JP3511266B2 - Apparatus provided with power supply means for external equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus provided with a power supply means for external equipment, which makes power available from the outside.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIG. 6, a copying machine 100 is equipped with a plug 50 for receiving electric power from an external AC power source 40. In addition, the copier 100 has a side plate 20, an external device power supply means,
For example, a service outlet 30 is provided. The service outlet 30 is an outlet for supplying electric power to peripheral equipment related to the copying machine, such as a sorter, or various equipment such as a cleaner.

[0003]

By the way, when a copying machine is used overseas, the voltage obtained from the AC power source 40 is often different due to the difference in the countries or the regions. Further, the voltage obtained may vary depending on the difference in time zone. In such a case, the voltage obtained from the service outlet 30 also differs from the desired voltage. Even if the copying machine is provided with a margin that can cope with such a difference or fluctuation in power supply voltage, the number of types of devices connected to the service outlet 30 is in principle unlimited, so that such a power supply is used. Many devices do not have a processing mechanism that can handle voltage differences and fluctuations. Therefore, there is a problem that connecting such a device to the service outlet 30 may cause a failure, which may lead to a serious accident such as a fire in some cases.

The present invention takes into consideration the problems of the conventional apparatus provided with the power supply means for external equipment and takes into consideration a predetermined demand even if it is used overseas or the power supply voltage fluctuates. It is an object of the present invention to provide an apparatus equipped with a power supply means for an external device, which can take out a voltage and can stop it to prevent an accident.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a voltage detecting means for detecting a voltage at a predetermined portion of a circuit from the voltage varying means to the power supply means for an external device, and a detection voltage from the voltage detecting means are previously set. If it exceeds the permissible range by comparing with a predetermined reference voltage, a control means for controlling the power supply to the external device power supply means and an abnormality display means for notifying that the permissible range is exceeded are provided. It is an equipped device.

Further, according to the present invention, the voltage varying means can be used to operate an external device.
Voltage detection means for detecting a voltage at a predetermined portion of the circuit up to the electric power supply means, and the detected voltage from the voltage detection means is compared with a predetermined reference voltage so that the voltage is outside the allowable range. The apparatus is provided with a control means for controlling the power supply to the equipment power supply means and an abnormality display means for notifying that the detected voltage exceeds an allowable range. In addition, the present invention provides a power supply for external equipment from the voltage varying means.
The voltage detecting means for detecting the voltage at a predetermined portion of the circuit up to the force supplying means, and the detected voltage from the voltage detecting means are compared with a predetermined reference voltage, and the external device so as to be within an allowable range. Control means for controlling the supply of electric power to the electric power supply means, and if the control does not fall within the permissible range, the control means for stopping the electric power supply to the electric power supply means for external equipment and the detection voltage are within the permissible range. The device is provided with an abnormality display means for notifying that the temperature has exceeded the limit.

[0007]

According to the present invention, the voltage detecting means detects the voltage at a predetermined portion of the circuit from the voltage varying means to the external device power supply means, and the control means detects the voltage from the voltage detecting means. If the detected voltage is compared with a predetermined reference voltage and exceeds the allowable range, the power supply to the external device power supply means is stopped, and the abnormality display means exceeds the allowable range to the outside. Let me know.

Further, the present invention provides the voltage detecting means,
The voltage at a predetermined location of the circuit from the voltage varying means to the external device power supply means is detected, the control means compares the detected voltage from the voltage detection means with a predetermined reference voltage, and the voltage is within the allowable range. The power supply to the power supply means for the external device is controlled so that the power is contained. Further, according to the present invention, the voltage detecting means detects the voltage at a predetermined portion of the circuit from the voltage varying means to the external device power supply means, and the control means predetermines the detected voltage from the voltage detecting means. The power supply to the external device power supply means is controlled so that it falls within the allowable range compared with the reference voltage, and if the controlled voltage does not fall within the allowable range, the external device power supply means The power supply to the device is stopped, and the abnormality display means notifies the outside that the allowable range has been exceeded.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic wiring diagram of a copying machine which is an embodiment of an apparatus having a power supply means for external equipment according to the present invention.

