KR20200018186A - Wireless charging device for portable terminal - Google Patents

Abstract

The present invention relates to a wireless charging device for a portable terminal. According to the present invention, the wireless charging device comprises: a terminal accessory fixed to a rear surface of a portable terminal and embedded with a transmission coil generating a magnetic field for wireless charging of a magnetic induction method; and a wireless charging module capable of being coupled with the terminal accessory and having a circuit unit for supplying alternating current (AC) power to the transmission coil. The terminal accessory and the wireless charging module are individually provided with a first ground terminal and a second ground terminal, and when the terminal accessory is coupled to the wireless charging module, the first and second ground terminals are in contact with each other so as to supply the AC power from the circuit unit to the transmission coil.

Description

WIRELESS CHARGING DEVICE FOR PORTABLE TERMINAL}

The present invention relates to a wireless charging device, and more particularly, to a wireless charging device having a structure that can be easily attached to a portable terminal such as a smart phone and can be used for wireless charging.

Various types of vehicle holders have been developed to facilitate the use of electronic devices including smartphones.

Recently, due to the development of smart phones, various functions such as car navigation, black boxes, etc. are integrated in smart phones, and thus, the necessity of a vehicle holder is increasing.

In general, the vehicle cradle is a structure that is attached to the other end of the vehicle by adsorbing the glass, dash board, etc. to the other end side after fitting the smartphone to one end side. However, the vehicle cradle has a problem that the vehicle cradle is easily separated from the attachment surface due to its complicated structure and high weight. In addition, when you want to use the smart phone while driving, there is a problem in that the use of the smart phone has to be released by pushing the state coupled to the side of the vehicle cradle.

Therefore, in recent years, a minimalist method of attaching a smart ring to the rear of a smartphone and fitting the smart ring to a vent of a vehicle has been popular.

Such a smart ring has an advantage of being easy to attach to the vehicle and easy to remove, but it is difficult to stably fix the smartphone to the vehicle because the smart ring is easily separated from the fixed position by vibration of the vehicle.

In addition, since the smart ring has a small ring shape attached to the rear of the smartphone, the position at which the smartphone can be fixed in the vehicle is limited, and thus, it is difficult to fix the smartphone at a distance position that fits the driver's field of view.

Meanwhile, in recent years, various methods and devices for wirelessly charging a portable terminal such as a smartphone have been developed, but wireless charging is not performed or charging efficiency rapidly when accessories such as a smart ring or a case are attached to the rear of the smartphone. There is a decreasing problem.

Patent Document 1: Registration Utility Model Publication No. 0428248 (registered on Dec. 14, 2005) Patent Document 2: Publication No. 2017-0053820 (published May 17, 2017)

SUMMARY OF THE INVENTION An object of the present invention is to provide a wireless charging device for a portable terminal which can be easily attached to a portable terminal and used to improve charging efficiency.

According to a feature of the present invention for achieving the above object, the present invention is fixed to the back of the portable terminal, a terminal accessory having a built-in transmission coil for generating a magnetic field for wireless charging of the magnetic induction; And a wireless charging module that can be combined with the terminal accessory and has a circuit unit for supplying AC power to the transmission coil.

The terminal accessory and the wireless charging module are provided with a first ground terminal and a second ground terminal, respectively, when the terminal accessory is coupled to the wireless charging module, the first and second ground terminals are in contact with each other to transmit from the circuit unit. AC power is supplied to the coil.

The circuit unit may be built in the wireless charging module, or at least a part of the circuit unit may be provided outside the wireless charging module to be connected to the wireless charging module through a cable.

The terminal accessory may further include a rear housing fixed to a rear surface of the portable terminal; And a front housing coupled to the rear housing to be rotatable.

The present invention has a built-in transmission coil in the accessory fixed to the back of the portable terminal so that the AC power is supplied through the ground terminal when combined with a wireless charging module provided with a circuit, the portable terminal using a magnetic field generated by the terminal accessory By charging, the wireless terminal can be effectively performed even in a state where an accessory such as a smart ring or a case is mounted on the portable terminal.

In addition, by forming a guide in the ground portion to which the terminal accessory and the wireless charging module are coupled so that the position of the ground terminal can be easily aligned when combined, and by accurately positioning the transmitting coil and the receiving coil of the portable terminal, The charging efficiency can be improved.

According to another embodiment of the present invention, it is easy to carry in a state in which the finger is placed in the mounting ring, the angle can be adjusted with a small force, the angle is adjusted to maintain the stable state, the magnet mounted on the vehicle Can also be attached to the compatibility effect is good.

According to still another embodiment of the present invention, a circuit unit for supplying AC power to the transmitting coil is provided outside the wireless charging module to be connected to the wireless charging module through a cable, thereby miniaturizing the wireless charging module and at the same time according to the magnetic field. Malfunction of the circuit can be prevented, and the terminal accessory can be rotated in a state fixed to the back of the portable terminal, thereby improving convenience of use.

1 is a perspective view showing an embodiment of the configuration of a cradle for a mobile terminal according to the present invention;
2 is a perspective view illustrating a state in which a mounting ring is rotated in a ring holder for a portable terminal.
3 is a front view showing a state in which the mounting ring is rotated in the ring holder for the portable terminal.
4 and 5 are cross-sectional views illustrating an embodiment of a cross-sectional configuration of a cradle for a mobile terminal according to the present invention.
6 is a view for explaining an embodiment of a method for mounting the mounting bracket for the portable terminal according to the present invention attached to the rear of the portable terminal.
7 is a view for explaining an embodiment of a method for attaching a cradle for a portable terminal according to the present invention to a vehicle cradle.
8 is a block diagram showing the overall configuration of a wireless charging system according to an embodiment of the present invention.
9 is a perspective view showing the configuration of a terminal accessory according to an embodiment of the present invention.
10 is a cross-sectional view illustrating a configuration of a terminal accessory according to an embodiment of the present invention.
11 is a perspective view showing the configuration of a wireless charging module according to an embodiment of the present invention.
12 is a view for explaining the configuration of the grounding unit provided in each of the terminal accessory and the wireless charging module.
13 is a block diagram illustrating an embodiment of a configuration of a circuit unit included in the wireless charging module.
14 is a perspective view illustrating a state in which a terminal accessory and a wireless charging module are coupled to each other;
15 is a view showing the configuration of a wireless charging module according to another embodiment of the present invention.
16 is a perspective view showing the overall configuration of a wireless charging system according to another embodiment of the present invention.
17 and 18 are views for explaining a detailed configuration of the terminal accessory shown in FIG.
19 is a perspective view for explaining a detailed configuration of the wireless charging module shown in FIG.
20 is a view for explaining the detailed configuration of the cable shown in FIG.

