Patent Publication Number: US-2022211214-A1

Title: Blender

Description:
TECHNICAL FIELD 
     The present disclosure relates generally to a blender. More particularly, the present disclosure relates to a blender in which a main body operates when the closure of a container lid of a container body is detected. 
     BACKGROUND ART 
     Generally, a blender is a household appliance which chops or crushes food received in a container body by blades rotated by an electric motor, and is also commonly referred to as a food mixer. 
     In such a blender, the container body is seated on the upper surface of a main body in which the motor is provided, and when the container body is seated, the blades provided in the container body are connected to a rotating shaft of the motor to be rotatable. 
     After a user puts food in the container body through an open portion of the container body and closes a container lid thereof, the user operates the motor by manipulating the main body to rotate the blades such that the food is crushed. 
     The container lid closes the open portion of the container body to protect food inside the container body. For safety during the operation of the blender, the blades are not rotated in a state in which the container lid does not close the container body. That is, to prevent accidents due to the blades, the blades are preferably allowed to be rotated only when the closure of the container lid of the container body is detected. 
     Conventionally, various methods of detecting the closure of a container lid have been proposed. 
     For example, in U.S. Pat. Nos. 6,910,800 and 7,871,196, a push rod physically connecting the container body with the blender body is provided, and when the container lid closes the container body, the container lid presses the push rod. A press detection part of the main body detects the pressing of the container lid, and detects the closure of the container lid. 
     However, the push rod and the press detection part are required to be separately installed, and the press detection part may be contaminated due to moisture or food that may enter the press detection part. 
     In addition, the push rod of the container body and the press detection part of the main body are required to be installed at positions corresponding to each other, so there is a problem that the container body is required to be mounted only in a specific direction. 
     Additionally, the push rod is required to be installed along the container body in a longitudinal direction thereof from the container body to the main body, so the design of the container body made of a transparent material is spoiled. 
     Recently, in order to solve this problem, a technique of detecting the closure of the container lid of the container body by the main body by using wireless communication or electromagnetic coupling between the container body and the main body has been disclosed. 
     For example, in European Patent No. EP2548485, when a container lid closes the container body, a blender detecting the closure of the container lid of the container body by the main body by using a wireless communication module is disclosed. 
     However, in such a prior art, the wireless communication module is required, and a separate power supply is required to be provided in the container body so as to drive the wireless communication module. 
     For another example, in US Patent Application Publication No. 2018/0020875, an interlocking blending device is disclosed in which a transmitting coil and a receiving coil are disposed in the main body, and a receiving coil and a transmitting coil are disposed in a container body so as to correspond to the transmitting coil and receiving coil, respectively, and when a container lid closes the container body, power is transmitted to the receiving coil of the container body through the transmitting coil of the main body, and in turn, the power is transmitted to the receiving coil of the main body through the transmitting coil of the container body, so that the main body detects the closure of the container lid of the container body. 
     However, in such a prior art, two coils, that is, a transmitting coil and a receiving coil, are required to be installed in each of the main body and the container body, and a device analyzing power received by the receiving coil of the main body is required. 
     In addition, two coils are arranged in each of the main body and the container body, and when electric current flows through each coil, induced currents change due to interference between magnetic fields induced in the coils. Accordingly, it is difficult to accurately analyze power received by the receiving coil of the main body. 
     Furthermore, power is transmitted from the transmitting coil of the main body to the receiving coil of the container body, and, due to the closure of a container lid of the container body, the power is transmitted from the transmitting coil of the container body to the receiving coil of the main body. In order to allow the receiving coil of the main body to receive effective power, high power is required to be transmitted from the transmitting coil of the main body to the receiving coil of the container body. 
     Additionally, to electrically connect a container lid detection circuit with the main body, a conductive member is installed along the transparent container body, and thus the design of the transparent container body is spoiled. 
     DISCLOSURE 
     Technical Problem 
     The present disclosure is intended to propose a blender in which one induction coil may be disposed in a main body and one induction coil may be disposed in a container body and through one inductive coupling between the two induction coils, the closure of the container lid of the container body is detected. 
     The present disclosure is intended to propose a blender in which a detection error or contamination due to external contaminants such as water or food is prevented. 
     The present disclosure is intended to propose a blender in which the design of the container body made of a transparent material is maintained. 
     The present disclosure is intended to propose a blender in which the closure of a container lid of the container body is accurately detected with low power. 
     The present disclosure is intended to propose a blender in which induction coils mounted to the main body and the container body, respectively, are configured to be removable therefrom. 
     The present disclosure is intended to propose a blender in which when the container lid closes the container body, a magnetic field induced in an electromagnet is detected such that the main body can detect the closure of the container lid of the container body. 
     The objectives of the present disclosure are not limited to the objectives mentioned above, and other objectives not mentioned may be clearly understood by those skilled in the art to which the present disclosure belongs from the following description. 
     Technical Solution 
     In a blender of the present disclosure, through one-time inductive coupling between a first induction coil mounted to a main body and a second induction coil mounted to a container body, a sensor mounted to the main body may detect a magnet of an electromagnet mounted to the container body, so that the main body may detect the closure of a container lid of the container body. 
     In the blender of the present disclosure, according to the closure of the container lid of the container body, inductive coupling between the first induction coil and the second induction coil of the container body may be performed. 
     In the blender of the present disclosure, power may be generated in the second induction coil by inductive coupling between the first induction coil of the main body and the second induction coil of the container body, and the generated power may be used to form an electromagnet and generate a magnetic field. 
