CN106300573A - Flexible winding wireless charging device - Google Patents

Abstract

The invention relates to a flexible winding wireless charging device which comprises a first component, a second component, a flexible wireless charging film and a circuit board, wherein the flexible wireless charging film is provided with a first side end and a second side end, the first side end is fixedly connected with the first component, the second side end is fixedly connected with the second component, the flexible wireless charging film can be wound in the first component, and the circuit board is electrically connected with the flexible wireless charging film and is arranged in the second component. When the second component moves towards the direction far away from the first component, the flexible wireless charging film is unfolded and arranged so as to be used for one or more power receiving devices to carry out wireless charging; and when the second component displaces towards the direction of the first component, the flexible wireless charging film is wound and stored in the first component.

Description

Flexible and retractable wireless charging device

technical field

The invention relates to a charging device, in particular to a flexible and retractable wireless charging device.

Background technique

Various portable electronic devices such as mobile phones and tablet computers have been widely used in daily life. In order to provide the power required for the operation of portable electronic devices, a charger must be used to charge their internal batteries. Since the wireless charging device is applicable to various usage environments and is not limited by the power cord, it is convenient for users to perform charging applications, so the wireless charging device has been gradually developed to replace the use of wired chargers.

Wireless charging, also known as inductive charging or non-contact charging, provides energy from a power supply device to a power receiving device wirelessly. At present, wireless charging technology is generally divided into three camps, WPC (Wireless Power Consortium) (QI), PMA (Power Matters Alliance), and A4WP (Alliance For Wireless Power), among which WPC, A4WP The alliance is the mainstream, and the wireless charging methods used include magnetic induction (low frequency) and magnetic resonance (high frequency). The magnetic induction method can only be used for short-distance transmission and the power receiving device needs to be attached to the power supply device in alignment. Its power conversion efficiency is high, but it is difficult to realize simultaneous charging of multiple power receiving devices. Magnetic resonance is to let the sending end and the receiving end reach a specific resonance frequency, allowing both parties to form a magnetic resonance phenomenon, and achieve the purpose of energy transmission through electromagnetic waves. Compared with the magnetic induction method, the magnetic resonance method can realize longer-distance charging.

FIG. 1 shows a schematic diagram of a conventional wireless charging device wirelessly charging a power receiving device. As shown in Figure 1, the wireless charging device 11 transmits energy to the power receiving device 12 wirelessly, wherein the coil element of the wireless charging device 11 usually adopts a copper foil coil and the copper foil coil is arranged on a hard substrate and mounted on a Therefore, the existing wireless charging devices cannot freely expand and deform according to the usage requirements and the charging environment, and usually can only charge the receiving device on one side of the wireless charging device, which will limit the charging application and reduce its convenience. In addition, the existing wireless charging device is not easy to store and carry, especially when charging a power receiving device with a large area, the wireless charging device also needs to be large in size, heavy in weight and difficult to carry.

In addition, due to the different technologies adopted by the existing wireless charging devices, the coupling frequency of the coil components and the circuit design of the transmitting end are also different, resulting in incompatible specifications of the products and the inability to share components. Due to incompatible factors, wireless charging devices cannot use the same coil components and circuit components, so that various portable electronic devices need to use various customized wireless charging devices, which reduces the advantages and disadvantages of wireless charging devices. Versatility, and a single wireless charging device cannot wirelessly charge multiple power receiving devices using different wireless charging technologies at the same time.

Contents of the invention

The purpose of the present invention is to provide a flexible and rollable wireless charging device, which has a flexible and thin charging film, and is easy to roll, store and carry, can increase the flexibility and convenience of wireless charging applications, and save space.

Another object of the present invention is to provide a flexible and retractable wireless charging device, which can avoid possible disconnection of the wires between the coil element and the circuit board after multiple retracting operations, thereby extending the length of the wireless charging device. service life.

Another object of the present invention is to provide a flexible and retractable wireless charging device capable of emitting more than one electromagnetic wave of different frequencies, which can simultaneously or time-divisionally receive one or more electromagnetic waves of the same frequency or different frequencies. The power receiving device can be charged, and can be adaptively or selectively switched to use magnetic resonance coupling or magnetic induction to realize wireless charging.

To achieve the above purpose, a preferred embodiment of the present invention is to provide a flexible and retractable wireless charging device, which includes a first component, a second component, a flexible wireless charging film and a circuit board. The first component has a first accommodating space. The second component has a second accommodating space. The flexible wireless charging film has a first side end and a second side end, the first side end is fixedly connected to the first part, the second side end is fixedly connected to the second part, and the flexible wireless charging film can be rolled up and stored in the The first accommodating space of the first component. The circuit board is electrically connected with the flexible wireless charging film, and is arranged in the second accommodating space of the second component. Wherein, when the second component is displaced in a direction away from the first component, the flexible wireless charging film is deployed for charging by one or more power receiving devices; and when the second component is displaced in a direction away from the first component, The flexible wireless charging film is rolled and stored in the first accommodating space of the first component.

According to an embodiment of the present invention, the flexible wireless charging film is electrically connected to the circuit board through a wire, and the wire is disposed in the second accommodating space of the second component.

