KR102131172B1 - Supporter - Google Patents

Abstract

The cradle includes a first case, a second case, a printed circuit board, a sweep coil and a heat sink. The printed circuit board is disposed on the second case and includes at least one opening. The transmitting coil is disposed on the printed circuit board. The heat sink is disposed between the printed circuit board and the transmitting coil and contacts at least a portion of the second case.

Description

Bracket {SUPPORTER}

The embodiment relates to a cradle capable of mounting and charging an object.

Recently, wireless power transmission or wireless energy transfer technology that wirelessly transfers electric energy to a desired device has been actively researched and developed.

In order to use the wireless power transmission technology, a transmitting end for transmitting wireless power and a receiving end for receiving the transmitted wireless power may be provided.

The transmitting end may be provided in a case (hereinafter referred to as a cradle), and the receiving end may be provided in a wireless terminal. Therefore, the wireless power transmitted from the transmitting end of the cradle is received by the receiving end to charge the wireless terminal.

For example, although the portable terminal holder is disclosed in Utility Model Registration No. 20-0451879, the holder is limited to charging the portable terminal by wire.

The embodiment provides a cradle capable of maximizing heat dissipation efficiency.

According to an embodiment, the cradle includes: a first case; A second case fastened to the first case; A printed circuit board disposed on the second case and including at least one opening; A transmitting coil disposed on the printed circuit board; And a heat sink disposed between the printed circuit board and the transmitting coil. The heat sink is in contact with at least a portion of the second case.

According to an embodiment, the wireless terminal receives wireless power from the transmitting coil of the cradle.

According to the embodiment, there are the following effects.

First, the heat sink disposed under the transmitting coil penetrates the printed circuit board and contacts the heat dissipation plate, so that heat generated from the transmission coil is quickly discharged to the outside via the heat sink and the heat dissipation plate, thereby improving the discharge efficiency. .

Second, a heat sink disposed under the transmission coil is in contact with the printed circuit board, and an electronic device mounted on the printed circuit board is attached to the case through a heat dissipation pad, so that heat generated from the transmission coil is heat sink and the printed circuit board. , It is quickly discharged to the outside through the electronic device and the heat dissipation plate can improve the discharge efficiency.

Meanwhile, various other effects will be disclosed directly or implicitly in the detailed description according to embodiments to be described later.

1 is a view for explaining a wireless power transmission system according to an embodiment.
2 is an equivalent circuit diagram of a transmission induction coil according to an embodiment.
3 is an equivalent circuit diagram of a power source and a wireless power transmitter according to an embodiment.
4 is an equivalent circuit diagram of a wireless power receiver according to an embodiment.
5 is a side perspective view showing a wireless terminal holder according to an embodiment.
6 is a front perspective view showing a wireless terminal holder according to an embodiment.
7 is a side perspective view showing a state in which the wireless terminal is inserted into the wireless terminal holder according to the embodiment.
8 is a side perspective view showing a state after the wireless terminal is inserted into the wireless terminal holder according to the embodiment.
9 is a front perspective view showing a state after the wireless terminal is inserted into the wireless terminal holder according to the embodiment.
10 is an exploded perspective view showing a wireless terminal holder according to an embodiment.

In the description of the embodiment, in the case of being described as being formed in the "top (top) or bottom (bottom)" of each component, the top (top) or bottom (bottom) is the two components are in direct contact with each other or It includes all that is formed by placing one or more other components between the two components. In addition, when expressed as “up (up) or down (down)”, it may include the meaning of the downward direction as well as the upward direction based on one component.

Before describing the cradle, let's look at a system that reflects the overall concept of transmitting wireless power.

1 is a view for explaining a wireless power transmission system according to an embodiment.

Referring to FIG. 1, a wireless power transmission system according to an embodiment may include a power source 100, a wireless power transmitter 200, a wireless power receiver 300 and a load end 400.

In an embodiment, the power source 100 may be included in the wireless power transmitter 200, but is not limited thereto.

The wireless power transmitter 200 may include a transmission induction coil 210 and a transmission resonance coil 220.

The wireless power receiving apparatus 300 may include a receiving resonance coil 310, a receiving induction coil 320, and a rectifying unit 330.

Both ends of the power source 100 may be connected to both ends of the transmission induction coil 210.

The transmission resonant coil 220 may be disposed at a predetermined distance from the transmission induction coil 210.

The receiving resonant coil 310 may be disposed at a predetermined distance from the receiving induction coil 320.

Both ends of the receiving induction coil 320 may be connected to both ends of the rectifying part 330, and the load end 400 may be connected to both ends of the rectifying part 330. In an embodiment, the load end 400 may be included in the wireless power receiving device 300.

