corresponding parts as in FIGS. Here, the outlet 31B of the third embodiment is such that the plug 1A of the second embodiment is provided integrally with the outlet main body 3. Outlet 3 of the third embodiment
The operation, operation, effects, and the like of 1B are the same as those in the second embodiment, and thus description thereof is omitted. Note that the plug of the first embodiment may also be provided integrally with the plug body 3 of the plug.

FIG. 6 is a schematic diagram showing the configuration of an outlet according to a fourth embodiment of the present invention. In FIG. 6, reference numeral 61 denotes a plug, a plug case 62 made of resin having electrical insulation, and a pair of blades 63 provided in the plug case 62 and connected to the connected receiving blade B of the connected outlet R. , A thermistor 66, a protection tube 68, a stopper 70, a coil spring 72, and the like, which will be described later. The blade 63 is connected by a cord 2 to the receiving blade 4 and the control circuit 19A.

The plug case 62 has a flange 69 provided on a protective tube 68 made of an insulating material in which a thermistor 66 is sealed.
A through hole 64 having a step 65 with which the blade 63 comes into contact is provided between the blades 63. The thermistor 66 as the first temperature sensing element is connected to the temperature comparison unit 20A of the control circuit 19A by a lead 67. Also, the plug case 62
An annular stopper 70 having a through hole 71 screwed or welded to the rear end portion of the through hole 64 allows the protective tube 68 to enter and exit the through hole 71.

Further, a coil spring 72 as an urging member is mounted between the flange 69 of the protective tube 68 and the stopper 70, and the flange 69 of the protective tube 68 abuts the step 65 of the through hole 64. It is urged to make it happen. In a state where the flange 69 of the protection tube 68 is in contact with the step 65 of the through hole 64, the tip of the protection tube 68 protrudes from the plug case 62 by, for example, about 7 mm.

The operation and operation of the outlet according to the fourth embodiment are the same as those of the second embodiment, and therefore the description is omitted.

According to the fourth embodiment of the present invention, the protective tube 68 enclosing the thermistor 66 is disposed in the plug case 62, and the protective tube 9 enclosing the thermistor 7 is disposed in the outlet main body 3. The thermistors 66 and 7 can be incorporated with sufficient space. Since the thermistors 66 and 7 are sealed in the protection tubes 68 and 9, the protection tubes 68 and 9 can prevent the thermistors 66 and 7 from being damaged.

Further, the protection tube 68 is connected to the coil spring 7
2 to protrude from the plug case 62,
Is urged by the coil spring 13 to protrude from the outlet main body 3, so that the thermistors 66, 7 via the protection tubes 68, 9 even if the blades 63, L are not completely inserted.
Can be brought into contact with the connected outlet R and the connection plug P, so that the temperatures of the connected outlet R and the connection plug P can be reliably detected.

When the temperature rises due to tracking or overload and the temperature of each part becomes equal to or higher than the corresponding first or second set temperature, the control circuit 19A operates the relay 14 to cut off the power supply to the connection plug P and The buzzer 23 sounds to notify that tracking or overload has occurred. Therefore, in the event of tracking or overload, it is possible to quickly take a countermeasure and to stop supplying power to the load.
Since the temperature between the blades 63 and L of the sockets 1 and 1 decreases and the temperature between the receiving blades 4 of the outlet body 3 decreases, the plug 6
It is possible to prevent fire from occurring from 1, P, the outlet main body 3 and the connected outlet case H.

Also in this embodiment, as shown in FIG. 5, the plug 61 may be provided integrally with the outlet main body 3.

FIG. 7 is a schematic structural view showing an outlet according to a fifth embodiment of the present invention, and FIG. 8 is an external perspective view showing a state where the outlet according to the fifth embodiment shown in FIG. 7 is arranged on a wall. 1 to 6 are denoted by the same reference numerals and description thereof is omitted. In these figures, 28 is an AC power source distributed from indoor wiring or the like, 31C is an outlet provided on the wall W in the building, and the outlet 31C is
The power is supplied from the AC power supply 28 via the cord 2.