According to another embodiment of the present invention, the first component includes: a first housing with the first accommodating space and a slot, wherein the flexible wireless charging film passes through the slot; and a retractable The mechanism is arranged in the first accommodating space and includes a rotating shaft, wherein the first side end of the flexible wireless charging film is fixedly connected to the rotating shaft, and the rotating shaft frame is configured to roll up the flexible wireless charging film.

According to another embodiment of the present invention, the retracting mechanism further includes an adjustment mechanism connected with the rotating shaft to adjust the number of rotations and the positioning angle of the rotating shaft.

According to another embodiment of the present invention, the adjusting mechanism is a torque adjusting mechanism, which interacts with the rotating shaft to provide a restoring torque on the rotating shaft, so that the wireless charging film can be automatically rolled up on the rotating shaft.

According to another embodiment of the present invention, the second component includes a second casing, the second casing has the second accommodating space and a long slot, wherein the second side end of the flexible wireless charging film Fixedly connected to the slot.

According to another embodiment of the present invention, the flexible wireless charging film includes at least one set of transmitting film coil components, and the circuit board includes at least one set of transmitting modules, wherein the transmitting film coil components are electrically connected to the transmitting film set to receive the An AC signal of the transmitting module, and the transmitting thin-film coil element transmits electromagnetic waves of a specific frequency or a plurality of different frequencies, so as to wirelessly charge the one or more receiving devices.

According to another embodiment of the present invention, the emitting thin film coil element includes: a flexible substrate having a first surface and a second surface, wherein the first surface is opposite to the second surface; a vibrating antenna is disposed on the flexible substrate. The first surface of the substrate; a resonant antenna disposed on the second surface of the flexible substrate, wherein both ends of the resonant antenna are connected to one or more capacitors, and the resonant antenna is coupled with the vibrating antenna to emit The electromagnetic wave of the specific frequency; a first protective layer covering the vibrating antenna; and a second protective layer covering the resonant antenna.

According to another embodiment of the present invention, the transmitting thin film coil element further includes a shielding element disposed between the vibrating antenna and the first protective layer, or disposed on an outer side of the first protective layer, wherein the shielding The element includes a metal grid film, a magnetic permeable film or a combination thereof.

According to another embodiment of the present invention, the transmitting module includes: a power conversion circuit electrically connected to a power supply and converting the electric energy provided by the power supply; an oscillator connected to the power conversion circuit and outputting a The AC signal of a specific frequency; a power amplifier connected to the oscillator and the power conversion circuit and configured to amplify the AC signal; and a filter circuit connected to the power amplifier and configured to filter the AC signal.

According to another embodiment of the present invention, the circuit board further includes a controller configured to control the flexible and retractable wireless charging device to wirelessly charge the receiving device by magnetic resonance or magnetic induction.

According to another embodiment of the present invention, the flexible wireless charging film includes a first surface and a second surface, and the one or more power receiving devices can be placed on the first surface or the second surface for wireless charging.

Description of drawings

FIG. 1 shows a schematic diagram of a conventional wireless charging device wirelessly charging a power receiving device.

FIG. 2A is a schematic diagram of the structure of the wireless charging system of the present invention.

FIG. 2B is a schematic structural diagram of another variation example of the wireless charging system of the present invention.

3A is a schematic diagram of the flexible and retractable wireless charging device of the present invention in a storage state.

3B is a schematic diagram of the flexible and retractable wireless charging device in use according to the present invention.

FIG. 4 is a schematic structural diagram of the flexible and retractable wireless charging device shown in FIG. 3 .

FIG. 5A is a schematic structural diagram of the transmitting thin film coil element shown in FIG. 4 .

FIG. 5B is a schematic structural diagram of another modification example of the transmitting thin film coil element shown in FIG. 4 .

FIG. 5C is a schematic structural diagram of another modification example of the transmitting thin film coil element shown in FIG. 4 .

FIG. 6 is a schematic structural diagram of an example of the shielding element shown in FIG. 5B .

FIG. 7 is a circuit block diagram of a transmitter module of the flexible and retractable wireless charging device shown in FIG. 2 .

FIG. 8 is a circuit block diagram of a receiving module of the power receiving device shown in FIG. 2 .

FIG. 9 shows a schematic structural diagram of an example of the power receiving device in FIG. 2 . FIG. 10 is a schematic circuit block diagram of a variation example of the wireless charging system of the present invention.

【Symbol Description】

11: Wireless charging device

12: Power receiving device

2: Wireless charging system

3: Flexible and retractable wireless charging device (referred to as wireless charging device)