The following merely illustrates the principles of the invention. Therefore, those skilled in the art, although not explicitly described or illustrated herein, can embody the principles of the present invention and invent various devices that fall within the spirit and scope of the present invention. In addition, all conditional terms and embodiments listed herein are in principle clearly intended to be understood only for the purpose of understanding the concept of the invention and are not to be limited to the specifically listed embodiments and states. do.

In addition, it is to be understood that all detailed descriptions, including the specific embodiments, as well as the principles, aspects, and embodiments of the present invention, are intended to include structural and functional equivalents of these matters. In addition, these equivalents should be understood to include not only equivalents now known, but also equivalents to be developed in the future, that is, all devices invented to perform the same function regardless of structure.

The above objects, features, and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Figure 1 is a perspective view showing a cradle for a portable terminal according to the present invention, Figure 2 is a perspective view showing a state in which the mounting ring is rotated in the ring holder cradle according to the portable terminal for the present invention, Figure 3 It is shown a front view showing a state in which the mounting ring is rotated in the ring holder cradle according to the mobile terminal according to the present invention.

As shown in FIGS. 1 to 3, the holder for a portable terminal according to an embodiment of the present invention has a ring holder 10 and a ring shape, and one end of the holder is rotatably housed and rotated. It includes a mounting ring 20 that can adjust the angle of one state.

The ring holder 10 is a part attached to the rear of the portable terminal H while forming the body of the holder 1 for the portable terminal, and may be formed of various kinds of materials such as a metal material or a synthetic resin material. When the ring holder 10 is made of synthetic resin or the like, at least a portion of the ring holder 10 is made of a material that is attached by magnetic force to the attachment portion 101 of the holder 100 fixed to the vehicle.

The mobile terminal may correspond to a smart phone and various smart devices, but the present invention is not limited thereto.

The ring holder 10 is formed in a flat plate shape so as to be stable on the ground in a state where it is attached to the portable terminal. In addition, the circumferential surface of the ring holder 10 is formed in a curved surface and the front inner portion is formed to be open. The circumferential surface of the ring holder 10 may be formed to form a circular or polygonal.

In detail, the ring holder 10 includes an attachment surface 11, a mounting portion 13, and a rotation shaft portion 17.

The attachment surface 11 corresponds to the rear side of the ring holder 10 and is attached to the rear side of the mobile terminal H with an adhesive. The rear surface of the ring holder 10 forms an attachment surface 11 to which the rear surface of the ring holder 10 is attached. The adhesive may correspond to the adhesive film attached to the back of the ring holder 10, the adhesive film may be used that is excellent in the adhesion and removed without leaving a trace when detachable.

The mounting portion 13 corresponds to a front surface opposite to the attachment surface 11 from the ring holder 10 and is formed by recessing the remaining portion of the front surface except the edge. That is, the mounting portion 13 may be formed by opening the front inner portion except the edge.

The mounting ring 20 is rotatably housed in the mounting portion 13. The mounting part 13 is formed to have a space in which the mounting ring 20 can be stored in a horizontal state. The mounting ring 20 is accommodated in a horizontal state on the edge portion of the mounting portion 13. In the state in which the mounting ring 20 is accommodated in the mounting portion 13, the holder 1 for the mobile terminal forms a flat surface. This ensures a sense of stability if the mobile terminal is laid down while the mobile terminal holder 1 is attached to the rear of the mobile terminal.

As shown in FIG. 2, the mounting portion 13 includes an edge 14 at which the mounting ring 20 is received and a central circular holder portion 15 formed stepped downward from the edge 14. The holder part 15 is attached to the attachment portion 101 of the holder 100 which is fixed to the vehicle to be described later in a magnet type.

A magnet may be embedded in a position corresponding to the holder part 15 in the ring holder 10. However, the ring holder 10 is made of a metal material, the magnet is embedded only in the attachment portion 101 of the cradle 100 is fixed to the vehicle can be attached to the holder portion 15 by the magnetic force. .

The holder portion 15 is provided with an attachment portion 101 and a protrusion 15a for preventing flow after attachment by magnetic force. The protrusion 15a is coupled to the groove formed in the attachment portion 101. A plurality of protrusions 15a are arranged in a symmetrical shape so that the protrusions 15a can be attached regardless of the attachment portion 101 and the attachment direction. The protrusion 15a improves the fixability and stability of the mobile terminal 1 when the mobile terminal holder 1 is attached to the holder 100 fixed to the vehicle by magnetic force.

The holder part 15 can be used by attaching it to a holder 100 fixed to a vehicle in addition to the purpose of using the holder 1 for a mobile terminal by attaching it to a finger, mounting the desk, a kitchen, a dressing table, etc. by adjusting an angle. By doing so, you increase compatibility.

The ring holder 10 is provided with an opening 19 on the front rim so that the user grips and adjusts the angle of the mounting ring 20 accommodated in the mounting portion 13.

As shown in Figures 2 and 3, the opening portion 19 is formed to form a round inclined downward gradually toward the outer portion from the inner portion to the outer portion on the front rim so that the user can easily grip the mounting ring 20 To be able.

Rotating shaft portion 17 is provided at one end of the mounting portion 13 and the mounting ring 20 is rotatably coupled. The pivot shaft portion 17 has a shaft hole 18 formed therethrough. The fixing pin 25 is inserted into the shaft hole 18 for the rotation of the mounting ring 20.

Mounting ring 20 is formed in a ring shape so that the user's fingers can be fitted. Mounting ring 20 is fixed so that the user does not drop the portable terminal when the user inserts the finger using the portable terminal.

The mounting ring 20 has a ring-shaped portion housed in the mounting portion 13 and one end of the ring-shaped portion is rotatable with respect to the rotation shaft portion 17. The mounting ring 20 is formed of a metal material.