The power generated from the power source 100 is transmitted to the wireless power transmission device 200, and the power delivered to the wireless power transmission device 200 is resonant with the wireless power transmission device 200 by a resonance phenomenon, that is, The resonance frequency value may be transmitted to the same wireless power receiver 300.

Hereinafter, the power transmission process will be described in more detail.

The power source 100 may generate AC power having a predetermined frequency and transmit it to the wireless power transmitter 200.

The transmission induction coil 210 and the transmission resonant coil 220 may be inductively coupled. That is, the transmission induction coil 210 generates an AC current by AC power supplied from the power source 100, and AC current is also generated in the transmission resonant coil 220 that is physically separated by electromagnetic induction by the AC current. Can be derived.

Thereafter, the power transmitted to the transmission resonance coil 220 may be transmitted to the wireless power receiving apparatus 300 having the same resonance frequency by using the wireless power transmission apparatus 200 and the frequency resonance method by resonance.

Power may be transmitted by resonance between two impedance matched LC circuits. The power transmission by the resonance enables power transmission with a higher transmission efficiency up to a longer distance than the power transmission by the electromagnetic induction method.

The reception resonant coil 310 may receive power transmitted from the transmission resonant coil 220 using a frequency resonance method. An AC current may flow through the reception resonant coil 310 due to the received power, and the power delivered to the reception resonant coil 310 is inductively coupled to the reception resonant coil 310 by electromagnetic induction, and the reception induction coil 320. Can be delivered to Power delivered to the receiving induction coil 320 may be rectified through the rectifying unit 330 and transmitted to the load terminal 400.

In an embodiment, the transmission induction coil 210, the transmission resonance coil 220, the reception resonance coil 310, and the reception induction coil 320 may have any one structure of a spiral or helical structure, but need not be limited thereto. none.

The transmitting resonant coil 220 and the receiving resonant coil 310 may be resonantly coupled to enable power transmission at a resonance frequency.

Due to the resonant coupling of the transmission resonant coil 220 and the reception resonant coil 310, power transmission efficiency between the wireless power transmitter 200 and the wireless power receiver 300 may be greatly improved.

The above wireless power transmission system has described power transmission by the resonance frequency method.

The embodiment can be applied to power transmission by an electromagnetic induction method in addition to the resonance frequency method.

That is, in the embodiment, when the wireless power transmission system performs power transmission based on electromagnetic induction, the transmission resonance coil 220 included in the wireless power transmission device 200 and the reception included in the wireless power reception device 300 The resonant coil 310 may be omitted.

In wireless power transmission, the quality factor and coupling coefficient may have important meanings. That is, power transmission efficiency may have a proportional relationship with each of the quality index and the coupling factor. Therefore, as the value of at least one of the quality index and the coupling factor increases, power transmission efficiency may be improved.

The quality factor may mean an index of energy that can be accumulated in the vicinity of the wireless power transmitter 200 or the wireless power receiver 300.

The quality factor may vary depending on the operating frequency w, coil shape, dimensions, and materials. The quality index can be expressed by Equation 1 below.

[Equation 1]

Q=w*L/R

L is the inductance of the coil, and R is the resistance corresponding to the amount of power loss generated in the coil itself.

The quality factor may have a value from 0 to infinity, and as the quality index increases, power transmission efficiency between the wireless power transmitter 200 and the wireless power receiver 300 may be improved.

Coupling Coefficient refers to the degree of magnetic coupling between the transmitting side coil and the receiving side coil, and has a range of 0 to 1.

The coupling coefficient may vary depending on the relative position or distance of the transmitting side coil and the receiving side coil.

2 is an equivalent circuit diagram of a transmission induction coil according to an embodiment.

As shown in FIG. 2, the transmission induction coil 210 may be composed of an inductor L1 and a capacitor C1, and thereby a circuit having appropriate inductance and capacitance values.

The transmission induction coil 210 may be configured as an equivalent circuit having both ends of the inductor L1 connected to both ends of the capacitor C1. That is, the transmission induction coil 210 may be configured as an equivalent circuit in which the inductor L1 and the capacitor C1 are connected in parallel.

The capacitor C1 may be a variable capacitor, and impedance matching may be performed as the capacitance of the capacitor C1 is adjusted. The equivalent circuits of the transmission resonant coil 220, the reception resonant coil 310, and the reception induction coil 320 may also be the same or similar to those shown in FIG. 2, but are not limited thereto.

3 is an equivalent circuit diagram of a power source and a wireless power transmitter according to an embodiment.

As shown in FIG. 3, the transmission induction coil 210 and the transmission resonant coil 220 may be composed of inductors L1 and L2 and capacitors C1 and C2 having inductance values and capacitance values, respectively.

4 is an equivalent circuit diagram of a wireless power receiver according to an embodiment.

As illustrated in FIG. 4, the receiving resonant coil 310 and the receiving induction coil 320 may be composed of inductors L3 and L4 and capacitors C3 and C4 having inductance values and capacitance values, respectively.

