Patent Publication Number: US-2022220651-A1

Title: Laundry treatment device

Description:
TECHNICAL FIELD 
     The present invention relates to a laundry treatment device. 
     BACKGROUND ART 
     In general, a laundry treatment device is a home appliance for washing or drying laundry including clothes. For example, the laundry treatment device may include a washing machine and a dryer. 
     Also, the laundry treatment device may be classified into a top loading type laundry treatment device in which a laundry inlet is provided in a top surface thereof and a front loading type laundry treatment device in which a laundry inlet is provided is a front surface thereof. In the top loading type laundry treatment device, a rotation shaft of a drum for allowing the laundry to rotate is vertically disposed. In the front loading type laundry treatment device, a rotation shaft of a drum extends in a horizontal direction. 
     In the laundry treatment device, a manipulation portion is provided in a main body of the washing machine, and an electric wire body is provided inside the main body of the washing machine to supply power to the manipulation portion. As an example, Korean Patent Publication No. 10-2005-0066517 discloses a display panel and an injection mold for the display panel of the washing machine. According to the prior art, when a user loads laundry into a main body of the washing machine, there is a limitation that a manipulation portion is malfunctioned by the user&#39;s body. 
     Recently, to prevent the above-mentioned problems, a laundry treatment device provided with the manipulation portion in the door has been developed. As an example, Korean Patent Publication No. 10-2016-0084325 discloses a clothes treatment device and a door. In detail, a technique for manipulating a laundry treatment device in which a manipulation portion is provided in a door rotating with respect to a washing machine body and which is manipulated through the manipulation portion provided in the door is disclosed. 
     According to the prior art, an electric wire connecting the door and the washing machine body is required to supply power to the manipulation portion provided in the door. Since the electric wire connects the door to the washing machine body, when the door is opened or closed, the electric wire repeatedly moves to reduce durability of the electric wire, resulting in occurring an electrical limitation because the durability of the electric wire is reduced. In addition, since the electric wire connects the door to the washing machine body, it is difficult to separate the door from the washing machine body, thereby making it difficult to maintain the laundry treatment device. 
     DISCLOSURE OF THE INVENTION 
     Technical Problem 
     The present invention may provide a laundry treatment device capable of supplying power to a manipulation portion provided in a door. 
     The present invention may provide a laundry treatment device capable of efficiently supplying power to an manipulation portion provided in a door moving with respect to a washing machine body. 
     The present invention may provide a laundry treatment device capable of allow a washing machine body operating by manipulating a manipulation portion provided in a door. 
     Technical Solution 
     A laundry treatment device according to the present invention may provide a control panel in a door that opens or closes a body, in which laundry is accommodated, and a power transmitter and a power receiver are provided in the door and the body to supply wireless power to the control panel provided in the door so that the control panel operates. 
     In the laundry treatment device according to the present invention, an electric wire configured to connect the door to the body so as to supply the power to the control panel provided in the door may be removed to prevent durability of the electric wire from being reduced by an opening or close of the door. 
     In the laundry treatment device according to the present invention, a manipulation signal may be input from the control panel provided in the door, and a communication portion may be provided in the door and the body to allow the body to receive the manipulation signal so as to operate so that the operation of the body is controlled by the control panel provided in the door to operate. 
     The laundry treatment device according to the present invention may be configured to separate the door from the body, thereby facilitating maintenance thereof. 
     Advantageous Effects 
     According to the present invention, the power may be stably supplied to the control panel provided in the door by the power receiver and power transmitter, which are provided to the door and the body. 
     According to the present invention, even when the door moves with respect to the body, the power may be smoothly transmitted to the control panel provided in the door. 
     According to the present invention, since the power receiver provided in the door and the power transmitter provided in the body are separated from each other, the maintenance of the laundry treatment device may be facilitated. 
     According to the present invention, the door and the body may communicate with each other to quickly transmit the manipulation signal of the control panel to the body. 
     According to the present invention, since the control panel is provided in the door, the control panel may be prevented from unnecessarily operating by the user&#39;s body. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIGS. 1 and 2  are perspective views of a laundry treatment device according to a first embodiment of the present invention. 
         FIG. 3  is a perspective view illustrating a main portion of the laundry treatment device according to the first embodiment of the present invention. 
         FIG. 4  is a view illustrating a configuration of the laundry treatment device according to the first embodiment of the present invention. 
         FIG. 5  is a view illustrating shapes of a power transmitter and a power receiver according to the first embodiment of the present invention. 
         FIG. 6  is a view illustrating a state in which a door is closed according to the first embodiment of the present invention. 
         FIG. 7  is a view illustrating a state in which the door is opened according to the first embodiment of the present invention. 
         FIGS. 8 and 9  are perspective view illustrating a main portion of a laundry treatment device according to a second embodiment of the present invention. 
         FIG. 10  is a cross-sectional view taken along line A-A of  FIG. 9 . 