One end of the mounting ring 20 is formed with a central concave portion 23 into which the pivot shaft 17 is inserted, and the pivot shaft 17 is inserted into the central concavity 23 to be described below. The pin hole 21 and the shaft hole 18 of the rotating shaft portion 17 are in communication with each other. The central recess 23 allows smooth rotation without the interference between the pivot shaft 17 and the mounting ring 20 when the mounting ring 20 rotates.

In the embodiment, the central concave portion 23 is formed in a semi-circular shape to form the same plane extending from the front surface of the pivot shaft 17 when the mounting ring 20 is horizontally received in the mounting portion 13, When the mounting ring 20 is rotated, it is possible to prevent the interference between the mounting ring 20 and the rotating shaft unit 17 by moving over the rotating shaft unit 17 in a state spaced apart from the rotating shaft unit 17.

Hereinafter, the rotating configuration of the mounting ring will be described in more detail.

FIG. 4 is a sectional view taken along the line A-A of FIG. 3, and FIG. 5 is a sectional view taken along the line B-B of FIG. 3. In FIG. 4, a cross section of the pivot shaft part may be confirmed, and in FIG. 5, a cross section of a configuration in which one end of the mounting ring pivots on the pivot shaft part may be confirmed.

As shown in FIG. 4, the ring holder 10 has a rear surface formed in a flat shape so that attachment to the portable terminal H can be performed stably. The ring holder 10 has a predetermined thickness, the circumferential surface is formed in a curved surface, and the projection 15a is formed in the central holder portion 15. When the circumferential surface of the ring holder 10 is formed into a curved surface, it may provide a beautiful grip and provide a soft grip to the user's hand. The thickness of the ring holder 10 is about 1cm thin and thin when folded through the ring 20 is clean and slim.

The shaft hole 18 penetrates the left and right in the rotation shaft 17 and the fixing pin 25 is inserted. Mounting ring 20 is rotatable with respect to the ring holder 10 is in a state set to 90 degrees.

As shown in Figure 5, the mounting ring 20 is provided with a pin hole 21 at one end thereof. The pin hole 21 may be in communication with the shaft hole 18 of the pivot shaft 17.

The mounting ring 20 is fixed to the pin hole 21 and the shaft hole 18 in a state in which the pin hole 21 provided at one end thereof and the shaft hole 18 provided at the pivot shaft portion 17 communicate with each other. One end of the mounting ring 20 is inserted may be rotatable with respect to the pivot shaft 17.

Any one of the shaft hole 18 of the pivot shaft portion 17 and the pin hole 21 of the mounting ring 10 is coupled to the fixing pin 25 in a seizure manner to be fixed integrally, and the other is fixed to the fixing pin 25. There is a relative allowance so that the rotation of the mounting ring 10 relative to the rotation shaft 17 is smooth.

For example, the fixing pin 25 is inserted into the shaft hole 18 of the rotation shaft portion 17 to be rotated about the pin hole 21 without rotating about the rotation shaft portion 17, thereby causing the shaft hole 18 to be rotated. One end of the mounting ring 10 can be rotated with respect to the fixing pin 25 inserted in the.

The mounting ring 10 has a plurality of angles 26 formed on an outer circumferential surface thereof, and a leaf spring 30 is provided at the mounting portion 13 at a position corresponding to the angle 26 of the mounting ring 10.

The leaf spring 30 is in close contact with one of the plurality of angles 26 of one end of the outer circumferential surface of the mounting ring 10 to provide an elastic force to push up one outer peripheral surface of the mounting ring 10 upward.

A plurality of angles 26 and the leaf spring 30 formed on one outer peripheral surface of the mounting ring 20 is a configuration for adjusting the angle of the mounting ring 20. For example, the plurality of angles 26 may be three angles, and the leaf spring 30 may have a '⊃' shape. A plurality of angles 26 formed at one end of the mounting ring 20 allows the angle of the mounting ring 20 to be adjusted step by step.

The leaf spring 30 is attached to the mounting portion 13 or forms an insertion portion 16 on the ring holder 10, and one side of the '⊃' shaped leaf spring 30 to the insertion portion 16. The other side may be inserted into the mounting portion 13 in a manner of being inserted.

In the present embodiment, the leaf spring 30 inserts one side of the '⊃'-shaped leaf spring 30 into the insertion portion 16 formed to be open to the ring support 10 to the rear side, and the opposite side is the mounting portion 13. ) To provide an elastic force that pushes the outer circumferential surface of the mounting ring 20 upward.

The leaf spring 30 has one side inserted into the inserting portion 16 into one plate shape, and the other side disposed on the mounting portion 13 has two plate shapes separated from two plate portions into one plate shaft. After being disposed on both sides of the (17) it may be to provide an elastic force to push up at the same time on both ends of the mounting ring 20 at the same time.

If the leaf spring 30 is configured in a manner of fitting to the insertion portion 16 formed in the mounting portion 13, it is easy to manufacture because the assembly is completed just by manufacturing each component and fitting.

Hereinafter, the operation of the present invention.

First, the rotation process of the mounting ring will be described with reference to FIGS. 1 and 5.

As shown in FIG. 1, the mounting ring 20 is gripped by a portion of the mounting ring 20 exposed by the opening 19 and rotated in a state where the mounting ring 20 is horizontally received at the edge of the mounting portion 13. If one end of the mounting ring 20 is rotated with respect to the rotation shaft 17.

At this time, as can be seen in the enlarged view shown in Figure 5, once the force is applied to the mounting ring 20 and removing the force, one end angle (a) of the mounting ring 20 is the leaf spring 30 While being in close contact with the plate spring 30 is pushed upward by the elastic force is maintained in an angle adjusted state.

In this state, by applying more force to rotate the mounting ring 20 and removing the force, as shown in FIG. 5, one end angle b of the mounting ring 20 is in close contact with the leaf spring 30 and the leaf spring. The angle adjusted state is maintained by the force pushed upward by the 30.

The above configuration is in close contact with any one of the plurality of angles (a, b, c) and the angle (a, b, c) formed at one end of the mounting ring 20, not the friction force between the pin and the pin hole The angle of the mounting ring 20 is adjusted by the leaf spring 30 which provides the angle and maintains the angle adjusted state, so that the angle can be adjusted with little force, and the support force and durability keep the angle adjusted stably. Can be.