Reference numeral 80 denotes a control circuit, for example, 100 degrees Celsius.
When the detected temperature of the thermistor 7 is lower than the set temperature, a normal temperature signal is output, and when the detected temperature of the thermistor 7 becomes higher than the set temperature, A temperature comparing section 81 that outputs an abnormal temperature signal, a holding circuit 82 that holds the output of the temperature comparing section 81, and a coil 15 of the relay 14 that is energized and energized by the abnormal temperature signal from the holding circuit 82. A relay control unit 83 for controlling, a buzzer control unit 84 for controlling the buzzer 23 to a sounding state by an abnormal temperature signal from the temperature comparison unit 81, and a holding state of the holding circuit 82 are released to supply power to the connection plug P. And a reset switch 85 as a return means for returning to a state in which the buzzer 23 stops sounding.

Next, an operation different from the above-described embodiments will be described. Note that an AC voltage is constantly applied to the pair of receiving blades 4 of the outlet main body 3. First, when tracking or overload does not occur, the temperature detected by the thermistor 7 becomes lower than the set temperature, and the temperature comparator 81
Outputs a normal temperature signal to the holding circuit 82,
Outputs a normal temperature signal to the relay control unit 83 and the buzzer control unit 84, so that the relay control unit 83 does not energize the coil 15, the contact piece 16 becomes a solid line in FIG. 7, and the green lamp 17 is turned on. This indicates that power can be supplied to the connection plug P.

However, when tracking or overload occurs and the temperature detected by the thermistor 7 exceeds the set temperature,
The temperature comparing section 81 outputs the abnormal temperature signal to the holding circuit 82, and the holding circuit 82 outputs the abnormal temperature signal to the relay control section 83 and the buzzer control section 84.
3 indicates that the coil 15 is energized, the contact piece 16 is switched to the state shown by the dotted line in FIG. 7 , the power to the connection plug P is cut off, and the red lamp 18 is turned on, so that tracking or overload has occurred. Is displayed. Further, the buzzer control unit 84 to which the abnormal temperature signal has been supplied is connected to the buzzer 23.
And an alarm is issued to notify that tracking or overload has occurred.

Here, since the reset switch 85 is provided in the control circuit 80, if a tracking or overload occurs, a countermeasure is taken and then the reset switch 85 is set.
By operating 5, the holding state of the holding circuit 82 is released, and power can be supplied to the connection plug P.
The buzzer 23 returns to the state where the sound stops. That is, in the outlet of each embodiment described above, the control circuit 1
Although it is possible to return 9, 19A, the outlet 31C according to the fifth embodiment is provided with a return means since it is practically impossible to cut off the power supply system.

It is to be noted that a two-state selection circuit such as an RS flip-flop is used as the holding circuit 82, and a signal potential which is grounded by turning on the reset switch 85 is supplied as negative logic to the reset terminal.
The reset switch 2 and the reset switch 85 can be configured in any manner using a known logic circuit or the like.

By providing the return means in this way, there is no need to go to the connection source of the outlet and pull out the outlet in order to cut off the power supply system of the outlet in which tracking or overload has occurred. Can be restored. In order to prevent the reset switch 85 from being operated mischievously, for example, a small hole 86 is formed in the outlet main body 3, and a toothpick or the like is inserted through the small hole 86 so that the reset switch 85 can be turned on. You may. In addition, the outlet 31 arranged on the wall W
However, the AC power supply 28 may be replaced with a normal plug, or the plug may be provided integrally with the outlet main body 3 to be integrated.