         FIGS. 11 and 12  are perspective views of a laundry treatment device according to a third embodiment of the present invention. 
         FIG. 13  is a view illustrating a main portion of the laundry treatment device according to the third embodiment of the present invention. 
     
    
    
     MODE FOR CARRYING OUT THE INVENTION 
     Hereinafter, some embodiments of the present invention will be described in detail with reference to the accompanying drawings. Exemplary embodiments of the present invention will be described below in more detail with reference to the accompanying drawings. It is noted that the same or similar components in the drawings are designated by the same reference numerals as far as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted to avoid making the subject matter of the present invention unclear. 
     Also, in the description of the embodiments of the present disclosure, the terms such as first, second, A, B, (a) and (b) may be used. The terms are merely used to distinguish the corresponding component from other components, and do not delimit an essence, an order or a sequence of the corresponding component. It should be understood that when one component is “connected”, “coupled” or “joined” to another component, the former may be directly connected or jointed to the latter or may be “connected”, coupled” or “joined” to the latter with a third component interposed therebetween. 
       FIGS. 1 and 2  are perspective views of a laundry treatment device according to a first embodiment of the present invention, and  FIG. 3  is a perspective view illustrating a main portion of the laundry treatment device according to the first embodiment of the present invention. 
     Referring to  FIGS. 1 to 3 , a laundry treatment device  1  according to a first embodiment of the present invention may include a body  5 . The body  5  may include a base  6 , a cabinet  7 , and a top cover  8 . 
     The base  6  may be provided in a flat shape corresponding to the bottom on which the laundry treatment device  1  is installed. The base  6  may be supported on the bottom by four support legs  61  installed near four corners of the cabinet  7 . A drain pump (not shown) may be installed on the base  6 . 
     The cabinet  7  stands upright on a top surface of the base  6  and has a front surface, a rear surface, and left and right surfaces to define an accommodation space therein. The top surface of the cabinet  10  may be opened. 
     The top cover  8  may be coupled to an opened upper end of the cabinet  7 . The top cover  8  may be provided with an inlet for loading or unloading laundry (or “cloths”). 
     A dispenser  81  for supplying an additive acting on the laundry together with water to a water tub  9  to be described later may be provided in the top cover  8 . The additive supplied by the dispenser  81  may include a detergent, a fabric softener, and the like. The dispenser  81  may include a detergent accommodation part  81   a  that supplies the detergent together with the water and a fabric softener accommodation part  81   b  that supplies the fabric softener together with the water. 
     The water tub  9  may be disposed inside the cabinet  7 . The water tub  9  may include an outer tub (not shown) and an inner tub  9   b.  The outer tub (not shown) may be understood as a configuration for containing water in the cabinet  7 . The outer tub may be fixed in a hung state within the cabinet  7 . In addition, a suspension (not shown) for buffering vibration that may be generated in the outer tub may be further provided. 
     The inner tub  9   b  may be disposed inside the outer tub. The laundry is accommodated in the inner tub  9   b  to rotate about a vertical axis of the outer tub. A plurality of holes through which water passes may be defined in the inner tub  9   b.  The inner tub  9   b  and the outer tub may be fluidly connected to each other through the holes. 
     A pulsator (not shown) may be rotatably provided on an inner bottom of the inner tub  5 . The pulsator may include a plurality of radial ribs that protrude upward. When the pulsator rotates, a water stream may be formed by the ribs. 
     A washing motor (not shown) providing power for rotating the inner tub  5  and the pulsator may be disposed in the cabinet  1 . The washing motor may be mounted on a bottom surface of the outer tub. 
     A rotation shaft of the washing motor may be always coupled to the pulsator and selectively coupled to the inner tub  5  according to a switching operation of a clutch (not shown). Thus, when the rotation shaft of the washing motor is operated in the state of being coupled to the inner tub  5 , the pulsator and the inner tub  5  may integrally rotate. Also, in a state in which the rotation shaft of the washing motor is separated from the inner tub  5 , only the pulsator  15  rotates in a state in which the inner tub  5  is stopped. 
     The laundry treatment device  1  may further include a drain configuration that discharges water from the outer tub to the outside. The drain configuration may include a bellows (not shown), a drain valve (not shown), a drain pump (not shown), and the like. The washing water may be drained to the outside of the laundry treatment device  1  by an operation of the drain configuration. 
     The laundry treatment device  1  may include a door  10 . The door  10  may open or close the inlet of the top cover  8 . The door  10  may be rotatably coupled to the top cover  8 . The door  10  and the top cover  8  may be rotatably connected to each other by a hinge portion  13 . 
     The door  10  may include a transparent structure  11 . An opening for installing the transparent structure  11  may be defined in the door  10 . The transparent structure  11  may be fixed to the opening of the door  10 . The transparent structure  11  may allow the laundry accommodated in the inner tub  9   b  to be visible to the user in a state in which the door  10  closes the inlet. The user may directly check a laundry state with the user&#39;s eyes by using the transparent structure  11 . 