FIG. 6 is a view showing an example in which the mobile terminal holder according to the present invention is attached to the rear of the mobile terminal, and FIG. 7 shows the mobile terminal holder according to the present invention attached to the vehicle holder. An illustration is shown showing an example.

The mobile terminal holder 1 adjusts the angle of the mounting ring 20 with respect to the ring holder 10 in a state of being attached to the rear side of the mobile terminal H, and is carried in a state where a finger is placed in the mounting ring 20. can do.

Alternatively, as shown in FIG. 6, the holder 1 for the portable terminal is adjusted to an angle of the mounting ring 20 with respect to the ring holder 10 in a state where it is attached to the rear of the portable terminal H, such as a desk or a floor. Can be mounted on.

Alternatively, as shown in FIG. 7, the cradle 1 for the portable terminal may be attached to the vehicle cradle 100 which is fixed to the vehicle. In a state in which the mounting ring 20 is horizontally received at the edge of the mounting portion 13, the magnet is attached to the attachment portion 101 of the holder 100 to which the center holder portion 15 of the mounting portion 13 is fixed to the vehicle. Can be attached by type.

When the portable terminal holder 1 attached to the rear of the portable terminal H is attached to the attachment portion 101 of the holder 100 fixed to the vehicle by magnetic force, the portable terminal H is gripped by hand and the driver The mobile terminal H can be easily removed from the cradle 100 fixed to the vehicle by a simple operation of pulling to the side.

The above-described portable terminal holder 1 is easy to carry in a state where a finger is placed in the mounting ring, the angle can be adjusted with little force, and the angle-adjusted state is stably maintained.

In addition, the above-described portable terminal holder 1 is used to prevent the mobile terminal (H) from dropping by being inserted into a finger, for mounting on a desk, kitchen, dressing table, etc. by adjusting an angle, the holder 100 fixed to a vehicle. It can be used for various purposes, such as for use by attaching it by magnetic force.

8 is a block diagram showing the overall configuration of a wireless charging system according to an embodiment of the present invention, the wireless charging system shown includes a portable terminal 50, a terminal accessory 100 and a wireless charging module 200 Can be configured.

Referring to FIG. 8, the portable terminal 50 may be a device such as a smartphone, a PDA, a tablet PC, or the like, and may be a device capable of wireless charging.

For example, the portable terminal 50 may include a reception coil for wireless charging of a magnetic induction method, and thus, an induced current may be generated in the reception coil by a magnetic field generated by the transmission coil, thereby charging the battery.

The terminal accessory 100 is attached to the back of the portable terminal 50 and may be, for example, various structures such as a smart ring, a mobile phone case, a bracket, or a clamp.

According to an embodiment of the present invention, the terminal accessory 100 has a transmitting coil 101 for generating a magnetic field for wireless charging of the magnetic induction method.

Due to the magnetic field generated by the transmission coil 101 built into the terminal accessory 100, electromagnetic induction occurs in the reception coil 51 built into the portable terminal 50, so that an induced current is generated. The battery (not shown) may be wirelessly charged.

On the other hand, the wireless charging module 200 is configured to be separated from the terminal accessory 100, and has a structure that can be combined with the terminal accessory 100 when necessary (for example, wireless charging).

The wireless charging module 200 is provided with a circuit unit 201 for supplying AC power to the transmitting coil 101 of the terminal accessory 100.

Here, the circuit unit 201 may be embedded in the wireless charging module 200, but the present invention is not limited thereto, and at least some of the components constituting the circuit unit 201 are external to the wireless charging module 200. It may be implemented.

In addition, as shown in FIG. 8, the terminal accessory 100 and the wireless charging module 200 may be provided with a first ground terminal 131 and a second ground terminal 231, respectively.

When the terminal accessory 100 and the wireless charging module 200 are coupled to each other, the first and second ground terminals 131 and 231 are in contact with each other so that the terminal accessory 100 is connected to the circuit 201 of the wireless charging module 200. AC power may be supplied to the transmitting coil 101 of the.

According to an embodiment of the present invention, as described above, the wireless charging module 200 provided with a circuit unit 201 by embedding the transmitting coil 101 in the terminal accessory 100 fixed to the back of the portable terminal 50 and When combined, the AC power is supplied through the ground terminals 131 and 231 to allow the portable terminal 50 to be wirelessly charged using the magnetic field generated by the terminal accessory 100. Even when the accessory 100 such as a case is mounted, the wireless charging can be effectively performed.

9 is a perspective view showing the configuration of a terminal accessory according to an embodiment of the present invention, an embodiment of a case where the terminal accessory 100 is implemented by a smart ring including a ring. FIG. 10 illustrates an embodiment of a cross-sectional configuration of the terminal accessory 100 shown in FIG. 9.

Referring to FIG. 9, the terminal accessory 100 may include a ring 110, an adhesive plate 120, and a first ground portion 130.

The ring 110 has a shape similar to a ring so that a user can insert a finger, and when the contact with the bottom surface (not shown) expands the contact area, the terminal accessory 100 stably supports the portable terminal 50. One side may have a flat shape in order to be able to do so.

On the other hand, the ring 110 may be made of a metal or plastic material of high strength so as not to be easily damaged by the user, and is connected to the adhesive plate 120 using the connection member 111 to rotate by a predetermined angle to the portable terminal It may be folded or unfolded in the back direction of 50.

The adhesive plate 120 is attached to the rear surface opposite to the front surface on which the screen of the portable terminal 50 is formed, and is attached to the back surface of the portable terminal 50 so that the adhesive material of polyurethane or silicone material is maintained as it is ( (Not shown).

Referring to FIG. 10, the adhesive plate 120 is composed of a first plate 125 and a second plate 121, and the first plate 125 and the second plate 125 are bonded to each other using an adhesive material. Or engagement or screwed by grooves and protrusions.

The first plate 125 of the adhesive plate 120 may be made of a thermoplastic resin-based material or metal such as plastic, and the second plate 121 may correspond to the first plate 125 in a polyurethane material or It may be made of a silicone adhesive material.