As is apparent from the drawing, the copying machine according to the present invention has a connecting means 2 such as a plug as an example of an AC power input means for taking in AC power from an external AC power supply 1. The connecting means 2 is connected to a load 4 such as a driving motor via a DC power source 3 having a rectifying circuit or the like so that electric power can be supplied.
At the same time, the connecting means 2 is connected to the primary side of the transformer 5. The secondary side of the transformer 5 is connected to a service outlet 7 as an example of an external device power supply means via a disconnecting relay contact 6. Further, the secondary side of the transformer 5 is connected to a voltage detecting means 8 which is composed of a rectifier, a resistor, a capacitor and the like, and which detects the voltage on the secondary side. Further, the voltage signal detected by the voltage detection means 8 is output to the control circuit 9. The control circuit 9 inputs the voltage signal from the voltage detecting means 8, compares it with a predetermined reference voltage, and when it exceeds the allowable range, for example, when it exceeds the ± 20% allowable range for 100 volts. Is a circuit for outputting a control signal for stopping the supply of electric power to the service outlet 7. The driver circuit 10 receives the control signal and receives the control signal.
The relay coil 12 is driven via 1. The relay coil 12 turns on and off the disconnecting relay contact 6. These control circuit 9 and driver circuit 1
0, the transistor 11, the relay coil 12, and the disconnecting relay contact 6 constitute a control means. Further, the driver circuit 10 receives the control signal from the control circuit 9 and uses the LED element 13 which is an example of the display means to output a signal to the outside indicating that the allowable range has been exceeded. There is.

Next, the operation of the above embodiment will be described. The connecting means 2 of the copying machine is connected to the external AC power supply 1. As a result, power is supplied to the load 4 for the time being, and copying becomes possible. On the other hand, the voltage supplied from the AC power supply 1 is supplied to the service outlet 7 via the transformer 5 and the disconnecting relay contact 6. Therefore, a vacuum cleaner or the like can be used by using the service outlet 7. Further, the voltage detecting means 8 detects the secondary side voltage of the transformer 5 and constantly outputs the detected voltage signal to the control circuit 9. Further, the control circuit 9 compares the magnitude of the voltage signal with a preset reference voltage value.

By the way, there is no particular problem when the voltage of the external AC power supply 1 is as planned, but in the case of wiring in a building, there are cases where the voltage has a considerably special value. In such a case, the voltage detecting means 8 detects the secondary side voltage of the transformer 5 and outputs it to the control circuit 9, and the control circuit 9 compares it with the reference voltage value. The voltage value multiplied by the ratio is compared with the reference voltage value, and a control signal indicating an abnormality is output. Therefore, the driver circuit 10 drives the relay coil 12 to turn off the disconnection relay contact 6. As a result, electric power is not supplied to the service outlet 7, and there is no concern that an abnormally large voltage will be generated there. Therefore, even if a vacuum cleaner or the like is connected, there is no fear that the vacuum cleaner will be broken. Also,
The driver circuit 10 notifies the operator of the abnormality by driving the LED elements 13 at the same time.

As shown in FIG. 2, a manual selector switch 111 is provided on the primary side of the transformer 5, and when the operator knows an abnormality, the selector switch 11 is provided.
1 may be switched so that an appropriate voltage can be obtained. Alternatively, as shown in FIG. 3, two wires are provided on the primary side of the transformer 5 so as to change the transformation ratio, and the respective connectors 17 and 18 are attached to the side plate 14 in the copying machine, while the harness 16 in the machine is connected to them. Connector 1
7 and 18 may be freely replaceable.

FIG. 4 is a circuit diagram showing another embodiment of the present invention. The same parts as those of the circuit of FIG. In the figure, 20 is a changeover switch for changing the transformation ratio of the transformer 5. On the other hand, the control circuit 20 receives the voltage signal from the voltage detection means 8, compares it with the reference voltage, and outputs the control signal to the driver circuit 22 so that the voltage falls within the allowable range. The driver circuit 22 receives the control signal and receives the control signal.
1. The relay coil 12 is driven, and the changeover switch 20 is changed over so that the detected voltage falls within the allowable range.

FIG. 5 is a circuit diagram showing another embodiment of the present invention. This may be the case that even if the changeover switch 20 is switched as in the embodiment of FIG. 4, the detected voltage still does not fall within the allowable range. In such a case, this is a circuit that can stop the supply of electric power to the service outlet 7. That is, the disconnection relay contact 6 of FIG. 1 is added to the present embodiment of FIG. 4, and when the control circuit 23 does not fall within the allowable range, the driver circuit 24 is driven to drive the transistor 26 and the relay coil 25. Then, the cutting relay contact 6 is turned off.

The device provided with the power supply means for external equipment of the present invention is not limited to the above-mentioned copying machine, and may be an image forming device such as a printer or a facsimile, or another device. The external device power supply means of the present invention is not limited to the above service outlet, and may be any other means as long as it can supply power to an external device. The voltage detecting means of the present invention is not limited to the use of rectifier, yet good by other means.

