KR20120110674A - Wireless charger for portable device - Google Patents

Abstract

The present invention relates to a wireless charging device for a portable terminal, and a wireless charging device for a portable terminal equipped with a wireless charging system using an induced electromotive force.
Wireless charging device for a mobile terminal of the present invention, the charger with a transmission coil therein; A power receiving coil magnetically coupled to the power transmission coil to generate an induction electromotive force, the charging case configured to charge a mobile terminal, wherein the charger comprises: a housing having the charging case disposed on the top; A plate mounted inside the housing and protruding to form a core in an upward direction in which the charging case is disposed so that the power transmission coil is wound around the core; A power transmission circuit module connected to an external power source to apply current to the power transmission coil; It is coupled to the inside of the housing, the plate is mounted on the upper to support the plate in an upward direction, characterized in that consisting of a support member for mounting the power transmission circuit module in the lower portion.

Description

Wireless charging device for mobile terminal {WIRELESS CHARGER FOR PORTABLE DEVICE}

The present invention relates to a wireless charging device for a portable terminal, and a wireless charging device for a portable terminal equipped with a wireless charging system using an induced electromotive force.

Portable terminals such as mobile communication terminals and PDAs are equipped with rechargeable secondary batteries (batteries).

In order to charge the secondary battery (battery), a separate charging device for providing electrical energy to the battery of the portable terminal using a commercial power source for the home is required.

Typically, a separate contact terminal is configured on the outside of the charging device and the battery, thereby electrically connecting the charging device and the battery by connecting the two contact terminals to each other.

However, when the contact terminal protrudes to the outside as described above, there is a problem in that the contact state is not good and the contact terminal is contaminated with external 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 non-contact charging system for charging a charging device and a battery in a contactless manner has been proposed.

1 is a perspective view of a conventional wireless charging battery case, Figure 2 is a perspective view of a conventional wireless charging device.

Conventional wireless charging device as shown in Figure 1 and 2, the battery case 150 and the charging pad 200.

A battery inlet 103 is formed in the battery case 150 so that the battery 10 of the portable terminal is inserted into the battery inlet 103.

The portable terminal battery 10 is inserted into the battery inlet 103 to be in contact with a terminal formed inside the battery inlet 103.

The battery case 150 may have a terminal contacting the battery 10 in the battery inlet 103 to be contaminated with external foreign matters, thereby preventing the problem of poor contact state, and the battery 10 It is possible to minimize the loss of charging energy due to short circuit or exposure to moisture.

In addition, the battery case 150 is equipped with a power receiving coil 101 and a charging module 102.

The battery case 150 is disposed above the charging pad 200 when the battery 10 is being charged.

A power transmission coil 201 is formed on the charging pad 200 and a power cable 202 is connected to apply a current to the power transmission coil 201.

When a current is applied to the power transmission coil 201, a magnetic field is formed around the power transmission coil 201, and the power transmission coil 201 and the power reception coil 101 are magnetically coupled to the power reception coil 101. Induced electromotive force is generated in the charging module 102 to convert the induced electromotive force into a DC voltage to charge the portable terminal battery (10).

However, the conventional charging device for a portable terminal as described above has a problem that it is cumbersome and inconvenient to charge the portable terminal because the battery has to be separated from the portable terminal and inserted into the battery case 150 in order to charge the portable terminal wirelessly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to provide a wireless charging device for a portable terminal, which is convenient for charging the portable terminal by charging the portable terminal wirelessly without separating the portable terminal and the battery.

In order to achieve the above object, a wireless charging device for a portable terminal of the present invention includes a charger having a transmission coil mounted therein; A power receiving coil magnetically coupled to the power transmission coil to generate an induction electromotive force, the charging case configured to charge a mobile terminal, wherein the charger comprises: a housing having the charging case disposed on the top; A plate mounted inside the housing and protruding to form a core in an upward direction in which the charging case is disposed so that the power transmission coil is wound around the core; A power transmission circuit module connected to an external power source to apply current to the power transmission coil; It is coupled to the inside of the housing, the plate is mounted on the upper portion to support the plate in the upper direction, the lower portion is made of a support member for mounting the power transmission circuit module.