     In the blender of the present disclosure, when the container lid of the container body is closed, a detection module disposed in the container body may detect the closure of the container lid, and when the closure of the container lid is detected by the detection module, inductive coupling between the first and second induction coils may be performed. 
     In the blender of the present disclosure, the detection module mounted to the upper part of the container body and the second induction coil mounted to the lower part of the container body may be electrically connected to each other through a conductive member made of a transparent material disposed from the upper part of the container body to the lower part thereof in the longitudinal direction of the container body. 
     In the blender of the present disclosure, a transparent electrode film (ITO) may be used as the conductive member, and the conductive member may be disposed in the longitudinal direction of the transparent container body from the upper part of the container body to the lower part thereof. 
     In the blender of the present disclosure, the first end of the transparent electrode film may be electrically connected to the detection module by a first connector which is detachable, and the second end of the transparent electrode film may be electrically connected to the second induction coil by a second connector which is detachable. 
     In the blender of the present disclosure, the first induction coil and the second induction coil may be disposed to be parallel to each other by facing each other such that the first induction coil and the second induction coil have the same center points, so inductive coupling between the first and second induction coils may be effectively performed. 
     In the blender of the present disclosure, the first and second induction coils may be configured to be patterned on first and second PCB substrates, respectively, so as to be disposed to have easy and simple configuration. 
     In the blender of the present disclosure, when the container body is mounted to the main body, the first and second PCB substrates may be installed to be parallel to each other by facing each other, such that the first and second induction coils patterned on the first and second PCB substrates, respectively, have the same center points, so inductive coupling between the first and second induction coils may be effectively performed. 
     In the blender of the present disclosure, the first and second PCB substrates may be attached to and detached from the main body and the container body, respectively, so inductive coils may be easily and simply replaced. 
     In the blender of the present disclosure, the container body may include an electromagnet on a lower end thereof, and the main body may include a sensor on an upper end thereof such that the sensor detects a magnetic field generated in the electromagnet, and accordingly, even a simple configuration allows the sensor to detect the magnetic field. 
     In the blender of the present disclosure, when a sensor detects a magnetic field, the main body may detect the closure of the container lid of the container body and may operate. 
     Advantageous Effects 
     The blender according to the present disclosure has the following effects. 
     First, in the blender of the present disclosure, the second induction coil may be disposed on the lower part of the container body, and the first induction coil may be disposed on the upper part of the main body, and thus according to the closure of the container lid, only one-time inductive coupling between the first and second induction coils may be performed, thereby realizing simple control and operation and preventing interference of a magnetic field between the induction coils compared to a prior art. 
     Second, in the blender of the present disclosure, a module and a device configured to detect the closure of the container lid of the container body may be installed inside the container body and the main body, thereby preventing a detection error or contamination due to external contaminants such as water or food. 
     Third, in the blender of the present disclosure, for electrical connection between modules, the transparent electrode film (ITO) may be used to be disposed inside and outside of the container body, thereby maintaining the design of the transparent container body. 
     Fourth, in the blender of the present disclosure, an electromagnet and a magnetic field sensor may be used when detecting the closure of the container lid of the container body, thereby accurately detecting the closure of the container lid of the container body with low power. 
     Fifth, in the blender of the present disclosure, the first and second induction coils may be patterned on PCB substrates, respectively, thereby realizing easy and simple configuration 
     Sixth, in the blender of the present disclosure, the first and second induction coils mounted to the main body and the container body, respectively, may be attached thereto and detached therefrom, thereby enabling easy mounting and convenient replacement. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view of an exterior of a blender according to an embodiment of the present disclosure. 
         FIG. 2  is a front view of the blender. 
         FIG. 3  is a vertical sectional view of the blender. 
         FIG. 4  is a perspective view of a main body which is a component of the blender according to the embodiment of the present disclosure. 
         FIG. 5  is an exploded perspective view of the main body. 
         FIG. 6  is an exploded perspective view of a container body which is a component of the blender according to the present disclosure. 
         FIG. 7  is a perspective view of an inner container body according to the present disclosure seen at a different angle. 
         FIG. 8  is a detailed view of a detection module of the container body. 
         FIG. 9  is an exploded perspective view of a second coil PCB module of the container body seen from a lower side thereof. 
         FIG. 10  is a view schematically illustrating the configuration of a portion of the blender according to the embodiment of the present disclosure. 
         FIG. 11  is a detailed view of the upper surface of a first coil PCB module of the main body. 
         FIG. 12  is a detailed view of the lower surface of the second coil PCB module of the container body. 
         FIG. 13  is a view schematically illustrating arrangement between the first and second coil PCB modules. 
         FIG. 14  is a view illustrating an example of an equivalent circuit diagram of the blender of  FIG. 10 . 
         FIG. 15  is a flowchart illustrating a process in which the main body detects the closure of a container lid according to the embodiment of the present disclosure. 
     
    
    
     MODE FOR INVENTION 
     Advantages and features of the present disclosure and a method of achieving them will become apparent by referring to embodiments described below in detail in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are only provided to fully inform those of ordinary skill in the art to which the present disclosure belongs of the scope of the invention so that the disclosure of the present disclosure is complete. The present disclosure is defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification. 
     Hereinafter, a blender of the present disclosure will be described in detail with reference to the accompanying drawings. 
       FIG. 1  is a perspective view of an exterior of a blender according to an embodiment of the present disclosure,  FIG. 2  is a front view of the blender, and the blender, and  FIG. 3  is a vertical sectional view of the blender. 
     Referring to the drawings, the blender  1  according to the embodiment of the present disclosure may include a main body  30  disposed on a foundation surface, and a container body  10  seated on the upper part of the main body  30 . 