The rectifying unit 330 may convert AC power received from the receiving induction coil 320 to DC power and transmit the converted DC power to the load terminal 400.

Specifically, the rectifier 330 is not shown, but may include a rectifier and a smoothing circuit. In an embodiment, the rectifier may be a silicon rectifier, and may be equivalent to a diode D1, as shown in FIG. 4, but is not limited thereto.

The rectifier may convert AC power received from the receiving induction coil 320 into DC power.

The smoothing circuit may output smooth DC power by removing the AC component included in the DC power converted by the rectifier. In the embodiment, as shown in FIG. 4, the rectifying capacitor C5 may be used as the smoothing circuit, but is not limited thereto.

The DC power transmitted from the rectifying unit 330 may be a DC voltage or a DC current, but is not limited thereto.

The load stage 400 may be any rechargeable battery or device requiring DC power. For example, the load stage 400 may mean a battery.

The wireless power receiving device 300 and the load terminal 400 may be included in the wireless terminal 5 or an electronic device.

For example, the wireless terminal 5 may be a smart phone, a tablet PC, or the like, and the electronic device may be a device that requires mouse or keyboard charging power. Accordingly, the reception resonant coil 310 and the reception induction coil 320 may have a shape suitable for the shape of the electronic device.

The wireless power transmitter 200 may exchange information with the wireless power receiver 300 using in-band or out-of-band communication.

In-band communication may refer to a communication that exchanges information between the wireless power transmitter 200 and the wireless power receiver 300 by using a signal having a frequency used for wireless power transmission. To this end, the wireless power receiver 300 may further include a switch and a resistance element, and may or may not receive power transmitted from the wireless power transmitter 200 through a switching operation of the switch. Accordingly, the wireless power transmitter 200 may detect the amount of power consumed by the wireless power transmitter 200 and recognize the on or off signal of the switch included in the wireless power receiver 300.

Specifically, the wireless power receiver 300 may change the power consumed by the wireless power transmitter 200 by changing the amount of power absorbed by the resistor using a resistance element and a switch. The wireless power transmitter 200 may detect changes in power consumption and obtain status information of the wireless power receiver 300. The switch and the resistive element can be connected in series. In an embodiment, the status information of the wireless power receiving apparatus 300 may include information about the current charging amount and the charging amount trend of the wireless power receiving apparatus 300.

More specifically, when the switch is opened, power absorbed by the resistance element becomes 0, and power consumed by the wireless power transmitter 200 is also reduced.

When the switch is short-circuited, the power absorbed by the resistance element becomes greater than 0, and power consumed by the wireless power transmitter 200 increases. When the above operation is repeated in the wireless power receiver 300, the wireless power transmitter 200 detects the power consumed by the wireless power transmitter 200 and performs digital communication with the wireless power receiver 300. Can.

The wireless power transmitter 200 may receive status information of the wireless power receiver 300 according to the above-described operation, and transmit power suitable for it.

On the contrary, it is also possible to transmit the status information of the wireless power transmitter 200 to the wireless power receiver 300 by providing a resistance element and a switch on the wireless power transmitter 200 side. In an embodiment, the status information of the wireless power transmitter 200 is the maximum amount of power that can be transmitted by the wireless power transmitter 200, and the wireless power receiver 300 that the wireless power transmitter 200 is providing power. It may include information on the number and the amount of available power of the wireless power transmitter 200.

Next, out-of-band communication will be described.

Out of band communication refers to communication that exchanges information necessary for power transmission by using a separate frequency band rather than the resonant frequency band. The out-of-band communication module is mounted on each of the wireless power transmitter 200 and the wireless power receiver 300 so that information necessary for power transmission can be exchanged between the two. The out-of-band communication module may be mounted on the power supply, but is not limited thereto. In the embodiment, the out-of-band communication module may use a short-range communication method such as Bluetooth (BlueTooth), Zigbee, wireless LAN, NFC (Near Field Communication), but is not limited thereto.

5 is a side perspective view showing a wireless terminal holder according to the embodiment, Figure 6 is a front perspective view showing a wireless terminal holder according to the embodiment.

5 and 6, the wireless terminal holder according to the embodiment may include a housing 1 and a fixing member 3.

Although the embodiment is described as being limited to a wireless terminal cradle, the cradle of the embodiment can be applied to all objects that can be mounted and charged. For example, the object may be any one that requires mounting and charging, such as a battery, an electronic device, or a home appliance, in addition to a wireless terminal.

The housing 1 may have a square shape when viewed from the front, but is not limited thereto.

The wireless terminal 5 may have a rectangular shape and a rounded corner, but is not limited thereto. Therefore, the wireless terminal 5 may have a short width and a long width.