The charger further comprises a magnetic force portion disposed around the plate, the charging case is mounted with a magnetic material to attach the charging case to the upper portion of the housing by the magnetic force of the magnetic portion, the magnetic force portion, in the vertical direction Polarized first magnets; A second magnet polarized in a direction opposite to the first magnet; It is mounted to the lower portion of the first magnet and the second magnet and consists of a yoke to induce the flow of the magnetic field generated in the first magnet and the second magnet.

A seating portion into which a lower portion of the magnetic force portion is inserted is formed at an upper portion of the support member, and an insertion portion into which the magnetic force portion is inserted is formed to protrude downward from the inner upper surface of the housing.

The yoke is provided with protrusions protruding to both sides, and the insertion portion presses the upper end of the protrusion to fix the magnetic force portion between the housing and the support member.

Fixing protrusions protrude in an up and down direction on an inner surface of the housing, and fixing grooves in which the fixing protrusions are inserted are formed on an outer side of the support member.

The charging case is provided with a coupling part to which the portable terminal is coupled, and a connector protruding toward the coupling part is mounted, and the induction electromotive force generated by the faucet coil is converted into a DC voltage and transferred to the connector inside the charging case. Is equipped with a charging circuit module, the connector is inserted into the portable terminal coupled to the coupling portion is charged with the portable terminal.

The wireless charging device for a mobile terminal according to the present invention has the following effects.

By charging the portable terminal wirelessly using a charging case and a charger coupled to the portable terminal, the portable terminal can be conveniently charged without having to separate the battery of the portable terminal.

In addition, the yoke is mounted on the first magnet and the second magnet polarized in opposite directions to induce the flow of the magnetic field generated in the first magnet and the second magnet, thereby increasing the magnetic force acting on the magnetic body charger and charging case Can increase the adhesion.

In addition, the magnetic force portion can be easily fixed between the housing and the support member by inserting the lower portion is inserted into the mounting portion and the insertion portion formed inside the housing.

In addition, a fixing protrusion protrudes from the inner side of the housing, and a fixing groove into which the fixing protrusion is inserted is formed on the outer side of the support member, thereby preventing the support member from flowing in the horizontal direction inside the housing.

1 is a perspective view showing a conventional battery case for wireless charging,
2 is a perspective view showing a conventional wireless charging device for a mobile terminal,
3 is a perspective view of a wireless charging device for a mobile terminal according to an embodiment of the present invention,
4 is a perspective view of a charger according to an embodiment of the present invention;
5 is an exploded perspective view of a charger in accordance with an embodiment of the present invention;
6 is an exploded perspective view of another direction of the charger according to the embodiment of the present invention;
FIG. 7 is a cross-sectional view taken along line AA of FIG. 4;
8 is a perspective view of a magnetic force unit according to an embodiment of the present invention;
9 is a sectional view taken along line BB of FIG.
10 is an exploded perspective view of a charging case according to an embodiment of the present invention;

3 is a perspective view of a wireless charging device for a portable terminal with a charging case attached to the charger, Figure 4 is a perspective view of a charger according to an embodiment of the present invention, Figure 5 is one direction of a charger according to an embodiment of the present invention 6 is an exploded perspective view of the charger according to the embodiment of the present invention. FIG. 7 is a cross-sectional view taken along line AA of FIG. 4, and FIG. 8 is a perspective view of the magnetic part according to the embodiment of the present invention. 9 is a cross-sectional view of a charging case attached to the upper part of the charger in the cross-sectional view taken on line BB of FIG. 4, and FIG. 10 is an exploded perspective view of the charging case according to the exemplary embodiment of the present invention.

As shown in FIG. 3, the wireless charging device for a portable terminal according to the present invention includes a charger 100 and a charging case 200, and the charging case 200 in which the portable terminal 300 is coupled to the charger. Attached to the top of the (100) to charge the mobile terminal 300.

In detail, the charger 100 includes a housing 110 and 111, a plate 120, a power transmission circuit module 130, a support member 140, and a magnetic force unit 150, as shown in FIGS. 4 to 6.

The housings 110 and 111 are attached to the charging case 200 at the top of the portable terminal 300 when charging.