     A motor assembly  50  for operating the blender  1 , electrical devices including a control PCB module  60 , and components may be disposed inside the main body  30 . 
     The main body  30  may be provided with a manipulation part  40  and  310   b  for manipulating the operation of the blender  1 , and a display part  310   a  for displaying the operation thereof. 
     The main body  30  may be configured to have a hexahedral shape as a whole, and a seating part  301  may be provided on the upper surface of the main body  30  so as to seat the container body  10  on the seating part  301 . The seating part  301  may be configured such that the container body  10  is attached to and detached from the seating part  301  in a vertical direction. 
     The exterior of the main body  30  may be constituted by an outer casing  31  which is made of metal or has a metal texture, and the outer casing  31  may be configured to have a hexahedral shape having an open lower surface. 
     An inner casing  32  may be formed in the outer casing  31 , and space in which the motor assembly  50  and the control PCB module  60  are mounted may be defined inside the inner casing  32 . 
     A knob  40  may be provided on the front surface of the main body  30  such that a user sets the operation of the blender  1 . The knob  40  may protrude from the front surface of the main body  30  and may manipulate and set the operation of the blender  1  by being rotated. 
     The display part  310   a  may be provided on the upper surface of the main body  30  so as to display the operation state of the blender  1 . The display part  310   a  may be configured as at least one seven-segment display. 
     A touch manipulation part  310   b  may be provided on the upper surface of the main body  30  such that the start or stop of the operation of the blender  1  can be manipulated. In order to manipulate the blender  1 , the manipulation part  40  and  310   b  may include at least any one of the knob  40  and a touch module (not shown). 
     The seating part  301  may be formed on the upper surface of the main body  30 . The seating part  301  may protrude from the upper surface of the main body  30 , and a portion of the seating part  301  may be inserted into the lower surface of the container body  10  so as to stably support the container body  10 . 
     When the container body  10  is seated on the seating part  301 , the motor assembly  50  may be coupled to a blade module  14  provided in the container body  10  and may transmit a rotational force to the blade module  14 . 
     The seating part  301  may have an appearance formed of the same material as the outer casing  31 . The seating part  301  may be formed of a metal material or a material having a metal texture to have a sense of unity with the appearance of the main body  30  as a whole. 
     The motor assembly  50  may be mounted inside the main body  30  located under the seating part  301 . The motor assembly  50  is intended to rotate the blade module  14  installed inside the container body  10 , and may drive a motor in the motor assembly  50  to rotate the blade module  14  at high speed. 
     The motor assembly  50  may control the rotation speed of the motor according to the manipulation of the knob  40  such that the rotation speed of the blade module  14  can be controlled. 
     A first coil PCB module  310  may be disposed on a first side of the upper surface of the seating part  301 . The first coil PCB module  310  may include a first PCB substrate on which a first induction coil is patterned by being wound multiple times. The first coil PCB module  310  may be connected to the control PCB module  60  and may receive power from the control PCB module  60 . 
     The first PCB substrate may be attached to and detached from the main body  30 . The attachment and detachment of the first PCB substrate may be enabled by the attachment and detachment of the first coil PCB module  310 . 
     In addition, the first PCB substrate and the first induction coil may also be replaced by replacing the first coil PCB module  310 . 
     A magnetic sensor  106  configured to sense a magnetic field may be installed on a second side of the upper surface of the seating part  301 . The magnetic sensor  106  may detect a magnetic field generated from the outside, and may transmit a sensing signal to the control PCB module  60 . 
     The motor assembly  50  may include a motor therein. The upper end of the motor assembly  50  may be connected to the blade module  14  located at the lower end of the container body  10 . A cooling fan  55  may be provided on the lower end of the motor assembly  50 . 
     The cooling fan  55  may be configured such that multiple fan blades  552  are radially disposed on the upper surface of a fan plate  551  having a shape of a plate, and during the operation of the motor assembly  50 , may rotate simultaneously with the blade module  14  such that cold air introduced in the axial direction of the cooling fan  55  is radially discharged, so the flow of the cold air in the main body  30  may be effectively forced. 
     Multiple control PCB modules  60  may be disposed on the inner wall surface of the inner casing  32  constituting the inner side surface of the main body  30 . The control PCB module  60  may include multiple control PCB modules, and the multiple control PCB modules may be disposed on the circumference of the inner side surface of the main body  30 , that is, on the front, rear, left, and right surfaces thereof, respectively. 
     The control PCB module  60  may include multiple controllers (not shown) capable of controlling the operation of the main body  30  and the container body  10 . These controllers may be provided by mounting a MYCOM (a microprocessor) to a PCB substrate in the form of an on-chip, and may include a program and software necessary for controlling the main body  30  and the container body  10 . 
     The container body  10  may be configured as a cylindrical shape corresponding to the outer diameter of the seating part  301 , and may have an open upper surface, so the container body may have space therein in which food is received. 
     The container body  10  may be formed of a transparent material such as glass or materials like glass through which the inner portion of the container body  10  can be seen. 
     The container body  10  may have the blade module provided at the center of the inner lower surface thereof. The blade module  14  may include multiple blades  141  and may be connected to the motor assembly  50 . Accordingly, when the motor assembly  50  operates in a state in which the container body  10  is seated on the main body  30 , the blades  141  may rotate and grind or cut food contained inside the container body  10 . 
     Multiple inner guides  121  may be provided in the container body  10  to guide food that is rotated. Each of the inner guides  121  may extend by a predetermined length upward from the lower end of the inner side surface of the container body  10 . 