The height h of the housing 1 is at least greater than the short width of the wireless terminal 5, and the width w of the housing 1 can be at least greater than the long width of the wireless terminal 5, but is not limited thereto.

The power source 100 and the wireless power transmitter 200 described in FIGS. 1 to 4 may be included in a wireless terminal holder.

Specifically, the power source 100 and the wireless power transmitter 200 may be mounted inside the housing 1.

In addition, the wireless power receiving device 300 and the load terminal 400 described in FIGS. 1 to 4 may be mounted on the wireless terminal 5.

Wireless power may be transmitted by the power source 100 and the wireless power transmitter 200 of the wireless terminal holder. In this case, when the wireless terminal 5 is adjacent to the wireless terminal cradle within a distance capable of receiving wireless power, provided by the wireless power transmitter 300 by the wireless power receiver 300 of the wireless terminal 5 Wireless power may be received and provided to the load terminal 400.

The load terminal 400 may be a charging element of the wireless terminal 5, for example, a battery.

The guide member 7 may be disposed opposite to the fixing member 3.

The guide member 7 may be formed on the front surface of the housing 1 facing the fixing member 3. The guide member 7 may have an inclined surface inclined by 5° or more with respect to the normal, but is not limited thereto.

Since the wireless terminal 5 is contacted face-to-face by the guide member 7 of the housing 1, the wireless terminal 5 can also be inclined at least 5° relative to the normal.

Therefore, since the wireless terminal 5 is stably maintained by the guide member 7 of the housing 1, it is not shaken.

Although not shown, an adsorption member is formed on the surface of the guide member 7 of the housing 1 in contact with the wireless terminal 5, and the wireless terminal 5 placed on the guide member 7 is more stably shaken. You can keep it.

For example, the adsorption member may be formed of a resin material or a plastic material, but is not limited thereto.

For example, a number of protrusions may be formed by embossing treatment on the surface of the adsorption member, but this is not restrictive.

In addition, in order to further secure the wireless terminal 5, the fixing member 3 may be used.

At least a portion of the fixing member 3 can basically contact the guide member 7 of the housing 1. As shown in FIG. 7, if the wireless terminal 5 is inserted between the fixing member 3 and the guide member 7 of the housing 1, the fixing member 3 is guide member 7 of the housing 1 The wireless terminal 5 may be lowered in a downward direction between the guide member 7 and the fixing member 3 of the housing 1 while being pushed away from.

8 and 9, the wireless terminal 5 may descend in the downward direction and be seated on the seating member of the housing 1.

The shape formed by the guide member 7 and the seating member 35 may correspond to a shape formed by the back and side surfaces of the wireless terminal 5. That is, when the wireless terminal 5 has a vertical shape between the rear surface and the side surface, the seating member 35 with respect to the guide member 7, specifically, the upper surface of the seating member 35 may be vertical.

Therefore, the wireless terminal 5 can be stably held and fixed without being shaken by the guide member 7 and the inclination, the seating member 35 and the fixing member 3.

As described above, wireless power is provided from the wireless power receiving device 200 mounted in the housing 1 to the wireless terminal 5 mounted on the seating member 35 of the housing 1, and mounted on the wireless terminal 5 The wireless power is received by the wireless power receiving device 300 and provided to the load terminal 400 so that the load terminal 400, that is, the battery may be charged.

If the wireless power receiver 300 is included in the battery, instead of the wireless terminal 5, the battery may be directly seated on the seating member 35 of the housing 1 to charge the wireless power.

Therefore, the embodiment can not only mount the battery itself or the wireless terminal 5 equipped with the battery, but can also charge all of them.

As described above, in order to improve power transmission efficiency between the wireless power transmitter 200 and the wireless power receiver 300, at least one of the quality index and the coupling coefficient must be increased. Various conditions can be set for this increase, but the transmitting coils 210 or 210 and 220 of the wireless power transmitter 200 and the receiving coils 320 or 310 and 320 of the wireless power receiver 300 are mutually It should face parallel.

Therefore, the transmission coils 210 or 210 and 220 of the wireless power transmission device 200 mounted inside the housing 1 may be disposed parallel to the guide member 7 of the housing 1.

10 is an exploded perspective view showing a wireless terminal holder according to an embodiment.

Referring to FIG. 10, the wireless terminal holder according to the embodiment may include a housing 1 and a fixing member 3.

The housing 1 may include a first case 33 and a second case 75 fastened to the first case 33.

The first case 33 may include a seating member 35 formed on the lower portion and a guide member 7 inclined with respect to the seating member 35.

The seating member 35 and the guide member 7 are integrally formed by molding, but are not limited thereto.

The rear surface of the wireless terminal 5 is reclined by the guide member 7, and the side surface of the wireless terminal 5 can be seated on the seating member 35.