[0050] Figure 9 is a schematic block diagram showing a configuration <br/> cents a sixth embodiment of the present invention, its description is omitted with the same reference numerals to the same parts as FIGS. 1-8. In FIG. 9, 8
Reference numeral 0A denotes a control circuit which compares a set temperature set at, for example, 100 degrees Celsius with a detected temperature of the thermistor 7 or a detected temperature of the thermistor 7 via a pin receiving blade 93 and a lead wire 8A described later. If the detected temperature is lower than the set temperature, a normal temperature signal is output. If the detected temperature of the thermistor 7 is higher than the set temperature, a temperature comparator 81A that outputs an abnormal temperature signal and an output of the temperature comparator 81A are output. A holding circuit 82 for holding, a relay control unit 83 for energizing the coil 15 of the relay 14 to control an excited state by an abnormal temperature signal from the holding circuit 82, and a temperature comparing unit 8
The buzzer control unit 84 that controls the buzzer 23 to sound according to the abnormal temperature signal from 1 and the holding state of the holding circuit 82 is released to enable power supply to the connection plug P and stop the sound of the buzzer 23. And a reset switch 85 as a return unit for returning to a state in which the switch is reset.

Reference numeral 91 denotes an outlet main body, in which a pair of receiving blades 4 for receiving a pair of connecting blades L are provided, and a protective tube 9 in which a thermistor 7 as a temperature sensing element is sealed is biased by a biasing member such as a coil spring. It is biased in the protruding direction. Note that the temperature signal from the thermistor 7 is supplied to the temperature comparison unit 81A of the control circuit 80A via the lead wire 8, so that occurrence of tracking or overload can be detected as described above.

The socket body 91 is provided with pin receiving blades 93 in a pair of pin insertion holes 92 as temperature signal relay means, and each of the pin receiving blades 93 is a lead wire 8.
A is connected to the temperature comparison section 81A of the control circuit 80A via A, and based on the temperature signal supplied via the pin receiving blade 93, the control circuit 80A performs tracking, overload detection, power supply cutoff processing and notification processing. It is possible.

Reference numeral 94 denotes an extension cord for extending a power supply path to the connection plug P, and includes an extension plug 94a, an extension plug receiver 94b, an extension plug 94a and an extension plug receiver 94b.
And a cable 94c for connecting. The extension plug 94a includes a pair of connection blades L and a pair of connection pins 95 as temperature signal relay means that can be inserted into the pin insertion hole 92 of the outlet main body 91.

In the extension plug receiver 94b, a thermistor 7 as a temperature sensing element can be protruded and retracted by a biasing means such as a spring between a pair of receiving blades 4 receiving a pair of connecting blades L. Further, the cable 94c is connected to the extension plug receiver 94b.
A power supply line 96 connecting the receiving blade 4 of the extension plug 94a and the connection blade L of the extension plug 94a, and a temperature signal line 9 connecting the thermistor 7 of the extension plug receiver 94b and the connection pin 95 of the extension plug 94a.
7 is provided.

Therefore, the extension cord 94 is connected to the outlet main body 91 and the extension plug receiver 94 of the extension cord 94 is connected.
When the connection blade L of another connection plug P is inserted into the reception blade 4 of b, the thermistor 7 of the extension plug receiver 94b abuts between the connection blades L and is pushed in against the urging force of the spring,
Connection plug case O or extension plug receiver 9 between receiving blades 4
When the tracking or overload occurs in 4b and the temperature rises, the temperature rise is detected by the thermistor 7 provided in the extension plug receiver 94b, and the temperature signal line 97 of the cable 94c, the connection pin 95 of the extension plug 94a, the outlet body The temperature is supplied to the temperature comparing section 81A via the pin receiving blade 93 of the first member 91 and the lead wire 8A.

That is, the extension cord 94 itself does not have a tracking or overload occurrence detection function or a power supply path shutoff means or a notification means based on the tracking or overload detection, and the tracking or overload is performed by the function of the outlet main body. This makes it possible to detect the load, cut off the power supply path, and perform notification.

