KR200270331Y1 - Power cord having a sensing capability of the status of load - Google Patents

Abstract

The present invention relates to a power cord, and more particularly to a load-aware power cord. The present invention relates to a power cord that displays whether the load is operating and current is on or whether the power supply is interrupted while the load is off.

The present invention provides a light emitting device or an analog / digital meter that indicates whether the current plugged into a wall outlet or the current is in use by a user, or by inadvertently unplugging the power cord. It can prevent the damage.

Description

POWER CORD HAVING A SENSING CAPABILITY OF THE STATUS OF LOAD}

The present invention relates to a power cord, and more particularly to a load-aware power cord. The present invention relates to a power cord that displays whether the load is operating and current is on or whether the power supply is interrupted while the load is off.

Modern people use many electronic devices and electrical appliances in their daily lives. In other words, home appliances such as televisions and refrigerators, computers, and communication electronic devices are used. However, in order to use many electronic devices at home or at work, power cords are connected to each other using an outlet or a power strip.

1A and 1B are diagrams illustrating a power cord connected to an outlet or a multi tap according to the prior art.

1A and 1B, power cords connected through an outlet are intertwined with each other, making it difficult to distinguish which cord is connected to which electronic device. In particular, when multiple power cords are entangled with each other using a multi-tap as in the case of FIG.

As a result, if a user wants to disconnect power by disconnecting a specific power cord from an outlet or a power strip, or if the user does not have enough outlet power and wants to unplug an unused power cord to power another electronic device, Often, the power cord from the device is unplugged by mistake.

In particular, if the accidentally unplugged power cord is a cord connected from a running computer, the computer system may cause serious problems such as damage to the hard disk or damage to system files due to sudden power outages.

Accordingly, a first object of the present invention is to provide a power cord that prevents damage to a device in use by disconnecting the power cord from a power source without checking whether an operation state of an electric device is in use.

A second object of the present invention is to provide, in addition to the first object, a power cord having a display device indicating whether a connected electric device is in use or in an off state.

It is a third object of the present invention to provide a power code that, in addition to the first object, makes it possible to identify whether it is in a current conduction state or a current off state.

1A and 1B illustrate a power cord connected to an outlet or power strip according to the prior art;

2a to 2c show a preferred embodiment of a load aware power cord according to the present invention;

Fig. 2B shows an embodiment in which a load recognition unit is built in the plug and the light emitting display unit is installed on the surface of the plug.

3 is a diagram showing the configuration of a load recognition unit circuit constituting a load recognition power code according to the present invention;

<Explanation of symbols for the main parts of the drawings>

10: outlet

20: plug

30: electrical appliance

40: load recognition unit

43: induction current converter

44: rectifier

45: switch unit

46: light emitting display unit

50: wires

In order to achieve the above object, in the power cord consisting of a plug for connecting to an outlet for supplying AC power and a wire for connecting the electrical equipment receiving the AC power, induction coupled to detect the current flowing through the wire A current converter; A rectifier for rectifying the output voltage of the inductive current converter; A switch unit which senses an output voltage of the rectifier unit and compares the output voltage with a predetermined threshold value; And a light emitting display unit which is turned on and off by an output voltage of the switch unit, and includes a load recognition unit displaying a state of conduction of the wire.

The present invention configures a light emitting display unit on one surface of a plug or a surface of a wire constituting the power cord, thereby displaying whether the wire is in an electrical conduction state or a power off state, thereby allowing the user to turn on the power cord. It is effective to prevent the mistake of unplugging the plug.

Hereinafter, with reference to the accompanying drawings Figures 2 to 4 will be described in detail a preferred embodiment of the present invention.

2a to 2c are diagrams showing a preferred embodiment of the load-aware power cord according to the present invention. Figure 2a shows an embodiment in which the load recognition unit 40 according to the present invention is configured independently of the plug 20 around. Referring to FIG. 2A, the light emitting display unit 46 is exposed on the surface of the load recognition unit 40. In Fig. 2A, reference numerals 10 and 30 denote outlets and electrical equipment, respectively.

On the other hand, as another preferred embodiment of the present invention, an embodiment in which the load recognition unit is embedded in the plug 20 and the light emitting display unit 46 is installed on the surface of the plug 20 is shown in Fig. 2b. That is, the light emitting display unit may flicker when the current is conducted to the electric wire and may not be turned on when the electric current is not conducted.

Figure 2c is another preferred embodiment of the load-aware power cord according to the present invention, the main circuit portion of the load-aware unit is embedded in the plug 20 or the electric device 30 and only the display unit 46 is installed on the wire It is a figure which shows.