The housings 110 and 111 are formed of a base 110 and a housing body 111.

The base 110 is formed in a rectangular shape as shown in Fig. 5 or 6, the plate 120, the power transmission circuit module 130, the support member 140 and the magnetic force 150 is disposed on the top do.

The housing body 111 is formed in a hexahedral shape and is mounted on the base 110 to cover the plate 120, the power transmission circuit module 130, the support member 140, and the magnetic force part 150.

And, as shown in Figure 6, the insertion portion 112 is formed on the inner upper surface of the housing body 111.

The insertion part 112 protrudes downward from the inner upper surface of the housings 110 and 111, that is, the housing body 111, and the magnetic force part 150 is inserted therein.

In addition, fixing protrusions 113 are formed on the inner surfaces of the housings 110 and 111 in the vertical direction.

The fixing protrusion 113 is formed to protrude in the direction facing each other on both inner sides of the housing body 111 as shown in FIG.

The fixing protrusion 113 is inserted into the fixing groove 141 to be described later.

The plate 120 is mounted inside the housings 110 and 111.

Specifically, as shown in FIG. 5, the mounting portion 121 protruding upward is formed on the outer side of the plate 120 so that the upper end of the mounting portion 121 is fixedly mounted on the inner upper surface of the housing body 111. .

In addition, the plate 120 is fixedly mounted on top of the support member 140.

In addition, the core 122 protrudes upward from the center of the plate 120 to which the charging case 200 is attached.

The transmission coil 123 is wound around the core 122 at the upper portion of the plate 120.

The power transmission coil 123 is wound around the core 122 to form a magnetic field around the power transmission coil 123 when a current is applied by the power transmission circuit module 130, and surrounds the power transmission coil 123. The magnetic field formed therein moves upward along the core 122 such that the power transmission coil 123 and the power receiving coil 213 mounted to the charging case 200 are magnetically coupled.

The power transmission circuit module 130 is connected to an external power source to apply a current to the power transmission coil 123.

As shown in FIG. 9, the power transmission circuit module 130 is equipped with a power socket 131 that communicates with the outside and is connected to an external power source.

The external power source as described above supplies power to the power transmission circuit module 130 using a common household AC current.

In addition, the power transmission circuit module 130 and an electronic device such as a computer may be connected with a USB cable to supply power to the power transmission circuit module 130.

The support member 140 is coupled to the inside of the housings 110 and 111, and the plate 120 is mounted on an upper portion thereof to support the plate 120 in an upward direction, and the power transmission circuit module 130 is disposed below. Is mounted.

The support member 140 is formed in a rectangular shape as shown in Figures 5 and 6, the fixing groove 141 is formed is inserted into the fixing projection 113 on the outside.

As shown in FIG. 7, the fixing grooves 141 are formed at both front sides of the support member 140 to insert the fixing protrusions 113.

Since the support member 140 is formed to be smaller than the inner area of the housings 110 and 111 in order to be easily inserted into and coupled to the housings 110 and 111, the support member 140 may be formed within the housings 110 and 111. As described above, the fixing protrusion 113 supporting the outside of the support member 140 is formed on the inner surface of the housing body 111 to prevent the flow in the front and rear directions.

In addition, the support member 140 may be formed on the outside of the support member 140 to prevent the support member 140 from flowing from side to side by forming a fixing groove 141 into which the fixing protrusion 113 is inserted.

In the present embodiment, the fixing groove 141 is formed only in front of the support member 140 as shown in FIG. 7, but may also be formed in the rear in which the power socket 131 is mounted.

And the mounting portion 142 is formed on the upper portion of the support member 140.

The seating part 142 is formed in a quadrangular shape as shown in FIG. 5 and four are disposed at the same angle about the center of the support member 140, and the lower portion of the magnetic force part 150 is inserted.

The magnetic force 150 is disposed around the plate 120.

That is, as shown in FIG. 5, four magnetic force parts 150 are disposed between the mounting parts 121 formed on the plate 120.

As shown in FIG. 8, the magnetic force unit 150 includes a first magnet 151, a second magnet 152, and a yoke 153.

The first magnet 151 is polarized in the vertical direction.