The cushioning member 45 may be disposed on the seating member 35. That is, the cushioning member 45 may be attached to the upper surface of the seating member 35. When the wireless terminal 5 is seated, the shock absorbing member 45 may prevent the wireless terminal 5 from slipping and prevent the wireless terminal 5 from shaking.

The buffer member 45 may be formed of a resin material such as epoxy having elasticity or a rubber material, but is not limited thereto.

A plurality of grooves may be formed on the upper surface of the shock absorbing member 45 in one direction, for example, but is not limited thereto. The fluctuation of the wireless terminal 5 can be further suppressed by such a groove or protrusion.

The shock absorbing member 45 may have a shape corresponding to the shape of the upper surface of the seating member 35, but is not limited thereto.

The center of the seating member 35 may include a first recess 37. The first recess 37 may have a fine shape in a direction close to the guide member 7 from one side of the seating member 35.

The seating member 35 may include second and third recesses 42 and 43 formed on both sides of the first recess 37. The second and third recesses 42 and 43 may have a fine shape from top to bottom.

The seating member 35 includes first sidewalls 81 disposed on the first recesses 37 and the second recesses 42 and first sidewalls 81 and the third recesses 43 and the third recesses 43. It may include two side walls (83). First and second holes 39 and 41 may be formed in the first and second sidewalls 81 and 83, respectively. The first recess 37 and the second and third recesses 42 and 43 may be connected by the first and second holes 39 and 41 of the first and second holes 39 and 41.

The center of the cushioning member 45 may also have a recess of the same shape as the first recess 37 of the seating member 35.

By attaching the cushioning member 45 to the seating member 35, the upper portions of the second and third recesses 42 and 43 of the seating member 35 may be blocked.

The fixing member 3 may be connected to the seating member 35 and rotated.

The fixing member 3 may include first and second supports 11 and 13, first and second rotation shafts 19 and 21, a pressing portion 25 and a lead-in portion 27.

The pressing portion 25 may be formed to extend from the first and second supports 11 and 13. In other words, the first and second supports 11 and 13 may be branched and extended from the pressing portion 25. Therefore, the opening 30 may be formed by the pressing portion 25 and the first and second supports 11 and 13.

For example, the first and second supports 11 and 13 that are branched from the pressing portion 25 may be formed to move away from each other toward each other in the downward direction and then to be closer to each other. With this shape, the force of the fixing member 3 is collected as much as possible and transmitted to the wireless terminal 5 to securely fix the wireless terminal 5, and the pressing portion 25 and the first and second supports 11 and 13 ), the area in contact with the wireless terminal 5 is maximized, so that the wireless terminal 5 can be stably fixed.

The distance between the lower portion of the first support 11 and the lower portion of the second support 13 may be smaller than the diameter of the opening 30.

The distance between the lower portion of the first support 11 and the lower portion of the second support 13 is the width of the first recess 37 of the seating member 35, that is, between the first and second side walls 81, 83. It can be smaller than the gap. Accordingly, the first and second connecting members 15 and 17 formed from the lower portion of the first support 11 and the lower portion of the second support 13 are provided with first and second side walls 81 of the seating member 35. , 83) may be inserted into the first recess 37.

The first and second connecting members 15 and 17 may extend from the first and second supports 11 and 13 toward the guide member 7.

The first and second connecting members 15 and 17 may serve to connect the first and second rotating shafts 19 and 21 to the first and second connecting members 15 and 17, respectively. That is, the first connecting member 15 may be formed to extend from the first support 11, and the first rotational shaft 19 may be formed to extend from the first connecting member 15. The second connecting member 17 may be formed to extend from the second support 13, and the second rotation shaft 21 may be formed to extend from the second connecting member 17.

Each of the first and second rotation shafts 19 and 21 may be formed to extend in a direction away from each other from one end of the first and second connecting members 15 and 17. For example, the first rotating shaft 19 is formed to extend in the left direction when the guide member 7 is viewed from the front end of the first connecting member 15, and the second rotating shaft 21 is the second connecting member 17 It can be formed extending from one end of the right direction.

The first rotation shaft 19 may extend through the first hole 39 formed in the first side wall 81 of the seating member 35 and extend into the second recess 42. The second rotation shaft 21 may extend through the second hole 41 formed in the second side wall 83 of the seating member 35 and extend into the third recess 43.

First and second contact portions 23 may be formed to extend from the first and second rotation shafts 19 and 21 respectively. Each of the first and second contact portions 23 may be softly formed downward from one end of the first and second rotation shafts 19 and 21, but is not limited thereto.

The first and second contact portions 23 are in contact with the first and second elastic members 28 and 29, and are always subjected to restoring force by the first and second elastic members 28 and 29 to guide the member 7 Trying to get away from it.

The first and second elastic members 28 and 29 may be spring, but are not limited thereto.