Since a temperature-sensitive element such as a thermistor indicating a resistance change accompanying a temperature change is used, the temperature signal is
Since it is necessary to individually supply the temperature comparing section 81A from each of the temperature sensing elements, when a table tap is used instead of the extension cord 94, or when the extension cord has a structure in which an extension cord can be further connected, It is necessary to provide a temperature signal line corresponding to the number of temperature sensing elements to be connected and a temperature signal relay means for relaying the same. For example, in the case of a table tap having four outlets, a temperature signal line for guiding a signal from the temperature sensing element of each outlet to the plug is provided by four.
And four sets of temperature signal relay means corresponding to the four sets of temperature signal lines are provided on the plug, and the four sets of temperature signal relay means are connected to the outlets so that the four sets of temperature signal relay means can be connected to each other. It is provided on the main body.

In the outlet of the sixth embodiment, the outlet main body 91 is provided with the temperature relay means and the temperature sensing element. However, for example, only the temperature signal relay means may be provided. Although the outlet is provided on the wall W, the AC power supply 28 may be replaced with a normal plug, or the plug may be provided integrally with the outlet body to be integrated.

FIG. 10 is a schematic structural view showing an outlet according to a seventh embodiment of the present invention, which corresponds to the first embodiment of FIG. 1, and the same parts as those of FIG. Is omitted. In FIG. 10, reference numeral 19B denotes a control circuit which compares a set temperature set at, for example, 100 degrees Celsius with a detected temperature of the thermistor 7, and outputs a normal temperature signal when the detected temperature of the thermistor 7 is lower than the set temperature. When the detected temperature of the thermistor 7 becomes equal to or higher than the set temperature, the temperature comparing section 20 for outputting an abnormal temperature signal and the temperature comparing section 2
An OR circuit 102 that outputs the supplied signal by supplying an abnormal temperature signal from 0 and / or a leakage signal from a leakage detection unit 101 described later, and the OR circuit 10
When the abnormal temperature signal and / or the leakage signal are supplied from the relay unit 2, the relay control unit 21 </ b> A that energizes the coil 15 of the relay 14 to control the coil to an excited state, and the abnormal temperature signal and / or the leakage detection unit from the temperature comparing unit 20. An OR circuit 103 that outputs the supplied signal when a leakage signal is supplied from 101, and controls the buzzer 23 to sound when an abnormal temperature signal and / or a leakage signal is supplied from the OR circuit 103. The buzzer control unit 22A and a leakage
Detecting leakage based on the signal from the current detecting element 100A, 100B is, the leakage detection unit 101 for outputting a leak signal
It is composed of

Reference numerals 100A and 100B denote leakage current detecting elements for detecting a leakage current downstream of the receiving blade 4. When no leakage occurs, the reciprocating currents are equal, so that no voltage is induced, and leakage occurs. When this occurs, the round-trip currents are not equal, so that a voltage is induced to cause a leakage signal, which can be configured using, for example, a zero-phase current transformer. It should be noted that although the leakage current detecting element is illustrated as if it were composed of two elements, the code 2 is vertically separated, so this is indicated.

Next, an operation different from the above embodiments will be described. In this embodiment, when a leakage occurs downstream of the receiving blade 4, the leakage current detecting element 100
Since A and 100B output a predetermined voltage, the leakage detection unit 101 supplied with the predetermined voltage outputs a leakage signal to each of the OR circuits 102 and 103. Therefore, even when a short circuit occurs, the supply of power to the downstream side of the receiving blade 4 is cut off and the buzzer 23 sounds, similar to the case where tracking or overload occurs, and an abnormality occurs. Can be notified, all accidents caused by electricity can be prevented beforehand, and countermeasures can be taken.

In order for the second to sixth embodiments to have the same effect as that of this embodiment, the leakage current detecting elements 100A, 100A, 100A, and 100A, at positions a and b shown in FIGS. 3, 6, 7, and 9, respectively. 100
B may be provided to supply the output of the leakage detecting unit 101 to the relay control units 21 and 83 and the buzzer control units 22 and 84 via the OR circuits 102 and 103, or to the holding circuit 82 via the OR circuit. . In such a configuration, the OR circuit can be omitted.