     Meanwhile, a second coil PCB module  110  may be disposed on a first side of the lower end of the container body  10 . The second coil PCB module  110  may include a second PCB substrate on which a second induction coil is patterned by being wound multiple times. The second coil PCB module  110  may be disposed at a position vertically corresponding to the first coil PCB module  310 . Particularly, the first induction coil and the second induction coil may be preferably disposed at positions opposite to each other. 
     The second PCB substrate may be attached to and detached from the container body  10 . The attachment and detachment of such a second PCB substrate may be enabled by the attachment and detachment of the second coil PCB module  110 . 
     Furthermore, the second PCB substrate and the second induction coil may also be replaced by replacing the second coil PCB module  110 . 
     An electromagnet module  105  configured to generate a magnetic field may be disposed on a second side of the container body  10 . When receiving current, the electromagnet module  105  may generate a magnetic field, and the magnetic sensor  106  may detect such a magnetic field. 
     A spout  15  through which crushed food is poured may protrude from the upper end of the container body  10 , and a handle  13  may be provided at a side facing the spout  15  by protruding therefrom. 
     The handle  13  may protrude from the upper end of the container body  10  to the outside and then may extend downward such that a user can lift or carry the container body  10 . The protruding end portion of the handle  13  may be located on the same extension line as the side end of the main body  30 . 
     A detection module  151  configured to detect the closure of a container lid  20  may be installed on the inner side of the container body  10  to which the handle  13  is coupled. The detection module  151  may be embodied as a PCB substrate, and may include a switch. 
     The detection module  151  may detect the closure of the container lid  20  in such a manner that the switch provided therein operates according to the closure of the container lid  20 , and may determine whether to perform inductive coupling between the first and second coil PCB modules  310  and  110 . 
     That is, when the detection module  151  detects the closure of the container lid  20  of the container body  10 , current transmission between the first and second coil PCB modules  310  and  110  may be performed, but when the detection module  151  does not detect the closure of the container lid  20 , current transmission between the first and second coil PCB modules  310  and  110  may not be performed. 
     The detection module  151  and the second coil PCB module  110  may be electrically connected to each other by a conductive member  161 . The conductive member  161  may be electrically connected to the detection module  151  in a first end thereof, and may be electrically connected to the second coil PCB module  110  in a second end thereof by extending from the upper end of the container body  10  to the lower end thereof. 
     The detection module  151  and the second coil PCB module  110  may be provided with first and second connectors  152  and  111 , respectively, for effective electrical connection to the conductive member  161 . By using the first and second connectors  152  and  111 , the detection module  151  and the second coil PCB module  110  may be easily attached to and detached from the conductive member  161 . Accordingly, the detection module  151 , the second coil PCB module  110 , and the conductive member  161  may be more easily attached to and detached from the blender  1 , and replacement thereof may also be easy. 
     The conductive member  161  may be in contact with the inner or outer surface of the container body  10 . When being in contact with the outer surface, the conductive member  161  may be coated with a predetermined coating material to be fixedly attached to the outer surface. 
     The conductive member  161  may be formed of a transparent material such that the design of the container body  10  of the transparent material can be maintained. 
     The blender  1  according to the embodiment of the present disclosure may include the container lid  20 . 
     The container lid  20  may shield the open upper surface of the container body  10 , and a user may open the open upper surface of the container body  10  by separating the container lid  20  from the container body  10 . 
     The open upper surface of the container body  10  may be closed (referred to as the closure of a container lid) or opened (referred to as the opening of the container lid) by the container lid  20  such that the open upper surface of the container body  10  may be closed and opened. 
     The container lid  20  may include a container lid handle  21 . 
     A triggering member  210  turning on/off the switch of the detection module  151  may be arranged on the inner surface of a side of the container lid  20 . When the triggering member  210  approaches the detection module  151  within a predetermined distance, the switch provided in the detection module  151  may be turned on. Contrarily, when the triggering member  210  moves away from the predetermined distance, the switch may be turned off. 
     Meanwhile, as described above, the blender  1  according to the embodiment of the present disclosure may be operated by the manipulation of the knob  40  and the touch manipulation part  310   b , but may be configured to be selectively operated only under a specific condition. 
     For example, the blender  1  according to the embodiment may be operated only in the state in which the container lid  20  closes the container body  10 , that is, in the state of the closure of the container lid. This is because when the blender  1  operates in the open state of the container lid, accidents may occur due to the blades  141 , which are sharp, and food contained in the container body  10  may be ejected to the outside. 
       FIG. 4  is a perspective view of the main body which is a component of the blender according to the embodiment of the present disclosure, and  FIG. 5  is an exploded perspective view of the main body. 
     Referring to the drawings, the main body  30  according to the embodiment of the present disclosure may be configured to have a cuboid shape, and may have a structure in which the seating part  301  protrudes on the upper surface of the main body  30  to seat the container body  10  thereon, and the knob  40  by which the operation of the blender  1  is controlled is disposed on the front surface of the main body  30 . 
     As for the overall structure of the main body  30 , the outer casing  31  may be mounted to the outer side of the main body  30  to constitute the exterior of the main body  30 . The outer casing  31  may be formed of a metal material such as stainless steel and may be formed of materials having plate shapes, which are bent and joined to each other, thereby providing the shape of a very clean and rigid appearance. 
     The seating part  301  may have a two-step shape, and an entire appearance thereof may be constituted by a first seating part decoration  314 , a second seating part decoration  316 , and a lower decoration  315 . 
     The first seating part decoration  314  and the second seating part decoration  316  may be formed of the same material as the outer casing  31  or of a material having the same texture as the outer casing  31 . 