4, 4': receiving device

5: Power

30: Flexible wireless charging film

31: Transmitting film coil element

32: Launch module

33: first part

34: Second part

35: circuit board

36: Controller

37: The first switching circuit

38: Second switching circuit

39: wire

30a: First side

30b: second side

30c: first side end

30d: Second side end

311: flexible substrate

312: Vibrating antenna

313: Resonant Antenna

314: First protective layer

315: Second protective layer

316: Capacitor

317: shielding element

311a: the first side of the flexible substrate

311b: the second side of the flexible substrate

311c: perforation

313a: first end

313b: second end

3171: grid cell

3172, 3173: metal microwire

321: Power conversion circuit

322: Oscillator

323: Power Amplifier

324: filter circuit

331: First Shell

332: retracting mechanism

333: First Storage Space

334, 335: side cover

336: slotting

337: Shaft

338: Adjustment Mechanism

341: second shell

342: long slot

343: Second Storage Space

4a, 4a’: Wireless charging receiver

4b, 4b': load

41, 41': Receiving film coil components

42, 42': receiving module

43: Connector

421: filter circuit

422: rectifier circuit

423: voltage regulator circuit

424: DC voltage regulation circuit

C11, C12: first capacitor

C21, C22: second capacitor

S11, S12: first switching element

S21, S22: second switching element

d: Spacing

F: Direction

A, B: position

detailed description

Some typical embodiments embodying the features and advantages of the present invention will be described in detail in the description in the following paragraphs. It should be understood that the present invention is capable of various changes in different ways without departing from the scope of the present invention, and that the description and drawings therein are illustrative in nature rather than limiting the present invention.

2A is a schematic diagram of the structure of the wireless charging system of the present invention, and FIG. 2B is a schematic diagram of the structure of another variation of the wireless charging system of the present invention. Schematic diagrams of the stored state and the used state, and FIG. 4 is a schematic structural diagram of the flexible and retractable wireless charging device of the present invention. As shown in Figures 2A, 2B, 3A, 3B and 4, the wireless charging system 2 of the present invention includes a flexible and retractable wireless charging device 3 (hereinafter referred to as the wireless charging device 3) and at least one power receiving device 4, wherein the wireless charging The device 3 is connected to a power source 5 (such as but not limited to AC mains, or an external or built-in battery unit), and can emit specific (single) frequency or broadband (multiple different frequencies) electromagnetic waves (such as but not limited to limited to electromagnetic waves with a frequency range between 60 Hz and 300 GHz), to use magnetic resonance (high frequency) or magnetic induction (low frequency) to control one or more receiving devices 4 that can receive electromagnetic waves of the same frequency or different frequencies (such as but not limited to mobile phones) , tablet) to achieve wireless charging.

As shown in Figures 3A, 3B and 4, the wireless charging device 3 of the present invention includes a flexible wireless charging film 30, a first component 33, a second component 34 and a circuit board 35, wherein the flexible wireless charging film 30 includes at least one set The transmitting film coil element 31, and the flexible wireless charging film 30 has a first surface 30a, a second surface 30b, a first side end 30c and a second side end 30d, the first side 30a is opposite to the second surface 30b, and the first side End 30c is opposite to second side end 30d. The first side end 30c is fixedly connected to the first part 33, the second side end 30d is fixedly connected to the second part 34, the flexible wireless charging film 30 can be rolled up in the first part 33, and the flexible wireless charging film 30 and The circuit board 35 is electrically connected by wires 39 , and the circuit board 35 and the wires 39 are disposed in the second component 34 . When the wireless charging device 3 is in use, the second part 34 is displaced in the direction F away from the first part 33 due to the force exerted by the user (that is, from position A to position B), and at this time the flexible wireless charging film 30 can be By stretching and unfolding, one or more power receiving devices 4 located on the first surface 30a and/or the second surface 30b of the flexible wireless charging film 30 can perform wireless charging operations. When the wireless charging device 3 is in the stored state, the second part 34 is displaced toward the first part 33 (that is, from position B to position A), and the flexible wireless charging film 30 is rolled up and stored in the first part 33 , thereby making the wireless charging device 3 easy to store and carry.

Please refer to FIGS. 3A, 3B and 4 again. The first part 33 of the wireless charging device 3 of the present invention has a first housing 331 and a retracting mechanism 332. In this embodiment, the first housing 331 can be but not limited to It is a square hollow shell structure and has a first accommodating space 333 for accommodating the retracting mechanism 332 therein. Side covers 334 and 335 may be provided on both sides of the first housing 331 to close the two sides of the first housing 331 , but not limited thereto. Also in this embodiment, although the first housing 331 is a square housing structure, it is not a closed housing structure, and has a slot 336 on one side thereof for the flexible wireless charging film 30 to pass through. set up.

The retracting mechanism 332 mainly includes a rotating shaft 337 and an adjusting mechanism 338. The rotating shaft 337 and the adjusting mechanism 338 are arranged in the first accommodation space 333 of the first housing 331 and are connected to each other. The first side of the flexible wireless charging film 30 The end 30c passes through the slot 336 of the first housing 331 and is fixedly connected to the rotating shaft 337. The rotating shaft 337 is for the flexible wireless charging film 30 to be wound on it, and the adjusting mechanism 338 is used to adjust the number of turns and the positioning of the rotating shaft 337. angle. In some embodiments, the adjustment mechanism 338 can be but not limited to a torque adjustment mechanism. When the user exerts force to move the first part 33 and the second part 34 away, the second part 34 drives the flexible wireless charging film 30 from the first The slot 336 of a part 33 releases and makes the rotating shaft 337 rotate correspondingly (for example, clockwise), and after the user stops applying force, the adjustment mechanism 338 interacts with the rotating shaft 337 to stop the rotating shaft 337 and position it at A specific angle, and a torque is stored between the adjustment mechanism 338 and the rotating shaft 337, so that the flexible wireless charging film 30 wound on the rotating shaft 337 can be unfolded according to the force of the user's stretching, and can be used according to the actual use. It is necessary to adjust the stretched length of the flexible wireless charging film 30 . When the flexible wireless charging film 30 is to be stored, the user can apply a little force to further separate the second part 34 from the first part 33, so that the adjustment mechanism 338 no longer restricts the rotation of the rotating shaft 337. At this time, the adjustment mechanism 338 and the rotating shaft The torque stored between 337 is released, so that the rotating shaft 337 can rotate in the opposite direction (for example, counterclockwise) due to the restoring torque, so that the flexible wireless charging film 30 can be automatically wound around the rotating shaft stored in the first part 33 337, and the first component 33 and the second component 34 return to the state of being in contact. In some embodiments, the adjustment mechanism 338 may include components such as springs, reeds and gears, but is not limited thereto. It should be noted that the structure of the adjustment mechanism 338 is not limited to the foregoing embodiments, and can be changed according to actual needs.

