KR920006943B1 - Apparatus for 110/220 voltage converter - Google Patents

Abstract

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Description

110 / 220V AC Power Automatic Switching Device

1 and 2 are principle diagrams of a switching circuit.

3, 4 and 5 are conventional automatic switching circuits.

6 is a block diagram for showing the principle of the conventional automatic switching circuit.

7 is a perspective view of the plug of the present invention.

8 and 9 are schematic diagrams for explaining the operation of the plug of the present invention.

10 is a circuit connection diagram of the present invention.

11 is a perspective view of the plug removed.

The present invention is a circuit and apparatus for automatic switching of power supply voltage to output at a constant voltage irrespective of AC power supply of 110V and 220V.

As a theory of the input power selection method of 110V and 220V, the same principle as that of FIG. 1 and FIG. 1 shows an intermediate tap provided on the winding of a transformer so that c and b of switch terminals a, b, and c are shorted at 110V input, and a and c terminals are shorted at 220V input. 2, 2 ') to always apply the same voltage. 2 is a back voltage circuit. When 110V, the voltage is doubled by short-circuiting the switch, and when the voltage is 220V, the voltage is doubled by opening the switch and the same is applied to the output terminals (out 2, 2 '). To get the voltage.

However, such a circuit includes an operation of a switch, that is, a, b, and c contacts in FIG. 1, and SW 1 in FIG. 2 on and off. It even has the risk of causing litigation and disasters. Therefore, in order to solve this problem, it is conventionally disclosed in FIGS. Likewise, many researches and developments have been made on the prevolt automatic switching circuit in which the output voltage is constant regardless of the input power of 110V and 220V. In principle, such a series of developments can be seen in FIG. A sensing unit for recognizing whether the input voltage of the input unit is 110V or 22V, a switching driver for amplifying the sensed signal, and a switching unit including the amplified signal includes switching elements (relays and thyristors, etc.).

In such a conventional automatic switching circuit, a fairly complicated electrical configuration is provided, and there is a significant risk inherent due to the defect of the device because there is no preventive device except a fuse when malfunctioning. The present invention has been developed with this problem in mind.

The present invention prevents any malfunction by replacing the battery sensing unit with the plug itself, and using the plug terminal instead of the switch, and mechanically solves the problem by relying on the electrical sensing signal alone, thereby significantly reducing the number of parts. It is to improve the savings and reliability. The input section of the present application consists of the plug illustrated in FIG. The plug of FIG. 7 operates as shown in FIG. 8 and FIG. The plug is provided with two 110V terminals 1-1 'and a 220V terminal 2-2' at the bottom of the plug.

One 110V terminal of this plug terminal is connected to one 220V terminal and U-shaped through groove 4 inside the plug, and is filled with a bearing 9 of insulating material between the terminal and the terminal. When explaining the operation of this plug, if you want to insert the plug into the 220V outlet terminal, if the 110V plug terminals of 1 and 1 'are applied by the a direction while being blocked by the outlet outer membrane 10, the 220V plug terminal is inserted. To be. The opposite happens when using 110V. When plugged in like this, it is already distinguished between 110V and 220V.

In FIG. 8, when the 110V plug is pushed by the outer membrane 10 of the outlet, this force is transmitted to the bearing 9 as it is, and the bearing pushes the plug terminal 2 for the 220V, thereby inserting it into the fixed terminal 11 of the outlet. Hanging jaw 16 is installed at the end of through hole to prevent the plug from coming off. The metal terminal 5 'of the conductor is seated on the latching jaw 16 to conduct current flowing through the plug through the terminal line 6 of the transformer supported by the conductive means 5 and the screw or other fixing means.

In this way, the voltage input from the plug is supplied to the load through an electrical circuit as shown in FIG.

A set of 110V terminal 1 'and 220V terminal 2' are short-circuited, the other 220V terminal 2 is separated from the contact at the beginning of the transformer primary side, and the other 110V terminal 1 is contacted at the middle of the transformer primary winding. It can be separated from. The operation of this circuit is explained as follows.

When using 220V, when the plug terminals 2 and 2 'are connected to the outlet terminal 11, the plug terminals 1 and 1' of the 110V are separated from the outlet terminal. In this state, the plug terminals 2 and 2 'are short-circuited with the metal terminals 5' seated on the locking step 16, and this supply current is supplied through the a and d terminals of FIG.

On the contrary, when 110V is used, when the 110V plug terminal is connected to the outlet, the 220V plug is disconnected from the outlet. At this time, since the metal terminal 5 'is short-circuited with the 110 plug, the power supply is connected to the terminals b and d in FIG. It is supplied through. The plug is separated into an upper end 3 'and a lower end 3, and can be screwed together or separated by a screw groove 3 ". The upper side of the lower end 3 fixes and connects the line 6 drawn from the transformer. Fixing means 7 (12, 13, 14, and 15 in Fig. 11) are provided, one of the 110V and 220V terminals shorted as shown in Fig. 8 in Fig. 11, and the other terminals are drawn out to the respective wires to the transformer. Connected.

As such, the present invention does not require a special electrical sensing unit and switching unit, so that the structure is robust, trouble-free, and can be manufactured at low cost. The present invention is not limited to this embodiment. The adapter structure in which the transformer and the plug are integrated, and the charger using the adapter can be used in various applications.

Claims (5)

In the through-groove of the plug body, two 110V and 220V plugs, one pair of 110V terminals and one pair of 220V terminals, and an insulator transfer means for transmitting the movement of each terminal to other terminals facing each other; When supplying the power transmitted from one plug to the transformer from the outlet, the opposite plug terminal is connected to the plug terminal and the transformer terminal electrically separated from the transformer outgoing terminal, and the power supplied from the connecting means has a constant voltage at the output side. A 100V / 220V AC power automatic switching device comprising a transformer having an intermediate tap on a primary winding or a secondary winding for supply. The 110 / 220V AC power supply automatic switching device according to claim 1, wherein the through groove has a U shape. 4. The automatic switching device of 110 / 220V AC power supply according to claim 3, wherein there is a locking step at the end of the through groove to prevent the plug from being detached. 4. The 110 / 220V AC power automatic switching device according to claim 3, wherein the fixing device is connected to the lead wire of the seating terminal, the seating terminal, and the transformer lead wire of the seating top layer. 5. The automatic switching device for 110 / 220V according to claim 4, wherein one plug for 110V and one plug for 220V are electrically shorted.

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