In each of the above-described embodiments, an example has been described in which the protective tube 9 protrudes 7 mm from the outlet main body 3 and the protective tube 68 protrudes 7 mm from the plug case 62. However, each of the plugs 61 and P is exposed. In the range of 1/10 to 1/2 of the length of each blade 63, L, that is, each plug 61, P generally used at home, since the blade 63, L is exposed by about 18 mm, the protective tube is provided. 68, 9 from 1.8mm to 9
If the plug 61 and the plug P are projected from the plug case 62 and the outlet main body 3 in the range of
By inserting the protective tubes 68 and 9 into the cases H and O, the ends of the protective tubes 68 and 9 can be brought into contact with the cases H and O without fail.

The protection tubes 68, 9 and the thermistors 66, 7 can be prevented from being damaged by reducing the amount of protrusion of the protection tubes 68, 9 within the above-mentioned range. Furthermore, thermistors 26, as first and second temperature sensing elements,
Although 66 and 7 have been described as examples, it goes without saying that any other device can be used as long as the output changes as the temperature changes. Thermistor 66,
7 has been described in the protective tubes 68 and 9, but those which do not need to be sealed in the protective tubes 68 and 9 are described.
When the first and second temperature sensing elements are exposed, the blade 6 exposing the first and second temperature sensing elements is not necessary.
3, it may be protruded from the plug case 62 and the outlet main body 3 in the range of 1/10 to 1/2 of the length of L.

Although the relay circuit has been described as an example of the switch circuit, a switch such as a semiconductor switch may be used. Further, the example in which the buzzer 23 is used as the alarm device has been described, but any other alarm device that can notify a dangerous state may be used. In addition, the first set temperature is set to 12 degrees Celsius.
Although the description has been made with an example in which the temperature is set to 0 degrees and the second set temperature is set to 100 degrees Celsius, it is desirable to change each set temperature according to the rated current of the outlet.
62, O, it is necessary to lower the ignition temperature of the outlet body 3.

In the first embodiment, the outlet may be constituted only by the outlet main body 3, the thermistor 7, and the coil spring 13. Further, in the second embodiment, the outlet may be constituted only by the outlet main body 3, the thermistor 7, the coil spring 13, and the plug 1A.

[0067]

As described above, according to the present invention, since the temperature-sensitive element is provided in the outlet, the temperature-sensitive element can be incorporated with a sufficient space. The temperature-sensing element is urged by the urging member to protrude from the outlet main body, so that the temperature-sensing element can be brought into contact with the plug even if the plug blade is not completely inserted, so that the temperature of the plug can be reliably maintained. , And tracking or overload is determined based on the detected temperature, so that a countermeasure can be taken.

Further, when the temperature rises due to tracking or overload and the temperature exceeds the set temperature of the control circuit, the control circuit operates the switch circuit to cut off the power supply to the plug. When the temperature of the contact portion between the plug and the plug rises above the set temperature, the power supply can be cut off before the plug or the outlet ignites.

Further, when the temperature due to tracking or overload exceeds the set temperature, the control circuit operates the alarm to notify that the plug has exceeded the set temperature.
Responsive action can be taken promptly. By providing the return means for stopping the operation of the control circuit, the operation for stopping the alarm device or restarting the power supply is simplified.

Next, since the return means is provided, it is possible to return by a simple operation. And, since a structure for blocking the detecting and feeding to plug the leak, with all accidents due to electrical can be prevented, Ru can take corrective action.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an outlet according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a use state of the outlet according to the first embodiment of the present invention.

FIG. 3 is a schematic configuration diagram showing an outlet according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a use state of an outlet according to a second embodiment of the present invention.

FIGS. 5A and 5B are a perspective view from a blade side and a perspective view from a receiving blade side showing an external appearance of an outlet according to a third embodiment of the present invention.

FIG. 6 is a schematic configuration diagram showing an outlet according to a fourth embodiment of the present invention.

