KR102159471B1 - Hand grip for extending wireless charging range and wireless charging system including the same - Google Patents

Abstract

The present invention relates to a hand grip for extending a wireless charging range and a wireless charging system including the same. The hand grip comprises a lower plate unit attached to one surface of a user terminal or a case, and a lower coil and an upper coil respectively positioned inside an upper plate unit opposite to the lower plate unit, and comprises a connection line positioned inside a connection unit connecting the lower plate unit and the upper plate unit. The lower coil, the upper coil, and the connection line are electrically connected to extend the wireless charging range, thereby enabling wireless charging of the user terminal even when the hand grip is attached.

Description

Hand grip for extending wireless charging range and wireless charging system including the same}

The present invention relates to a hand grip, which is a kind of accessory that is attached to a user terminal such as a mobile phone. In particular, it is attached to a user terminal or one side of its case to enable easy gripping of the user terminal, The present invention relates to a hand grip for a user terminal capable of extending a wireless charging distance, and a wireless charging system including the same.

Recently, user terminals such as smart phones and mobile phones have a tendency to increase their display size in order to provide high-quality images. This leads to an increase in the size of the user terminal, making it inconvenient for the user to handle the terminal with one hand and the risk of dropping it from the hand.

Therefore, various types of hand grips are used as accessories that enable safe and convenient gripping of a user terminal. These hand grips include finger rings, pop sockets, and grip bands according to their shape, and are generally attached to the back of a user terminal to enable easy and safe gripping.

Meanwhile, recent user terminals are equipped with a wireless charging function, and wireless charging methods include a magnetic induction method, a magnetic resonance method, and a microwave method. Among them, the magnetic resonance method can transmit wireless power of about 1 to 2m, and the microwave method can transmit wireless power over a long distance, but the magnetic induction method, which is currently most commonly used, can transmit wireless power only within a few cm.

Therefore, as described above, when the user terminal attaches an accessory such as a hand grip, in the case of magnetic induction wireless charging, the distance between the wireless charger and the user terminal increases, so that reliable charging cannot be guaranteed. .

In order to solve the above problem, according to the related art Patent Publication No. 10-2019-0043045 (Patent Document 1), a wireless charging module is installed inside a case in which a mobile terminal is mounted, and an accessory or wireless charging device is provided on the upper part of the case. By providing a wireless charging device having a receiving groove into which a module is inserted, a method for effectively charging a portable terminal wirelessly without removing the accessory attached to the rear of the mobile phone is proposed.

However, the above-described conventional method solves the problem by remodeling the wireless charging device, and it is difficult to apply to all accessories of various sizes and various shapes, and there is a problem that the existing wireless charging device cannot be used as it is.

Therefore, there is a need to develop a new hand grip accessory that enables convenient and safe gripping of the user terminal without interfering with the wireless charging function of the user terminal.

Korean Patent Publication No. 10-2019-0043045

The present invention is to solve the problem of wireless charging due to the hand grip in the conventional user terminal described above, and an object of the present invention is to include a function capable of extending the wireless charging distance in the hand grip, and the hand grip is attached. It is an object to provide a hand grip for a user terminal that enables wireless charging of a user terminal even in a state, and a wireless charging system including the same.

In order to solve the above technical problem, the hand grip for a user terminal according to the present invention comprises: a lower plate attached to the user terminal or one surface of the case; An upper plate portion facing the lower plate portion; A connection portion formed to have a thickness smaller than that of the lower plate portion and the upper plate portion to connect the lower plate portion and the upper plate portion, and to be fitted between fingers; A lower coil positioned inside the lower plate; An upper coil positioned inside the upper plate; And a connection line located inside the connection part. The lower coil, the upper coil, and the connection line are electrically connected to extend the wireless charging distance.

The connection part is formed to be expandable and contracted in a multi-stage shape to adjust the distance between the lower plate part and the upper plate part, and the connection line is formed of a flexible material so that it can be stretched and contracted in correspondence with the expansion and contraction of the connection part, or It is preferably formed in the form of a spring having.

The lower coil, upper coil, and connection line may be integrally formed as a single line. Alternatively, the connection line and any one of the lower coil and upper coil may be connected by a separate connector.

The hand grip of the present invention described above may further include a matching part inserted into the connection line to adjust an impedance between the lower coil and the upper coil.

The lower coil and the upper coil are preferably formed by winding a conductive metal wire or forming a printed circuit pattern.

On the other hand, the wireless charging system according to the present invention, a wireless charger including a wireless power transmission module for generating a power signal and transmitting wirelessly; A user terminal including a wireless power receiving module for receiving a power signal transmitted from the wireless power transmitting module; And a hand grip attached to the user terminal and wirelessly relaying a power signal between the wireless power transmission module and the wireless power reception module.

According to the hand grip for a user terminal of the present invention and a wireless charging system including the same, the following effects can be expected.