On the other hand, the first ground portion 130 is located on the adhesive plate 120, as shown in Figure 9 may have a circular shape and the first ground terminal 131 is formed in the center portion.

As shown in FIG. 10, the first grounding unit 130 is formed by the ring 110 in a state where the ring 110 of the terminal accessory 100 is folded in the rear direction of the portable terminal 50. It may be formed to be located inside the circular space.

In addition, in order for the terminal accessory 100 and the wireless charging module 200 to be coupled by magnetic force, the first ground portion 130 may be configured to include a metal or a magnet.

According to an embodiment of the present invention, the transmitting coil 101 may be embedded in the adhesive plate 120 as described above, more specifically, the first plate 125 of the adhesive plate 120.

The transmission coil 101 embedded in the first plate 125 of the adhesive plate 120 is connected to the first ground terminal 131 of the first ground unit 130, thereby providing a terminal accessory 100 and a wireless charging module ( When the 200 is coupled to each other by using the first and second ground parts 130 and 230, AC power supplied from the wireless charging module 200 through the first ground terminal 131 is transmitted to the transmission coil 101 to generate a magnetic field. This may occur.

According to one embodiment of the invention, the wireless charging module 200 may be implemented in the form of a vehicle holder for use in the vehicle.

11 is a perspective view showing the configuration of a wireless charging module according to an embodiment of the present invention, the wireless charging module 200 is an embodiment of the case is implemented in a form that can be fixed by fitting coupling or adsorptive force on a vehicle. .

Referring to FIG. 11, the wireless charging module 200 may include an attachment part 210, a fixing part 220, and a connection part 260.

Attachment portion 210 of the wireless charging module 200 is for coupling the wireless charging module 200 and the terminal accessory 100, for example, the attachment portion 210 and the terminal accessory of the wireless charging module 200. 100 may be attached to the magnet type.

The attachment portion 210 is formed with a second ground portion 230 which is coupled with the first ground portion 130 of the terminal accessory 100, and the second ground portion 230 is the first ground portion of the terminal accessory 100. It may have a shape (eg, a circle) and a size corresponding to the branch portion 130.

On the other hand, the second ground terminal 231 is located in the center portion of the second ground portion 230, when the first ground portion 130 and the second ground portion 230 is combined with the first ground terminal 131 The second ground terminal 231 may be in contact with each other so that AC power may be supplied from the circuit unit 201 of the wireless charging module 200 to the transmission coil 101 of the terminal accessory 100.

As described above, in order for the terminal accessory 100 and the wireless charging module 200 to be attached by magnetic force, the attaching portion 210 or the second grounding portion 230 of the wireless charging module 200 includes a magnet, The first ground portion 130 of the terminal accessory 100 may have a magnet.

For example, a magnet is embedded in the first ground portion 130 side of the terminal accessory 100 and a magnet of opposite polarity is embedded in the attachment portion 210 of the wireless charging module 200 or the terminal accessory 100 is embedded. The magnet may be embedded in any one of the first ground portion 130 and the attachment portion 210 of the wireless charging module 200 and the other may be made of metal and attached to each other by magnetic force.

As described above, the attachment part 210 of the terminal accessory 100 and the wireless charging module 200 are attached to the magnet and the magnet or the magnet and the metal structure, so that the portable terminal accessory 100 is attached to the back while driving the vehicle. The mobile terminal 50 can be easily and stably coupled to the wireless charging module 200 by a simple operation of holding the terminal 50 by hand and taking it to the wireless charging module 200. The mobile terminal 50 can be easily separated from the wireless charging module 200 by a simple operation of pulling to the side.

In addition, the second ground portion 230 is formed to be introduced into the attachment portion 210 of the wireless charging module 200 by a predetermined depth, when coupled with the first ground portion 130 of the terminal accessory 100 by magnetic force. The first and second ground terminals 130 and 231 may be seated in the concave space formed by the second ground portion 230 of the attachment portion 210 with little play. It can be aligned and contacted in the correct position.

The attachment part 210 of the wireless charging module 200 may include a circuit part 201 for supplying AC power to the transmission coil 101 of the terminal accessory 100.

When the terminal accessory 100 and the wireless charging module 200 are coupled, the AC power output from the circuit unit 201 is connected to the terminal accessory 100 through the first and second ground terminals 131 and 231 in contact with each other. It is supplied to the transmitting coil 101.

The fixing unit 220 is for fixing the wireless charging module 200 to the vehicle by fitting coupling. For example, as shown in FIG. 11, a pair of fittings that can be fitted to the air vent of the vehicle (not shown) are shown. It may include a coupling pin 221.

Coupling pin 221 is elastically deformed and fitted into the blower of the vehicle can be firmly fixed to the fitted state.

In the above described one embodiment of the present invention taking an example that the fixing portion 220 is provided with a pair of elastically deformable coupling pins 221, the present invention is not limited to this, the elastic deformation in the vent of the vehicle Various shapes may be employed that can be fitted by and press-fitted.

In addition, the fixing unit 220 of the wireless charging module 200 may be configured to be fixed to the vehicle by the adsorption method.

On the other hand, the attachment portion 210 and the fixing portion 220 of the wireless charging module 200 is connected by the connecting portion 260, the connecting portion 260 may be configured to enable angle adjustment by rotation.

For example, the attachment portion 210 and the fixing portion 220 of the wireless charging module 200 may be connected by a ball joint means, so that the attachment portion 210 may be rotatable with respect to the fixing portion 220.

The ball joint means inserts and connects two balls into an empty spherical ball housing, and can be freely rotated 360 degrees, thereby making it easy to adjust up, down, left and right angles of the portable terminal 50.

In this case, the attachment portion 210 and the fixing portion 220 of the wireless charging module 200 may be provided with a ball (ball) for connecting with the ball joint means, respectively.

The ball of the attachment portion 210 and the ball of the fixing portion 220 are respectively inserted into the ball housing of the hollow inside, rotatable with respect to the ball housing, respectively, so that the attachment portion 210 is fixed portion 220 360 degrees of free rotation may be possible with respect to.

The spherical ball housing with an empty inside is composed of two bodies so that two balls can be inserted therein and fixed with bolts and nuts, and ball fixing means (not shown) for fixing two balls are rotated. It may further include.