When the first and second contact portions 23 are moved away from the guide member 7 by the restoring force and the first and second rotation shafts 19 and 21 are rotated clockwise, the first and second rotation shafts 19, The first and second supports 11 and 13, the pressing portion 25 and the inlet portion 27 connected to the 21) are opposite to the first and second contact portions 23, that is, the direction closer to the guide member 7 Can be moved to.

If the wireless terminal 5 is inserted between the guide member 7 and the lead-in part 27, the lead-in part 27 can be moved away from the guide member 7 by the wireless terminal 5. When the first and second rotation shafts 19 and 21 are rotated counterclockwise by the movement of the inlet 27, the first and second contact portions 23 connected to the first and second rotation shafts 19 and 21 ) Is forcibly moved in a direction close to the guide member 7 so that the first and second elastic members 28 and 29 can be compressed by the first and second contact portions 23, respectively. However, since the restoring force by the first and second elastic members 28 and 29 is still applied to the first and second contact portions 23, the first and second rotation shafts 19 and 21 attempt to rotate clockwise. Force is generated, and this rotational force is transmitted to the first and second supports 11 and 13, the pressing portion 25 and the inlet portion 27 as it is, and the first and second supports 11 and 13 and the pressing portion ( 25) and the inlet portion 27, in particular, the pressing portion 25 presses a part of the upper surface of the wireless terminal 5, and this pressing state can be continued until the wireless terminal 5 is detached from the housing 1. have.

The lead-in portion 27 is disposed to face the guide member 7 but may be formed to move away from the guide member 7 as it goes upward. In other words, the inlet portion 27 may be formed to extend from the pressing portion 25 and bend in a direction away from the guide member 7.

The fixing member 3 may include a shock absorbing member 31 to prevent scratches that may occur when contacting the wireless terminal 5.

The shock absorbing member 31 can be attached on the inner side of the fixing member 3. Specifically, the cushioning member 31 may be attached on at least the inner side of the pressing portion 25. More specifically, the shock absorbing member 31 may be attached to the entire region of the pressing portion 25 and a portion of the inlet portion 27.

The shock absorbing member 31 may include one of a resin material, a rubber material, and a plastic material, but is not limited thereto.

The printed circuit board 65, the heat sink 61, and the transmission coils 210 or 210 and 220 may be disposed between the first and second cases 33 and 75.

An electronic device 69 such as a power source 100 and a control unit may be mounted on the printed circuit board 65.

The electronic device 69 may be disposed on the rear surface of the printed circuit board 65 so as to face the inner surface of the second case 75. By disposing the electronic element 69 in this way, it is possible to minimize the influence of the magnetic field generated by the transmitting coils 210 or 210 and 220. In addition, by disposing the electronic element 69 in this way, the heat sink 61 and the printed circuit board 65 are brought into direct contact, generated in the transmission coils 210 or 210 and 220, and transferred to the heat sink 61. The heat dissipation efficiency may be improved by transferring the transferred heat to the printed circuit board 65.

The wireless power transmission apparatus 200 may be configured by the control unit and the transmission coils 210 or 210 and 220. The power source 100 may be included in the wireless power transmitter 200.

The control unit may serve to control overall wireless power transmission. For example, the amount of wireless power to be transmitted to the wireless power receiving device 300 provided in the wireless terminal 5 is adjusted, or a subsequent action is processed based on the charging state information of the wireless power receiving device 300 or the wireless power transmitting device 200 ) And the wireless power receiver 300 may be controlled, but this is not restrictive.

The printed circuit board 65 may include at least one opening 67. For example, the opening 67 may be formed in the center of the printed circuit board 65, but is not limited thereto.

The size of the opening 67 may be the same as or larger than the size of the protruding member 77 of the second case 75, which will be described later, but is not limited thereto. The size of the opening 67 may vary depending on the size of the protruding member 77.

The opening 67 may have a quadrangular shape, but is not limited thereto.

At least one opening 67 formed in the printed circuit board 65 may have different sizes and/or shapes.

The electronic device 69 may be mounted on the printed circuit board 65 except for the opening 67.

The connector 63 may be connected to one side of the printed circuit board 65. The connector 63 may provide a signal transmitted from the outside to the electronic device 69 or a signal from the electronic device 69 to the outside.

The transmitting coils 210 or 210 and 220 may be disposed on the upper surface of the printed circuit board 65. The transmitting coils 210 or 210 and 220 may generate wireless power and transmit it to the wireless terminal 5. As described above, the wireless power transmission method may include an electromagnetic induction method and a resonance frequency method.

A magnetic substrate 59 may be disposed between the printed circuit board 65 and the transmitting coils 210 or 210 and 220. The magnetic substrate 59 may include a magnetic material such as ferrite, but is not limited thereto.

The magnetic substrate 59 may be made of a magnetic material by itself, or may include a substrate and a magnetic body disposed on the substrate.

