JPH0666256U - Power supply - Google Patents

Abstract

(57) [Abstract] [Purpose] Regarding a power supply device for supplying power to electronic equipment such as a radio, a tape recorder, and a calculator, it is possible to supply power even when a commercial power supply fails, and The purpose is to save electricity. [Structure] Insert plug 1 for connecting to commercial power supply
1. An AC / DC converter 12 for converting AC power input via the insertion plug into DC power, and an output connector 13 for supplying DC power output from the AC / DC converter to the electronic device EE. The solar battery PV is attached to the housing 10 that houses the AC / DC converter 12, which is the power supply device 1 having the output of the solar battery PV connected to the electronic device EE via the output connector 13. Is configured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a power supply device for supplying power to electronic equipment or electric equipment such as radios, tape recorders, and calculators (these are referred to as “electronic equipment”).

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, a portable electric device that uses a battery as a power supply is usually provided with an input connector (external power supply terminal) for receiving a DC power supply from the outside. A so-called AC adapter is widely used as a power supply device for supplying electric power to an electric device via such an external power supply terminal.

A general AC adapter projects from an AC / DC converter (forward converter) including a power transformer and a rectifier circuit, and a synthetic resin housing accommodating the AC / DC converter, and is integrated with this. It is composed of a plug attached to the housing and an output connector (DC plug) connected to the tip of the wire pulled out from the housing.

[0004]

[Problems to be solved by the device]

 However, in the conventional AC adapter, since electric power is supplied only from the commercial power source, if the commercial power source fails during use, the operation of the electric device is naturally stopped.

Further, in recent years, energy saving of various electric devices has been demanded from the viewpoint of environmental protection. However, since individual electric devices that operate with an AC adapter generally consume relatively little power, there is a problem in that little energy saving or power saving effects can be expected due to user efforts such as frequent power-off. .

In view of the above problems, it is an object of the present invention to provide a power supply device that can supply power even when the commercial power supply fails and that can save the power of the commercial power supply. And

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, a power supply device according to the invention of claim 1 is a plug for connecting to a commercial power supply and converts AC power input via the plug to DC power. A power supply device having an AC / DC converter for converting, and an output connector for supplying DC power output from the AC / DC converter to an electronic device, wherein a housing containing the AC / DC converter has a solar cell. Is attached, and the output of the solar cell is connected to the electronic device via the output connector so that the output can be supplied.

A power supply device according to a second aspect of the present invention is provided with a solar cell input terminal for outputting DC power supplied from the solar cell from an output connector. A power supply device according to the invention of claim 3 is a solar cell, an output connector for supplying a DC power output from the solar cell to an electronic device, and a DC power supply from another power supply device for the output connector. And an input connector to which another output connector having the same shape as that of the output connector can be connected.

[0009]

[Action]

 The electric power generated by the solar cell is taken out from the output connector and supplied as a power source to the electronic device to which the output connector is connected. If the amount of power generated by the solar cell is not sufficient to operate the equipment, parallel operation with the commercial power source will be performed by connecting the plug to the commercial power source.

In the power supply device according to the second aspect of the present invention, when the solar cell is not connected to the solar cell input terminal, the power supply device is used as a normal power supply device with a commercial power source. In the power supply device according to the invention of claim 3, by connecting the output connector to the electronic device and connecting the output connector of another power supply device such as an AC adapter to the input connector, the parallel operation of the solar cell and the commercial power supply can be performed. Done. If the power supply is not used, the output connector of another power supply can be directly connected to the input connector of the equipment.

[0011]

【Example】

 FIG. 1 is a circuit diagram of an AC adapter 1 according to the present invention. The AC adapter 1 includes a plug 11 for connecting to a commercial power source, an AC / DC converter 12 for converting AC power input through the plug 11 into DC power, and an AC / DC converter 12. It is composed of an output connector 13 and the like for supplying the DC power output from the electronic device EE.

The AC / DC converter 12 includes a power supply transformer 21, a rectifying circuit 22, a smoothing capacitor 23, etc., which are housed in a housing 10 made of synthetic resin. The insertion plug 11 projects from the housing 10 and is provided integrally therewith, and the output connector 13 is connected to the tip of an electric wire 25 drawn from the housing 10. As the output connector 13, a so-called DC plug configured by arranging an outer cylinder and an inner core concentrically, and various other plugs are used.