     The door  10  may include a control panel  12 . The user may manipulate the laundry treatment device  1  through the control panel  12 . In this embodiment, the control panel  12  may be provided in the transparent structure  11 . Alternatively, the control panel  12  may be provided at one side of the door  10 . 
     The control panel  12  may be provided in the transparent structure  11  or may be provided in the transparent structure  11  as a watertight structure. For example, when the control panel  12  is provided in the transparent structure  11 , after checking the state of the laundry accommodated in the inner tub  9   b  through the transparent structure  11  with the user&#39;s eyes, the operation of the laundry treatment device  1  may be controlled. In addition, since the control panel  12  is provided in the door  10 , in the state in which the door  10  is opened, the laundry treatment device  1  may be prevented from operating. In addition, since the control panel  12  is provided in the door  10 , a limitation in which the control panel  12  is pressed by the user&#39;s body to unnecessarily operate may be prevented. In addition, since the control panel  12  has the watertight structure, water may be prevented from being introduced into the control panel  12 . 
     The control panel  12  may include an input portion  121  and a display portion  122 . The input portion  121  may include a key, a button, a touch panel, etc. that is capable of setting, selecting, and adjusting various operation modes provided by the laundry treatment device  1 . The user may manipulate the operation of the laundry treatment device  1  by manipulating the input portion  121 . The display portion  122  may display various pieces of information including a driving state of the laundry treatment device, a response according to the selection of the driving mode, a warning, a notification, and the like. Also, the display part  122  may be provided in the form of a display panel such as a lamp, an LCD panel, an LED panel, and the like. In this embodiment, the control panel  12  may be provided as a touch type display panel in which the input portion  121  and the display portion  122  are integrated with each other. 
     The door  10  may include a power receiver  102  capable of receiving wireless power. In addition, the body  5  may include a power transmitter  53  that transmits the wireless power to the power receiver  102 . The control panel  12  provided in the door  10  may be electrically connected to the power receiver  102  to operate by the wireless power transmitted from the power transmitter  53 . 
       FIG. 4  is a view illustrating a configuration of the laundry treatment device according to the first embodiment of the present invention. 
     Referring to  FIG. 4 , the laundry treatment device  1  according to the present invention may include the body  5  and the door  10 . Hereinafter, a configuration for supplying the wireless power to the control panel  12  provided in the door  10  will be described in detail. 
     Hereinafter, the body  5  will be described. 
     The body  5  may include a first controller  51 . The first controller  51  may control an operation of the body  5 . The first controller  51  may control an operation of the laundry treatment device  1  or may control an operation of the power transmitter  53  to be described later. In this embodiment, although the first controller  51  is described as controlling the function for transmitting the wireless power, but the first controller  51  may control the operation of the laundry treatment device  1 . 
     The body  5  may include a power source  52 . The power source  52  may be understood as a configuration for supplying power to the laundry treatment device  1 . A portion of the power supplied to the power source  52  may be transmitted as the wireless power by the power transmitter  53 , and the laundry treatment device  1  may operate by the remaining portion of the power supplied to the power source  52 . The power source  52  may receive power from the outside to allow the laundry treatment device  1  to operate. 
     The body  5  may include a power transmitter  53 . The power transmitter  53  may transmit the wireless power to the door  10 . The power transmitter  53  may receive power from the power source  52  to transmit the received power as the wireless power. The configuration of the power transmitter  53  may be changed according to a wireless power supply method. For example, the power transmitter  53  may be provided as a coil, an antenna, a resonator, or the like. The power transmitter  53  may be manipulated by the first controller  51 . In this embodiment, the power transmitter  53  may transmit the wireless power in a magnetic induction method or a magnetic resonance method. 
     The body  5  may include a power oscillator  54 . The power oscillator  54  may change a frequency of the wireless power transmitted from the power transmitter  53 . In this case, the frequency changed by the power oscillator  54  may be understood as a resonance frequency or the like. The wireless power changed in frequency to a specific frequency by the power oscillator  54  may be transmitted from the power transmitter  53  to the door  10 . The first controller  51  may control the power oscillator  54  to transmit the wireless power changed in frequency to a specific frequency from the power transmitter  53 . In this embodiment, it is referred to as the power oscillator, but may also be referred to as a power amplifier. 
     The body  5  may include a first communication portion  55 . The first communication portion  55  may transmit and receive a plurality of pieces of information. The first communication portion  55  may be understood as a communication module for transmitting and receiving information. For example, the first communication portion  55  may receive operation information from the control panel  12  of the door  10 . The body  5  may transmit information on an operation state of the laundry treatment device  1  to the first communication portion  55 . That is, the first communication portion  55  may receive operation information from the control panel  12  of the door  10  to allow the laundry treatment device  1  to operate. In addition, the information on the operation state of the laundry treatment device  1  may be transmitted to the control panel  12  of the door  10  to display an operation state of the laundry treatment device  1  on the control panel  12 . 
