KR20120080104A - Exterior case of portable electronic device having circuit for contact-less charge - Google Patents

Abstract

The present invention discloses an outer case of a portable electronic device having a contactless charging circuit. The outer case according to the present invention is an outer case for protecting a portable electronic device from external shock including a rechargeable battery and a power receiving connector for receiving electrical energy, the inner space in which the portable electronic device can be stored A case body provided; A faucet coil disposed inside the case body; A contactless charging module for converting electromotive force induced by the faucet coil into chargeable power; And a power supply module connected to an output terminal of the contactless charging module and coupled to a power receiving connector of a portable electronic device accommodated in the case body to supply power converted from the contactless charging module. It is characterized in that the rotatably installed on the case body.

Description

Exterior case of portable electronic device having circuit for contact-less charge}

The present invention relates to an external case for protecting a portable electronic device, and more particularly, to an exterior of a portable electronic device provided with a contactless charging circuit capable of charging the portable electronic device in a contactless state when the portable electronic device is stored. It's about the case.

In general, portable electronic devices such as mobile phones and PDAs are equipped with rechargeable secondary batteries (batteries). In order to charge such a secondary battery (battery), a separate charging device for providing electrical energy to a battery of a portable electronic device using a domestic commercial power source is required. Conventionally, separate contact terminals are configured on the outside of the charging device and the battery or the portable electronic device, thereby electrically connecting the charging device and the battery by connecting the two contact terminals to each other.

However, the conventional method using a contact terminal has a problem that the contact terminal is exposed to the outside, so it is not aesthetically pleasing and the contact terminal is contaminated with foreign matters so that the contact state is easily poor. In addition, when the battery is inadvertently shorted or exposed to moisture, the charging energy may be easily lost.

In order to solve the problem of the contact charging method, a contactless charging system for charging the charging device and the battery in a non-contact method has been proposed.

Republic of Korea Patent Publication No. 2002-57468, Republic of Korea Patent Publication No. 2002-57469, Republic of Korea Patent Publication No. 428,713, Republic of Korea Patent Publication No. 2002-35242 and United States Patent Publication No. 2003 / 0,210,106 Disclosed is a contactless charging system for charging a battery without a contact terminal by using an inductive coupling between a primary coil (hereinafter referred to as a 'feed coil') and a secondary coil of the battery (hereinafter referred to as a 'coil coil').

1 is a view schematically showing a contactless charging system according to the prior art.

Referring to FIG. 1, a contactless charging system according to the related art uses a charging pad 10 for generating charging power to be supplied to a battery using an external power source, and supplies the charging power to the contactless contact from the charging pad 10. And a contactless charging electronic device 15 that charges an internal battery (not shown) using the same.

The charging pad 10 receives electric energy from an external power source (for example, a commercial AC power source) and a wireless power transmission circuit 12 and a power supply coil for generating charging power for supplying the contactless charging electronic device 15. (11) is provided.

The contactless charging electronic device 15 represents a battery unit with a battery or a portable electronic device with a battery therein. In general, mobile electromagnetics include mobile phones, PDAs, MP3 players, and PMPs. The contactless charging electronic device 15 includes a power receiving coil 16 and a charging circuit 17 connected to the power receiving coil 16.

The feed coils and the feed coils 11 and 16 are magnetically coupled to each other by inductive coupling, and the feed coils 11 are juxtaposed on the feed coils 11. The magnetic field generated by this causes an induced current in the faucet coil 16. The charging circuit 17 converts the induced current to generate a predetermined power source, and charges the battery through this power source.

In the case of such a contactless charging system, the power receiving coil 16 corresponding to the power supply coil 11 and the charging circuit connected to the power receiving coil 16 are provided inside the battery unit or the portable electronic device. However, when the housing of the battery unit or the portable electronic device is made of a metal material, the electromagnetic induction phenomenon between the power supply coil 11 and the power receiving coil 16 is interfered, thereby lowering the charging efficiency. In order to solve this phenomenon, the housing material of the portable electronic device must be changed to a material other than metal.

On the other hand, in recent years, a method of charging a portable electronic device by connecting to a charging device through a power receiver connector without using a contact terminal method has been in the spotlight. In this case, there is no contact terminal in the appearance of the portable electronic device, and the design has an advantage. There was an inconvenience. Therefore, in the technical field to which the present invention belongs, there is an urgent need for a method for charging a battery in a more convenient and simple manner to a portable electronic device.

