JPH0348207Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a connection terminal used for electrical connection between a power source, an electric appliance, and between electric appliances.

<Prior art> As shown in Fig. 7, the conventional connection terminal connects the power supply 5.
Connect the connection terminal 52 to the positive side of the power supply 5
Connecting terminal 53 is connected to the negative side of 1,
If the connection terminals 52 and 53 are wet with water droplets, etc.
Ions 54 (positive ions), 55 in the water droplets
The positive ions 54 (negative ions) are attracted to the connection terminal 53 and become negative floating ions 56 of the connection terminal 53, and the negative ions 55 are attracted to the connection terminal 52 and become positive floating ions 57 of the connection terminal 52. Each is neutralized and new compounds are generated, and some of these compounds adhere to the connection terminals 52 and 53, resulting in poor conductivity, and if they cover the entire connection terminals 52 and 53, problems may occur. There is a possibility that this compound may become a conductor, and if it comes into contact with the air while it is attached to the connection terminals 52 and 53, it will combine with oxygen in the air to produce oxides and cause rust, so do not use it in the bathroom. If the above connection terminal is exposed in a humid place such as a place with high humidity or where water droplets are generated, electrolytic corrosion as mentioned above will occur even if a small amount of current flows. In this case, it is necessary to apply gold plating etc. to the connection terminals and be very careful about the shape of the vicinity of the connection terminals.
The drawback was that it was expensive.

<Objective> The object of the present invention is to provide a connecting terminal that eliminates the above-mentioned drawbacks.

<Embodiment> An embodiment of the connection terminal of the present invention will be described below with reference to the drawings.

In FIG. 1 showing the principle of the connection terminal of the present invention, the changeover switch 1 has the a-side terminals 2-1, 2-2,
Switch terminals 3-1, 3-2, b side terminal 4-1,
The switch terminal 3-1 is connected to the positive side of the power supply 5, and the a-side terminal 2-1 is connected to the positive side of the power supply 5.
is connected to the connection terminal 6, the a side terminal 2-1 is connected to the b terminal 4-2, and the switch terminal 3-
2 is connected to the negative side of the power source 5, the a side terminal 2-2 is connected to the connection terminal 7, the a side terminal 2-2 is connected to the above 4-1, and the switch terminal 3-1, 3-2 has the a side (the above a side terminal 2-1,
2-2 side), b side (above b side terminals 4-1, 4-2
When the switch piece 8 is set to the a side, the potential of the connecting terminal 6 becomes positive.
The potential of the connecting terminal 7 becomes negative, and when the switch piece 8 is set to the b side, the potential of the connecting terminal 6 becomes negative, and the potential of the connecting terminal 7 becomes positive.

Immerse the connection terminals 6 and 7 of the above configuration in an aqueous solution,
When a current is applied from the power supply 5 and the switch piece 8 is set to the a side, the potential of the connection terminal 6 becomes positive, so the negative ions 9 in the aqueous solution are attracted to the connection terminal 6, but the switch piece 8 When set to the b side, the potential of the connecting terminal 6 becomes negative, so the attracted negative ions 9 repel the connecting terminal 6 and separate, so that the floating ions (not shown) of the connecting terminal 6 and the negative ions 9 does not neutralize and no longer produces compounds.

Also, when the switch piece 8 is set to the a side, the potential of the connection terminal 7 becomes negative, so the positive ions 10 in the aqueous solution are attracted to the connection terminal 7, but when the switch piece 8 is set to the b side, Since the potential of the connection terminal 7 becomes positive, the attracted positive ions 10 repel the connection terminal 7 and separate, so the floating ions (not shown) of the connection terminal 7 and the positive ions 9 are not neutralized. No longer produces compounds.

Therefore, as mentioned above, switch piece 8 is placed on side a,
By alternately and continuously switching between the b side, a side, and b side, ions are not neutralized and compounds can be prevented from being generated.

In FIG. 2 showing an embodiment of the connection terminal of the present invention, the collector terminal of a transistor 22 is connected to the positive side of a power supply 21, and the output terminal of a NOT circuit 24 is connected to the base of the transistor 22 via a resistor 23. (pulse b output terminal), connect the connection terminal 25 to the emitter of the transistor 22, connect the collector of the transistor 26, and connect the input terminal of the NOT circuit 24 to the base of the transistor 26 via the resistor 27. Along with connecting
Output terminal of NOT circuit 28 (pulse a output terminal)
and the emitter of the transistor 29 is connected to the positive side of the power supply 21.
The above NOT circuit 29 is connected through the resistor 30 to the base of
connect the output terminal of the transistor 29, connect the connecting terminal 31 to the emitter of the transistor 29 and connect the collector of the transistor 32, connect the output terminal of the NOT circuit 24 to the base of the transistor 32 via the resistor 33, A connection terminal 35 provided on the load section 34 is removably connected to the connection terminal 25, a connection terminal 36 provided on the load section 34 is removably connected to the connection terminal 31, and the negative On the other hand, the emitter of the transistor 26 and the emitter of the transistor 32 are each grounded, a resistor 37 is connected to the input terminal of the NOT circuit 28, and the output terminal of the NOT circuit 38 is connected to the output terminal of the NOT circuit 28. A capacitor 39 is connected between the resistor 37 and the resistor 37, and a resistor 40 is connected between the resistor 37 and the input terminal of the NOT circuit 38.
8, resistors 37 and 40, and capacitor 39 constitute an oscillation circuit A, and the output level of the oscillation circuit A alternates between high level (ON) and low level (OFF) as shown in Figure 3. NOT above the pulse
It is output from the output terminal of the circuit 28.