The magnetic substrate 59 may prevent the magnetic field generated by the transmitting coils 210 or 210 and 220 from affecting the electronic device.

The transmitting coils 210 or 210 and 220 may be attached on the magnetic substrate 59. For example, a magnetic material is attached to the substrate, a transmitting coil 210 or 210 and 220 are attached to the magnetic material, and an insulating layer may be formed on the transmitting coil 210 or 210 and 220, but is not limited thereto. .

Heat is generated because a current flows through the transmitting coils 210 or 210 and 220. If the heat is not rapidly dissipated, the magnetic fields induced by the transmitting coils 210 or 210 and 220 are affected, and ultimately, power transmission efficiency may be reduced.

In order to solve this problem, a heatsink 61 may be disposed between the printed circuit board 65 and the magnetic substrate 59. The magnetic substrate 59, the heat sink 61, and the printed circuit board 65 may be fastened in a batch, but are not limited thereto. For example, at least one screw may be fastened to the printed circuit board 65 through the magnetic substrate 59 and the heat sink 61.

The heat sink 61 may be formed of, for example, anodized aluminum, but is not limited thereto.

The magnetic substrate 59 may contact the upper surface of the heat sink 61, and the printed circuit board 65 may contact the lower surface of the heat sink 61.

The heat generated by the transmission coils 210 or 210 and 220 by the heat sink 61 can be quickly transferred to the printed circuit board 65.

In this case, when the heat transferred to the printed circuit board 65 is not quickly discharged to the outside, the electronic device 69 mounted on the printed circuit board 65 may be affected.

To this end, at least one heat dissipation pad 73 may be disposed between the electronic device 69 and the inner surface of the second case 75. That is, adhesive materials are formed on both sides of the heat dissipation pad 73, and the electronic device 69 is attached to one surface of the heat dissipation pad 73 by the adhesive material, and the other surface is attached to the inner surface of the second case 75. Can be. Accordingly, the heat transferred to the printed circuit board 65 may be transferred to the second case 75 through the electronic element 69 and the heat dissipation pad 73 to be discharged to the outside.

Nevertheless, when the charging operation is performed for a long time, a limit may be generated in discharging heat generated from the transmission coils 210 or 210 and 220 from the printed circuit board 65 to the outside through the heat dissipation pad 73. Can be.

To solve this problem, the second case 75 may be in contact with the heat sink (61).

The second case 75 may include a protruding member 77 protruding in an inner direction, that is, in a direction in which the guide member 7 is proximate. The second case 75 may be formed to protrude toward the first case 33. The protruding member 77 may be formed on the printed circuit board 65 corresponding to the opening formed in the printed circuit board 65. For example, since the opening 67 is formed in the center of the printed circuit board 65, the protruding member 77 may also be formed in the center of the second case 75.

The thickness of the protruding member 77 may be set by comprehensively considering the thickness of the printed circuit board 65, the thickness of the electronic device 69, and the thickness of the margin margin.

A heat dissipation plate 79 may be disposed on the upper surface of the protruding member 77. Alternatively, the upper surface of the protruding member 77 includes an opening (not shown), and heat dissipation play may be installed in the opening.

The upper surface of the protruding member 77 may penetrate the opening 67 of the printed circuit board 65 and contact the back surface of the heat sink 61.

The heat dissipation plate 79 disposed on the protruding member 77 may penetrate the opening 67 of the printed circuit board 65 and contact the back surface of the heat sink 61.

A heat dissipation pad 71 may be disposed between the heat dissipation plate 79 and the heat sink 61 to enhance the contact force between the heat dissipation plate 79 and the heat sink 61 and improve heat dissipation efficiency. That is, the heat sink 61 can stably contact the heat radiation plate 79 of the protruding member 77 by the heat radiation pad 71. The heat sink 61 is not separated from the heat radiating plate 79 of the protruding member 77 by the heat radiating pad 71.

Accordingly, heat generated from the transmission coils 210 or 210 and 220 is transferred to the heat sink 61, and the heat transferred to the heat sink 61 is printed circuit board 65, electronic device 69 and heat dissipation pad. It can be transferred to the second case 75 through (73).

In addition, heat transferred to the heat sink 61 may be transferred to the heat dissipation plate 79 disposed on the protruding member 77 of the second case 75 through the heat dissipation pad 71.

The heat transfer path is summarized as follows.

(1) Transmitting coil (210 or 210 and 220) --> magnetic substrate (59) --> heat sink (61) --> printed circuit board (65) --> electronic device (69) --> heat dissipation pad (73) --> Second case (75)

(2) Transmit coil (210 or 210 and 220) --> magnetic substrate (59) --> heat sink (61) --> heat dissipation pad (71) --> heat dissipation plate (79)

As described above, since the heat of the transmitting coils 210 or 210 and 220 is radiated through two paths, the heat dissipation efficiency can be maximized. Due to the maximization of the heat dissipation efficiency, a magnetic field is stably generated in the transmission coils 210 or 210 and 220, and power transmission efficiency can be improved.