The ball fixing means is a movable member having two inclined surfaces and disposed between two balls so that the two inclined surfaces may be in close contact with the two balls to fix a state in which the two balls are rotated.

According to another embodiment of the present invention, a guide part for facilitating coupling between the first ground part 130 of the terminal accessory 100 and the second ground part 230 of the wireless charging module 200. Each may be formed.

Referring to FIG. 12A, the first ground terminal 131 is positioned at the center of the circular first ground portion 130, and is easily coupled to the wireless charging module around the first ground terminal 131. The first guide part 135 for the purpose is formed.

Meanwhile, referring to FIG. 12B, the second ground terminal 231 is positioned at the center of the circular second ground portion 230, and the terminal accessory 100 is located around the second ground terminal 231. A second guide part 235 may be formed to facilitate coupling with the terminal accessory 100 to correspond to the first guide part 135 formed on the first ground part 130.

Here, any one of the first and second guide parts 135 and 235 may include one or more fixing protrusions, and the other may include one or more fixing grooves into which the fixing protrusions are inserted.

For example, a plurality of fixing protrusions are formed in a radial shape on the first ground portion 130 of the terminal accessory 100, and a plurality of fixing grooves are formed in the second ground portion 230 of the wireless charging module 200. It may be formed radially of the date.

On the other hand, the fixing projection of the date is formed to have an inclination that the height is lowered toward both ends from the center, the fixing groove is also formed to have an inclination corresponding to the inclination of the fixing protrusion, the fixing protrusion is inserted into the fixing groove When natural bonding can be induced.

As described above, the first and second guide parts 135 and 235 formed of the fixing protrusion and the fixing groove are respectively connected to the first and second ground parts 130 and 230 to which the terminal accessory 100 and the wireless charging module 200 are coupled. By forming, the positions of the first and second ground terminals 131 and 231 can be easily aligned at the time of coupling, thereby improving wireless charging efficiency.

That is, when the terminal accessory 100 and the wireless charging module 200 are attached to each other by magnetic force, a plurality of fixing protrusions formed in the first ground portion 130 may be formed in the plurality of fixing grooves formed in the second ground portion 230. Naturally, the positions of the first ground terminal 131 and the second ground terminal 231 are exactly matched while being inserted, and any rotation or flow may be prevented after coupling.

Accordingly, while the terminal accessory 100 and the wireless charging module 200 are coupled to each other to perform wireless charging, the position of the first ground terminal 131 and the second ground terminal 231 is displaced so that the wireless charging is not performed. The wireless charging efficiency may be lowered to prevent the charging speed from being reduced.

FIG. 13 is a block diagram illustrating an example of a configuration of a circuit unit included in the wireless charging module. The circuit unit 201 of the wireless charging module 200 illustrated includes a power supply unit 202 and a conversion unit 203. Can be configured.

Referring to FIG. 13, the power supply unit 202 may receive a DC power from an external source, and may include a step-down transformer for lowering a supply voltage to a desired level and a rectifier circuit for converting an AC voltage into a DC signal.

In addition, the power supply unit 202 may be connected to a cable of a separate charger may be provided with a power terminal for receiving power from the outside.

The conversion unit 203 may include an oscillator for converting the DC voltage input from the power supply unit 202 into high frequency AC power and transferring the DC voltage to the transmission coil 101 through the second ground terminal 231. .

FIG. 14 is a perspective view illustrating a state in which a terminal accessory and a wireless charging module are coupled to each other, and descriptions of the same elements as those described above in FIG. 14 will be omitted.

Referring to FIG. 14, a terminal accessory 100 including a ring 110 on a rear surface of a portable terminal 50, for example, a smartphone and having a transmitting coil 101 embedded therein may be attached to the adhesive plate 120. Can be.

On the other hand, the wireless charging module 200, one side is fixed to the air vent of the vehicle through the fixing unit 220, the other side is formed with an attachment portion 210 is built in the circuit unit 201.

In a state where the hook 110 of the terminal accessory 100 attached to the rear surface of the portable terminal 50 is folded, the wireless charging module 200 includes the first grounding unit 130 disposed in the inner space of the folded hook 110. When taken to the attachment portion 210 formed on the other side of, the first ground portion 130 of the terminal accessory 100 and the attachment portion 210 of the wireless charging module 200 by magnetic force can be coupled.

At this time, the plurality of fixing protrusions formed in the first ground portion 130 of the terminal accessory 100 are inserted into the plurality of fixing grooves formed in the second ground portion 230 of the wireless charging module 200, and thus the terminal accessories ( Positions of the first ground terminal 131 of the 100 and the second ground terminal 231 of the wireless charging module 200 may be aligned with each other.

When the first ground terminal 131 of the terminal accessory 100 contacts the second ground terminal 231 of the wireless charging module 200, the AC power output from the circuit unit 201 of the wireless charging module 200 is removed. The first and second ground terminals 131 and 231 are transmitted to the transmission coil 101, and electromagnetic waves are generated in the transmission coil 101 by the transferred AC power.

As described above, current is induced in a receiving coil (not shown) built in the portable terminal 50 by the electromagnetic generated from the transmitting coil 101 of the terminal accessory 100, and by the current induced in the receiving coil. A battery (not shown) of the portable terminal 50 may be charged.

Here, the attachment position of the terminal accessory 100 so that the position of the transmitting coil 101 of the terminal accessory 100 and the position of the receiving coil of the portable terminal 50 exactly match through the product manual of the terminal accessory 100, and the like. Can be guided to the user.

Since the position of the receiving coil for wireless charging may vary slightly depending on the manufacturer or product name of the portable terminal 50, the attachment position of the terminal accessory 100 may be guided differently according to the manufacturer or product name.

As described above, when the terminal accessory 100 is attached to the back of the portable terminal 50 so that the position of the transmitting coil 101 of the terminal accessory 100 and the position of the receiving coil of the portable terminal 50 exactly match, When combined with the wireless charging module 200, the charging efficiency may be improved and the charging speed may be increased, and rotation or flow may be prevented by the magnetic coupling and the guide parts 135 and 235 to maintain stable charging efficiency. Can be.

