KR102126135B1 - Wireless charger for a terminal - Google Patents

Abstract

A wireless charger for charging a terminal having a receiving coil provided therein and a fastening plate attached to an outer surface, a wireless charging unit having a transmitting coil therein corresponding to the receiving coil so as to charge the terminal, the wireless charging unit Covering the upper portion of the terminal mounting portion is formed with a guide groove on the outer surface facing the fastening plate so that the fastening plate can be fastened in a sliding manner, covering the lower surface of the wireless charging unit, the wireless with the terminal mounting portion It includes a cover portion sealing the charging portion and a power connection portion electrically connected to the transmission coil to apply a voltage to the transmission coil. Thus, the terminal can be charged by being mounted on a wireless charger.

Description

Wireless charger {WIRELESS CHARGER FOR A TERMINAL}

The present invention relates to a wireless charger for a terminal, and more particularly, to a wireless charger for a terminal that can be charged while a terminal such as a portable device is mounted.

With the recent development of information and communication technology, the use of smartphones capable of not only voice calls but also the Internet is becoming more common, and various smartphones with better performance are continuously developed and released. In particular, the latest smartphones are equipped with large-capacity batteries due to the rapid increase in battery consumption through the installation of a large screen and an improved central processing unit.

For the efficiency and convenience of charging for the battery, smart phones supporting wireless charging are rapidly increasing. Most wireless charging methods of recently launched smart phones are electromagnetic induction. According to the electromagnetic induction method, the receiving coil formed on the smart tone and the transmitting coil formed on the wireless charger may be provided to face each other. At this time, an induced current is generated between the receiving coils and the transmitting coils disposed adjacent to each other. Thereby, the battery can be charged. At this time, the principle of generating an induction current according to the number of windings of the receiving coil and the transmitting coil and the distance between the receiving coil and the receiving coil is used.

According to many recently released wireless chargers for vehicles (Refer to Korean Patent Nos. 1790891 or 1529469), the wireless charger is equipped with a magnetic induction device and a charging unit for mounting and a magnetic induction device, so that a smart phone is attached by itself. It includes an attachment portion provided with a magnetic sticker or a metal plate.

However, in the case of such a wireless charging cradle, several important problems are drawn.

First, it is the efficiency of wireless charging. One of the most important factors in determining charging efficiency in wireless charging is the correct alignment of the transmitting coil (Tx) and the receiving coil (Rx). When the central axis of the concentric circle of the transmitting coil (Tx) of the charger and the central axis of the concentric circle of the receiving coil (Rx) of the smartphone are exactly matched, the charging efficiency of the charger is exhibited 100%. Is reduced.

Second, the use of magnets. In most cases, strong neodymium magnets are used for convenience in mounting and attachment. However, these powerful neodymium magnets seriously affect the digital compass inside the smartphone, the auto focus of the camera, and the optical image stabilization (OIS) function. If the smartphone is exposed to a strong neodymium magnet for a long time, malfunctions of the corresponding functions may occur due to magnetic effects such as magnetization of the components inside the smartphone.

The present invention provides a wireless charger that can be charged while the portable device is physically mounted.

According to embodiments of the present invention, a wireless charger for charging a terminal having a receiving coil provided therein and a fastening plate attached to an outer surface, transmits therein corresponding to the receiving coil so as to charge the terminal Wireless charging unit having a coil, covering the upper portion of the wireless charging unit, the terminal mounting portion is formed with a guide groove so that the fastening plate can be fastened in a sliding manner on an outer surface facing the fastening plate, covering the lower surface of the wireless charging unit , A cover part sealing the wireless charging part together with the terminal mounting part, and a power connection part electrically connected to the transmitting coil and applying a voltage to the transmitting coil.

In one embodiment of the present invention, the guide groove may include an upper groove having a horizontal width narrowing toward the lower portion and a lower groove having a horizontal width of a predetermined size connected to the upper groove.

Here, the upper groove may be formed to have a deeper depth toward the upper end.

In one embodiment of the present invention, the fastening plate includes inversely inclined sidewalls, and the guide groove may have a width that increases toward the inside so as to slide along the inclined sidewalls.

In one embodiment of the present invention, the bottom surface of the guide groove may include a groove extending in a vertical direction.

In one embodiment of the present invention, an attachment portion connected to the cover portion and attaching the cover portion to a specific location may be additionally provided.

Here, the attachment portion, the attachment stopper that is fastened by a screw method to the hollow connection portion formed in the cover portion, is provided on one end of the ball head portion and the ball head portion rotatably fastened inside the hollow, attached to the outside It may include a plate.

