JP4569792B2 - Power supply device and power supply system for electrophoresis apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power supply system in an electrophoresis apparatus.
[0002]
[Prior art]
When analyzing a biological sample by electrophoresis, high-voltage direct current is applied to the positive and negative electrodes (platinum electrodes) of the electrophoresis tank equipped with the electrophoresis gel, but it must be connected so as not to mistake the polarity. The high-voltage direct current is generated from a commercial alternating-current power supply. However, if the operation procedure of the power supply equipment for this purpose is mistaken, there is a risk of electric shock and electric leakage, and the work is complicated. Various measures have been taken, such as using several types of connector combinations as a means to solve this, color-coding the lead wires for device interconnection, reducing the exposed metal parts of the device and leads, but the complete ones are still Not developed.
[0003]
[Problems to be solved by the invention]
It is an object of the present invention to provide a power supply facility that can safely be equipped with a power supply without causing a mistake in polarity even when an operator performs random work.
[0004]
[Means for solving the problems]
In general, in a power supply device for obtaining a DC high voltage for electrophoresis of about 300 V from a commercial AC power supply of 100 V,
An AC adapter unit provided with a female output connector which is insulated from a commercial AC power source by an isolation transformer and first takes out approximately 36V DC low voltage;
A male connector that can be fitted to the female connector is provided at the tip, and a cable for receiving the DC low voltage is fixedly connected, and a DC-DC converter that generates a 300 V DC high voltage from the 36 V DC low voltage and an operator output. An electrophoretic tank power unit having a plug-in type female terminal fixed to the housing as an output terminal,
The plug-in type male terminal led to the positive and negative platinum electrodes of the electrophoresis tank is configured as a power supply device system including an electrophoresis tank in which the plug terminals are fixedly fitted in correspondence with the female terminals.
[0005]
A rectifier bridge circuit is inserted between the positive and negative electrodes of the electrophoresis tank and the male terminal, and the polarity of the platinum electrode is fixed regardless of the polarity of the female terminal of the electrophoresis tank power supply unit. You may be able to work randomly.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The accompanying drawings are schematic diagrams of the power supply equipment of the present invention. In a power supply apparatus for obtaining a DC high-voltage power supply for migration of generally 300 V from a commercial AC power supply 100 V,
An AC adapter section housing 4 provided with a female output connector 3 that is insulated from the commercial AC power supply 2 by the isolation transformer 1 and first takes out approximately 36V DC low voltage;
A cable 6 that receives the DC low voltage from the female connector 3 to the male connector 5 is fixedly connected, and a DC-DC converter 7 that generates a 300 V DC high voltage from the 36 V DC low voltage and an output control unit 8 for setting an output by the operator. As the positive and negative output terminals, plug-in type female terminals 9 and 9 are each independently attached to the casing, and the electrophoresis tank power source casing 10 is provided.
Plug-in male terminals 11, 11 that lead to the positive and negative platinum electrodes 14, 15 of the electrophoresis tank 13 are attached and fixed corresponding to the positions of the female terminals 9, 9. A power supply system comprising an electrophoresis tank 13 having a rectifier bridge circuit 12 inserted between the terminals 11 and 11 was constructed.
[0007]
According to this configuration, the AC adapter unit housing 4 and the electrophoresis tank power supply unit housing 10 are connected by the cable 6 and the positional relationship between the two is relatively free. The electrophoresis tank 13 is mechanically connected and the position between the two is fixed.
First, the cable adapter 6 keeps the AC adapter section housing 4 at a distance from the electrophoresis tank power supply section housing 10 and thus the electrophoresis tank 13 as a load. The AC adapter section housing 4 can be separated by a light and thin cable 6 that flows through. In this case, the terminal on the side of the electrophoresis tank power supply part of the cable 6 is pulled into the housing through an insulating bush or the like and directly soldered to an appropriate member so that the charging part is not exposed to the outside to prevent leakage and electric shock. Since the AC adapter unit side terminal 6 is a relatively dry region, the terminal treatment is performed with the male connector 5 so that the terminal can be inserted and connected to the female connector 3 for convenience of handling.
[0008]
This voltage of 36V as the voltage for routing on the table is not necessary to consider the trouble of electric shock, and the thinness and lightness of the electric wire are the most suitable from the standard and the actual, and the table is divided into a high voltage part and a low voltage part. It is a very convenient voltage to do.
[0009]
Next, for the electrical connection between the electrophoresis tank power supply housing 10 and the electrophoresis tank 13, a pluggable mechanically strong connector generally called a banana chip connector is used. This connector is fixed to each housing for both males and females, and when connected, the electrophoresis tank power source casing 10 and the electrophoresis tank 13 are firmly connected both electrically and mechanically.
[0010]
This aspect has the feature that both parts can be connected and separated with a safe part without touching the live part, and at the same time the high-voltage live part is not exposed to the outside at all when both are closely connected and in operation. It is safe. The rectifying bridge circuit 12 which is a nonpolarizing circuit is connected between the platinum electrode of the electrophoresis tank and an input terminal to the tank, that is, a fixed banana chip. By intervening this circuit, the polarity of the platinum electrode becomes constant regardless of the polarity of the input. In electrophoresis, there are many cases where the electrophoresis polarity is specified by the gel. Conventionally, the polarity of the lead wire is confirmed by color coding or the like every time the power supply is set, but this operation becomes unnecessary.
[0011]
In the operation of the electrophoresis tank, the most feared is that the electrophoresis tank is damaged and liquid leakage occurs. In the present invention, an electric shock accident can be prevented by the insulating transformer in the AC adapter section. In particular, the output control unit 8 that is most frequently touched by the operator is in the electrophoresis tank power source housing 10 that is easily wetted by the buffer solution, but is insulated from the ground by the insulating transformer 1, so that no electric shock occurs.
[0012]
As described above, in the present invention, the power source is roughly divided into two housings, and in the first housing, first, a low-voltage direct current insulated from the commercial power source is made so that it can be easily routed. Only high-voltage direct current handling was used, and the output end was made inaccessible to the charging part by mechanical direct connection, and the necessity of this access was eliminated by inserting a non-polarization circuit.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of the present invention.
[Explanation of symbols]
1 .. Insulation transformer 2 .. Commercial AC power supply 3 .. Female connector 4 .. AC adapter unit housing 5 .. Male connector 6 .. Cable 8. 11, 11 ·· Plug-in type male terminal 12 · · Rectification bridge circuit 13 · · Electrophoresis tanks 14 and 15 · · Platinum electrodes

Claims (1)

In a power supply device that obtains a DC high-voltage power supply for electrophoresis from a commercial AC power supply,
An AC adapter unit provided with a female output connector that is insulated from a commercial AC power source by an isolation transformer and extracts a DC low voltage;
A male connector corresponding to the female connector is provided at the tip, a cable for receiving the DC low voltage is fixedly connected, and a DC-DC converter that generates a DC high voltage from the DC low voltage and an output control unit for setting an output by the operator As an output terminal, an electrophoresis tank power supply unit in which a plug-in type female terminal is fixed to a housing,
An electrophoresis tank in which a plug-in type male terminal leading to the positive and negative electrodes of the electrophoresis tank is fixed corresponding to the female terminal and a rectifying bridge circuit is inserted between the positive and negative electrodes of the electrophoresis tank and the male terminal. A power supply device for an electrophoretic device.

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