3 is a diagram illustrating a configuration of a load recognition unit circuit constituting a load recognition power code according to the present invention. Referring to FIG. 3, first, an induction current converter 43 is used to detect whether current is being conducted or is not flowing in the wire 50 between the plug 20 and the electric device 30 plugged into the outlet 10. ) Is configured.

The induction current converter according to the present invention may use an inductive coil transformer inductively coupled to an alternating current that changes in time. On the other hand, the output voltage from the induction current converter 43 is converted into a DC power supply through the rectifier 44, a diode bridge circuit can be applied as a preferred embodiment.

Subsequently, the output of the rectifying section 44 is connected to the switch section 45. The switch section 45 compares the output voltage of the rectifying section 44 with a predetermined threshold value, and if the current is greater than the threshold value, the current in the wire It determines the flow and serves as a switch to emit the light emitting display unit 46. As a preferred embodiment of the switch unit 45 according to the present invention, it can be implemented using an RC charging circuit and a switching transistor, it is also possible to implement as a comparator.

Referring back to FIG. 3, the output of the switch 45 is connected to the light emitting display 46 to switch the light emitting device on / off. As a preferred embodiment of the present invention, an LED can be used as the light emitting display element. In another embodiment according to the present invention, the rectifying portion 44 and the switch portion 45 are omitted and the direct induction current converting portion 43 is omitted. And the load recognition unit may be configured using only the light emitting display unit 46. That is, by winding the coil with an induction current converter 43 for detecting the current flowing in the power cord and connecting the light emitting diodes at both ends of the coil, when the current is conducted to the power cord, the light is turned on in the light emitting diode. In this case, a variable resistor may be connected to the light emitting diode in order to adjust the intensity of the light appearing on the light emitting diode and to adjust the threshold brightness for detecting the conduction. As a variable resistor, it can be used in the range of 2 kW to 2 kW. In addition, as a preferred embodiment of the induction coil according to the present invention, it can be used with a rated current of 10 A, secondary wire resistance 2 kW, secondary output voltage 10 V ± 1 V.

In the above, as a preferred embodiment of the present invention, a light emitting diode is illustrated as a display device indicating whether a current is conducted to a power cord. However, in addition to the light emitting display device, an electric current state that is challenged using an analog meter or a digital meter is used. Can be marked.

The foregoing has outlined rather broadly the features and technical advantages of the subject innovation in order to better understand the claims of the subject matter described below. Additional features and advantages constituting the claims of the present invention will be described below. It should be recognized by those skilled in the art that the conception and specific embodiment of the present invention can be used immediately as a basis for designing or modifying other structures for carrying out similar purposes as the present invention.

In addition, the inventive concept and embodiments disclosed in the present invention may be used by those skilled in the art as a basis for modifying or designing other structures for carrying out the same purposes of the present invention. In addition, such modifications or altered equivalent structures by those skilled in the art can be variously changed, substituted and changed without departing from the spirit or scope of the invention described in the claims.

As described above, the present invention is provided with a light emitting device that directly indicates around the plug or around the wire whether or not the current is being used and is currently being used for the electric wire plugged into the outlet, and the user inadvertently pulls out the power cord to damage the electric device. It can prevent the coating.

Claims (6)

In the power cord consisting of a plug for connecting to an outlet for supplying AC power and a wire for connecting the electrical equipment supplied with the AC power, An induction current converting unit for inductively coupling and detecting a current flowing through the wire; And A light emitting display unit which is turned on or off by an output voltage of the inductive current converter. And a load acknowledgment unit for displaying a state of whether the wire is conductive. The power cord according to claim 1, wherein the inductive current converting unit constituting the load recognition unit is provided in the plug, and the light emitting display unit is installed to be exposed to the plug surface. According to claim 1, wherein the load recognition unit is installed around the wire around the center, and the light emitting display unit is installed so as to be exposed to the surface of the load recognition unit to determine whether the wire is in an electrical conduction state or a power off state. Indicating power cord. The power cord of claim 1, wherein the load acknowledgment unit is installed inside the wire and the light emitting display unit is exposed to one surface of the wire to indicate whether the wire is in an electrically conductive state or a power off state. delete In the power cord consisting of a plug for connecting to an outlet for supplying AC power and a wire for connecting the electrical equipment supplied with the AC power, An induction current converting unit for inductively coupling and detecting a current flowing through the wire; A rectifier for rectifying the output voltage of the inductive current converter; Display unit for detecting and displaying the output voltage of the rectifier And a load acknowledgment unit for displaying a state of whether the wire is conductive.