Although the control means of the present invention may be a dedicated hardware circuit having each function, it is usually realized by using a microcomputer. Further, the abnormality display means of the present invention is not limited to the LED element, and any means such as a liquid crystal element or a buzzer may be used as long as it can notify the abnormality.

[0019]

As described above, the device provided with the power supply means for external equipment according to the present invention compares the detected voltage from the voltage detection means with a predetermined reference voltage, and when the voltage exceeds the allowable range, , To stop the supply of power to the external device power supply means, or to stay within the allowable range,
Controls the supply of power to the external device power supply means,
Alternatively, the power supply to the external device power supply means is controlled so that the power falls within the allowable range, and if the power does not fall within the allowable range, the power supply to the external device power supply means is stopped. Since it is equipped with a control means capable of controlling, even if it is used in an area where the power supply voltage varies greatly, or even if the power supply voltage fluctuates, a predetermined desired voltage can be taken out or stopped to prevent an accident. It has the advantage that

[Brief description of drawings]

FIG. 1 is a schematic circuit diagram showing an embodiment of an apparatus according to the present invention.

FIG. 2 is a circuit diagram showing a part of an embodiment of another device according to the present invention.

FIG. 3 is a circuit diagram showing a part of another embodiment of the present invention.

FIG. 4 is a schematic circuit diagram showing another embodiment of the device according to the present invention.

FIG. 5 is a schematic circuit diagram showing another embodiment of the device according to the present invention.

FIG. 6 is a schematic front view showing a copying machine provided with a conventional service outlet.

[Explanation of symbols]

1 External AC Power Supply 2 Connection Means (AC Power Input Means) 5 Transformer 6 Relay Contact for Disconnection 7 Service Outlet (Power Supply Means for External Equipment) 8 Voltage Detection Means 9 Control Circuit 13 LED Element (Abnormality Display Means)

   ─────────────────────────────────────────────────── ─── Continued front page       (56) Reference JP-A-2-155418 (JP, A)                 JP-A-1-152926 (JP, A)                 JP-A-2-70223 (JP, A)                 JP-A-1-152976 (JP, A)                 62-185431 (JP, U)

Claims (5)

(57) [Claims] 1. A device main body that operates using electric power supplied from an external AC power supply via an AC power input means,
A device provided in the main body of the device and provided with a voltage varying means and a power supply means for an external device, which makes the electric power available from the outside, wherein the external device is operated from the voltage varying means.
Voltage detecting means for detecting the voltage at a predetermined location of the circuit to the power supply means, and the detected voltage from the voltage detecting means is compared with a predetermined reference voltage. An external device power supply means comprising: a control means for stopping the supply of power to the power supply means for power supply; and an abnormality display means for notifying that the detected voltage exceeds an allowable range. Equipment. 2. The apparatus according to claim 1, wherein the voltage varying unit further comprises a manual switching unit capable of changing the amount of power supplied to the external device power supply unit. 3. The apparatus according to claim 2, wherein the manual switching means is provided in the apparatus body and has a harness and a connector. 4. An apparatus main body which operates using electric power supplied from an external AC power source through an AC power input means,
A device provided in the main body of the device and provided with a voltage varying means and a power supply means for an external device, which makes the electric power available from the outside, wherein the external device is operated from the voltage varying means.
Voltage detection means for detecting a voltage at a predetermined position of the circuit up to the power supply means, and the detected voltage from the voltage detection means is compared with a predetermined reference voltage so that the voltage is outside the allowable range. An external device power supply means comprising: a control means for controlling power supply to the device power supply means; and an abnormality display means for notifying that the detected voltage exceeds an allowable range. Equipment equipped. 5. An apparatus main body that forms an image by using electric power supplied from an external AC power source through an AC electric power input means, and the apparatus main body, which is provided in the apparatus main body and makes the electric power available from the outside. in apparatus provided with a power supply unit for voltage varying means and the external device, the external from the voltage changing means
Voltage detection means for detecting the voltage at a predetermined location of the circuit to the device power supply means, and the detected voltage from the voltage detection means is compared with a predetermined reference voltage, so that it falls within an allowable range, The power supply to the external device power supply means is controlled, and if the power is not within the allowable range, the control means for stopping the power supply to the external device power supply means and the detected voltage are within the allowable range. An apparatus including power supply means for an external device, which is provided with an abnormality display means for notifying that the power has exceeded the limit.