First, by installing a coil that relays wireless charging in the hand grip attached to the user terminal, the wireless charging distance is extended to enable wireless charging of the user terminal even when the hand grip is attached.

Second, since the coil that relays wireless charging in response to the stretching operation of the hand grip can also be stretched, the unique operation of the hand grip is not disturbed by the wireless relay coil built into the hand grip.

Third, it is possible to further increase the transmission efficiency and transmission distance of the wireless power signal by inserting and installing a matching unit for adjusting the impedance between the lower coil and the upper coil relaying wireless charging.

1 is a perspective view showing the appearance of a hand grip according to an embodiment of the present invention.
2 is an exploded perspective view of a hand grip according to an embodiment of the present invention.
3 shows a connection structure of a lower coil, an upper coil, and a connection line of a hand grip according to an embodiment of the present invention.
4 is a perspective view showing a coil shape in which a connection line is in the form of a spring in a hand grip according to an embodiment of the present invention.
5 is a cross-sectional view illustrating a shape in which a connection line is connected to a coil through a connector in a hand grip according to an embodiment of the present invention.
6 is a perspective view illustrating a shape in which a connection line is connected to a coil through a connector in a hand grip according to an embodiment of the present invention.
7 schematically shows the concept of a wireless charging system according to an embodiment of the present invention.
8 shows a functional block diagram of a wireless charging system according to an embodiment of the present invention.
9 is a functional block diagram of a hand grip according to an embodiment of the present invention in which a matching part is installed in a connection line.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In addition, parts irrelevant to the description are omitted in the drawings in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated.

1 is a perspective view showing an outer shape of a hand grip according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof.

1 and 2, the hand grip 100 of the present invention has a lower plate part 110 attached to one surface of a user terminal or its case, and has a shape similar to that of the lower plate part 110. It includes an upper plate portion 120 installed opposite to and a connection portion 130 connecting between the lower plate portion 110 and the upper plate portion 120.

The connection portion 130 is formed to have a thickness smaller than that of the lower plate portion 110 and the upper plate portion 120 and is formed to be easily fitted between fingers, so that the user can easily grip the hand grip 100.

In addition, the connection portion 130 may be folded in a multi-stage shape to be stretchable, and when the connection portion 130 is formed to be stretchable as described above, the distance between the lower plate portion 110 and the upper plate portion 120 can be adjusted. If the hand grip 100 is not used, its size can be minimized.

Meanwhile, in order to extend the wireless charging distance by relaying wireless charging, the hand grip of the present invention includes a lower coil 210 located inside the lower plate part 110, and an upper coil located inside the upper plate part 120 ( 220), and a connection line 230 positioned inside the connection unit 130. In addition, a shielding pad 240 may be further provided to ensure electrical shielding of the lower coil 210 and the upper coil 220.

The lower coil 210, the upper coil 220, and the connection line 230 are electrically connected to form one closed loop, which is shown in FIG. 3.

In the embodiment of the present invention, the lower coil 210 and the upper coil 220 were formed by winding a conductive metal wire, and an enameled copper wire coated with an enamel insulator on the outer surface was used as the metal wire. However, in addition to the enameled copper wire, the metal wire may be formed of a material having high conductivity such as a copper alloy or gold or silver. In addition, instead of winding the metal wire, the lower coil 210 and the upper coil 220 may be formed by forming a winding-type printed circuit pattern on the substrate.

In addition, the lower coil 210 and the upper coil 220 are formed by winding circularly in FIGS. 1 to 3, but are not limited thereto, and may be formed in other shapes such as a square, etc. 110) and the shape of the upper plate 120 may be a specific shape.

On the other hand, as described above, when the connection part 130 is formed to be stretchable, the connection line 230 must also be stretchable in response thereto. To this end, the connection line 230 is preferably formed of a flexible material that can be stretched or formed in the form of a spring having elasticity. 4 shows an example of a connection line 230 formed in the form of a spring.

In addition, it is preferable that the lower coil 210, the upper coil 220, and the connection line 230 are integrally formed as a single line in that electrical resistance can be minimized. 2 and 4 illustrate an example in which the lower coil 210, the upper coil 220, and the connection line 230 are formed as a single line.

However, the shape of the lower coil 210, the upper coil 220, and the connection line 230 of the above-described shape is advantageous in terms of electrical resistance, but the assembling property with the lower plate part 110, the upper plate part 120 and the connection part 130 This falls. That is, in order to form the lower coil 210, the upper coil 220, and the connection line 230 as a single line, the housing portions 110, 120, 130 and the coil portions 210, 220 of the hand grip 100 230) must be manufactured at the same time, so the manufacturing process is complicated and the manufacturing time is high.