     The body  5  may include a first storage portion  56 . The plurality of pieces of information may be stored in the first storage portion  56 . The first controller  51  may control an operation of the body  5  based on the information stored in the first storage portion  56 . The plurality of pieces of information stored in the first storage portion  56  include information for controlling the operation of the body  5 , information for controlling the operation of the power transmitter  53 , and frequency information of the wireless power transmitted from the power transmitter  53 . 
     Hereinafter, the door  10  will be described. 
     The door  10  may be provided with the control panel  12 . The door  10  may be provided with a configuration for driving the control panel  12 . The control panel  12  may operate by a configuration provided in the door  10 . 
     The door  10  may include a second controller  101 . The second controller  101  may control an operation of the control panel  12 . In detail, the second controller  101  may control operations of the input portion  121  and the display portion  122  of the control panel  12 . The second controller  101  may control an operation of a configuration provided in the door  10 . The second controller  101  may operate by the power transmitted from the power transmitter  53 . 
     The door  10  may include the power receiver  102 . The power receiver  102  may receive the wireless power transmitted from the power transmitter  53 . A configuration of the power receiver  102  may be changed according to a wireless power supply method. For example, the power receiver  102  may be provided as a coil, an antenna, a resonator, or the like. The power receiver  102  may be manipulated by the second controller  101 . In this embodiment, the power receiver  102  may receive the wireless power in a magnetic induction method or a magnetic resonance method. 
     The door  10  may include a power rectifier  103 . The power rectifier  103  may rectify the wireless power received from the power receiver  102 . The power rectifier  103  may rectify the wireless power, which is changed in frequency, into power capable of being used in the control panel  12 . The power rectified by the power rectifier  103  may be consumed by the control panel  12 . 
     The door  10  may include a battery  104 . The battery  104  may be charged by the power rectified by the power rectifier  103 . The battery  104  may store power for the operation of the control panel  12 . The battery  104  may be charged by the wireless power transmitted from the power transmitter  53  and may function as an auxiliary power supply for supplying power to the control panel  12 . The battery  104  may drive the operation of the control panel  12  by consuming the power of the battery  104  when the wireless power is not transmitted from the power transmitter  53 . The battery  104  may provide standby power for the control panel  12  to prevent the control panel  12  from being stopped. 
     The door  10  may include a second communication portion  106 . The second communication portion  106  may transmit and receive a plurality of pieces of information. The second communication portion  106  may be understood as a communication module for transmitting and receiving information. In this embodiment, the second communication portion  106  may transmit information on the control panel  12  to the first communication portion  55  of the body  5 . In addition, the second communication portion  106  may receive the plurality of pieces of information transmitted from the first communication portion  55 . The body  5  and the control panel  12  may communicate with each other by the first communication portion  55  and the second communication portion  106 . 
     The door  10  may include a second storage portion  107 . The plurality of pieces of information may be stored in the second storage portion  107 . The second storage portion  107  may store information on the control panel  12 , information on the operation of the control panel  12 , information on the operation of the laundry treatment device  1 , and the like. The second controller  101  may control the operation of the control panel  12  based on the information stored in the second storage portion  107 . The plurality of pieces of information stored in the second storage portion  107  may be transmitted to the first communication portion  55  by the second communication portion  106 . For example, when the input portion  121  of the control panel  12  operates, the second communication portion  106  may transmits the information about the operation input from the input portion  121  to the first communication portion  55  to allow the laundry treatment device  1  to operate. In addition, the second communication portion  106  may receive the operation state of the laundry treatment device  1  from the first communication portion  55 , and the information on the operation state of the laundry treatment device  1  may be displayed on the display portion  122  of the control panel  12 . 
     The control panel  12  may include the input portion  121  and the display portion  122 . The input portion  121  may receive a manipulation signal from the user. The laundry treatment device  1  may operate based on a signal input through the input portion  121 . For example, the input portion  121  may receive the manipulation signal from the user. The display portion  122  may display information according to a change in operation state of the laundry treatment device  1 . For example, the display portion  122  may include an operation time, a remaining time, and an operation mode of the laundry treatment device  1 . 
     The operation signal input through the input portion  121  may be transmitted from the door  10  provided with the control panel  12  to the body  5 , and thus, the laundry treatment device  1  may be operate. Also, when the laundry treatment device  1  operates, the operation state of the laundry treatment device  1  may be displayed on the display portion  122  so that the user checks the operation state of the laundry treatment device  1 . 
     According to the present invention, since the control panel  12  is provided in the door  10 , the control panel  12  may move by movement of the door  10 . In addition, since the door  10  is provided with the transparent structure  11 , the inside of the body  5 , in which the laundry is accommodated, may be quickly checked with the user&#39;s eyes, and then, the operation of the laundry treatment device  1  may be controlled. In addition, since the power transmitter  53  and the power receiver  102  for transmitting and receiving the wireless power are provided in the body  5  and the door  10  rotating with respect to the body  5 , there is an advantage that an electric wire connecting the door  10  to the body  5  is not provided. 