The second magnet 152 is disposed adjacent to the first magnet 151, and is polarized in the opposite direction to the first magnet 151.

The yoke 153 is mounted below the first magnet 151 and the second magnet 152 to induce the flow of the magnetic field generated in the first magnet 151 and the second magnet 152.

As described above, the magnetic force unit 150 has the yoke 153 mounted to the first magnet 151 and the second magnet 152 polarized in opposite directions, so that the first magnet 151 and the second magnet 152 are mounted. By inducing the flow of the magnetic field generated in the), by increasing the magnetic force acting on the magnetic body 215 mounted on the charging case 200 to be described later can increase the adhesion of the charger 100 and the charging case 200.

The yoke 153 is provided with protrusions 154 protruding to both sides.

The magnetic force portion 150 has a lower portion is inserted into the seating portion 142, respectively.

That is, the yoke 153 is inserted into the seating portion 142.

The magnetic force part 150 is inserted into the insertion part 112.

As shown in FIG. 9, the protrusion 154 is in contact with a lower end of the insertion part 112 such that the magnetic force part 150 is fixed between the housings 110 and 111 and the support member 140.

Specifically, the first magnet 151 and the second magnet 152 is fixedly mounted to the yoke 153, the upper end and the insertion portion 112 of the protrusion 154 protruding on both sides of the yoke 153. ) And the yoke 153 is fixed between the housing body 111 and the support member 140 to fix the magnetic force part 150 to the inside of the charger 100.

As described above, the magnetic force part 150 is inserted into the seating part 142 and the insertion part 112 formed inside the housings 110 and 111, so that the magnetic force part 150 is not bonded. It can be easily fixed between the housing (110, 111) and the support member 140.

In addition, the insertion part 112 may cover the first magnet 151 and the second magnet 152 to prevent the first magnet 151 and the second magnet 152 from shaking.

9 is a cross-sectional view of a state in which the charging case 200 in which the mobile terminal 300 is coupled to the upper portion of the charger 100 is attached, and the magnetic material 215 is disposed on the magnetic force portion 150. The charger 100 and the charging case 200 are attached by the magnetic force of the magnetic force unit 150 and the magnetic body 215.

Meanwhile, the magnetic force unit 150 may not be included as a component of the charger 100, but as described above, the magnetic force unit 150 includes the magnetic force unit 150 as a component to charge with the charger 100. By increasing the adhesion of the case 200, the charging case 200 can be easily and strongly attached to the charger 100.

As shown in FIG. 3, the charging case 200 is provided with a coupling part 221 to which the mobile terminal 300 is coupled, and is attached to an upper portion of the charger 100 when the mobile terminal 300 is charged.

The charging case 200 is composed of a lower case 210, an upper case 220, a connector cover 230.

The upper case 220 is mounted on an upper portion of the lower case 210, and a coupling groove 211 is formed on the inner surface of the lower case 210 in the longitudinal direction as shown in FIG. 10.

The lower case 210 is equipped with a charging circuit module 212.

The faucet coil 213 is mounted on one end of the charging circuit module 212, and the connector 214 is mounted on the other end.

The power receiving coil 213 is magnetically coupled with the power transmission coil 123 to generate induction electromotive force as described above, and the charging circuit module 212 generates the induction electromotive force generated by the power receiving coil 213. The DC voltage is converted to the connector 214 and transferred to the connector 214.

The connector 214 mounted at the other end of the charging circuit protrudes in the direction of the coupling part 221 and is inserted into the portable terminal 300 coupled to the coupling part 221.

In addition, the lower case 210 is mounted with a magnetic material 215 for attaching the charging case 200 to the upper portions of the housings 110 and 111 by the magnetic force of the magnetic force part 150.

As such, by increasing the adhesion between the charger 100 and the charging case 200 by the magnetic force generated between the magnetic force unit 150 and the magnetic body 215, the charging case 200 can be easily attached to the charger 100. Can be.

The upper case 220 is mounted on the upper portion of the lower case 210, the coupling portion 221 is formed on the upper.

Accordingly, both sides of the portable terminal 300 are inserted into the coupling groove 211 and slide-coupled from one end of the coupling part 221 to the other end in the charging case 200.

