JPH07130430A - Power supply plug having check function - Google Patents

Abstract

PURPOSE:To determine polarity at the timing when a power supply plug is inserted by forming a polarity determining means integrally with the plug provided with at least one pair of terminals. CONSTITUTION:For a plug 1, as one power supply terminal 4 connected to a neon lamp 10 is connected to the plus side of a single phase commercial power supply, when a check button 6 is pushed manually, it becomes continuous with earth through a finger which is pushing, for example, a metal rod 7, and a contact plate 9 to light the lamp 10. When the condition where the terminal 4 is set on the AC voltage side, with a terminal 5 connected to the earth side, is set as a correct plug insertion direction, the plug insertion direction can be determined to be correct when the lamp 10 is lighted by pushing the button 6. This determination means provides simplified structure because of manual display, its power consumption is restricted, and high precision detection can be achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The plug for a power source with a function according to the present invention is one in which the positive direction is eliminated by specifying the inserting direction of the power plug in advance so that the potential becomes negative with respect to the ground. The present invention relates to a power supply plug used in a therapeutic device, an ion generator, a cold therapeutic device, a computer, an electronic device having a microcomputer built therein, a game device, and the like.

[0002]

2. Description of the Related Art Potential treatment devices and the like in the prior art have a power plug inserted to obtain a single-phase commercial AC power source, and have no relation to the direction in which the power plug is inserted in order to have a negative potential with respect to ground. Instead, a circuit for detecting the ground side flowing into each of the pair of terminals is provided and switched by a relay or the like to prevent generation of a positive potential with respect to the ground and obtain a negative potential.

[0003]

However, in the above-mentioned prior art, while it is not necessary to consider the inserting direction of the power plug, a separate circuit and a switching relay or the like are required to detect the ground side, and the circuit There was a problem that the configuration was complicated.

Therefore, there is a problem to be solved in detecting the earth side or the AC side (DC side) of the power source with a simple circuit as to the direction of inserting the power source plug.

[0005]

In order to solve the above problems, a power plug with a check function according to the present invention is a power plug having at least a pair of terminals, and the plug has a polarity for determining the polarity. That is, the means is integrally formed. Further, the discriminating means is adapted to be manually displayed; the power source is an AC alternating current power plug.

[0006]

By integrally forming the determining means for determining the polarity in the power plug having at least a pair of terminals, the polarity can be determined when the plug is inserted.

Further, since the discriminating means is manually displayed, the polarity can be discriminated arbitrarily only when necessary, there is no need to consider the power consumption, and the circuit structure is simplified. be able to.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The power plug with check function according to the present invention will be described in detail below with reference to FIGS.

The power plug 1 with a check function is shown in FIG.
As shown in FIG. 4, it is composed of an upper case 2 and a lower case 3 which are made of an insulating material and have a substantially rounded rectangular shape.
5, the upper case 2 is provided with a neon lamp 10 which is a structure of a determination means facing the outside at the tip of the upper case 2, and the right side surface of the lower case 3 is a structure of the determination means. The structure is such that the check button 6 is arranged with its head protruding.

The lower case 3 is provided with a support member 3a for supporting the pair of power supply terminals 4 and 5, and is provided with a locking portion 3b for locking the check button 6 at one end of the support member 3a. There is. The pair of power supply terminals 4 and 5 supported by the support member 3a are electrically connected to the AC power supply cable 4a and the grounding cable 4b by caulking or soldering. In addition, a pair of power supply terminals 4 and 5 are provided in the upper case 2.
And the check button 6 etc. are installed, and finally the lower case 3
The structure may be fitted from below.

The check button 6 is, as shown in FIG.
It is disposed inside the lower case 3 and between the pair of power supply terminals 4 and 5, and is composed of a metal rod 7, a spring 8 and a contact plate 9.

The metal rod 7 is a rod made of a metallic material consisting of a predetermined resistor 7a at its center position, and an insulator 7b made of an insulating material around the metal rod. The structure is such that the body 7a faces, and the contact portion 7d from which the resistor 7a projects is formed at the rear end. Further, a locking piece 7e for locking the spring 8 is provided at a predetermined position on the tip side of the metal rod 7,
It has a structure in which is inserted.