The first case 33 and the second case 75 may be fastened using at least one screw. That is, at least one screw 49 may be fastened to the second case 75 through the fastening hole 47 of the first case 33.

The first and second elastic members 28 and 29 can be fixed in the second and third recesses 42 and 43 of the seating member 35 by the elastic member fastening member 51. The first and second elastic members 28 and 29 may be fixed to the first and second regions of the elastic member fastening member 51. The elastic member fastening member 51 may be fastened to the seating member 35 by at least one screw 55 passing through the fastening hole 53.

The elastic member fastening member 51 may be detachably attached to the seating member 35. The first and second elastic members 28 and 29 may be replaced as necessary by the detachment.

The wireless power receiver 400 according to the embodiment is mobile, a smart phone, a laptop computer, a terminal for digital broadcasting, PDA (Personal Digital Assistants), PMP (Portable Multimedia Player), navigation, etc. It can be mounted on a terminal.

However, those skilled in the art will readily appreciate that the configuration according to the embodiment may also be applied to a fixed terminal such as a digital TV, a desktop computer, etc., except when applicable only to a mobile terminal.

In the embodiment, the method of transmitting power by electromagnetic induction means that the Q value is relatively low, and tight coupling means, and the method of transmitting power by resonance has a relatively high Q value and loose coupling. It can mean a loosely coupling.

Although the preferred embodiments have been illustrated and described above, the technical spirit of the present invention is not limited to the specific embodiments described above, and is usually in the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims. It is of course possible to perform various modifications by a person having knowledge of, and these modifications should not be individually understood from the technical idea or prospect of the present invention.

1: housing 3: fixing member
5: Wireless terminal 7: No guide
11, 13: support 15, 17: connecting member
19, 21: rotating shaft 23: contact
25: pressing part 27: lead-in part
28, 29: elastic member 30: opening
31, 45: cushioning member 33: first case
35: seating member 37, 42, 43: recess
39, 41: hole 47, 53: fastening hole
49, 55: screw 51: elastic member fastening member
59: magnetic substrate 61: heat sink
63: connector 65: printed circuit board
67: opening 69: electronic device
71, 73: heat dissipation pad 75: second case
77: protruding member 79: heat dissipation plate
100: power supply 200: wireless power transmitter
210: transmission induction coil 220: transmission resonance coil
300: wireless power receiver 310: receiving resonance coil
320: receiving induction coil 330: rectifier
400: load stage

Claims (13)

A housing including a transmitting coil for transmitting power wirelessly;
A fixing member disposed facing the side of the housing and fixing the wireless terminal when the wireless terminal is supported;
And a seating member disposed between the housing and the fixing member,
The side surface of the housing is disposed facing the transmitting coil to support the wireless terminal in an erected state,
The fixing member includes a first support, a second support and a pressing portion,
The first and second supports are branched from the pressing portion in a downward direction,
The first and second supports are arranged to be spaced apart from each other at regular intervals toward the lower direction so that an opening is formed between the first and second supports,
The diameter of the opening between the first support and the second support has a first value,
The distance between the lower portion of the first support and the lower portion of the second support has a second value less than the first value,
The pressing part contacts the wireless terminal when the wireless terminal is supported,
The seating member includes a first recess having a recessed shape from one side of the seating member toward the side of the housing so that a portion of the wireless terminal is exposed when the wireless terminal is supported,
The opening is connected to the first recess,
The width of the first recess is smaller than the diameter of the opening.
According to claim 1,
The seating member is a cradle including a second recess having a fine shape in a downward direction from one side of the first recess.
According to claim 1,
The fixing member is a cradle extending from the pressing portion and includes an inlet portion formed to be bent in a direction away from the side surface of the housing.
According to claim 1,
The fixing member has a restoring force with respect to the side surface of the housing.
According to claim 1,
The height of the fixing member is less than the height of the side surface of the housing.
According to claim 1,
The width of the fixing member is less than the width of the side surface of the housing.
According to claim 1,
The fixing member is moved to move away from or closer to the side of the housing by the rotational movement of the rotating shaft.
According to claim 1,
The side surface of the housing is a cradle including a guide member having an inclined surface to support the wireless terminal in an inclined state.
The method of claim 8,
The inclined surface is a cradle inclined by 5° or more with respect to the normal.
According to claim 1,
When the wireless terminal is supported, a part of the wireless terminal contacting the pressing portion is exposed by the opening.
According to claim 3,
When the wireless terminal is supported, a part of the wireless terminal contacting the pressing part is exposed by the inlet.
According to claim 1,
The upper part of the first support and the upper part of the second support are connected to each other. delete

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