In one embodiment of the present invention, a fastening groove formed in a vertical direction is formed at the center of the fastening plate, and a ring portion is provided to slide along the fastening groove, and the guide groove is slidably provided along the fastening groove Guide projections can be formed.

The wireless charger according to the embodiments of the present invention covers a wireless charging unit having a transmitting coil therein and an upper portion of the wireless charging unit corresponding to a receiving coil so as to charge the terminal, and an outer surface facing the fastening plate. It includes a terminal holder having a guide groove formed so that the fastening plate can be fastened in a sliding manner. Accordingly, as the terminal can be physically mounted on the terminal mounting portion, alignment between the receiving coil and the transmitting coil can be effectively achieved.

In addition, as the terminal is mounted on the terminal mounting portion using a sliding method instead of the conventional magnet method, a magnetic effect on a device included in the terminal can be suppressed.

1 is a perspective view for explaining a wireless charger according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view illustrating the wireless charger of FIG. 1.
3 is a cross-sectional view for describing a state after coupling between the wireless charger and the mobile phone of FIG. 1.
4 is a perspective view showing a state before coupling between the wireless charger and the mobile phone of FIG.
5 is a perspective view showing a state after the connection between the wireless charger and the mobile phone of FIG.
FIG. 6 is a cross-sectional view for describing an alignment state between the transmitting coil of the wireless charger of FIG. 1 and the receiving coil of the mobile phone.
7 is a perspective view for explaining a wireless charger according to another embodiment of the present invention.
8 is a perspective view illustrating a fastening plate portion that can be fastened to the guide groove of FIG. 7.
9 is a cross-sectional view for describing a state after coupling between the wireless charger and the mobile phone of FIG. 7.

Hereinafter, a wireless charger according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention can be applied to various changes and may have various forms, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosure form, and it should be understood that it includes all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals are used for similar components. In the accompanying drawings, the dimensions of the structures are shown to be enlarged than the actual for clarity of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from other components. For example, the first component may be referred to as a second component without departing from the scope of the present invention, and similarly, the second component may be referred to as a first component.

Terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as “include” or “have” are intended to indicate the presence of features, numbers, steps, actions, elements, parts or combinations thereof described in the specification, but one or more other features. It should be understood that the presence or addition possibilities of fields or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms, such as those defined in a commonly used dictionary, should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

1 is a perspective view for explaining a wireless charger according to an embodiment of the present invention. FIG. 2 is an exploded perspective view illustrating the wireless charger of FIG. 1. 3 is a cross-sectional view for describing a state after coupling between the wireless charger and the mobile phone of FIG. 1.

1 to 3, the wireless charger 100 according to an embodiment of the present invention includes a wireless charging unit 110, a terminal mounting unit 130, a cover unit 150, and a power connection unit 170. . The wireless charger 100 may be used to charge the terminal 10 having the receiving coil 11 provided therein and the fastening plate 12 attached to the outer surface. Therefore, the wireless charger 100 can not only wirelessly charge the terminal 10 in an electromagnetic induction method, but also mount the terminal 10.

The fastening plate 12 may have, for example, an oval plate or a polygonal plate shape.

The fastening plate 12 may be attached to the outer surface of the terminal 10 or the outer surface of the case covering the terminal 10. Examples of the terminal 10 include a mobile phone, a PMP, an MP3 player, an electronic dictionary, and a tablet PC.

The wireless charging unit 110 includes a transmission coil 111 therein. The transmitting coil 111 may correspond to the receiving coil 11 formed inside the terminal 10. The number of windings of the transmitting coil 111 and the separation distance from the receiving coil 11 may be adjusted according to the charging speed and charging capacity.

The wireless charging unit 110 includes a heat sink 113 and a circuit board 115 in addition to the transmitting coil 111. The circuit board 115 is provided with a transistor, a resistor, and the like. Thus, the circuit board 115 can suppress leakage current and transient current.

The heat sink 113 is interposed between the circuit board 115 and the transmitting coil 100. Accordingly, the insulating layer 113 can effectively release heat generated from the circuit board 115 and the transmitting coil 100.

The terminal holder 130 is provided to cover the upper portion of the wireless charging unit 110. The terminal holder 130 provides an accommodation space accommodating the wireless charging unit 110 together with the cover unit 160.