FIG. 7 is a schematic configuration diagram showing an outlet according to a fifth embodiment of the present invention.

FIG. 8 is an external perspective view of a state where an outlet according to a fifth embodiment of the present invention is provided on a wall.

9 is a sixth schematic diagram to indicate <br/> the outlet which is an embodiment of the present invention.

FIG. 10 is a schematic configuration diagram showing an outlet according to a seventh embodiment of the present invention.

[Explanation of symbols]

1, 1A, 61 Plug 2 Cord 3, 91 Outlet main body 4 Receiving blade 5, 12, 64, 71 Through hole 6, 65 Step 7, 26, 66 Thermistor 8, 8A, 27, 67 Lead wire 9, 68 Protection tube 10, 69 Flange part 11, 70 Stopper 13, 72 Coil spring 14 Relay 15 Coil 16 Contact piece 19, 19A, 19B, 80, 80A Control circuit 20, 20A, 81, 81A Temperature comparison part 21, 21A, 83 Relay control part 22, 22A, 84 Buzzer control unit 23 Buzzer 24, 62 Plug case 25, 63 Blade 28 AC power supply 31, 31A, 31B, 31C Outlet 82 Holding circuit 85 Reset switch 92 Pin insertion hole 93 Pin receiving blade 94 Extension cord 94a Extension plug 94b Extension plug receiver 94c Cable 95 Connection pin 96 Power supply line 7 temperature signal lines 100A, 100B leakage current detecting element 101 leakage detection unit 102 and 103 an OR circuit P connection plug O connection plug case L connecting edge R a connected outlet B to be connected receiving blade H a connected outlet casing

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-93874 (JP, A) JP-A-54-38587 (JP, A) JP-A-63-131475 (JP, A) 109278 (JP, U) Japanese Utility Model Showa 64-37337 (JP, U) Japanese Utility Model Showa 63-164185 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 13/66-13 / 719 H01R 25/00 H02H 5/04

Claims (12)