     The lower decoration  315  may be formed of a plastic or rubber material, and may be formed in a ring shape. During the mounting of the first seating part decoration  314 , the lower part  315  may fill space between the first seating part decoration  314  and the outer casing  31  such that no gap is visible. 
     A first exterior material  331  may be mounted to the circumference of the side surface of the first seating part decoration  314 . Such a first exterior material  331  may be formed of a stainless material and may protect the first seating part decoration  314 . 
     The first seating part decoration  314  and the second seating part decoration  316  may have predetermined heights and may be formed in ring shapes as a whole when viewed from the top. The second seating part decoration  316  may have a smaller diameter than the first seating part decoration  314 , and may be disposed at the center of the first seating part decoration  314 . 
     A seating packing  332  may be disposed at the outskirt of the second seating part  316  arranged at the center of the upper surface  325  of the first seating part  314 . The seating packing  332  is intended to give a sense of stability when the container body  10  is seated on the seating part  301 , and may be formed of, for example, a rubber material or a silicone material. 
     The second seating part decoration  316  may have a circular shape as a whole when seen from the top and may be configured to have a portion protruding laterally. 
     An insertion space  317  may be defined in the center portion of the upper surface of the second seating part decoration  316 , and a first seating groove  321  and a second seating groove  322  may be formed on the circumference of the upper surface of the second seating part decoration  316 . A third seating groove  323  and a fourth seating groove  324  may be selectively formed on the upper surface of the second seating part decoration  316 . 
     The first coil PCB module  310  may be seated in the first seating groove  321 . A photosensor  311  may be seated in the second seating groove  322 . A Hall sensor  312  may be selectively seated in the third seating groove  323  so as to detect the type of the container body  10  seated on the main body  30 , and a reed switch  313  may be seated in the fourth seating groove  324  so as to detect whether the container body  10  is seated. 
     The first coil PCB module  310 , the photosensor  311 , the Hall sensor  312 , and the reed switch  313  may be attached to and detached from the first, second, third, and fourth seating grooves  321 ,  322 ,  323 , and  324 , respectively. 
     When the container body  10  is seated on the main body  30 , the Hall sensor  312  may detect a magnet (not shown) attached to the lower part of the container body  10  according to the type of the container body  10  and may detect the type of the container body  10 . The magnitude of the magnetic force of a magnet may be different for each type of the container body  10 , and accordingly, the type of the container body  10  may be detected by using the magnitude of a magnetic force detected by the Hall sensor  312 . 
     When the container body  10  is seated on the main body  30 , the reed switch  313  may detect a magnet (not shown) mounted to the lower part of the container body  10  and may detect whether the container body  10  is seated. When the magnet approaches the reed switch  313 , the reed switch  313  may be turned on to detect the approaching of the magnet, and through the detection of the approaching of the magnet, the seating of the container body  10  may be detected. 
     While the first coil PCB module  310  and the photosensor  311  are seated, and while the Hall sensor  312  and the reed switch  313  are selectively seated, a cover  114  may be coupled to the upper part of the second seating part decoration  316 . 
     The cover  114  may hold and protect the first coil PCB module  310 , the photosensor  311 , the Hall sensor  312 , and the reed switch  313 , and may be formed of a material having a magnetic field penetration function such that the photosensor  311  or the Hall sensor  312  can sense light or a magnetic field through the cover  114 . 
     While the cover  114  is coupled to the second seating part decoration  316 , a second exterior material  318  may be mounted to the circumference of each of the side surfaces of the cover  114  and the second seating part decoration  316 . 
       FIG. 6  is an exploded perspective view of the container body which is a component of the blender according to the embodiment of the present disclosure,  FIG. 7  is a perspective view illustrating the coupled structure of the inner container body and a handle cover seen at a different angle,  FIG. 8  is a detailed view of the detection module of the container body, and  FIG. 9  is an exploded perspective view of the second coil PCB module of the container body seen from a lower side thereof. 
     Referring to the drawings, the container body  10  according to the embodiment may be configured in a cylindrical shape having the open upper surface. The blade module  14  may be mounted to the lower surface of the container body  10 , and the container lid  20  may be detachably mounted to the open upper surface of the container body  10 . 
     The container body  10  may be formed of a material such as glass, Tritan, or transparent plastic, etc. to check the state of food therein during the operation of the blender  1 . 
     The container body  10  may include the outer container body  11  constituting an outer shape thereof, and the inner container body  12  having inner space in which food is received. 
     The inner container body  12  and the outer container body  11  may be coupled to each other and may constitute the overall shape of the container body  10  such that the container body  10  has a double wall structure. 
     The inner container body  12  may be spaced apart from the outer container body  11 , which may define space between the outer container body  11  and the inner container body  12 . The inner container body  12  may have a diameter decreasing gradually downward. The lower part of the inner container body  12  may be configured to be inclined or round toward the blade module  14  such that food in the container body  10  may be directed to the blade module  14 . 
     The outer container body  11  may have a cylindrical shape having upper and lower ends which have the same outer diameters, respectively, such that the appearance of the container body  10  looks neat. 
     The outer diameter of the outer container body  11  may be configured to be the same as the outer diameter of the seating part  301 , and while the container body  10  is mounted to the main body  30 , the main body  30  and the container body  10  may be seen as being integrated with each other. 
     A receiving part (not shown) of the main body may be formed on the lower surface of the outer container body  11 . The receiving part  102  of the main body may have space recessed upward from the lower surface of the outer container body  11  such that the second seating part decoration  316  described above can be inserted into the space. Due to the coupling of the receiving part  102  of the main body to the second seating part decoration  316 , the state of the container body  10  mounted to the seating part  301  may be maintained. 
