JP2813169B2 - Power supply for electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for electric equipment which can prevent an accident such as an electric shock.

[0002]

2. Description of the Related Art A power supply device for an electric device is a device for supplying driving power to an electric device included in the electric device such as a power supply circuit. Such a structure is adopted that the electric device and the power supply are directly connected by a power cord or the like.

[0003] By the way, electric devices included in electric equipment are used to prevent them from moisture and dust, or
In order to prevent electric shock due to the applied high voltage, it is usually covered with a cabinet or the like. Therefore, when maintaining or repairing an electric device having such a structure, it is necessary to expose an internal electric device or the like, and the cabinet is removed from the device body. At this time, the power cord is unplugged from the outlet and the supply of electric power to the electric device is cut off so that an accident such as an electric shock does not occur.

[0004]

As described above, the power cord is disconnected from the outlet before the maintenance or repair of the electric equipment, and the power supply is shut off. However, there are cases where the cabinet is removed without disconnecting the power cord due to carelessness of the operator. In this case, an electric device to which a high voltage is applied, such as a power supply circuit, is exposed, which may cause an accident such as an electric shock.

An object of the present invention is to solve the above-mentioned drawbacks and to provide a power supply device for electric equipment in which an accident such as an electric shock does not occur.

[0006]

According to the present invention, there is provided a power supply apparatus for an electric device, comprising: a device main body having an electric device; a cabinet which covers the electric device and is attached to the device main body; And a second connection terminal connected to the power supply through the first connection terminal and electrically connected to the first connection terminal.

Further, the first connection terminal is fixed inside the cabinet where the electric device is located.

Further, the second connection terminal is structured to be fixed to the device main body.

Further, the first connection terminal is constituted by an outlet having no conductive portion exposed, and the second connection terminal is constituted by a plug having an exposed conductive portion which can be inserted into and removed from the first connection terminal.

[0010] Further, the first connection terminal and the second connection terminal are arranged so that the cabinet is attached to the main body of the apparatus so as to be electrically connected.

In addition, the electric connection between the first connection terminal and the second connection terminal is disconnected when the cabinet is detached from the device body.

The electric device is a power supply circuit for supplying power to the magnetron for a microwave oven.

According to the above-described configuration, the first cabinet for supplying power to the device main body is provided to the cabinet detachable from the device main body.
Connection terminals are fixed. Therefore, when the cabinet is removed from the device main body, the supply of power to the device main body is cut off, and an accident such as electric shock can be prevented.

Further, an outlet whose conductive part is not exposed is used as a first connection terminal whose one end is connected to a power supply through a power cord. In this case, even if one end is kept connected to the power supply, an electric shock or the like can be prevented because the conductive portion is not exposed.

The arrangement of the first connection terminal and the second connection terminal may be electrically connected with the cabinet attached to the main body of the device, and connected to the first connection terminal with the cabinet removed from the main body of the device. The electrical connection of the second connection terminal is broken. In this case, the connection state and the non-connection state of the first connection terminal and the second connection terminal can be set by attaching the cabinet to the device body or removing the cabinet from the device body, thereby supplying power to the electric device and Power can be reliably cut off.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described by taking a microwave oven as an example. FIG. 1 is a cross-sectional view showing a structure of a microwave oven. Reference numeral 11 denotes a microwave oven, and the periphery of a device main body constituting the microwave oven 11 is covered by a cabinet 12. Inside the cabinet 12, electric devices and mechanical devices such as a power supply device 13 and a magnetron 14, and an apparatus main body such as a cooking room 15 are arranged. The main body of equipment such as electric devices and mechanical devices is a cabinet 1
2, the cabinet 12 is removed from the main body of the apparatus when performing maintenance or repair of the internal device.

The power supply unit 13 is mounted on a chassis 16 constituting the main body of the apparatus, and an electrical connection 17 is provided between the chassis 16 and the cabinet 12. In this case, the power supply device 13 is connected to the connection unit 17.
The connecting portion 17 is connected to a household outlet (not shown) through which, for example, 100 V AC flows through a plug 19 connected to the end through a power cord 18.

The power supply device 13 is a device having a transformer or the like for generating a high voltage.
4 is supplied as driving power. The microwave generated by the magnetron 14 is sent from the waveguide 20 to the cooking chamber 15 as shown by the arrow Y, and is used for cooking and thawing the food 21. Reference numeral 22 denotes a door of the microwave oven 11, and reference numeral 23 denotes a window that looks into the inside of the cooking chamber.