The terminal mounting portion 130 is formed with a guide groove 135 on an outer surface facing the upper fastening plate 12. The guide groove 135 may have a size corresponding to the fastening plate 12. The guide groove 135 may have a shape corresponding to the shape of the fastening plate 12. For example, when the fastening plate 12 has a square plate shape or an oval plate shape, the guide groove 135 has a square groove shape or an elliptical groove shape having substantially the same size as the fastening plate 12. Can have

Accordingly, the fastening plate 12 may be coupled to the terminal holder 130 in a sliding manner along the guide groove 135. That is, when the upper portion of the guide groove 135 is opened, the fastening plate 12 may be sliding downward from the upper portion of the opened guide groove 130 to be coupled to the terminal holder 130.

The cover unit 150 is provided to cover the lower surface of the wireless charging unit 110. The cover part 150 is fastened to the outer peripheral part of the terminal mounting part 130. Accordingly, the wireless charging unit 110 may be sealed together with the terminal holder 130.

The power connection unit 170 is electrically connected to the transmission coil 111. The power connection unit 170 may apply a voltage to the transmission coil 111. The power connection unit 130 may include, for example, a power cable and a power connector.

According to embodiments of the present invention, the terminal 10 may be physically mounted on the wireless charger 100 as the fastening plate 12 is slidingly coupled within the guide groove 135. As a result, the receiving coil 11 of the terminal 10 and the transmitting coil 111 of the wireless charger 100 are mounted as the terminal 10 is mounted in the wireless charger 100 in a sliding manner instead of a conventional mounting method using a magnet. It can be more precisely aligned. Accordingly, the wireless charger 100 can secure better charging efficiency.

Furthermore, as the wireless charger 100 mounts the terminal 10 in a sliding manner instead of a conventional mounting method using a magnet, the magnetic shock caused by the magnet is suppressed on parts provided inside the terminal 10. can do.

In one embodiment of the present invention, the guide groove 135 includes an upper groove 131 and a lower groove 133. The upper groove 131 has a horizontal width that narrows toward the bottom. On the other hand, the lower groove 133 is connected to the upper groove 131 and has a horizontal width of a certain size. Accordingly, when the fastening plate 20 is drawn into the guide groove 135 from the top to the bottom, it can be easily inserted along the sidewall defining the upper groove 131, and the fastening plate 20 ) Is inserted into the guide groove 135, and the lower groove 133 can firmly fix the fastening plate 20.

Meanwhile, the upper groove 131 may have a depth deeper toward the upper end. Accordingly, when the fastening plate 20 is drawn into the guide groove 135 from the top to the bottom, it can be easily inserted along the upper sidewall defining the upper groove 131 more easily.

In one embodiment of the invention, the fastening plate 20 includes inclined sidewalls. That is, since both side walls of the fastening plate 20 are inclined toward the terminal 10, the fastening plate 20 may have a width narrowing toward the terminal 10.

In this case, the guide groove 135 may have a width that increases toward the inside so as to slide along the inclined side. Thus, the fastening plate 20 can be securely fixed in the guide groove 135.

In one embodiment of the present invention, at least one groove 136 (see FIG. 1) extending in a vertical direction may be formed on the bottom surface of the guide groove 135. The grooves 136 may be arranged in the vertical direction. Accordingly, scratches that may occur in the fastening plate 20 when the fastening plate 20 is inserted or released into the guide groove 135 a plurality of times can be suppressed.

The wireless charger 100 according to an embodiment of the present invention is connected to the cover portion 150 and further includes an attachment portion 160 for attaching the cover portion 150 to a specific location. Accordingly, the attachment unit 190 can fix the terminal 10 in a specific position.

Referring back to FIG. 3, the cover part 150 may be formed with a connection part 151 provided with a hollow. The attachment portion 160 includes an attachment stopper 161, a ball head portion 163, and an attachment plate 165.

The attachment stopper 161 is fastened to the connection portion 159 with a hollow formed in the cover portion 150 by a screw method. At this time, the ball of the ball head portion 163 may be accommodated in the hollow.

The attachment stopper 161 is fastened to the connection portion 151 by a screw method. Thus, the ball head portion 163 can be fixed to the connection portion 159 to be rotatable.

The ball head portion 163 is rotatably fastened to the cover portion 150 so that the ball head portion 163 is accommodated in the hollow. Accordingly, the terminal 10 fastened to the wireless charger 100 can be easily rotated.

The attachment plate 165 is connected to one end of the ball head portion 163. The attachment plate 165 may be attached to the external object. Accordingly, the wireless charger 100 is fixed to an external object.