       FIG. 5  is a view illustrating shapes of the power transmitter and the power receiver according to the first embodiment of the present invention. 
     Referring to  FIG. 5 , the power transmitter  53  according to the present invention may be configured to transmit the wireless power. The power receiver  102  may be configured to receive the wireless power transmitted from the power transmitter  53 . In this embodiment, the power transmitter  53  and the power receiver  102  may transmit/receive the wireless power in a magnetic induction method or a magnetic resonance method. In addition, the power transmitter  53  and the power receiver  102  are disposed to face each other, and the wireless power transmitted from the power transmitter  53  may be received by the power receiver  102 . Hereinafter, structures of the power transmitter  53  and the power receiver  102  configured to transmit and receive the wireless power will be described. In this embodiment, each of the power transmitter  53  and the power receiver  102  may be provided in a coil structure. Here, the power transmitter  53  may be defined as a primary-side coil, and the power receiver  102  may be defined as a secondary-side coil. That is, the wireless power transmitted from the power transmitter  53  serving as the primary-side coil may be received by the power receiver  102  serving as the secondary-side coil. 
     The power transmitter  53  may include a first coil  532  and a first coil support  531 . The first coil  532  may be provided in a state of being wound in a specific shape. For example, the first coil  532  may be supported by the first coil support  531  in a circularly wound state. The first coil  532  may be installed on the body  5  in a state of being supported by the first coil support  531 . Also, the first coil  532  may be installed on the hinge portion  13  while being supported by the first coil support  531 . A seating groove in which the first coil  532  is capable of being seated may be defined in the first coil support  531 . 
     The power transmitter  53  may include a first terminal  533 . The first terminal  533  may be defined as one end and the other end of the first coil  532  wound in the circular shape. The first terminal  533  may electrically connect the power transmitter  53  to the first controller  51 . That is, electricity may be applied to the first coil  532  through the first terminal  533 . 
     When current is applied to the first coil  532  of the power transmitter  53 , electromagnetic fields may be generated in the first coil  532 . The electromagnetic fields generated by the first coil  532  may cause electromotive force to be induced in the second coil  102   b  of the power receiver  102  to be described later. When the electromotive force is induced in the second coil  102   b,  a current flow is generated in the second coil  102   b,  and thus, power may be supplied from the power receiver  102 . 
     The power receiver  102  may include a second coil  102   b  and a second coil support  102   a.  The second coil  102   b  may be provided in a state of being wound in a specific shape. For example, the second coil  102   b  may be supported by the second coil support  102   a  in a circularly wound state. The second coil  102   b  may be installed in the door  10  in a state of being supported by the second coil support  102   a.  In addition, the second coil  102   b  may be installed in the hinge portion  13  in a state of being supported by the second coil support  102   a.  A seating groove in which the second coil  102   b  is capable of being seated may be defined in the second coil support  102   a.    
     The power receiver  102  may include a second terminal  102   c.  The second terminal  102   c  may be defined as one end and the other end of the second coil  102   b  wound in the circular shape. The second terminal  102   c  may electrically connect the power receiver  102  to the second controller  101 . That is, electricity may be applied to the second controller  101  through the second terminal  102   c.    
     The second coil  102   b  of the power receiver  102  may receive the electromagnetic fields generated by the first coil  532 . When the electromagnetic fields are applied to the second coil  102   b,  electromotive force may be induced in the second coil  102   b.  When the electromotive force are induced in the second coil  102   b,  power may be applied to the power receiver  102 . When the power receiver  102  moves away from the power transmitter  53 , the electromagnetic fields are not received from the power transmitter  53  to the power receiver  102 , and thus, the power supply may be stopped. When the power supply of the power receiver  102  is stopped, the second controller  101  may receive power from the battery  104 . 
       FIG. 6  is a view illustrating a state in which the door is closed according to the first embodiment of the present invention, and  FIG. 7  is a view illustrating a state in which the door is opened according to the first embodiment of the present invention. 
     Referring to  FIGS. 6 and 7 , the door  10  of the laundry treatment device  1  according to the present invention may be provided with the control panel  12 . The control panel  12  may move by movement of the door  10 . After the door  10  is opened or closed, the user may manipulate the operation of the laundry treatment device  1  using the control panel  12 . 
     The control panel  12  provided in the door  10  may operate by receiving the power from the body  5  of the laundry treatment device  1 . In this embodiment, the body  5  may wirelessly transmits the power toward the door  10 , and the door  10  may receive the wireless power transmitted to the body  5  to control the control panel  12 . 
     In detail, the laundry treatment device  1  may include the power transmitter  53  and the power receiver  102 . The power transmitter  53  may be provided in the body  5 , and the power receiver  102  may be provided in the door  10 . The door  10  may be provided to be rotatable with respect to the body  5  and be provided to be separable from the body  5 , and thus, the power transmitter  53  and the power receiver  102  may be provided to the body  5  and the doors  10 , respectively. 