In the above, the smart ring including a ring has been described as an example for the terminal accessory 100 fixed to the rear of the portable terminal 50. However, the present invention is not limited thereto, and the form is mounted on the rear of the portable terminal 50. Smartphone case may also be implemented as a terminal accessory 100 having the configuration as described above.

In this case, the first grounding unit 130 having the first grounding terminal 131 as described above may be provided at the center portion of the outer surface of the smart phone case mounted on the rear surface of the portable terminal 50, and the smart phone case As described above, the transmitting coil 101 may be built-in to receive AC power from the circuit unit 201 of the wireless charging module 200 through the first ground terminal 131 to generate a magnetic field for wireless charging.

On the other hand, the wireless charging module 200 has been described as an example of a stationary device that is fixed to the vehicle, but the present invention is not limited to this, and the table type of the type that can be placed on the floor as shown in FIG. It may be implemented as a wireless charging module.

Referring to FIG. 15, a second ground part 330 in which a second ground terminal 331 is formed may be located on an upper surface of the desk type wireless charging module 300, and a second ground part 330 and a second ground part may be disposed. The configuration of the terminal 331 may be the same as the second ground portion 230 and the second ground terminal 231 as described above.

On the other hand, the desk-type wireless charging module 300 has a circuit unit 201 as described above, it is possible to provide an AC power to be supplied to the transmission coil 101 of the terminal accessory (100).

The desk type wireless charging module 300 may be provided with a power terminal 310 is inserted into the cable 400 of the charger to receive power from the outside.

As shown in FIG. 14, in a state in which the ring 110 of the terminal accessory 100 attached to the rear surface of the portable terminal 50 is folded, the first ground portion 130 disposed in the inner space of the folded ring 110. To the second ground portion 330 of the desk type wireless charging module 300, the first ground portion 130 of the terminal accessory 100 and the second contact of the desk type wireless charging module 300 are caused by magnetic force. The branch 330 may be combined to start wireless charging.

According to still another embodiment of the present invention, a circuit unit for supplying AC power to the transmitting coil is provided outside the wireless charging module to be connected to the wireless charging module through a cable, thereby miniaturizing the wireless charging module and at the same time according to the magnetic field. Malfunction of the circuit can be prevented, and the terminal accessory can be rotated in a state fixed to the back of the portable terminal, thereby improving convenience of use.

Hereinafter, the configuration of the wireless charging system according to another embodiment of the present invention will be described in more detail with reference to FIGS. 16 to 20.

FIG. 16 is a perspective view illustrating an overall configuration of a wireless charging system according to another embodiment of the present invention, and descriptions of the same elements as those described with reference to FIGS. 1 to 15 will be omitted below. .

Referring to FIG. 16, the wireless charging device includes a terminal accessory 500 and a wireless charging module 600, and the wireless charging module 600 adjusts the angle of the portable terminal to which the terminal accessory 500 is attached. It can be combined with the ball 700 used in the ball joint structure for.

The terminal accessory 500 has a structure in which the front housing is rotatable by the user while the rear housing is fixed to the rear of the portable terminal, and a circuit unit for supplying AC power to the transmitting coil of the terminal accessory 500 (not shown) At least some of the time) may be provided outside the wireless charging module 600 to be connected to the wireless charging module 600 through the cable 650.

17 and 18 illustrate a detailed configuration of the terminal accessory illustrated in FIG. 16. FIG. 18 is a cross-sectional view illustrating a cross-sectional configuration of the terminal accessory 500 illustrated in FIG. 17 taken along line aa ′. to be.

Referring to FIGS. 17 and 18, the terminal accessory 500 has a shape similar to a ring to allow a user to insert a finger, and rotates by a predetermined angle using the hinge portion 540 in the rear direction of the portable terminal. It may have a ring 510 that can be folded or unfolded.

In addition, the terminal accessory 500 is in contact with the front housing 520 and the second ground terminal of the wireless charging module 600 forming a front appearance, and the first ground terminal for supplying AC power to the transmission coil 570. 530, a metal plate 550 made of a metal, such as iron (Fe), may be provided to attach to the magnet of the wireless charging module 600.

Meanwhile, the terminal accessory 500 may be coupled to the rear housing 580 such that the rear housing 580 is fixed to the rear side of the portable terminal, and the front housing 520 is rotatable.

Referring to FIG. 18, the rear housing 580 is made of synthetic resin such as plastic, and is attached to the rear of the portable terminal using an adhesive member such as a double-sided tape, and is fixed to the rear housing. 580 may be coupled to surround the side portion.

Meanwhile, the terminal accessory 500 may include a rotating member 567 that rotates together with the front housing 520, and at least one plate 560, 567 for supporting the rotating member 567.

More specifically, the rotating member 567 made of synthetic resin, such as plastic, is fixedly coupled with the front housing 520 to rotate together, and the disk-shaped first plate 560 made of metal, such as iron (Fe), and the like. The second plate 565 may be configured to blink at least a portion of the rotating member 567 up and down.

Meanwhile, as shown in FIG. 18, at least one of the first and second plates 560 and 565 may be fixed to the rear housing 580, and more specifically, the second plate 565 may include the rear housing ( It is fixed to the 580 and the first plate 560 is combined with the second plate 565 may serve only to support the rotating member 567 up and down without rotating relative to the rear housing 580.

The transmitting coil 570 may be located between the rear housing 580 and the plates 560, 565, and more particularly, between the second plate 565 and the bottom of the rear housing 580.

The transmitting coil 570 may be electrically connected to the first ground terminal 530 to receive AC power to generate a magnetic field for wireless charging.

19 is a view illustrating a detailed configuration of the wireless charging module shown in FIG. 16.

Referring to FIG. 19, the wireless charging module 600 may include an attachment part 610 that is magnetically attached to the first ground part of the terminal accessory 500, a body 620 that is coupled to a ball 700 of a ball joint structure, and It may be configured to include a module cable 650 for supplying AC power.

A second ground having a magnet to which the metal plate 550 of the terminal accessory 500 is magnetically attached to the attachment part 610 and a second ground terminal to which the first ground terminal 530 of the terminal accessory 500 contacts. Additional may be included.

Meanwhile, at least a part of a circuit unit for supplying AC power to the transmission coil 570 of the terminal accessory 500 is provided outside the wireless charging module 600 and is connected to the wireless charging module 600 through the module cable 650. It can be connected with.