     A middle handle  132  may be formed at a side of the upper end of the outer container body  11  by protruding therefrom. When the middle handle  132  is formed by protruding, an inner space may be defined at the side of the upper end of the outer container body  11  to receive the detection module  151 . 
     An outer handle  131  may be coupled to the outer side of the middle handle  132 , and an inner handle  133  may be coupled to the inner side of the middle handle  132  so as to constitute the handle  13  as a whole. 
     The upper end of the inner container body  12  may be configured to have an inclined surface  122  having an inner diameter decreasing gradually downward. Accordingly, in a process in which the container lid  20  is inserted to the open upper surface of the container body  10 , the container lid  20  may be configured to seal the inner container body  12  while being gradually brought into close contact with the inner container body  12 . 
     The upper inclined surface of the inner container body  12  may be configured from the upper end of the container body  10  to the upper end of the inner guide  121 , and may be configured along the circumference of the inner surface of the container body  10 . 
     The inner guide  121  may be formed on the inner side surface of the inner container body  12 . The inner guide  121  may extend from the inclined surface  122  to the bottom surface of the inner container body  12 . 
     The blade module  14  may be disposed at the inner lower part of the inner container body  12 , and may be configured such that multiple blades  141  are inserted into the upper part of a base  141   a  and may be fastened thereto by a nut  141   b  from the upper side. 
     The second coil PCB module  110  may be disposed on the lower part of the inner container body  12 . As described above, the second coil PCB module  110  may be embodied with the second induction coil  201  patterned on a PCB substrate. The second induction coil  201  may be wound multiple times on the PCB substrate in a spiral shape relative to a center point  201   a  thereof. 
     The electromagnet module  105  may be disposed on a side of the lower surface of the second coil PCB module  110 . The electromagnet module  105  may be electrically connected to the second induction coil to be described later, and may generate a magnetic field when receiving power from the second induction coil. 
     The second coil PCB module  110  may be fixedly mounted to a lower plate  113 , and while the second coil PCB module  110  is fixedly mounted to the lower plate  113 , the cover  114  may be coupled to the lower plate  113 . 
     In addition, the second connector  111  may be installed on a side of the upper surface of the second coil PCB module  110  by protruding therefrom such that the second connector  111  electrically connects the second induction coil  201  with the conductive member  161 . 
     A receiving part  116  having an open upper surface may be installed on the upper surface of the cover  114  by protruding therefrom to receive the second connector  111  provided under the cover  114 , and the conductive member  161  may be coupled to the second connector  111  exposed through the receiving part  116  to be electrically connected to the second coil PCB module  110 . 
     The detection module  151  may be installed on the inner side of the upper end portion of the container body  10  to which the handle  13  is coupled. The detection module  151  may be embodied as a PCB and may include a switch which can be turned on/off as described later. The switch may be switched on only under a specific condition. 
     The detection module  151  may detect whether the container lid  20  closes the container body  10 . Specifically, when the container lid  20  closes the container body  10 , the switch located inside the detection module  151  may be turned on by the triggering member  210  installed inside the container lid  2 . 
     Accordingly, in the embodiment, when the switch in the detection module  151  is turned on, the detection module  151  may detect the closure of the container lid  20 . 
     The detection module  151  may be seated in a groove  153  formed thereunder and may maintain stability thereof. The first connector  152  may be mounted to the detection module  151  such that the detection module  151  is electrically connected with the conductive member  161 . 
     The conductive member  161  may be disposed between the outer container body  11  and the inner container body  12 . The conductive member  161  may be disposed by extending in the longitudinal direction of the container body  10  from the upper part of the container body  10  to the lower part thereof. 
     The conductive member  161  may be formed of a transparent material to secure and maintain the transparency of the outer container body  11  and the inner container body  12  formed of a material such as glass, Tritan, or transparent plastic, etc. In the embodiment, the conductive member  161  may include a transparent electrode film (ITO). 
     The first end of the conductive member  161  may be electrically connected to the detection module  151  by the first connector  152 , and the second end of the conductive member  161  may be electrically connected to the second coil PCB module  110  by the second connector  111 . Specifically, the first end of the conductive member  161  may be connected to the switch provided in the detection module  151 , and the second end of the conductive member  161  may be connected to the second induction coil  201  provided in the second coil PCB module  110 . 
     The conductive member  161  may be in contact with the inner surface of the outer container body  11  or with the outer surface of the inner container body  12  and may extend from the upper part of the container body to the lower part thereof. 
     The upper end part of the conductive member  161  may be installed by bending in a section according to the shapes of the outer container body  11  and the inner container body  12 . 
     The triggering member  210  may be mounted to the inside of a side surface of the container lid  20  such that the triggering member  210  is located at a position corresponding to the detection module  151 . When the container lid  20  closes the container body  10 , the triggering member  210  may be installed to approach the detection module  151  within a predetermined distance. 
     When the triggering member  210  approaches the detection module  151  within a predetermined distance, the switch of the detection module  151  may be turned on. 
     Specifically, when the container lid  20  closes the container body  10 , the triggering member  210  installed inside the container lid  20  may approach the detection module  151  within a predetermined distance, and the switch of the detection module  151  may be turned on. When the container lid  20  is opened, the triggering member  210  of the container lid  20  may move away by a predetermined distance from the detection module  151  and the switch of the detection module  151  may be turned off. 
       FIG. 10  is a partial cross sectional view schematically illustrating the configuration of a portion of the blender according to the embodiment of the present disclosure,  FIG. 11  is a detailed view of the upper surface of the first coil PCB module of the main body,  FIG. 12  is a detailed view of the lower surface of the second coil PCB module of the container body, and  FIG. 13  is a view schematically illustrating arrangement between the first and second coil PCB modules. 