In this embodiment, the second component 34 includes a second casing 341 , and the second casing 341 has a long slot 342 and a second accommodating space 343 . The second side end 31d of the flexible wireless charging film 31 is fixedly connected to the slot 342 of the second casing 341 . The circuit board 35 includes at least one set of transmitting modules 32 , and the transmitting modules 32 of the circuit board 35 are electrically connected to the transmitting film coil element 31 of the flexible wireless charging film 31 through wires 39 . In this embodiment, the wire 39 can be a power wire or a conductive wire. The circuit board 35 is fixed in the second accommodating space 343 of the second housing 341, and the wire 39 is also arranged in the second accommodating space 343 of the second housing 341, so that the circuit board 35 and the wire 39 can be received. The second casing 341 protects and prevents the wire 39 from being disconnected after multiple retracting operations.

In some embodiments, as shown in FIG. 2A , the flexible and retractable wireless charging device 3 includes a set of transmitting thin film coil elements 31 and a set of transmitting modules 32 , which can transmit electromagnetic waves of a specific frequency to charge the receiving device 4 . Wireless charging, wherein the transmitting film coil element 31 is disposed on the flexible wireless charging film 30 , and the transmitting module 32 is disposed on the circuit board 35 (as shown in FIG. 4 ). In other embodiments, as shown in FIG. 2B , the flexible and retractable wireless charging device 3 includes multiple sets of transmitting thin film coil elements 31 and multiple sets of transmitting modules 32 , wherein each set of transmitting thin film coil elements 31 is electrically connected to A corresponding transmitting module 32 , whereby electromagnetic waves of a specific frequency or multiple different frequencies can be transmitted to wirelessly charge one or more receiving devices 4 capable of receiving electromagnetic waves of the same frequency or different frequencies at the same time or in time division.

FIG. 5A is a schematic structural diagram of the transmitting thin film coil element shown in FIG. 3 . As shown in Figures 4 and 5A, the flexible wireless charging film 30 includes at least one set of transmitting film coil elements 31, and the transmitting film coil elements 31 include a flexible substrate 311, a vibrating antenna 312, a resonant antenna 313, a first protective layer 314 and a second protective layer 314. Two protective layers 315, wherein the vibrating antenna 312 and the resonant antenna 313 are arranged on two opposite surfaces of the flexible substrate 311, that is, the vibrating antenna 312 and the resonant antenna 313 are respectively arranged on the first surface 311a and the second surface 311b of the flexible substrate 311 . Two ends of the resonant antenna 313 (ie, the first end 313 a and the second end 313 b ) are connected to one or more capacitors 316 , and both ends of the vibrating antenna 312 are electrically connected to the transmitting module 32 on the circuit board 35 . In one embodiment, the first end 313 a of the resonant antenna 313 passes through the through hole 311 c of the flexible substrate 311 from the second surface 311 b of the flexible substrate 311 and leads out from the first surface 311 a of the flexible substrate 311 . The first protective layer 314 and the second protective layer 315 respectively cover the vibrating antenna 312 and the resonant antenna 313 , that is, the first protective layer 312 and the second protective layer 315 are respectively located outside the vibrating antenna 312 and the resonant antenna 313 . When the vibrating antenna 312 of the transmitting thin film coil element 31 receives an AC signal from the transmitting module 32, the vibrating antenna 312 is coupled with the resonant antenna 313, and the electromagnetic wave of a specific frequency emitted is connected to a wireless charging receiver of the power receiving device 4 4a (as shown in Figures 2A and 2B) the receiving film coil element 41 is coupled to receive the energy transmitted by the flexible wireless charging film 30 through magnetic induction or magnetic resonance, and the receiving module 42 converts the power output to the load 4b to realize The power receiving device 4 is wirelessly charged. In some embodiments, the vibrating antenna 312 and the resonant antenna 313 can be but not limited to single-loop or multi-loop antennas, and the shapes of the loops include but not limited to circle, ellipse or rectangle.

In some embodiments, the first surface 311a and the second surface 311b of the flexible substrate 311 respectively include an adhesive layer (not shown), and the vibrating antenna 312 and the resonant antenna 313 are respectively conductive materials and pass through the adhesive layer It is disposed on the first surface 311 a and the second surface 311 b of the flexible substrate 311 . The adhesive layer can be a light curing, thermal curing or other adhesive material with curing properties, wherein other adhesive materials with curing properties can be but not limited to ethylene-vinyl acetate Copolymer-based adhesives, polyamide-based adhesives, rubber-based adhesives, polyolefin-based adhesives, or moisture-curing polyurethane adhesives, etc. In some embodiments, in addition to the above-mentioned cured adhesive material, the adhesive layer may be mixed with a magnetic material, wherein the magnetic material may be, for example but not limited to, ferromagnetic powder mixed in the cured adhesive material. In other embodiments, the flexible substrate 311 can be replaced by the aforementioned adhesive layer.