A solar cell PV is attached to the outer surface of the housing 10 with an adhesive or the like. The output (generated power) of the solar cell PV is connected in parallel with the output of the AC / DC converter 12 via the diode 26 for backflow prevention, and is supplied to the electronic device EE via the output connector 13. It is possible. That is, the AC adapter 1 can operate in parallel with the commercial power source and the solar cell PV. In addition, as the solar cell PV 1, one whose output voltage (operating voltage) at a practical operating point is slightly higher than the rated voltage of the electronic device EE is selected. For example, when the rated voltage of the electronic device EE is 6 V and the forward voltage of the backflow preventing diode 26 is 0.7 V, the solar cell PV having an operating voltage of about 7 V is selected.

Therefore, by connecting the insertion plug 11 to the commercial power source and connecting the output connector 13 to the input connector CIN of the electronic device EE, the DC power from the commercial power source or the solar battery PV is transferred to the electronic device EE. Is supplied to. The power consumption of the commercial power source is reduced according to the power generation amount of the solar cell PV, and power can be saved accordingly. Even if the commercial power supply fails, the solar battery PV supplies power, so that the electronic device EE can operate even if the power generation amount of the solar battery PV is commensurate. Further, when the electronic device EE has a built-in storage battery, the storage battery can be charged by electric power from the commercial power source and the solar battery PV, and even when the commercial power source fails, the solar battery PV can be charged. The storage battery can be charged only by itself. Furthermore, it is also possible to use the AC adapter 1 for carrying and to operate the electronic device EE or charge the storage battery only by the solar battery PV without connecting to the commercial power supply.

FIG. 2 is a circuit diagram of an AC adapter 1a according to another embodiment of the present invention. In the AC adapter 1a shown in FIG. 2, elements having the same functions as those of the AC adapter 1 shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted or simplified (the same applies below).

In FIG. 2, the housing 10 is provided with an input connector 14 having the same shape as the input connector CIN provided in the electronic device EE. The input connector 14 is connected in parallel with the output of the AC / DC converter 12 via the diode 26 so that the DC power supplied from the external solar cell PV is output from the output connector 13. The output connector 13 is usually a male connector and the input connector 14 is a female connector.

Therefore, in the AC adapter 1a, when the solar battery PV is not connected to the input connector 14, DC power can be supplied to the electronic device E E from the commercial power source only by the conventional usage method, and When the solar cell PV is connected to the input connector 14, the connected solar cell PV and the commercial power source can be operated in parallel.

FIG. 3 is a circuit diagram of an AC adapter 1b according to another embodiment of the present invention. In FIG. 3, the housing 10 includes a DC-DC converter (DC-DC converter) for converting the output voltage (for example, 12V) of the solar cell PV into a voltage (for example, 7V) near the rated voltage (for example, 6V) of the electronic device EE. ) 15 is built in.

The DC / DC converter 15 can control the operating point of the solar cell PV by changing the on / off duty ratio of the switch element Q1 and the switch element Q1 which are turned on / off at a predetermined cycle. It includes a PWM controller 31, a transformer 32 for boosting, a rectifying diode 33, a smoothing capacitor 34, and a voltage detection circuit 35 for detecting an output voltage and inputting it to the PWM controller 31. The PWM controller 31 controls the solar cell PV in accordance with the power generation amount of the solar cell PV and the state of the load (electronic device EE) in order to operate the solar cell PV at the optimum operating point (maximum output point). As a result, the electric power generated by the solar cell PV is efficiently supplied to the electronic device EE.

Therefore, in the AC adapter 1b, when the solar cell PV is connected to the input connector 14, the connected solar cell PV and the commercial power source can be operated in parallel, and the solar cell PV can generate electric power. Electric power can be efficiently supplied to the electronic device EE.

FIG. 4 is a circuit diagram of the photovoltaic power generation device 2 according to the present invention. The photovoltaic power supply device 2 receives DC power from other power supply devices such as the solar battery PV, the output connector 41 for supplying the DC power output from the solar battery PV to the electronic device EE, and the AC adapter 5. The input connector 42, the backflow prevention diode 51, and the like.

The input connector 42 can be connected to another output connector having the same shape as the output connector 41. The DC power input from the input connector 42 is supplied to the electronic device EE via the output connector 41.

Therefore, it is possible to supply electric power to the electronic device EE by the photovoltaic power supply device 2 to operate the electronic device EE, and when the amount of power generation is small, the output connector COUT of the AC adapter 5 is connected. By connecting to the input connector 42, parallel operation with a commercial power source can be performed.