     Referring to the drawings, the first coil PCB module  310  may be installed on a first side of the upper part of the main body  30  of the blender  1  according to the embodiment of the present disclosure. 
     The first coil PCB module  310  may be embodied with the first induction coil  101  patterned on a PCB substrate. The first induction coil  101  may be wound multiple times on the PCB substrate in a spiral shape relative to a center point  101   a  thereof. 
     The main body  30  may include a power supply part  103  therein. The power supply part  103  may apply current to the first induction coil  101 . When current is applied to the first induction coil  101 , a magnetic field may be generated in the first induction coil  101 . 
     The power supply part  103  may be mounted to the first coil PCB module  310 , or to the control PCB module  60 . 
     The power supply part  103  may change the intensity of the current applied to the first induction coil  101 , and the intensity of the magnetic field of the first induction coil  101  may be changed by the change of the intensity of the current. 
     The magnetic sensor  106  for sensing a magnetic field may be included in a second side of the upper part of the main body  30 . Although the magnetic sensor  106  may be installed on the upper surface of the first coil PCB module  310 , the position of the magnetic sensor  106  is not limited thereto. 
     The main body  30  may include a controller  104  therein. The controller  104  may be connected to the motor assembly  50  described above, and may drive the motor  51  of the motor assembly  50  when the magnetic sensor  106  detects a magnetic field. The controller  104  may be mounted to the control PCB module  60  described above. 
     The second coil PCB module  110  may be installed on a first side of the lower surface of the container body  10 . 
     The second coil PCB module  110  may be embodied with the second induction coil  201  patterned on the second PCB substrate. The second induction coil  201  may be wound multiple times on the PCB substrate in a spiral shape relative to the center point  201   a  thereof. 
     Like the embodiment illustrated in the drawing, when the container body  10  is seated on the main body  30 , the first induction coil  101  of the main body  30  and the second induction coil  201  of the container body  10  may be disposed at a predetermined interval at positions corresponding to each other. 
     Specifically, when the container body  10  is seated on the main body  30 , the first induction coil  101  and the second induction coil  201  may be concentric in the two center points  101   a  and  201   a , respectively, and may be disposed to be parallel to each other by facing each other. 
     Inductive coupling between the first induction coil  101  and the second induction coil  201  may be selectively performed under a specific condition. 
     When the intensity of current applied to the first induction coil  101  changes, a magnetic field of the first induction coil  101  may be changed, and a magnetic flux passing through the second induction coil  201  may be changed due to the inductive coupling between the first induction coil  101  and the second induction coil  201 , so an induced electromotive force may be generated in the second induction coil  201 . 
     The positions and arrangement of the first and second induction coils  101  and  201  may be determined such that the inductive coupling is effectively performed therebetween. 
     The electromagnet module  105  may be included on a second side of the lower part of the container body  10  so as to generate a magnetic field when current is applied to the electromagnet module from the outside. In the embodiment the electromagnet module  105  may be provided in the second coil PCB module  110 . 
     The second induction coil  201  of the second coil PCB module  110  and the electromagnet module  105  may be electrically connected to each other, and the electromagnet module  105  may generate a magnetic field by receiving power from the second induction coil  201 . 
     The electromagnet module  105  may be disposed at a position corresponding to the magnetic sensor  106  of the main body  30 . When a magnetic field is generated in the electromagnet module  105 , the magnetic sensor  106  may detect the magnetic field. The positions of the electromagnet module  105  and the magnetic sensor  106  may be changed. The electromagnet module  105  and the magnetic sensor  106  may be disposed at positions opposite to each other such that the magnetic sensor  106  can detect a magnetic field when the magnetic field is generated in the electromagnet module. 
     In the embodiment, the electromagnet module  105  may, for example, include a solenoid having a coil wound multiple times, and the magnetic sensor  106  may include the Hall sensor configured to detect a magnetic field generated in the electromagnet module  105 . When receiving current from the second induction coil  201 , the solenoid may generate a magnetic field in a surrounding area thereof, and the magnetic sensor  106  may detect the magnetic field in real time, and may also detect the change of the detected magnetic field. 
     The detection module  151  may be mounted to the upper end part of the container body  10 . In the embodiment, in the upper end part the container body  10 , the detection module  151  may be mounted between the outer container body  11  and the inner container body  12 . The detection module  151  may be embodied with the switch  151   a  to be described later mounted to a PCB substrate. 
     The triggering member  210  may be mounted on a side of the side surface of the container lid  20 . When the container lid  20  closes the container body  10 , the triggering member  210  may be disposed to approach the detection module  151  located substantially at the same height as the triggering member  210  within a predetermined distance. 
     When the container lid  20  closes the container body  10 , the triggering member  210  of the container lid  20  may approach the detection module  151  within a predetermined distance, and the switch  151   a  of the detection module  151  may be turned on. Accordingly, the detection module  151  may function to detect the closure of the container lid. 
     In the embodiment, the triggering member  210  may be a magnetic body, and the switch  151   a  may be a reed switch. 
     In the embodiment, the reed switch may be turned off in an initial stage, and when the magnetic body approaches the reed switch within a predetermined distance, the reed switch may be turned on. 
     The detection module  151  and the second coil PCB module  110  may be electrically connected to each other through the transparent conductive member  161 . Specifically, the transparent conductive member  161  may electrically connect the switch  151   a  of the detection module  151  with the second induction coil  201  of the second coil PCB module  110 . 