In some embodiments, the material of the flexible substrate 311 may be selected from polyethylene terephthalate (PET), thin glass, polyethylene naphthalate (Polyethylenenaphthalat, PEN), polyether (Polyethersulfone , PES), polymethylmethacrylat (Polymethylmethacrylat, PMMA), polyimide (Polyimide, PI) or polycarbonate (Polycarbonate, PC), and not limited thereto. The conductive material of the vibrating antenna 312 and the resonant antenna 313 can be selected from silver (Ag), copper (Cu), gold (Au), aluminum (Al), tin (Sn) or graphene, and is not limited thereto. In some embodiments, the first protective layer 314 and the second protective layer 315 can be made of protective paint, which can be selected from epoxy resin, acrylic silicone, polyurethane glue, ethylene-vinyl acetate copolymer glue, polyester Amide-based adhesives, rubber-based adhesives, polyolefin-based adhesives, moisture-curing polyurethane adhesives, or silicone rubbers, but not limited thereto.

In another embodiment, such as a single-side charging implementation, as shown in FIG. 5B , the transmitting thin film coil element 31 may further include a shielding element 317 disposed between the vibrating antenna 312 and the first protective layer 314, so as to The structure is designed to block at least part of the electromagnetic waves from radiating away from the resonant antenna 313 (that is, outside the first protective layer 314 ), so as to increase the gain of electromagnetic waves. Alternatively, as shown in FIG. 5C, the shielding element 317 of the transmitting thin film coil element 31 can also be arranged on the outside of the first protective layer 314, so as to block at least part of the electromagnetic wave from diverging in a direction away from the resonant antenna 313, so as to improve Electromagnetic wave gain.

In some embodiments, as shown in FIG. 6 , the shielding element 317 is a metal mesh (Metal mesh) film, which can be adapted to block higher-frequency electromagnetic waves from radiating to the outside of the first protective layer 314, such as a barrier with a first specific Electromagnetic waves with a frequency above (for example, above 6 MHz) radiate outward. The metal grid film is made of metal or metal composite material, wherein the metal or metal composite material is selected from copper, gold, silver, aluminum, tungsten, chromium, titanium, indium, tin, nickel, iron or at least two or more The metal composite composed of, but not limited to. The metal grid film has a grid pattern, and the grid pattern includes a plurality of grid units 3171, wherein two adjacent but not connected metal microwires 3172, 3173 of each grid unit 3171 have a distance d, the distance d d is smaller than the wavelength of the electromagnetic wave emitted by the emitting thin film coil element 31 . In some other embodiments, the shielding element 317 is a magnetically permeable film, which can be made of ferrite, zinc-nickel ferrite (NiZn), zinc-manganese ferrite (MgZn) or sendust and aluminum alloy. The above-mentioned composition of the bonding material can be adapted to block the radiation of lower frequency electromagnetic waves to the outside of the first protective layer 314 and enhance the gain of electromagnetic waves, for example, blocking between the first specific frequency and the second specific frequency (for example, between 60 Hz to 20MHz) electromagnetic waves radiate outward. In some other embodiments, the shielding element 317 is a composite film combined with a metal grid film and a magnetic permeable film, which can block electromagnetic waves of all frequency ranges from spreading to the outside of the first protective layer 314 and increase the gain of electromagnetic waves.

FIG. 7 is a circuit block diagram of a transmitter module of the flexible and retractable wireless charging device shown in FIG. 2 . As shown in FIG. 7 , the transmitting module 32 includes a power conversion circuit 321 , an oscillator 322 , a power amplifier 323 and a filter circuit 324 . The power conversion circuit 321 is electrically connected to the power source 5 and connected to the oscillator 322 and the power amplifier 323 . The power conversion circuit 321 converts the electric energy provided by the power source 5 and supplies power to the oscillator 322 and the power amplifier 323 . In some embodiments, the power conversion circuit 321 includes a DC-DC converter, an AC-AC converter and/or a DC-AC converter. The oscillator 322 is adjustable to output an AC signal of a specific frequency, the power amplifier 323 is configured to amplify the AC signal of the specific frequency, and the filter circuit 324 is configured to filter out harmonics and unwanted frequency parts of the AC signal, thereby output to the vibrating antenna 312 of the transmitting thin film coil element 31 .

In this embodiment, as shown in Sections 2A and 2B, each power receiving device 4 includes a wireless charging receiver 4a and a load 4b, wherein the wireless charging receiver 4a and the load 4b can be structurally separable two components or Can be integrated into a single device. For example, the wireless charging receiver 4a of the power receiving device 4 can be a wireless charging receiving pad, and the load 4b can be a mobile phone without wireless charging function. By electrically connecting the wireless charging receiving pad and the mobile phone, it can be used Mobile phones without wireless charging function can realize wireless charging operation. In another embodiment, the wireless charging receiver 4a can also be integrally installed inside the casing of the load 4b (such as a mobile phone).