(57) [Claims] 1. An outlet body containing a pair of receiving blades for receiving a pair of connecting blades of a connecting plug, a temperature-sensitive element protruding between the receiving blades of the outlet body so as to be able to protrude and retract, and the temperature-sensitive element. An urging member for urging the electric power so as to protrude from the outlet main body , and a switch for supplying and interrupting electric power to the receiving blade
When the temperature signal from the circuit and the temperature-sensitive element is equal to or higher than a set temperature,
Supplying power to the receiving blade by operating the switch circuit
And a control circuit for shutting off the leakage current, a leakage current detection for detecting a leakage current downstream of the receiving blade.
An output element, and the control circuit outputs a leakage signal from the leakage current detection element.
When supplied, the switch circuit is operated to
An outlet , which cuts off power supply to a receiving blade . 2. A pair receiving a pair of connection blades of a connection plug.
And an outlet main body in which a receiving blade is provided, and the outlet main body protrudes and protrudes between the receiving blades of the outlet main body.
A temperature sensing element, and projecting the temperature sensing element from the outlet body.
A biasing member for biasing , and a switch for supplying and interrupting power to the receiving blade
When the temperature signal from the circuit and the temperature-sensitive element is equal to or higher than a set temperature,
Supplying power to the receiving blade by operating the switch circuit
And a control circuit for shutting off the temperature before the temperature signal from the temperature sensing element becomes higher than a set temperature.
And an alarm device operated by the output of the control circuit.
In the outlet, a leakage current detection element for detecting a leakage current downstream of the receiving blade is provided, and the control circuit operates the switch circuit even when a leakage signal is supplied from the leakage current detection element. An outlet, wherein the supply of electric power to the blade is cut off and the alarm device is operated even when a leakage signal is supplied from the leakage current detection element. 3. A plug having a pair of blades connected to a pair of connected receiving blades of a connected outlet, a first thermosensitive element provided on a plug case of the plug and detecting a temperature between the blades. An outlet body internally connected to the plug via a cord and receiving a pair of connection blades of the connection plug; and a second temperature sensing member protruding between the receiving blades of the outlet body so as to be able to protrude and retract. An outlet comprising: an element; and an urging member for urging the second temperature-sensitive element so as to protrude from the outlet main body. 4. A receptacle according to claim 3, wherein the first temperature sensitive device is characterized retractable to protrude biased by the biasing member, it between the blade outlet. 5. A receptacle according to claim 3 or claim 4, wherein the plug is characterized in that is provided integrally with the outlet body outlet. 6. The outlet according to claims 3 to any one of claims 5, power supply state to the receiving blade, and a switch circuit for the cut-off state, the temperature from the first temperature sensitive element When the signal becomes equal to or higher than the first set temperature, or when the temperature signal from the second
An outlet, comprising: a control circuit that, when the temperature becomes equal to or higher than a second set temperature lower than the set temperature, activates the switch circuit to cut off the supply of power to the receiving blade. 7. A receptacle according to claim 6, provided with a return means for releasing the operation of the control circuit, and wherein the outlet. 8. A receptacle according to claim 6 or claim 7, wherein the output of the control circuit temperature signal is equal to or higher than first set temperature from the first temperature sensitive element, or the second temperature sensitive device An outlet that is activated by an output of the control circuit when a temperature signal from the controller becomes equal to or higher than a second set temperature. 9. The outlet according to claims 6 to any one of claims 8, a leakage current detecting element for detecting the leakage current of the downstream side of the receiving blade provided, wherein the control circuit, the leakage An outlet, wherein even when a leakage signal is supplied from a current detection element, the switch circuit is operated to cut off supply of power to the receiving blade. 10. The outlet according to claim 8 , further comprising: a leakage current detecting element for detecting a leakage current downstream of the receiving blade, wherein the control circuit is supplied with a leakage signal from the leakage current detecting element. In this case, the power supply to the receiving blade is cut off by operating the switch circuit, and the alarm is operated even when a leakage signal is supplied from the leakage current detection element. Outlet. 11. A socket body containing a pair of receiving blades for receiving a pair of connecting blades of a connecting plug, a temperature signal relay means for relaying a temperature signal supplied through the connecting plug, and power to the receiving blade. A supply circuit, a switch circuit for setting a cut-off state, and when a temperature detected based on a temperature signal supplied through the temperature signal relay unit becomes equal to or higher than a set temperature, the switch circuit is operated to apply a voltage to the receiving blade. A control circuit for interrupting the supply of electric power, and a control circuit that protrudes and retracts between the receiving blades of the outlet main body.
A temperature sensing element, and projecting the temperature sensing element from the outlet body.
An urging member for urging, wherein the control circuit is configured to transmit a temperature signal from the thermosensitive element to a set temperature.
If the temperature is higher than or equal to
Outlet, characterized in that, to cut off the power supply to the receiving blades. 12. A plug having a pair of blades connected to a pair of connected receiving blades of a connected outlet, a first temperature-sensitive element provided in a plug case of the plug and detecting a temperature between the blades. A pair of receiving blades connected to the plug via a cord and receiving a pair of connecting blades of the connecting plug, an outlet body containing temperature signal relay means for relaying a temperature signal supplied through the connecting plug, A switch circuit for supplying and interrupting power to the receiving blade; and a temperature supplied when a temperature signal from the first temperature sensing element is equal to or higher than a first set temperature or via the temperature signal relay unit. When the signal becomes equal to or higher than a second set temperature which is lower than the first set temperature, the control circuit that operates the switch circuit to cut off the supply of power to the receiving blade, and can be protruded and retracted between the receiving blade of the outlet main body. Protruding put out
A second temperature sensing element, and projecting the second temperature sensing element from the outlet main body.
An urging member that urges the temperature signal from the second thermosensitive element.
2 When the temperature exceeds the set temperature, the switch circuit is activated.
By work to cut off the power supply to the receiving blades, outlet, characterized in that.