Examples of the external object include a cradle, a plate, and a dashboard for a vehicle.

4 is a perspective view showing a state before coupling between the wireless charger and the mobile phone of FIG. 5 is a perspective view showing a state after the connection between the wireless charger and the mobile phone of FIG. FIG. 6 is a cross-sectional view for describing an alignment state between the transmitting coil of the wireless charger of FIG. 1 and the receiving coil of the mobile phone.

4 to 6, it can be confirmed that the mobile phone can be firmly mounted as an example of the wireless charger 100 and the terminal 10. Furthermore, it can be seen that the transmitting coil 111 of the wireless charger 100 and the receiving coil 11 of the terminal 10 are more precisely aligned with each other. Accordingly, the wireless charger 100 may have better charging efficiency.

7 is a perspective view for explaining a wireless charger according to another embodiment of the present invention. 8 is a perspective view illustrating a fastening plate that can be fastened to the guide groove of FIG. 7. 9 is a cross-sectional view for describing a state after coupling between the wireless charger and the mobile phone of FIG. 7.

7 to 9, the wireless charger 200 according to another embodiment of the present invention includes a wireless charging unit 210, a terminal mounting unit 230, a cover unit 250, and a power connection unit 270 do. The wireless charger 200 may be used to charge the terminal 20 having the receiving coil 21 provided therein and the fastening plate 22 attached to the outer surface.

Since the wireless charging unit 210, the cover unit 250, and the power connection unit 270 are the same as the components of the wireless charger described with reference to FIGS. 1 to 3, descriptions thereof will be omitted. Therefore, the description will be made focusing on the fastening plate 22 and the terminal mounting portion 230.

The fastening plate 22 is formed with a body 22a and a fastening groove 22b extending in a vertical direction at the center of the body.

The hook 30 may be slid in the fastening groove 22b. The ring portion 30 includes a connecting plate 31, a connecting portion 33 and a connecting ring 35.

A guide protrusion 237 slidably provided along the fastening groove 22b is formed in the guide groove 235. Thus, the guide protrusion 237 may be provided to be slidable with the ring portion 30 in the fastening groove 22b.

Although described above with reference to the preferred embodiments of the present invention, those skilled in the art may variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can.

10, 20: terminal 11: receiving coil
12, 22: fastening plate 100, 200: wireless charger for terminals
110, 210: wireless charging unit 130, 230: terminal mounting unit
131: upper groove 133: lower groove
135: guide groove 160, 260: attachment portion

Claims (8)

In the wireless charger for charging a terminal having a receiving coil provided inside and a fastening plate attached to the outer surface,
A wireless charging unit having a transmitting coil therein corresponding to the receiving coil so as to charge the terminal;
A terminal mounting portion covering the upper portion of the wireless charging unit and having a guide groove formed on the outer surface facing the fastening plate so that the fastening plate can be fastened in a sliding manner;
A cover portion covering a lower surface of the wireless charging unit and sealing the wireless charging unit together with the terminal mounting unit; And
It is electrically connected to the transmitting coil, and includes a power supply for applying a voltage to the transmitting coil,
The guide groove is formed on the outer surface of the terminal holder so that the center axis of the concentric circles of the receiving coil and the center axis of the concentric circles of the transmitting coil coincide, and the receiving coil and the transmitting coil can be aligned with each other.
In the center of the fastening plate, a fastening groove formed in a vertical direction is formed, and a ring portion is provided to slide along the fastening groove,
A wireless charger characterized in that the guide groove is formed with a guide protrusion slidably provided along the fastening groove. The wireless charger as claimed in claim 1, wherein the guide groove includes an upper groove having a horizontal width narrowing toward the lower portion and a lower groove connected to the upper groove and having a horizontal width of a predetermined size. The wireless charger as claimed in claim 2, wherein the upper groove is formed to have a depth deeper toward the upper end. The fastening plate of claim 1, wherein the fastening plate comprises inclined sidewalls,
The guide groove is a wireless charger, characterized in that it has a width that widens toward the inside so as to slide along the inclined side walls. The wireless charger according to claim 1, wherein the bottom surface of the guide groove includes a groove extending in a vertical direction. The wireless charger according to claim 1, further comprising an attachment part connected to the cover part and attaching the cover part to a specific position. According to claim 6, The attachment portion,
An attachment stopper fastened in a screw manner to the hollow connection portion formed in the cover portion;
A ball head part rotatably fastened inside the hollow; And
A wireless charger provided at one end of the ball head portion and comprising an attachment plate attached to the outside. delete

Images