Further, the output terminal of the NOT circuit 28 outputs a pulse a as shown in FIG.
The output terminal of the circuit 24 outputs a pulse b as shown in FIG. 3 (which becomes a pulse opposite to the pulse a by the NOT circuit 24). The load section 34 includes the connection terminal 25 and the connection terminal 35,
The load section 34 can be separated by disconnecting the connection terminals 31 and 36, and the load section 34 has a connection between the connection terminals 35, 36 and the load. A rectifier circuit as shown in FIG. 4 (the cathode of a diode 41 is connected to the connection terminal 34 and the anode of a diode 42 is connected, the anode of the diode 41 is grounded and connected to the anode of a diode 43, The connection terminal 36 is connected to the cathode of 43, and the diode 4
4, connect the cathode of the diode 42 to the cathode of the diode 44, connect the capacitor 45, ground the capacitor 45, connect the load to the cathode of the diode 42, and connect the diode 41, 42,4
3, 44, and a bridge rectifier circuit consisting of a capacitor 45).

The operation of the connection terminal configured as described above will be explained below.

First, a high level pulse a is generated from the oscillation circuit A.
(output pulse of the above NOT circuit 28) is output, pulse b (output pulse of the above NOT circuit 24)
is at a low level, so the transistors 26, 2
9 becomes conductive (ON), and the transistors 22 and 32 become non-conductive (OFF), so the current applied from the power supply 21 flows through the transistor 29, the load section 34, and the transistor 26 as shown by the solid arrow. Although the current is applied, the above oscillation circuit A
Since the pulse a outputted from changes from a high level to a low level, the pulse b changes from a low level to a high level, so the transistors 22 and 32 are turned on, and the transistors 26 and 29 are turned off, so the power supply 21 The current applied from the transistor 22 to the load section 3 as shown by the broken arrow
4. Transistor 32 and current are applied.

Further, the current applied through the connection terminals 35, 36 is applied to the connection terminals 35, 36 as described above.
Since the current is applied alternately from each of the above, the current is applied to the load section 34 as alternating current, but it is rectified by the rectifier circuit and applied to the load.

In the above embodiment, a transistor and an oscillation circuit are used to apply alternating current to the connection terminals, but a changeover switch or the like may also be used as shown in the principle diagram of FIG. 1 above.

Fig. 5 shows an example of an electric appliance incorporating the connection terminal of the present invention, which is a radio/cassette player that can be used in the bathroom, and has a main body 4 equipped with a radio, speaker, power source, etc.
A unit part 47 with a cassette and a bath water level/temperature sensor 48 are removably provided at 6, and the connection terminal of the present invention connects the main body part 46 and the unit part 47, and the main body part 46 and the bath water level/temperature sensor. 4
FIG. 6 is an enlarged view showing the connecting portion between the main body portion 46 and the unit portion 47, and the unit portion 47 corresponds to the load portion 34.

<Effects> The connection terminal of the present invention has the above structure,
It can prevent galvanic corrosion of the connection terminal, there is no need to apply gold plating etc. to the connection terminal, the shape of the vicinity of the connection terminal etc. can be formed relatively easily, and the cost is relatively low. There is an effect.

[Brief explanation of drawings]

FIG. 1 is a schematic circuit diagram showing the principle of the connecting terminal of the present invention, FIG. 2 is a schematic circuit diagram showing an embodiment of the connecting terminal of the present invention, FIG. 3 is an output waveform diagram of each part of FIG. 2, FIG. 4 is a schematic circuit diagram of an example of a rectifier circuit provided in the load section of FIG. 2, FIG.
The figure is an enlarged view of the connection portion shown in FIG. 5, and FIG. 7 is a schematic circuit diagram of a conventional connection terminal. In the figure, 21: power supply, 22, 26, 29, 32:
Transistor, 25, 31, 34, 36: connection terminal, A: oscillation circuit.

Claims (1)

[Scope of utility model registration request] A connecting terminal used for electrical connection between a power source and an electric appliance, or between electric appliances, etc. is equipped with an electrolytic corrosion prevention device that prevents electrolytic corrosion by applying alternating current to the connecting terminal. connection terminal.