Therefore, in order to more easily manufacture the hand grip, one of the lower coil 210 and the upper coil 220 and the connection line 230 may be connected with a separate connector. In FIG. 5, an example in which the lower coil 210 and the connection line 230 are connected to the connector 250 is shown in a cross-sectional view, and in FIG. 6, coil portions 210, 220, and 230 including the connector 250 are shown in a perspective view. Indicated. In FIGS. 5 and 6, a pogo pin is used as the connector 250, but the present invention is not limited thereto, and other types of connectors may be used.

The hand grip 100 according to the embodiment of the present invention formed as described above is attached to one surface of the user terminal 300, so that the user terminal 300 can be easily gripped, and in addition, the distance of wireless charging is extended. I can make it.

Hereinafter, a wireless charging system including the hand grip 100, the user terminal 300 and the wireless charger 400 according to the present invention will be described. FIG. 7 schematically shows a conceptual diagram of the wireless charging system of the present invention, and FIG. 8 shows its function as a block diagram.

7 and 8, the wireless charging system of the present invention includes a wireless charger 400 including a wireless power transmission module 410, a user terminal 300 including a wireless power receiving module 310, the It is configured to include a hand grip 100 for wirelessly relaying a power signal between the wireless power transmission module 410 and the wireless power receiving module 310.

The wireless power transmission module 410 includes a power supply circuit and a transmission coil, and the wireless power reception module 310 includes a reception coil and a charging circuit. The transmission coil of the wireless power transmission module 410 and the reception coil of the wireless power reception module 310 are magnetically inductively coupled to deliver power.

The upper coil 220 and the lower coil 210 of the hand grip 100 are inserted between the wireless power transmission module 410 and the wireless power reception module 310 to transmit a power signal. That is, the transmission coil of the wireless power transmission module 410 and the upper coil 220 are inductively coupled to transmit power wirelessly, and the transmitted power is transmitted to the lower coil 210 through the connection line 230, and the lower coil Power is supplied to the user terminal 300 wirelessly by inductive coupling 210 and the receiving coil of the wireless power receiving module 310.

On the other hand, as shown in FIG. 9, a matching part 260 is inserted and installed in the connection line 230 of the hand grip 100, so that the impedance between the upper coil 220 and the lower coil 210 can be adjusted. have. The matching unit 260 can increase transmission efficiency and transmission distance by minimizing the reactance component of the impedance. The matching unit 260 may be implemented as a circuit using a variable capacitor or an inductor.

As described above, the hand grip of the present invention and the wireless charging system including the same can be optimally applied to a portable user terminal such as a smart phone, but are not limited thereto, and various technical fields for relaying and expanding the wireless charging function It will be able to be properly applied to.

Although the present invention has been described with reference to the above-described preferred embodiments and the accompanying drawings, different embodiments may be configured within the spirit and scope of the present invention. Accordingly, the scope of the present invention is defined by the appended claims, and should be construed as not limited by the specific embodiments described herein.

100 hand grip
110 Bottom
120 top
130 connection
210 bottom coil
220 top coil
230 connecting wire
240 shielding pad
250 connector
260 matching
300 user terminals
310 wireless power receiving module
400 wireless charger
410 wireless power transmission module

Claims (7)

A lower plate attached to one surface of the user terminal or the case;
An upper plate portion facing the lower plate portion;
A connection portion formed to have a thickness smaller than that of the lower plate portion and the upper plate portion to connect the lower plate portion and the upper plate portion, and to be fitted between fingers;
A lower coil positioned inside the lower plate;
An upper coil positioned inside the upper plate; And
It is made including a connection line located inside the connection part,
The lower coil, the upper coil and the connection line are electrically connected to extend the wireless charging distance. The method of claim 1,
The connection portion is formed to be expandable and contracted in a multi-stage shape to adjust the distance between the lower plate portion and the upper plate portion,
The connection line is a hand grip, characterized in that formed in the form of a flexible material or a spring having elasticity so that it can be stretched in correspondence with the expansion and contraction of the connection part. The method of claim 1,
The hand grip, characterized in that the lower coil, the upper coil and the connection line are integrally formed as a single line. The method of claim 1,
The hand grip, characterized in that the connection line and any one of the lower coil and upper coil is connected by a connector. The method of claim 1,
The hand grip, characterized in that it is inserted into the connection line, further comprising a matching portion for adjusting the impedance between the lower coil and the upper coil. The method of claim 1,
The lower coil and the upper coil are hand grips, characterized in that winding a conductive metal wire or forming a printed circuit pattern. A wireless charger including a wireless power transmission module generating and transmitting a power signal wirelessly;
A user terminal including a wireless power receiving module for receiving a power signal transmitted from the wireless power transmitting module; And
A wireless device comprising the hand grip according to any one of claims 1 to 5, which is attached to the user terminal and wirelessly relays a power signal between the wireless power transmission module and the wireless power reception module. Charging system.

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