Please refer to FIGS. 2A and 2B again. In some embodiments, the wireless charging receiver 4a of each power receiving device 4 includes a receiving thin film coil element 41 and a receiving module 42, wherein the receiving thin film coil element 41 includes a flexible substrate and a vibrating antenna. , a resonant antenna, a first protective layer and a second protective layer, wherein two ends of the resonant antenna are connected to one or more capacitors. The structures, materials and functions of the flexible substrate, vibrating antenna, resonant antenna, first protective layer, and second protective layer of the receiving thin film coil element 41 are respectively the same as those of the flexible substrate 311, vibrating element 31 of the transmitting thin film coil element 31 shown in FIG. 5A. The structures, materials and functions of the antenna 312 , the resonant antenna 313 , the first protection layer 314 and the second protection layer 315 are the same and will not be repeated here. In this embodiment, the receiving thin film coil element 41 is structured to be coupled with the transmitting thin film coil element 31 , so as to receive the energy transmitted by the flexible wireless charging thin film 30 of the wireless charging device 3 by means of magnetic resonance or magnetic induction. In other words, when the power receiving device 4 is placed on the first surface 30a or the second surface 30b of the flexible wireless charging film 30, the transmitting film coil element 31 of the flexible wireless charging film 30 emits a higher frequency electromagnetic wave (such as but not limited to 6.78MHz) and the receiving film coil element 41 of the power receiving device 4 is the same frequency and receives the electromagnetic wave, the energy can be transmitted from the transmitting film coil element 31 of the flexible wireless charging film 30 to the wireless charging receiver by using magnetic resonance. The receiving film coil element 41 of the device 4a. In other embodiments, when the power receiving device 4 is placed on the first surface 30a or the second surface 30b of the flexible wireless charging film 30, the transmitting film coil element 31 of the flexible wireless charging film 30 emits a lower frequency electromagnetic wave ( For example but not limited to 100KHz) and when the receiving film coil element 41 of the power receiving device 4 receives the electromagnetic wave, the energy can be transmitted from the transmitting film coil element 31 of the flexible wireless charging film 30 to the receiver of the wireless charging receiver 4a by means of magnetic induction. Thin film coil element 41 .

FIG. 8 is a circuit block diagram of a receiving module of the power receiving device shown in FIG. 2 . In some embodiments, as shown in Figures 2A, 2B and 8, the wireless charging receiver 4a includes one or more sets of receiving modules 42, wherein each set of receiving modules 42 includes a filtering circuit 421, a rectifying circuit 422, a voltage stabilizing circuit 423 and a DC voltage regulating circuit 424. The filter circuit 421 is electrically connected to the resonant antenna receiving the thin film coil element 41 and filters the harmonics of the AC signal output by the resonant antenna receiving the thin film coil element 41 . The rectifying circuit 422 is electrically connected to the filter circuit 421 and the voltage stabilizing circuit 423 to convert the AC signal into a DC power. The voltage stabilizing circuit 423 is electrically connected to the rectifying circuit 422 and the DC voltage regulating circuit 424 to stabilize the DC power supply at a rated voltage. The DC voltage regulating circuit 424 is electrically connected to the voltage stabilizing circuit 423 and the load 4b, so as to adjust (for example boost) the voltage of the DC power supply to the voltage required by the load 4b, so as to supply power to the load 4b, such as charging the battery of a mobile phone.

FIG. 9 shows a schematic structural diagram of an example of the power receiving device in FIG. 2 . As shown in Figures 2A, 2B and 9, the power receiving device 4 includes a wireless charging receiver 4a and a load 4b, wherein the wireless charging receiver 4a of the power receiving device 4 can be a wireless charging receiving pad, and the load 4b can be without wireless charging feature phone. When the connector 43 of the wireless charging receiver 4a (that is, the wireless charging receiving pad) is electrically connected to the corresponding connector of the load 4b (that is, the mobile phone), the receiving film coil element 41 and the receiving module 42 of the wireless charging receiver 4a can receive The energy transmitted by the transmitting thin film coil element 31 of the wireless charging device 3 enables the mobile phone without the wireless charging function to realize wireless charging.