The present invention has been made to solve the problems of the prior art as described above, it is possible to easily accommodate the portable electronic device, and is provided with a contactless charging circuit for intermediary to charge the stored portable electronic device It is an object of the present invention to provide an outer case of a portable electronic device.

An outer case of a portable electronic device having a contactless charging circuit according to the present invention for achieving the above technical problem, an outer case for protecting a portable electronic device including a rechargeable battery and a power receiving connector for receiving electrical energy A case body comprising: an inner space in which the portable electronic device can be accommodated; A faucet coil disposed inside the case body; A contactless charging module for converting electromotive force induced by the faucet coil into chargeable power; And a power supply module connected to an output terminal of the contactless charging module and coupled to a power receiving connector of a portable electronic device accommodated in the case body to supply power converted from the contactless charging module. It is characterized in that the rotatably installed on the case body.

Preferably, the power supply module includes a power supply connector corresponding to the power receiver connector of the portable electronic device, and a rotation member hingeably coupled to the case body and fixed to the power supply connector on one side thereof.

Preferably, the power supply module can be exposed at an acute angle of 90 degrees or less from the case body.

Preferably, the power supply module further includes a blocking member that suppresses the rotation of the rotationable range or more.

Preferably, the rotating member of the feeding module has a hinge shaft coupled to the case body and the shaft on both sides, the hinge shaft is formed with a hole through the inside, the cable connected to the feed connector is a hole of the hinge shaft Is withdrawn through.

Preferably, the case body, the front surface of the portable electronic device has a form that can be wrapped in close contact, the base surface surrounding the back of the portable electronic device and the circumference surrounding the side of the portable electronic device Is done.

Preferably, the case body is made of a non-metallic material.

Preferably, the faucet coil and the contactless charging module are built in the base surface of the case body.

Preferably, the contactless charging module is composed of a rectifying circuit for converting the electromotive force induced from the faucet coil to a DC voltage, and a charging circuit for adjusting the DC voltage to a charging voltage for charging the battery.

Preferably, the faucet coil is arranged such that its winding central axis is perpendicular to the base surface.

According to the present invention, by providing a contactless charging device in the outer case to protect the portable electronic device, since the charging operation is performed only by a simple operation of placing the portable electronic device on the contactless charging pad in a state of being stored in the outer case This is convenient. In particular, by improving the structure of the connecting means of the outer case and the portable electronic device, the portable electronic device can be easily stored in the outer case.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and, together with the description, And shall not be interpreted.
1 is a view schematically showing a contactless charging system according to the prior art.
2 is a perspective view illustrating an outer case of a portable electronic device according to the present invention.
3 is a perspective view illustrating a configuration of a power supply module of FIG. 2.
4 is a view showing a state in which the feed module of the outer case of the portable electronic device rotates according to the present invention.
5 is a diagram illustrating an internal structure of the power supply module of FIG. 2.
6 is a view showing the internal structure of the outer case of the portable electronic device according to the present invention.
Figure 7 is a functional block diagram illustrating the function of the contactless charging module of the outer case of the portable electronic device according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

2 is a perspective view showing an outer case of the portable electronic device according to the present invention, Figure 3 is a perspective view showing the configuration of the power supply module of Figure 2, Figure 4 is a view showing the internal structure of the power supply module of Figure 2 5 is a view showing a rotation of the power supply module of the outer case of the portable electronic device according to the invention, Figure 6 is a view showing the internal structure of the outer case of the portable electronic device according to the invention, Figure 7 is a functional block diagram illustrating the function of the contactless charging module of the outer case of the portable electronic device according to the present invention.

The portable electronic device 100 according to the embodiment of the present invention includes a rechargeable battery 103, a power receiving connector 101 for transmitting electrical energy to the battery 103, and a charge protection circuit 102. Means the goods. Preferably, the portable electronic device includes a mobile phone, a PDA, a PMP, an MP3 player, and the like, and a rechargeable battery includes a lithium ion battery or a lithium polymer battery.