     The power transmitter  53  and the power receiver  102  may be provided at one side of the door  10  and one side of the body  5 , which are disposed adjacent to each other, respectively. For example, the power transmitter  53  and the power receiver  102  may be provided in one surface of the door  10  rotating with respect to the body  5  and one surface of the body  5  facing the one surface of the door  10 . In this embodiment, at least one power transmitter  53  may be provided. The power transmitter  53  includes a first power transmitter  53   a  that transmits power to the power receiver  102  of the door  10  when the door  10  is opened, and a second transmitter  53   b  that transmits power to the power receiver  102  when the door  10  is closed. The first power transmitter  53   a  and the second power transmitter  53   b  may be provided as a single power transmitter  53 . When the door  10  is opened, the first power transmitter  53   a  and the power receiver  102  may face each other. When the door  10  is closed, the second power transmitter  53   b  and the power receiver  102  may face each other. Also, the door  10  may further include a power transmitter  53  capable of transmitting power to the power receiver  102  when the door  10  rotates with respect to the body  5 . 
     The power transmitter  53  and the power receiver  102  may be provided in a connection structure connecting the door  10  to the body  5 . For example, the power transmitter  53  and the power receiver  102  may be provided in the hinge portion that rotatably connects the door  10  to the body  5 . 
     The power transmitter  53  may transmit the wireless power from the body  5  toward the power receiver  102 . The body  5  may include a power source  52  that supplies power to the power transmitter  53 . The power source  52  may be understood as a configuration for supplying power to the laundry treatment device  1  and the power transmitter  53 . The power transmitter  53  may transmit a portion of the power supplied from the power source  52  to the door  10  provided with the power receiver  102 . 
     The power receiver  102  may receive the wireless power transmitted from the power transmitter  53 . The power receiver  102  may be electrically connected to the control panel  12 . For example, the power receiver  102  and the control panel  12  may be connected to each other by an electric wire W. When the wireless power is received by the power receiver  102 , the received wireless power may be transmitted to the control panel  12 . The control panel  12  may operate by the wireless power received by the power receiver  102 . 
     In this embodiment, the power receiver  102  may be disposed at one side of the door  10 . The one side of the door  10  at which the power receiver  102  is disposed may be defined as one side of the door  10  at which a rotation shaft C of the door  10  rotating with respect to the body  5  is disposed. In addition, the other side of the door  10  may be defined as the other side of the door  10  at which the handle is disposed. 
     The power transmitter  53  may be disposed at one side of the body  5  at which the rotation shaft C of the door  10  is fixed. In this embodiment, the rotating shaft C of the door  10  may be fixed to the top cover  8  of the body  5 . The rotation shaft C may be understood as a rotation center in which the door  10  is fixed to one side of the body  5  to rotate. A portion of the power transmitter  53  and a portion of the power receiver  102  may face each other. 
     The door  10  may open and close the inlet of the body  5 . The power transmitter  53  may transmit the wireless power to the power receiver  102  even when the door  10  is opened or closed. The power receiver  102  and the power transmitter  53  may transmit and receive the wireless power in the state of facing each other. When the power receiver  102  and the power transmitter  53  face each other, the wireless power transmitted from the power transmitter  53  may be received by the power receiver  102  in a state in which a loss is minimized. 
     According to the present invention, even when the door  10  rotates with respect to the body  5 , the wireless power transmitted from the power transmitter  53  may be received by the power receiver  102 . That is, the wireless power supplied from the body  5  to the door  10  may be prevented from being cut off. In addition, to supply power to the control panel  12 , the electric wire connecting the door  10  to the body  5  may be removed. When the electric wire for connecting the door  10  to the body  5  is removed, the laundry treatment device  1  may be configured so that the door  10  is easily detached from the body  5 . In addition, an electrical limitation that may be caused by moisture may be prevented by waterproofing a space between the door  10  and the body  5 . 
     The power receiver  102  and the power transmitter  53  may be disposed to face each other according to whether the door  10  is opened. At least one of the power receiver  102  or the power transmitter  53  may be provided. The plurality of power receivers  102  and the plurality of power transmitters  53  may be disposed to be spaced apart from each other. When the door  10  is opened or closed, some of the plurality of power receivers  102  and some of the plurality of power transmitters  53  may face each other to transmit and receive the wireless power. 
     In this embodiment, the door  10  may be provided with one power receiver  102 . The body  5  may be provided with a first power transmitter  53   a  and a second power transmitter  53   b.  When the door  10  is opened, the power receiver  102  and the first power transmitter  53   a  may face each other. When the door  10  is closed, the power receiver  102  and the second power transmitter  53   b  may face each other. When the first power transmitter  53   a  and the second power transmitter  53   b  and the power receiver  102  face each other, the wireless power may be transmitted. When the first power transmitter  53   a  and the second power transmitter  53   b  and the power receiver  102  do not face each other, power may be received from the battery  104  provided in the control panel  12 . 
