Charging system having circuit for delaying power supply

Provided is a charging system having a circuit for delaying power supply, and more particularly, a charging system having a circuit for delaying power supply installed on a side of a power supply apparatus, wherein the circuit for delaying power supply prevents a spark from being generated when an electronic device and the power supply apparatus are connected to each other.The circuit for delaying power supply blocks the power supply to the Vcc power terminal in the case in which the GND ground power terminal and the D signal terminal are not in an electrically shorted state and releases the blocking of the power supply to the Vcc power terminal because an operation of the transistor is changed and a charging state of the capacitor is changed in the case in which the GND ground power terminal and the D signal terminal become the electrically shorted state.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority under 35 U.S.C. §119 to Korean Patent Application No. 10-2013-0077386, filed on Jul. 2, 2013, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The following disclosure relates to a charging system having a circuit for delaying power supply, and more particularly, to a charging system having a circuit for delaying power supply installed on a side of a power supply apparatus, wherein the circuit for delaying power supply prevents a spark from being generated when an electronic device and the power supply apparatus are connected to each other in supplying power to the electronic device requiring a supply of a relatively large amount of current.

BACKGROUND

When a power supply apparatus (e.g., an apparatus supplying power to an electronic device, such as an adaptor, or the like) is connected to the electronic device, the power supply apparatus and the electronic device may be connected to each other by a magnetic connector.

Patent Document 1 and Patent Document 2 disclose technologies in which the electronic device and the power supply apparatus are connected to each other by the magnetic connector.

Since the magnetic connector disclosed in Patent Document 1 and Patent Document 2 connects the electronic device and the power supply apparatus to each other in the case in which the electronic device and the power supply apparatus contact only at a specific angle and use a plurality of V+ pin and V− pin having a symmetrical structure, it is not economical. Patent Document 3 discloses a technology in which electrodes of a magnetic connector are concentrically formed so that the electronic device and the power supply apparatus may be electrically connected to each other even in the case in which they are rotated at any angle and contact each other.

However, when the electronic device and the power supply apparatus are connected to each other by the magnetic connector, a spark may be generated in the moment of the connection, may affect the electronic device and the power supply apparatus, and cause a failure. In Patent Document 3, in readiness for a case in which a power supply terminal in the power supply apparatus is electrically shorted, a power delaying circuit unit is installed in the power supply apparatus. However, the invention disclosed in Patent Document 3 is effective in a charging apparatus of a mobile terminal (e.g., a smart phone) consuming a relatively small amount of current, but is not effective in a tablet PC, a notebook computer, and the like consuming a large amount of current.

Patent Document 4 discloses a magnetic connector module including a circuit for blocking power supply. When the circuit for blocking power supply is installed in the power supply apparatus, the spark is decreased in the moment of the connection, but it is not sufficient.

Patent Document 5 discloses a technology allowing power to be supplied to the electronic device after a predetermined time is elapsed when connecting the electronic device and the power supply apparatus to each other by the magnetic connector by installing a circuit for preventing a charging terminal foreign material occurrence on a side of the electronic device. However, a circuit for preventing a spark occurrence may need to be installed on a side of the power supply apparatus, but the circuit for preventing the charging terminal foreign material occurrence may be installed only on a side of the electronic device and may not be installed on a side of the power supply apparatus.

As disclosed in Patent Document 3 or Patent Document 4, in the case in which the electrodes are concentrically formed on a side of the electronic device, since the electrodes on an outer circle are formed to be very long, two pin terminals of V+ and V− on a side of the power supply apparatus may instantaneously contact one electrode, thereby causing overload on a side of the power supply apparatus.

RELATED ART DOCUMENT

Patent Document

SUMMARY

An embodiment of the present invention is directed to providing a charging system in which a circuit for preventing a spark from being generated when an electronic device and the power supply apparatus are connected to each other in supplying power to the electronic device requiring a supply of a relatively large current is installed on a side of the power supply apparatus.

Another embodiment of the present invention is directed to providing a charging system preventing a risk of overload generated on a side of a power supply apparatus even in the case in which two pin terminals V+ and V− on a side of the power supply apparatus instantaneously and simultaneously contact one electrode when electrodes are concentrically formed on a side of an electronic device.

In one general aspect, a charging system having a circuit for delaying power supply includes: an electronic device having a pattern electrode concentrically formed thereon and having a magnet of the electronic device; and a charging apparatus having a plurality of pin terminals formed therein and having a magnet of the charging apparatus, wherein the magnet of the electronic device and the magnet of the charging apparatus are magnetically coupled to each other to thereby contact the pattern electrode and the plurality of pin terminals, the plurality of pin terminals include a Vcc power terminal, a GND ground power terminal, and a D signal terminal, the pattern electrode includes a Vcc electrode and a GND electrode, the GND electrode of the pattern electrode is formed of one electrode which is simultaneously in contact with the GND ground power terminal and the D signal terminal, the charging apparatus includes the circuit for delaying power supply, the circuit for delaying power supply includes a transistor and a capacitor, and the circuit for delaying power supply blocks the power supply to the Vcc power terminal in the case in which the GND ground power terminal and the D signal terminal are not in an electrically shorted state and releases the blocking of the power supply to the Vcc power terminal because an operation of the transistor is changed and a charging state of the capacitor is changed in the case in which the GND ground power terminal and the D signal terminal become the electrically shorted state.