Referring to the drawings, the outer case 200 of the portable electronic device according to a preferred embodiment of the present invention is to protect the portable electronic device 100 from an external impact, the portable electronic device 100 can be accommodated A caseless charging module for converting the case body 210 having an internal space, the faucet coil 230 disposed inside the main body case 210, and the electromotive force induced by the faucet coil 230 into a chargeable electric power. 240 is connected to the output terminal of the contactless charging module 240 and is coupled to the power receiving connector 101 of the portable electronic device 100 accommodated in the case body 210 to connect the contactless charging module 240. It includes a power supply module 220 for supplying the power converted in.

The case body 210 may have a form in which the front surface of the portable electronic device 100 may be in close contact and be wrapped. The base body 211 and the portable electronic device may surround the rear surface of the portable electronic device 100. It consists of a circumferential bar 212 surrounding the side of the (100). In addition, the case body 210 is preferably made of a non-metal material. This is because when the case body 210 is a metallic material, the magnetic field may be distorted in the contactless charging process, which will be described later, so that the charging efficiency may be reduced. In addition, the faucet coil 230 and the contactless charging module 240 are built in the base surface 211 of the case body 210 to enable contactless charging which will be described later.

The power supply module 220 is connected to the output terminal of the contactless charging module 240, coupled to the power receiving connector 101 of the portable electronic device 100 accommodated in the case body 210, the contactless charging module ( The power converted by the 240 is supplied to the portable electronic device 100.

In the present invention, as shown in FIG. 3, the power supply module 220 may rotate to a power supply connector 221 corresponding to the power receiver connector 101 of the portable electronic device 100 and the case body 210. The hinge member is made of a rotating member 222 is fixed to the feed connector 221 on one side.

Through this configuration, as shown in FIG. 4, the power supply module 220 may expose the power supply connector 221 to the outside of the case body 210 by the rotation of the rotation member 222. Do. This may be exposed at an acute angle of 90 degrees or less from the plane of the case body 210, preferably about 15 degrees. Through this, coupling and detachment of the portable electronic device 100 to the outer case 200 of the portable electronic device can be made easier. That is, when the portable electronic device 100 is bound to the external case 200, the power supply connector 221 of the power supply module 220 is exposed to the outside of the case body 210 to feed the power supply connector 221 and the power receiving connector 101. ) May be combined first, and then the binding of the portable electronic device 100 to the outer case 200 may be made easier. On the contrary, when detaching, the main body of the portable electronic device 100 may be detached from the outer case 200, and then the detachable coupling of the power feeding connector 221 and the power receiving connector 101 may be performed.

In addition, as shown in FIG. 5, the power supply module 220 includes hinge shafts 223 coupled to the case body 210 on both sides of the rotation member 222, and the hinge shafts 223. ) Is formed with a hole 224 through the rotating member 222. This allows the cable C connected to the feed connector 221 coupled to the rotating member 222 to pass through the inside of the rotating member 222 and to be drawn out through the hole 224 of the hinge shaft 223. do. This allows the cable C connected to the feed connector 221 coupled to the rotating member 222 to pass through the inside of the rotating member 222 and to be drawn out through the hole 224 of the hinge shaft 223. do. Through this, it is possible to compactly design the structure of the power supply module 220, and even if the power supply module 220 is rotated, it is possible to exclude excessive bending or folding in the cable (C) connected to the power supply connector 221. Thereby, the reliability of the power supply connector 221 can be made high.

In addition, the power supply module 220 may further include a blocking member (not shown) to limit the rotatable range exposed to the outside of the case body 210. In addition, the power supply module 220 may further include an elastic member (not shown) for returning the exposed power supply connector 221 back to the case body 210.

As shown in FIG. 6, the faucet coil 230 is embedded in the base surface 211 of the case body 210 and is supplied with a contactless charging magnetic flux from a contactless charging pad (not shown). Generates a corresponding induced electromotive force.

The faucet coil 230 is formed of a structure in which a conductor coil wire is wound. The winding pattern may be variously changed into a circle, an ellipse, a rectangle, and the like, and the number of windings corresponds to the charge capacity of the battery 103. It depends on the conditions under which the electromotive force can be generated.

In addition, the faucet coil 230 is preferably disposed such that its winding center axis is perpendicular to the base surface 211 in order to maximize the inductive coupling efficiency of the contactless charging pad with the feed coil (not shown). Do.