       FIGS. 8 and 9  are perspective view illustrating a main portion of a laundry treatment device according to a second embodiment of the present invention, and  FIG. 10  is a cross-sectional view taken along line A-A of  FIG. 9 . 
     A laundry treatment device according to a second embodiment is characterized in that a portion of the laundry treatment device according to the first embodiment is modified. Thus, a portion of the configuration of the laundry treatment device according to the second embodiment may be the same as that of the configuration of the laundry treatment device according to the first embodiment. Therefore, descriptions of some components of the laundry treatment device according to the second embodiment may be replaced with those of some components of the laundry treatment device according to the first embodiment. 
     Referring to  FIGS. 8 to 10 , the laundry treatment device according to the second embodiment of the present invention may include a hinge portion  13  connecting a door  10  to a body  5 . One side of the hinge portion  13  may be connected to the door  10 , and the other end of the hinge portion  13  may be connected to the body  5 . In this embodiment, the other side of the hinge portion  13  may be connected to a top cover  8  of the body  5 . The hinge portion  13  may allow the door  10  to rotate with respect to the body  5 . 
     The hinge portion  13  may include a first hinge  131  and a second hinge  132 . A portion of the first hinge  131  and the second hinge  132  may be rotatably connected to each other. The first hinge  131  may include a rotation shaft  131   a.  The second hinge  132  may be connected to the rotation shaft  131   a  to rotate. At least one hinge portion  13  may be provided between the body  5  and the door  10 . The first hinge  131  may be fixed to the body  5 , and the second hinge  132  may be fixed to the door  10 . 
     The laundry treatment device according to the present invention may include a power receiver  102  and a power transmitter  53 . In this embodiment, the power receiver  102  may be provided in the second hinge  132 , and the power transmitter  53  may be provided in the first hinge  131 . The power receiver  102  and the power transmitter  53  may be disposed to face each other. The first hinge  131  and the power transmitter  53  may be electrically insulated from each other. The second hinge  132  and the power receiver  102  may be electrically insulated from each other. Also, the first hinge  131  and the second hinge  132  may be electrically insulated from each other. The first hinge  131  and the second hinge  132  and the power receiver  102  and the power transmitter  53  may be configured to be electrically insulated from each other to prevent electrical short circuit from occurring in the hinge portion  13 . 
     The power transmitter  53  may receive power from the body  5 . The power transmitter  53  may be controlled by a first controller of the body  5 . The power transmitter  53  may transmit wireless power to the power receiver  102 . 
     The power receiver  102  may receive the wireless power transmitted from the power transmitter  53 . The power received by the power receiver  102  may be transmitted to a control panel  12  provided in the door  10 . The control panel  12  may operate by the power received from the power receiver  102 . The power receiver  102  may be controlled by a second controller provided in the door  10 . 
     In this embodiment, the power transmitter  53  may be provided at one side of the first hinge  131  facing the second hinge  132 . The power receiver  102  may be provided at one side of the second hinge  132  facing the power transmitter  53 . The power transmitter  53  and the power receiver  102  may be spaced apart from each other. That is, the wireless power transmitted from the power transmitter  53  may be received by the power receiver  102  even when the second hinge  132  rotates with respect to the first hinge  131 . 
     A stopper  135  may be provided between the power transmitter  53  and the power receiver  102 . The stopper  135  may be fixed to a rotation shaft  131   a.  The stopper  135  may allow the power transmitter  53  and the power receiver  102  to be spaced a regular interval from each other. 
     For example, the power transmitter  53  may be disposed in one surface of the first hinge  131  from which the rotation shaft  131   a  protrudes from the first hinge  131 . The power receiver  102  is connected to the rotation shaft  131   a  and be disposed in one surface of the second hinge  132  facing one surface of the first hinge  131 . The power receiver  102  and the power transmitter  53  may be disposed to be spaced a regular interval from each other. The wireless power transmitted from the power transmitter  53  may be received by the power receiver  102 . The wireless power received by the power receiver  102  may be supplied to the control panel  12 . 
     According to the present invention, the power transmitter  53  and the power receiver  102  are provided in the hinge portion  13  connecting the door  10  to the body  5  to supply the power to the control panel  12  provided in the door  10 . Since an electric wire connecting the body  5  to the door  10  to supply power to the control panel  12  is not provided, an opening and closing of the door  10  is smooth, and thus, an opening range of the door  10  may be expanded. In addition, the hinge portion  13  may be detachably provided so that the door  10  and the body  5  are separated from each other. In addition, when the hinge portion  13  is coupled, the power may be supplied from the body  5  to the control panel  12  of the door  10 . 
       FIGS. 11 and 12  are perspective views of a laundry treatment device according to a third embodiment of the present invention, and  FIG. 13  is a view illustrating a main portion of the laundry treatment device according to the third embodiment of the present invention. 