As described above, the connector 214 is inserted into the portable terminal 300 coupled to the coupling unit 221 to charge the portable terminal 300.

The connector cover 230 is mounted on an upper portion of the lower case 210 and disposed at the other end of the upper case 220 to cover the connector 214.

As described above, the wireless charging device for a portable terminal attaches a charging cover coupled to the portable terminal 300 to an upper portion of the charger 100, and then to the power transmission coil 123 by the power transmission circuit module 130. A current is applied to magnetically couple the power transmission coil 123 and the power receiving coil 213.

The power receiving coil 213 magnetically coupled to the power transmission coil 123 generates induction electromotive force, and the induction electromotive force is converted into a DC voltage by the charging circuit module 212 through the connector 214. It is supplied to the mobile terminal 300.

As such, by wirelessly charging the mobile terminal 300 by using the charging case 200 and the charger 100 to which the mobile terminal 300 is coupled, the portable terminal 300 can be conveniently carried without having to separately remove the battery. The terminal 300 may be charged.

The wireless charging device for a mobile terminal of the present invention is not limited to the above-described embodiment, and can be variously modified and implemented within the range to which the technical idea of the present invention is permitted.

100: charger, 110: base, 111: housing body, 112: insertion portion, 113: fixing protrusion, 120: plate, 121: mounting portion, 122: core, 123: power transmission coil, 130: power transmission circuit module, 131: power socket , 140: support member, 141: fixing groove, 142: seating portion, 150: magnetic portion, 151: first magnet, 152: second magnet, 153: yoke, 154: protrusion, 200: charging case, 210: lower case , 211: coupling groove, 212: charging circuit module, 213: faucet coil, 214: connector, 215: magnetic material, 220: upper case, 221: coupling part, 230: connector cover, 300: portable terminal,

Claims (6)

A charger having a transmission coil mounted therein;
The receiving coil is magnetically coupled with the power transmission coil to generate an induction electromotive force, and is made of a charging case for charging the portable terminal.
The charger,
A housing in which the charging case is disposed above;
A plate mounted inside the housing and protruding to form a core in an upward direction in which the charging case is disposed so that the power transmission coil is wound around the core;
A power transmission circuit module connected to an external power source to apply current to the power transmission coil;
Is coupled to the inside of the housing, the plate is mounted on the top to support the plate upwards, the wireless charging device for a portable terminal, characterized in that consisting of a support member for mounting the power transmission circuit module in the lower portion. The method of claim 1,
The charger further comprises a magnetic portion disposed around the plate,
The charging case is equipped with a magnetic material to attach the charging case to the upper portion of the housing by the magnetic force of the magnetic portion,
The magnetic portion,
A first magnet polarized in a vertical direction;
A second magnet polarized in a direction opposite to the first magnet;
The wireless charging device for a portable terminal, characterized in that the yoke is mounted to the lower portion of the first magnet and the second magnet to induce the flow of the magnetic field generated in the first magnet and the second magnet. The method of claim 2,
The upper portion of the support member is provided with a seating portion is inserted into the lower portion of the magnetic force portion,
The inner side of the housing protrudes in a downward direction, the wireless charging device for a portable terminal, characterized in that the insertion portion is formed into which the magnetic force portion is inserted. The method of claim 3, wherein
The yoke is provided with protrusions protruding to both sides,
The insertion unit has a lower end of the wireless charging device for a mobile terminal, characterized in that by pressing the upper end of the protrusion to secure the magnetic force between the housing and the support member. The method of claim 1,
Fixing protrusions protrude in the up and down direction on the inner surface of the housing,
Wireless charging device for a mobile terminal, characterized in that the fixing groove is formed in the outer side of the support member is inserted into the fixing projections. The method of claim 1,
The charging case is provided with a coupling part to which the portable terminal is coupled, and a connector protruding toward the coupling part is mounted.
Inside the charging case is equipped with a charging circuit module for converting the induced electromotive force generated from the faucet coil to a DC voltage to transfer to the connector,
The connector is inserted into the portable terminal coupled to the coupling portion is a wireless charging device for a portable terminal, characterized in that the portable terminal is charged.

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