FIG. 10 is a schematic circuit block diagram of a variation example of the wireless charging system of the present invention. In this embodiment, the wireless charging system 2 of the present invention includes a wireless charging device 3 and one or more power receiving devices 4, 4', wherein the wireless charging device 3 can be based on the wireless charging receiver of the power receiving device 4, 4' According to the specifications and characteristics of 4a, 4a', the method of magnetic resonance or magnetic induction is adaptively or selectively switched to wirelessly charge the loads 4b, 4b' of the power receiving devices 4, 4'. In this embodiment, the wireless charging device 3 includes a flexible wireless charging film 30, a first component 33, a second component 34 and a circuit board 35, wherein the flexible wireless charging film 30 includes a transmitting film coil element 31, and the circuit board 35 has The transmitting module 32, the controller 36, the first switching circuit 37, the second switching circuit 38, a plurality of first capacitors C ₁₁ , C ₁₂ and a plurality of second capacitors C ₂₁ , C ₂₂ , wherein the transmitting thin-film coil element 31 and the transmitting The structure, function and principle of the module 32 are similar to those of the foregoing embodiments. The structures, functions and principles of the receiving thin film coil elements 41 and 41 ′ and the receiving modules 42 and 42 ′ are the same as those of the foregoing embodiments and will not be repeated here. A plurality of first capacitors C ₁₁ , C ₁₂ are respectively connected in parallel with the vibrating antenna (not shown) of the transmitting thin film coil element 31, and a plurality of first capacitors C ₁₁ , C ₁₂ are connected in parallel with each other, so as to structure and receive power. The receiving thin-film coil elements 41, 41' of the devices 4, 4' are coupled. A plurality of second capacitors C ₂₁ , C ₂₂ are respectively connected in series between the output terminal of the transmitting module 32 and the vibrating antenna (not shown) of the transmitting thin film coil element 31, and the plurality of second capacitors C ₂₁ , C ₂₂ are connected to each other. They are connected in parallel to be coupled with the transmitter module 32 for filtering to improve charging quality. The first switching circuit 37 includes a plurality of first switching elements S ₁₁ , S ₁₂ , and each first switching element S ₁₁ , S ₁₂ is respectively connected in series with a corresponding first capacitor C ₁₁ , C ₁₂ . The second switching circuit 38 includes a plurality of second switching elements S ₂₁ , S ₂₂ , and each second switching element S ₂₁ , S ₂₂ is respectively connected in series with a corresponding second capacitor C ₂₁ , C ₂₂ . The controller 36 is electrically connected to the plurality of first switching elements S ₁₁ , S ₁₂ of the first switching circuit 37 and the plurality of second switching elements S ₂₁ , S ₂₂ of the second switching circuit 38 , and according to the representative power receiving device 4 , 4' wireless charging receivers 4a, 4a' using the sensing signal of the wireless charging technology and correspondingly generate a control signal to control a plurality of first switching elements S ₁₁ , S ₁₂ and The multiple second switch elements S ₂₁ , S ₂₂ of the second switch circuit 38 are switched on and off, so that the wireless charging device 3 can operate according to the wireless charging receivers 4a, 4a of the power receiving devices 4, 4' According to the specifications and characteristics of ', the loads 4b, 4b' of the power receiving devices 4, 4' are wirelessly charged by adaptively or selectively switching between magnetic resonance and magnetic induction.

In this embodiment, the operating frequency of the wireless charging device 3 and the power receiving device 4, 4' during operation can be calculated according to the following formula (1): f _a =1/2π(L _a C _a ) ^1/2 =1 /2π(L _b C _b ) ^1/2 =f _b (1), where fa and fb are the operating frequencies of the wireless charging receivers 4a, 4a' of the wireless charging device 3 and the power receiving device 4, 4' respectively, C _a is the capacitance value of the first capacitors C ₁₁ and C ₁₂ of the wireless charging device 3, L _a is the inductance value on the vibrating antenna of the transmitting thin film coil element 31, and C _b is the third capacitor of the power receiving device 4, 4' The capacitance values of C ₃ and C _{3 ′} , and L _b is the inductance value on the vibrating antenna of the receiving film coil elements 41 and 41 ′. For example, the capacitance values of the first capacitors C ₁₁ and C ₁₂ of the wireless charging device 3 can be 0.5 μF and 0.1 nF respectively, and the inductance L on the vibrating antenna of the transmitting thin film coil element 31 is 5 μH. When the capacitance value of the _third capacitor C3 of the power receiving device 4 is 0.5 μF, and the inductance L3 on the vibrating antenna of the receiving film coil element 41 is ₅ μH, the controller 36 of the wireless charging device 3 sends a control signal to the first A switch circuit 37 and a second switch circuit 38 are used to turn on the first switch element S ₁₁ and the second switch element S ₂₁ , and to turn off the first switch element S ₁₂ and the second switch element S ₂₂ , whereby the wireless charging device 3. The first capacitor C11 can be switched and selected (capacitance value is also 0.5 μF), and the inductance value L _on the vibrating antenna of the transmitting thin film coil element 31 is also 5 μH, so that the wireless charging device 3 and the receiving device 4 can be wirelessly charged The working frequency of the receiver 4 a is 100 KHz, so that the electromagnetic wave with a lower frequency can be charged wirelessly by magnetic induction. When the capacitance value of the third capacitor C3 _' of the power receiving device ₄ ' is 0.1nF, and the inductance value L3' on the vibrating antenna of the receiving film coil element 41' is 5μH, the controller 36 of the wireless charging device 3 sends Control signals to the first switching circuit 37 and the second switching circuit 38 to turn on the first switching element S ₁₂ and the second switching element S ₂₂ , and turn off the first switching element S ₁₁ and the second switching element S ₂₁ , by This wireless charging device 3 can switch and select the first capacitor C ₁₂ (capacitance value is also 0.1nF), and the inductance value L on the vibrating antenna 311 of the transmitting thin film coil element 31 is also 5 μh, so that the wireless charging device 3 and the power receiving device The working frequency of the wireless charging receiver 4 a ′ at 4 ′ is 6.78 MHz, so that the wireless charging can be performed by magnetic resonance with a relatively high frequency electromagnetic wave. It should be noted that the aforementioned working frequency is only an example, and the technology of the present invention is not limited to the numerical value of the aforementioned working frequency.