     A laundry treatment device according to a third embodiment is characterized in that a portion of the laundry treatment device according to each of the first and second embodiments is modified. Thus, a portion of the configuration of the laundry treatment device according to the third embodiment may be the same as that of the configuration of the laundry treatment device according to each of the first and second embodiments. Therefore, descriptions of some components of the laundry treatment device according to the third embodiment may be replaced with those of some components of the laundry treatment device according to each of the first and second embodiments. 
     Referring to  FIGS. 11 to 13 , a laundry treatment device  2  according to a third embodiment of the present invention may include a cabinet  25  having an outer appearance and an outer shape thereof. 
     The cabinet  25  may be provided in a hexahedral shape. The cabinet  25  includes a top cover  25   a  defining a top surface of the hexahedral shape, a side cover  25   b  defining each of both sides of the hexahedral shape, a base cover  25   c  defining a bottom surface of the hexahedral shape, a front cover  25   d  defining a front surface of the hexahedral shape, and a back cover  25   e  defining a rear surface of the hexahedral shape. 
     An inlet for loading laundry may be provided in the front cover  25   d.  A circular door  30  for opening or closing the inlet may be rotatably installed on the front cover  25   d.  One side of the door  30  may be coupled to a hinge portion  29 , and the other side of the door  30  may rotate in a front and rear direction around the hinge portion  29 . A push-type locking device is provided at the other side of the door  30 , and when the other side of the door  30  is pushed once, the door  30  may be locked, and when the door  30  is pushed again, the door  30  may be unlocked. 
     A portion of the door  30  is provided as a transparent structure  31 , and thus, laundry, which is washed, dehydrated, and dried, may be checked from an external space. An upper end of the door  30  is provided with a touch-type display portion  32  for user&#39;s manipulation so that an operation mode for performing washing, dehydrating, and drying operations is selected and switched. The touch-type display portion  32  may move by the door  30 . 
     A drum  27  into which laundry is loaded through the inlet and which is rotatably mounted may be provided in the cabinet  25 . A lifter may be installed on an inner circumferential surface of the drum  27 , and when the drum  27  rotates, the laundry may ascend and descend by the lifter and thus be washed. The drum  27  may be selectively opened or closed by the door  30 . 
     A power button  34  may be provided at an upper right side of the front cover  25   d  to turn on/off the power during the washing, dehydrating, and drying operations of the laundry treatment device  2 . 
     A detergent supply portion may be installed in a lower portion of the cabinet  25  so as to be withdrawn and inserted in a drawer type, and a lower cover  26  covering the detergent supply portion may be installed to be rotatable in a vertical direction. 
     The laundry treatment device  2  according to the present invention may include a power transmitter  153  and a power receiver  202 . The power transmitter  153  may be provided in the cabinet  25 , and the power receiver  202  may be provided in the door  30 . In addition, the power transmitter  153  may be provided in the hinge portion  29 , and the power receiver  202  may be provided in the door  30 . When the door  30  closes the cabinet  25 , the power transmitter  153  and the power receiver  202  may face each other. Wireless power transmitted from the power transmitter  153  may be received by the power receiver  202 . In this embodiment, the power transmitter  153  may be disposed at one side of the hinge portion  29 , and the power receiver  202  may be disposed at the other side of the hinge portion  29 . Here, the one side of the hinge portion  29  may be defined as a portion of the hinge portion  29  fixed to the cabinet  25 , and the other side of the hinge portion  29  may be defined as a portion of the hinge portion  29  fixed to the door  30 . 
     Also, in the present embodiment, although it is described that the power transmitter  153  and the power receiver  202  are provided in the hinge portion  29 , the power transmitter  153  may be disposed at one side of the cabinet  25 , and the power receiver  202  may be disposed at one side of the door  30  facing the power transmitter  153 . That is, when the door  30  is closed, the power receiver  202  and the power transmitter  153  may face each other to transmit and receive the wireless power. In addition, when the door  30  is opened, the power receiver  202  receiving the wireless power transmitted from the power transmitter  153  may be further installed so that the wireless power is supplied even when the door  30  is opened. 
     The power transmitter  153  may receive power from the cabinet  25  and wirelessly transmit the power to the power receiver  202 . Also, an operation of the power transmitter  153  may be controlled by a controller of the cabinet  25 . The power receiver  202  may receive the wireless power transmitted from the power transmitter  153  and transmit the received wireless power to the touch-type display portion  32 . The operation of the power transmitter  153  may be controlled by a controller of the touch-type display portion  32 . A battery may be further provided in the touch-type display portion  32  and be charged by the wireless power received by the power receiver  202 . When the power receiver  202  does not receive the wireless power from the power transmitter  153 , the touch-type display portion  32  may operate using the power of the battery. The touch-type display portion  32  and the cabinet  25  may communicate with each other to transmit/receive information. When the touch-type display portion  32  operates by a user, the cabinet  25  may treat laundry based on an operation signal transmitted from the touch-type display portion  32 .