Check button 6 having such a structure
First mount the spring 8 on the locking portion 3b, and then the locking piece 7e.
Is placed in contact with the inner surface of the lower case. Then, the metal rod 7 is constantly urged by the spring 8 so that the head portion 7c thereof projects outwardly of the lower case 3,
The other ends are arranged so as to face the contact plate 9 at a predetermined interval. Further, a resistor 7a made of a metal material is embedded in the center of the check button 6, and when the head 7c is pressed with a finger or the like, the contact portion 7d at the other end and the contact plate 9 come into contact with each other, and the resistor 7a Conduction is provided through 7a.

The neon lamp 10 is composed of an element 10a which emits light when a predetermined current flows, one end of which is connected to the contact plate 9 and the other end of which is connected to one power supply terminal 4. The neon lamp 10 may be any element as long as it is composed of an element that emits light, for example, a light emitting diode. Furthermore, the viewing means may be used without depending on the visual sense, or a combination of both may be used.

As shown in FIG. 5, in the plug 1 for a power source with a function having such a structure, one power source terminal 4 connected to the neon lamp 10 is connected to the positive side of the single-phase commercial AC power source. When the check button 6 is manually pressed in this state, the neon lamp 10 is turned on by being brought into conduction with the ground (GND) via the pressed finger, for example.

Therefore, if one power supply terminal 4 connected to the neon lamp 10 is connected to the AC voltage side and the other power supply terminal 5 is connected to the ground side is the correct plug insertion direction, the check button If the neon lamp 10 is turned on by pressing 6 with a finger or the like, it can be determined that the neon lamp 10 has been inserted in the correct direction.

If the neon lamp 10 does not light even if the check button 6 is pressed, the plug insertion direction may be reversed.

Thus, by simplifying the structure, even a small plug can be integrally formed in the inside thereof, and the DC power supply is not limited to the AC power supply only when necessary. Since the polarity of can be determined, it is not necessary to consider the power consumption.

Here, the structure is such that the polarity is determined by manually operating the check button 6, but it goes without saying that the structure may be such that it is automatically displayed only in a fixed direction. However, since the polarity can be determined only when the power plug is inserted, turning on the light while it is plugged wastes power consumption, so display it for a certain period of time after plugging it. May be. In this case, the circuit configuration is required accordingly.

[0020]

As described above, the power plug with a check function according to the present invention is bulky because the AC power plug having at least a pair of terminals is integrally formed with the discrimination means for discriminating the polarity. In addition, there is an extremely excellent effect that it is not necessary to separately provide a circuit for discriminating the polarity.

Further, since the discrimination means is manually displayed so that the polarity can be discriminated only when necessary, the structure can be simplified, the power consumption can be suppressed, and the structure is simple. It has an extremely excellent effect that high-precision detection can be performed.

[Brief description of drawings]

FIG. 1 is a plan view of the power supply plug with a check function according to the present invention with an upper case removed.

FIG. 2 is a right side view of the same.

FIG. 3 is a left side view of the same.

FIG. 4 is a rear view of the same.

FIG. 5 is an explanatory view showing an enlarged main part of the check button.

[Explanation of symbols]

 1 Power Supply Plug with Function 2 Upper Case 3 Lower Case 3a Supporting Member 3b Locking Part 4 One Power Supply Terminal 5 Other Power Supply Terminal 6 Check Button 7 Metal Rod 7a Resistor 7b Insulator 7c Head 7d Contact 7e Locking One piece 8 Spring 9 Contact plate 10 Neon lamp 10a Element

Claims (3)

[Claims] 1. A power supply plug having a check function, which is a power supply plug having at least a pair of terminals, and wherein the plug is integrally formed with a determination means for determining polarity. 2. The plug for a power supply with a check function according to claim 1, wherein the discrimination means is manually displayed. 3. The power source plug with a check function according to claim 1, wherein the power source is an alternating current.