By using the photovoltaic power generation device 2, it is possible to operate the electronic device EE or charge the storage battery built in the electronic device EE without using a commercial power supply. When the amount of power generated by the solar cell PV is small, the electronic device EE can be operated by parallel operation with the commercial power supply. In either case, it is possible to save power by reducing the power consumption of the commercial power supply. Moreover, since the output connector 41 has the same shape as the output connector COUT of the AC adapter 5, when the solar power generation device 2 is not used, the output connector COUT is directly connected to the input connector CIN of the electronic device EE. It is possible to use.

FIG. 5 is a circuit diagram of another embodiment of a photovoltaic power supply system 2a according to the present invention. The photovoltaic power supply device 2a is provided with a DC / DC converter 15a similar to the DC / DC converter 15 shown in FIG. The DC / DC converter 15a is controlled so as to operate the solar cell PV at an optimum operating point, whereby the electric power generated by the solar cell PV is efficiently supplied to the electronic device EE.

FIG. 6 is a perspective view showing an example of the external appearance of the photovoltaic power supply device 2a. In FIG. 6, the DC / DC converter 15a is housed in the control box 40, and the solar cell PV, the output connector 41, and the input connector 42 are connected to each other by electric wires 43 and 44.

According to the above-described embodiment, the generated electric power of the solar cell PV is supplied through the input connector CIN provided in the electronic device EE without performing any processing on the conventionally used electronic device EE. In addition, it can be operated in parallel with a commercial power source. Therefore, it is possible to supply power even when the commercial power supply fails, and it is possible to save energy in the commercial power supply by using energy of sunlight or illumination light to save energy. By setting the output voltage of the solar cell PV to less than 30 V, the system linkage protection device linked with the commercial power supply is not needed.

In the above-described embodiment, the circuits and methods of the AC / DC converter 12 and the DC / DC converter 15 can be modified in various ways other than those described above. In each of the AC adapters 1, 1a, 1b or the photovoltaic power supply devices 2, 2a, a plurality of output connectors 13, 41 are connected in advance to supply power to a plurality of electronic devices EE. It is also possible to configure. In addition, the structures, shapes, arrangements of respective parts, circuits, etc. of the AC adapters 1, 1a, 1b and the photovoltaic power supply units 2, 2a can be variously changed in accordance with the gist of the present invention.

[0029]

[Effect of device]

 According to the present invention, it is possible to supply power even when the commercial power supply fails, and it is possible to save the power of the commercial power supply.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an AC adapter according to the present invention.

FIG. 2 is a circuit diagram of an AC adapter of another embodiment according to the present invention.

FIG. 3 is a circuit diagram of an AC adapter of another embodiment according to the present invention.

FIG. 4 is a circuit diagram of a photovoltaic power supply device according to the present invention.

FIG. 5 is a circuit diagram of another embodiment of a photovoltaic power supply device according to the present invention.

FIG. 6 is a perspective view showing an example of the external appearance of a photovoltaic power generation device.

[Explanation of symbols]

 1,1a, 1b AC adapter (power supply device) 2,2a Photovoltaic power supply device (power supply device) 5 AC adapter (other power supply device) 11 Insert plug 12 AC / DC converter 13 Output connector 14 Input connector (solar) Input terminal for battery) 41 Output connector 42 Input connector PV Solar cell EE Electronic device

Claims (3)

[Scope of utility model registration request] 1. A plug for connecting to a commercial power source, an AC / DC converter for converting AC power input through the plug to DC power, and an output from the AC / DC converter. A power supply device having an output connector for supplying direct-current power to an electronic device, wherein a solar cell is attached to a housing accommodating the AC / DC converter, and the output of the solar cell is the output connector. A power supply device characterized in that the power supply device is connected to the electronic equipment via a power supply. 2. A plug for connecting to a commercial power source, an AC / DC converter for converting AC power input via the plug to DC power, and output from the AC / DC converter. A power supply device having an output connector for supplying direct-current power to an electronic device, comprising a solar cell input terminal for outputting direct-current power supplied from the solar cell from the output connector. Power supply device characterized by. 3. A solar cell, an output connector for supplying a DC power output from the solar cell to an electronic device, and a DC power output from another power supply device for outputting from the output connector. A power supply device, comprising: an input connector to which another output connector having the same shape as the output connector can be connected.