Here, the power supply 1 constituting the microwave oven
An example of the circuit configuration of No. 3 will be described with reference to FIG.
A transformer T has a primary side T1 connected to a 100 V AC power supply at home through a connection portion (a reference numeral 17 in FIG. 1). Two output terminals t are connected to the secondary side T2 of the transformer.
1, t2 are provided. The output of the output terminal t1 is supplied to the cathode K of the magnetron M. Also, the output terminal t2
Is connected to a capacitor C and a rectifier diode D.
A high voltage of about kV is applied to the anode A and the cathode K of the magnetron M.
It can be applied in between.

Next, the structure of the connecting portion 17 formed between the cabinet 12 and the chassis 16 in FIG. 1 will be described with reference to FIG. FIG. 3A is a diagram showing the inside of the cabinet. Reference numeral 31 denotes a part of the cabinet. Inside the cabinet 31, an outlet 32 that does not expose a conductive portion constituting one of the connection terminals is fixed. The outlet 32 is connected to a power cord 33, for example, by plugging a plug 34 at the end of the power cord 33 into a household outlet to connect to a 100V AC power supply.

FIG. 3B is a view showing a chassis portion.
Reference numeral 35 denotes a chassis, and a power supply 36
Is installed. Then, a plug 37 having a conductive portion that constitutes the other of the connection terminals is exposed is fixed to the chassis 35. The position of the plug 37 corresponds to the connector 32 provided on the cabinet 31. When the cabinet 31 is set at a proper position of the device main body, the plug 37 of the chassis 35 and the outlet 32 of the cabinet 31 are connected. Has become. Further, when the cabinet 31 is detached from the device main body, the plug 37 and the connector 3 are removed by separating the cabinet 31 from the device main body.
Connection 2 is automatically disconnected.

According to the above structure, maintenance of electric equipment,
When the cabinet is removed for correction, the outlet fixed to the cabinet is removed from the plug on the device body side.
Therefore, even when the power cord is connected to the power supply, the power supply to the device main body is cut off when the cabinet is removed, and electric shock and the like can be prevented.

In the above-described embodiment, the plug is provided on the device body side, and the outlet is provided on the cabinet side. However, the combination may be reversed. However, when the cabinet is used as an outlet, even if the user forgets to unplug the power cord, the outlet has a structure in which the conductive portion is not exposed, so that accidents such as electric shock can be prevented, and there is little danger.

In the above embodiment, the connection terminal is provided on the chassis on which the power supply device is mounted. However, the connection terminal can be provided at an arbitrary position on the device body close to the cabinet, such as by directly fixing the connection terminal to the power supply device. In the above embodiment, the case of a microwave oven has been described as an example.
The present invention can be applied to other electric devices such as a V receiver. Also, connection terminals having various structures can be used.

[0025]

According to the present invention, it is possible to realize a safe power supply device for electric equipment which can prevent an accident such as an electric shock.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating an embodiment of the present invention.

FIG. 3 is a perspective view showing a connection device used in the embodiment of the present invention.

FIG. 4 is a perspective view showing a connection device used in the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Microwave oven 12, 31 ... Cabinet 13, 36 ... Power supply device 14 ... Magnetron 15 ... Cooking room 16, 35 ... Chassis 17 ... Connection part 18, 33 ... Power cord 19, 34 ... Plug 20 ... Waveguide 21 ... Food 22 ... door 23 ... door

Claims (7)

(57) [Claims] 1. A device body having an electric device, a cabinet that covers the electric device and is attached to the device body, a first connection terminal fixed to the cabinet and connected to a power source through a power cord, and the electric device. And a second connection terminal electrically connected to the first connection terminal. 2. The power supply device for electric equipment according to claim 1, wherein the first connection terminal is fixed inside a cabinet in which the electric device is located. 3. The power supply device for an electric device according to claim 1, wherein the second connection terminal is fixed to the device main body. 4. The electric device according to claim 1, wherein the first connection terminal is an outlet with no conductive portion exposed, and the second connection terminal is a plug with an exposed conductive portion that can be inserted into and removed from the first connection terminal. Equipment power supply. 5. The arrangement of a first connection terminal and a second connection terminal,
2. The power supply device for an electric device according to claim 1, wherein the electric power supply device has a structure in which the cabinet is electrically connected to the main body while the cabinet is attached to the main body. 6. The power supply for an electric device according to claim 1, wherein the electric connection between the first connection terminal and the second connection terminal is disconnected when the cabinet is detached from the device main body. Feeding device. 7. The power supply device for an electric device according to claim 1, wherein the electric device is a power supply circuit that supplies power to a magnetron for a microwave oven.