As shown in FIG. 6, the contactless charging module 240 is built into the base surface 211 of the case body 210 to convert the electromotive force induced by the faucet coil 230 into a chargeable electric power. Let's do it.

The contactless charging module 240 is connected to the cable (C) connected to the feed connector 221 of the feed module 220, the output terminal of the portable electric device 100 coupled to the feed connector 221 The converted power is supplied to the connector 101 side so that it can be charged.

Hereinafter, the function of the contactless charging module of the outer case of the portable electronic device of the present invention will be described with reference to FIG.

As shown in FIG. 7, the contactless charging module 240 has a level suitable for the rectifier circuit 241 for converting alternating current into direct current and the battery 103 for charging the direct current converted by the rectifying circuit 241. The charging circuit 242 is replaced with. For example, the charging circuit 242 may include a constant voltage / constant current circuit (CVCC) for appropriately adjusting the rectified DC voltage in order to charge the lithium-based secondary battery in the constant voltage mode and the constant current mode.

In addition, the contactless charging module 240 may further include means for sensing the battery 103 status information, and wirelessly feeds it back to a contactless charging pad (not shown). That is, the internal circuit configuration of the contactless charging module 240 is supplied with power from the contactless charging pad to the contactless, and of course, various modifications are possible to transfer it to the portable electronic device (100).

In addition, the portable electronic device 100 of the present invention includes a power receiving connector 101 corresponding to the power feeding connector 221, a battery 103, and a charge protection circuit 102.

The charge protection circuit 102 is electrically connected to the contactless charging module 240 by connecting the power feeding connector 221 and the power receiving connector 101 to protect the battery 103 from overvoltage or overcurrent. Perform the function.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

100: portable electronic device 200: outer case
210: case body 220: power supply module
230: Faucet coil 240: Solid state charging module

Claims (11)

In an outer case for protecting a portable electronic device comprising a rechargeable battery and a power receiving connector for receiving electrical energy,
A case body provided with an inner space for accommodating the portable electronic device;
A faucet coil disposed inside the case body;
A contactless charging module for converting electromotive force induced by the faucet coil into chargeable power; And
And a power supply module connected to an output terminal of the contactless charging module and coupled to a power receiving connector of a portable electronic device accommodated in the case body to supply power converted from the contactless charging module.
The power supply module is an outer case of a portable electronic device, characterized in that installed in the case body rotatably. The method of claim 1,
The power supply module,
An outer case of a portable electronic device comprising a feed connector corresponding to the power receiving connector of the portable electronic device, and a rotating member hinged to the case main body and fixed to the feed connector on one side. The method of claim 2,
The power supply module,
An outer case of a portable electronic device, characterized in that the exposure is possible at an acute angle of 90 degrees or less from the case body. The method of claim 3,
The power supply module,
An outer case of a portable electronic device, characterized in that it further comprises a blocking member for suppressing rotation beyond the range of rotation. The method of claim 4, wherein
Rotating member of the power supply module is an outer case of a portable electronic device, characterized in that the hinge shaft is coupled to the case body and the shaft on both sides. The method of claim 5,
The hinge shaft of the pivot member is formed with a hole through the inside,
The outer case of the portable electronic device, characterized in that the cable connected to the feed connector is drawn out through the hole of the hinge shaft. The method of claim 1,
The case body,
The front of the portable electronic device has a form that can be wrapped close to the open,
An outer case of the portable electronic device, characterized in that the base surface surrounding the back of the portable electronic device, and a circumferential bar surrounding the side of the portable electronic device. The method of claim 7, wherein
The case body is an outer case of a portable electronic device, characterized in that made of a non-metal material. The method of claim 7, wherein
The outer case of the portable electronic device, characterized in that the faucet coil and the contactless charging module is built in the base surface of the case body. 10. The method of claim 9,
The contactless charging module,
An external case of a portable electronic device comprising a rectifying circuit for converting the electromotive force induced from the power receiving coil into a direct current voltage, and a charging circuit for adjusting the direct current voltage to a charging voltage for charging the battery. 10. The method of claim 9,
The faucet coil is an outer case of a portable electronic device, characterized in that the winding central axis is arranged perpendicular to the base surface.

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