In another general aspect, a charging system having a circuit for delaying power supply includes: an electronic device having a pattern electrode concentrically formed thereon and having a magnet of the electronic device; and a charging apparatus having a plurality of pin terminals and a switch formed therein and having a magnet of the charging apparatus, wherein the magnet of the electronic device and the magnet of the charging apparatus are magnetically coupled to each other to thereby contact the pattern electrode and the plurality of pin terminals and press the switch, the plurality of pin terminals include a Vcc power terminal and a GND ground power terminal, the pattern electrode includes a Vcc electrode and a GND electrode, the charging apparatus includes the circuit for delaying power supply, the circuit for delaying power supply includes a transistor and a capacitor, and the circuit for delaying power supply blocks the power supply to the Vcc power terminal in the case in which the switch is not pressed and releases the blocking of the power supply to the Vcc power terminal because an operation of the transistor is changed and a charging state of the capacitor is changed in the case in which the switch is pressed.

The magnet of the electronic device and the magnet of the charging apparatus may have a ring shape.

The electronic device may include an electrode part, the electrode part may include a circular substrate formed of a circular double-sided printed circuit board (PCB), the Vcc electrode and the GND electrode may be formed on a top surface of the circular substrate, two pads may be formed on a bottom surface of the circular substrate and may be connected to lead wires, and the Vcc electrode and the GND electrode may be connected to the two pads through two through-holes formed in the circular substrate.

The charging apparatus may include a body part of the charging apparatus and a pin terminal part.

The circuit for delaying power supply may be installed on the body part of the charging apparatus.

The circuit for delaying power supply may be installed on the pin terminal part.

[Detailed Description of Main Elements]100: electronic device110: electrode part111: Vcc electrode112: GND electrode114: circular substrate115: magnet of electronic device116: housing of electrode part200: charging apparatus210: pin terminal part211: Vcc power terminal212: GND ground power terminal213: D signal terminal214: circuit for delaying power supply215: magnet of charging apparatus216: housing of pin terminal part218: switch220: body part of charging apparatus230: cable

DETAILED DESCRIPTION OF EMBODIMENTS

The advantages, features and aspects of the present invention will become apparent from the following description of the embodiments with reference to the accompanying drawings, which is set forth hereinafter. The present invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

FIG. 1is a plan view of a charging system according to an exemplary embodiment of the present invention.

A charging system according to an exemplary embodiment of the present invention may include an electronic device100and a charging apparatus200. An example of the charging apparatus200may include an adaptor. The charging apparatus100may include a pin terminal part210and a body part220, wherein the pin terminal part210of the charging apparatus and the body part220of the charging apparatus may be connected to each other by a cable230. The electronic device100may include an electrode part110.

A magnet is embedded in the pin terminal part210and the electrode part110, respectively, such that the pin terminal part210and the electrode part110become contact each other by magnetic force of the magnet. Since a magnetic connector contacting a connecting terminal by the magnetic force of the magnet is a known technology, a detailed description thereof will be omitted.

FIGS. 2A and 2Bare perspective views of an electrode part and a pin terminal part according to an exemplary embodiment of the present invention.FIGS. 2A and 2Bare perspective views when viewing the electrode part and the pin terminal part at different angles. The perspective views ofFIGS. 2A and 2Bshow a portion of components in a cut state to easily understand an internal structure of the electrode part and the pin terminal part.

The electrode part110may include a housing116of the electrode part and a circular substrate114formed in the housing116. The circular substrate114may have a Vcc electrode111and GND electrode112formed thereon and the housing116of the electrode part may have a magnet115of the electronic device installed therein.

The Vcc electrode111and the GND electrode112may be formed in a concentric shape as shown inFIG. 2. As such, a shape in which a plurality of electrode are formed in a predetermined shape is referred to as “pattern electrode” in the present application and the Vcc electrode111and the GND electrode112may form a pattern electrode having a concentric shape.

The pin terminal part210may include a housing216of the pin terminal part and a magnet215of the charging apparatus may be installed in the housing216of the pin terminal part. The pin terminal part210may be provided with three pin terminals, that is, a Vcc power terminal211, a GND ground power terminal212, and a D signal terminal213.

The housing116of the electrode part and the housing216of the pin terminal part may be preferably formed of a nonconductor.

As a method of efficiently manufacturing the electrode part110, a method in which two lead wires are connected to the Vcc electrode111and the GND electrode112and a shape is then manufactured by a plastic injection may be contemplated. More preferably, the circular substrate114is formed of a circular double-sided printed circuit board, two electrodes are formed on a top surface of the circular substrate114and two pads are formed on a bottom surface thereof to be connected to the lead wires, as shown inFIGS. 2A and 2B, and the two electrodes and the two pads are connected to each other through two through-holes on the circular substrate114, such that the electrode part110having a thin thickness and reliability may be cheaply manufactured.