     In the embodiment, the conductive member  161  may include a transparent electrode film (ITO). The transparent electrode film (ITO) may be a transparent material capable of conducting current. 
     The transparent electrode film (ITO) may be installed at various positions. According to the embodiment, the transparent electrode film may be installed between the outer container body  11  and the inner container body  12 . The transparent electrode film may be preferably attached to the inner surface of the outer container body  11  or on the outer surface of the inner container body  12 . 
     For another example, the transparent electrode film (ITO) may be attached to the outer surface of the outer container body  11 , and in this case, the transparent electrode film (ITO) may be coated with a transparent coating material such that the transparent electrode film is protected from the outside. 
     The transparent electrode film (ITO) may be disposed in the longitudinal direction of the container body  10  from the detection module  151  of the upper part of the container body  10  to the second coil PCB module  110  of the lower part of the container body  10 . Accordingly, due to the application of such a transparent electrode film (ITO), the transparency of the transparent container body  10  may be maintained. 
     Meanwhile, the second induction coil  201 , the switch  151   a , and the electromagnet module  105  may be electrically connected in series to each other. Accordingly, according to the turn on/off of the switch  151   a , power may be supplied and interrupted from the second induction coil  201  to the electromagnet module  105 . 
       FIG. 14  is a view illustrating an example of an equivalent circuit diagram of the blender of  FIG. 10 . 
     Referring to the drawing, in the main body  30 , the first induction coil  101  may be connected to the power supply part  103 , and the magnetic sensor  106  may be connected to the controller  104  and the motor  51 . 
     The power supply part  103  may supply current to the first induction coil  101 , and a magnetic field may be generated in the first induction coil  101  by the supplied current. 
     The power supply part  103  may control the intensity of current supplied to the first induction coil  101  and may induce the change of the magnetic field of the first induction coil  101 . 
     In the container body  10 , the second induction coil  201  may be connected to the detection module  151  and the electromagnet module  105 . 
     In this case, in the embodiment, the second induction coil  201  and the detection module  151  may be connected to each other by the conductive member  161  made of a transparent material. 
     The detection module  151  may include the switch  151   a . In the embodiment, such a switch  151   a  may include a reed switch. 
     Operation in such an equivalent circuit diagram will be described. 
     In a state in which the container lid  20  does not close the container body  10 , the detection module  151  may not detect the triggering member  210 , so the turn-off state of the switch  151   a  may be maintained. 
     In a state in which the switch  151   a  is turned off, the second induction coil  201 , the switch  151   a , and the electromagnet module  105  may not form a closed circuit, so inductive coupling between the first induction coil  101  and the second induction coil  201  may not be performed. 
     When the container lid  20  closes the container body  10 , the triggering member  210  may approach the detection module  151  within a predetermined distance, and the switch  151   a  of the detection module  151  may be turned on by the triggering member  210 . 
     When the switch  151   a  is turned on, the second induction coil  201 , the switch  151   a , and the electromagnet module  105  connected in series to each other may form a close circuit. 
     As described above, when the closed circuit is formed, inductive coupling between the first induction coil  101  and the second induction coil  201  may be performed, and due to a voltage induced in the second induction coil  201 , current may be supplied to the electromagnet module  105 . 
     The electromagnet module  105  may generate a magnetic field according to the supply of current thereto. Accordingly, the magnetic sensor  106  may detect a magnetic field generated in the electromagnet module  105 . 
     As illustrated in the drawing, as required, power selectively induced in the second induction coil  201  may be converted to power required for the electromagnet module  105  through a conversion module (not shown) to be supplied to the electromagnet module  105 . 
     When receiving a signal, the magnetic sensor  106  may transmit the signal to the controller  104 . The controller  104  may detect the closure of the container lid by receiving such a signal, and may drive the motor  51  only when detecting the closure of the container lid. 
     Accordingly, in the embodiment, in a state in which the container lid is opened, the magnetic sensor  106  may not receive a signal, so the controller  104  may not drive the motor  51 , but only in a state in which the container lid is closed may the magnetic sensor  106  receive a signal, so the controller  104  may drive the motor  51 . 
     Accordingly, the blender  1  may operate only under the specific condition of the closure of the container lid. 
       FIG. 15  is a flowchart illustrating a process in which the main body detects the closure of the container lid according to the embodiment of the present disclosure. 
     Referring to  FIG. 15 , in the embodiment, when the container lid  20  closes the container body  10  at S 101 , the switch  151   a  of the detection module  151  may be turned on by the triggering member  210  mounted inside a side surface of the upper end of the container lid  20  at S 103 . 
     As described above, when the switch  151   a  is turned on, the switch  151   a , the second induction coil  201 , and the electromagnet module  105  may form a close circuit, so inductive coupling between the first induction coil  101  and the second induction coil  201  may be performed at S 105 . 
     Power may be generated in the second induction coil  201  due to such inductive coupling at S 107 , and a current generated by the generated power may be supplied to the electromagnet module  105  at S 109 . 
     The electromagnet module  105  may generate a magnetic field by the current supplied thereto at S 111 , and the magnetic sensor  106  may detect the magnetic field at S 113 . 
     Accordingly, when the magnetic sensor  106  detects the magnetic field, the controller  104  of the main body  30  may detect the closure of the container lid of the container body  10  at S 115 . 
     The embodiments of the present disclosure have been described above with reference to the accompanying drawings, but the blender of the present disclosure is not limited to the above embodiments and may be manufactured in a variety of different forms. Those skilled in the art to which the present disclosure belongs will understand that the blender of the present disclosure may be embodied in other specific forms without changing the spirit or essential features of the present disclosure. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.