To sum up, the present invention provides a flexible and rollable wireless charging device, which has a flexible and thin charging film, and is easy to roll, store and carry, can increase the flexibility and convenience of wireless charging applications, and save space . The flexible and retractable wireless charging device of the present invention can avoid possible disconnection of the wires between the coil element and the circuit board after multiple retracting operations, thereby prolonging the service life of the wireless charging device. In addition, the flexible and retractable wireless charging device of the present invention can emit more than one electromagnetic wave of different frequencies, which can simultaneously or time-divisionally charge one or more receiving devices that can receive electromagnetic waves of the same frequency or different frequencies , and can be adaptively or selectively switched to use magnetic resonance coupling or magnetic induction to realize wireless charging.

The present invention can be modified in various ways by those skilled in the art without departing from the protection scope of the appended claims.

Claims (12)

1. a wireless charging device for flexible retracting, including:

One first component, has one first accommodation space；

One second component, has one second accommodation space；

One flexible wireless charging thin film, has one first side and one second side, and this first side is fixing even Being connected to this first component, this second side is fixedly connected on this second component, and this flexible wireless charging thin film This first accommodation space being accommodated in this first component can be furled；And

One circuit board, is connected with this flexible wireless charging thin-film electro, and be arranged at this second component this second Accommodation space；

Wherein, when this second component court is away from the direction displacement of this first component, this flexible wireless charging is thin Film launches to arrange, and carries out wireless charging for one or more current-collecting devices；And when this second component towards During the direction displacement of this first component, this flexible wireless charging thin film be accommodated in this first component this In one accommodation space.

The wireless charging device of flexible retracting the most as claimed in claim 1, wherein this flexible wireless charging Thin film is electrically connected by a wire with this circuit board, and this wire be arranged at this second component this second house Space.

The wireless charging device of flexible retracting the most as claimed in claim 1, wherein this first component includes:

One first housing, has this first accommodation space and a fluting, wherein this flexible wireless charging thin film Through this fluting；And

One furling mechanism, is arranged in this first accommodation space, and includes a rotating shaft, and wherein this is flexible wireless This first side of rechargeable thin film is fixedly connected on this rotating shaft, and this rotating shaft framework is in furling this flexible wireless charging Conductive film.

The wireless charging device of flexible retracting the most as claimed in claim 3, wherein this furling mechanism more wraps Include a guiding mechanism, be connected with this rotating shaft, with framework in the number of turns and the orientation angle that adjust this axis of rotation.

The wireless charging device of flexible retracting the most as claimed in claim 4, wherein this guiding mechanism is one Torque force regulating mechanism, and this rotating shaft phase separation, with provide a restoring moment in this rotating shaft so that this wireless charging Conductive film can automatic rolling in this rotating shaft.

The wireless charging device of flexible retracting the most as claimed in claim 1, wherein this second component includes One second housing, this second housing has this second accommodation space and an elongated slot, wherein this flexible wireless charging This second side of conductive film is fixedly connected on this elongated slot.

The wireless charging device of flexible retracting the most as claimed in claim 1, wherein this flexible wireless charging Thin film includes that least one set launches film coil element, and this circuit board includes least one set transmitter module, wherein This transmitting film coil element is electrically connected to this transmitting film group to receive an AC signal of this transmitter module, and This transmitting film coil element launches a characteristic frequency or the electromagnetic wave of multiple different frequency, with to this or Multiple current-collecting devices carry out wireless charging.

The wireless charging device of flexible retracting the most as claimed in claim 7, wherein this transmitting film coil Element comprises:

One flexible base board, have one first with one second, wherein this first relative to this second；

One starting of oscillation antenna, is arranged at this first of this flexible base board；

One resonant antenna, is arranged at this second of this flexible base board, and wherein the two ends of this resonant antenna connect In one or more capacitors, and this resonant antenna couples with this starting of oscillation antenna, to launch this characteristic frequency Electromagnetic wave；

One first protective layer, covers this starting of oscillation antenna；And

One second protective layer, covers this resonant antenna.

The wireless charging device of flexible retracting the most as claimed in claim 8, wherein this transmitting film coil Element further includes a shielding element, is arranged between this starting of oscillation antenna and this first protective layer, or is arranged at this Outside the one of first protective layer, wherein this shielding element includes a metal grill film, a magnetic conductive film or a combination thereof.

The wireless charging device of flexible retracting the most as claimed in claim 7, wherein this transmitter module includes:

One power-switching circuit, is electrically connected to a power supply and the electric energy conversion provided by this power supply；

One agitator, is connected to this power-switching circuit and adjustably exports this exchange letter of a characteristic frequency Number；

One power amplifier, is connected to this agitator and this power-switching circuit, and framework is in amplifying this exchange Signal；And

One filter circuit, is connected to this power amplifier, and framework is in filtering this AC signal.

The wireless charging device of 11. flexible retractings as claimed in claim 1, wherein this circuit board further includes One controller, framework is in controlling the wireless charging device of this flexible retracting with magnetic resonance or magnetic induction way to this Current-collecting device carries out wireless charging.

The wireless charging device of 12. flexible retractings as claimed in claim 1, wherein this flexible wireless charging Thin film includes one first and one second, and these one or more current-collecting devices can be positioned over this first or be somebody's turn to do Second face carries out wireless charging.