The two electrodes are formed on the top surface of the circular substrate114and two lead wires are connected to the two electrodes through the two through-holes on the circular substrate114, such that the electrode part110having a thin thickness and reliability may be cheaply manufactured.

The three pin terminals may be formed of a metal having elasticity to efficiently maintain a contact with the Vcc electrode111and the GND electrode112of the electrode part110.

The electrode part110and the pin terminal part210contact each other by attractive force due to magnetic force between the magnet115of the electronic device and the magnet215of the charging apparatus. When the electrode part110and the pin terminal part210contact each other, the Vcc power terminal211contacts the Vcc electrode111and the GND ground power terminal212and the D signal terminal213contact the GND electrode112.

As shown inFIG. 2, in the case in which the magnet115of the electronic device and magnet215of the charging apparatus are formed in a ring shape, the electrode part110and the pin terminal part210may contact each other by being rotated at any angle and may be miniaturized to be thinly manufactured.

FIG. 3is a conceptual view of a charging system according to an exemplary embodiment of the present invention.

The charging system according to an exemplary embodiment of the present invention may be installed with a circuit214for delaying power supply.

The circuit214for delaying power supply may be installed on the pin terminal part210, as shown inFIG. 3. However, the circuit214for delaying power supply may be installed on the body part220of the charging apparatus.

After the GND ground power terminal212and the D signal terminal213contact the GND electrode112to be electrically shorted and a predetermined time is elapsed, the circuit214for delaying power supply initiates the power supply to the Vcc power terminal211and the GND ground power terminal212.

The circuit214for delaying power supply may be implemented by various methods.

FIG. 4shows an example of a circuit for delaying power supply according to an exemplary embodiment of the present invention.

In a state in which the electrode part110and the pin terminal part120do not contact each other, a Q3gate becomes “H” state, such that the Q3becomes a turn-on state. In this case, a Q2becomes a turn-off state and a main switch Q1becomes a turn-off state, such that a Vcc output is not output.

If the electrode part110and the pin terminal part120normally contact each other, an input state of the D signal terminal213may be changed from No connection (N/C) to GND. In this case, the Q3gate becomes “L” state and the Q3becomes the turn-off state, a capacitor C1may be charged through a path of a resistor R2and the C1. When a predetermined time is elapsed, the C1is charged up to a predetermined level or more, such that the Q2becomes the turn-on state and the main switch Q1also becomes the turn-on state, thereby outputting the Vcc output. In this case, a delay time may be adjusted by values the R2and C1.

FIG. 5shows a shape in which a Vcc power terminal and a GND ground power terminal contact one electrode. That is, before the electrode part110and the pin terminal part120normally contact each other, the Vcc power terminal211and the GND ground power terminal212may instantaneously contact the GND electrode112. If so, in the case in which the circuit214for delaying power supply and the D signal terminal213are not present, a spark may be generated and damage to the apparatus may be caused. However, according to the present invention, since the circuit214for delaying power supply and the D signal terminal213block the power supply, the spark is not generated.

FIG. 6is a conceptual view of a charging system according to another exemplary embodiment of the present invention.

According to an exemplary embodiment of the present invention shown inFIG. 6, the pint terminal part210may have a switch218which is formed instead of the D signal terminal213. The switch218may be pressed when the magnet of the electronic device and the magnet of the charging apparatus are magnetically coupled, and may connect a D input of the circuit for delaying power supply and a ground input GND to each other only in the pressed state.

If the switch218is not pressed, the D input of the circuit of delaying power supply becomes the no connection (N/C) state, such that the circuit for delaying power supply may block the power supply. If the switch218is pressed, the D input of the circuit for delaying power supply is connected the ground input (GND), such that the block of the power supply may be released after a predetermined time is elapsed.

As in an exemplary embodiment of the present invention shown inFIG. 6, if the switch218is formed instead of the D signal terminal213, an exposed portion of the switch218may be formed of not a metal but a plastic which is a nonconductor, and since the switch218may be installed at any portion as well as a portion corresponding to the GND electrode112, it may be more stably formed while having a small size. In addition, in the case in which a groove is formed at a corresponding portion of the electrode part110to which a button (key) of the switch218contacts, since power is output only when the contacting position precisely matches the groove, a more safe magnetic connector may be provided.

According to the embodiment of the present invention, in the charging system having the circuit for delaying power supply configured as described above, when supplying power to the electronic device requiring the supply of the relatively large amount of current, the circuit for preventing the spark occurrence when the electronic device and the power supply apparatus are connected to each other may be installed on the side of the power supply apparatus.

In addition, when electrodes are concentrically formed on a side of an electronic device, even in the case in which two pin terminals V+ and V− on the side of the power supply apparatus instantaneously and simultaneously contact one electrode, the risk of the overload generated on the side of a power supply apparatus may be prevented.