For example, the circuit unit may include an external first circuit unit connected to the wireless communication module 600 through a module cable 650 and a second circuit unit embedded in the wireless charging module 600.

Referring to FIG. 20, a circuit module 670 including a first circuit part, which is a part of the circuit part as described above, may be connected to an end of the module cable 650.

Here, the first circuit part constituting the circuit module 670 of the module cable 650 may include a power supply unit for receiving DC power from the outside and a conversion unit for converting the power supplied through the power supply unit into AC power. Can be.

On the other hand, the second circuit portion of the circuit portion embedded in the wireless charging module 600, the AC power is converted in the first circuit portion and input to the wireless charging module 600 through the module cable 650 to the second ground terminal. It may include a power supply for applying.

Here, the power applying unit may be embedded in the main body 620 of the wireless charging module 600.

Referring to FIG. 20, the circuit module 670 provided in the module cable 650 may be provided with a power terminal 671 for connecting an external power cable 800.

Meanwhile, although FIG. 20 illustrates an embodiment of the present invention with an example in which the circuit module 670 is provided at the end of the module cable 650, the present invention is not limited thereto, and the circuit module 670 is a module cable. It may be connected to the middle portion of the 650, the power terminal 671 for connecting the power cable 800 may be included in a separate adapter provided at the end of the module cable (650).

BEST MODE FOR CARRYING OUT THE INVENTION The present invention has been disclosed in the drawings and the specification. Herein, specific terms have been used, but they are used only for the purpose of illustrating the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims. Therefore, it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical scope of the present invention will be defined by the technical spirit of the appended claims.

1: holder for mobile terminal 10: ring holder
11: mounting surface 13: mounting portion
14: edge 15: holder portion
15a: protrusion 16: insert
17: fixed shaft portion 18: shaft hole
19: opening 20: mounting ring
21: pin ball 23: central recess
25: fixed pin 26: angle (a, b, c)
50: portable terminal 51: receiving coil
100, 500: terminal accessory 101, 570: transmission coil
110, 510: ring 111: connecting member
120: adhesive plate 130: first ground portion
131 and 530: first ground terminal 135: fixing protrusion
200, 600: wireless charging module 201: circuit part
210, 610: attachment part 220: fixing part
221: coupling pin 230: second ground portion
231: second ground terminal 235: fixing groove
260: connection portion 300: desktop wireless charging module
310, 671: power supply terminal 400: charging cable
520: front housing 540: hinge
550: metal plate 560: first plate
565: second plate 567: rotating member
580: rear housing 620: main body
650: module cable 670: circuit module
700: ball 800: power cable

Claims (17)

A terminal accessory fixed to the rear side of the portable terminal, the terminal accessory having a transmission coil for generating a magnetic field for wireless charging of a magnetic induction method; And
And a wireless charging module that can be combined with the terminal accessory and has a circuit unit for supplying AC power to the transmitting coil.
The terminal accessory and the wireless charging module are provided with a first ground terminal and a second ground terminal, respectively, when the terminal accessory is coupled to the wireless charging module, the first and second ground terminals are in contact with each other to transmit from the circuit unit. Portable terminal wireless charging device characterized in that the AC power is supplied to the coil. The device of claim 1, wherein the terminal accessory is
One side is bonded to the back of the portable terminal, the other side is a portable terminal wireless charging device, characterized in that the rotatable ring and the first ground portion provided with the first ground terminal is formed. The method of claim 2, wherein the first ground portion
The mobile terminal wireless charging device, characterized in that the ring is formed to be located inside the circular space formed by the ring in a state folded in the rear direction of the portable terminal. The method of claim 2,
The first ground terminal is positioned at the center of the circular first ground portion, and a portable terminal is provided around the first ground terminal to facilitate coupling with the wireless charging module. Wireless charging device. The wireless charging module of claim 4, wherein
A second ground portion coupled to a first ground portion of the terminal accessory and provided with the second ground terminal;
The second ground terminal is positioned at the center of the circular second ground portion, and a second guide portion is formed around the second ground terminal to correspond to the first guide portion to facilitate coupling with the terminal accessory. Portable terminal wireless charging device characterized in that there is. The method of claim 5,
Any one of the first and second guide portion includes one or more fixing projections, the other one of the portable terminal wireless charging device characterized in that it comprises one or more fixing grooves into which the fixing projections are inserted. The method of claim 6,
When the fixing projection is inserted into the fixing groove, the portable terminal wireless charging device, characterized in that the position of the first and second ground terminals are aligned and in contact with each other. The method of claim 5,
And at least one of the first and second ground parts includes a magnet, and the terminal accessory and the wireless charging module are attached by magnetic force. The wireless charging module of claim 1, wherein
And a fixed part fixed to the vehicle by fitting coupling or suction force. The method of claim 1, wherein the circuit portion
A power supply unit for receiving DC power from the outside; And
And a conversion unit for converting the supplied power into AC power.
The converted AC power can be supplied to the transmission coil of the terminal accessory through the second ground terminal, characterized in that the portable terminal wireless charging device. The method of claim 1, wherein the circuit portion
Portable terminal wireless charging device, characterized in that built in the wireless charging module. The method of claim 1, wherein the circuit portion
At least a part of the wireless charging module is provided outside the portable terminal wireless charging device, characterized in that connected to the wireless charging module via a cable. The method of claim 10, wherein the circuit portion
An external first circuit unit connected to the wireless communication module through the cable and a second circuit unit embedded in the wireless charging module;
The first circuit unit includes a power supply unit for receiving DC power from the outside; And a conversion unit for converting the supplied power into AC power.
And the second circuit unit includes a power applying unit for applying the converted AC power to the second ground terminal. The device of claim 1, wherein the terminal accessory is
A rear housing fixed to the rear of the portable terminal; And
And a front housing coupled to the rear housing to be rotatable. The method of claim 14,
A rotating member rotating together with the front housing; And
And at least one plate for supporting the rotating member. The method of claim 15, wherein the plate
A first plate and a second plate surrounding at least a portion of the rotating member up and down;
And at least one of the first and second plates is fixed to the rear housing. The method of claim 15, wherein the transmitting coil
Portable charging device, characterized in that located between the rear housing and the plate.

Images