Patent Publication Number: US-2022225836-A1

Title: Blender

Description:
TECHNICAL FIELD 
     The present disclosure relates to a blender and, more particularly, to a blender capable of forcing air to flow inside a motor assembly, and thus effectively dissipating heat. 
     BACKGROUND ART 
     Generally, a blender is also referred to as a mixer. The blender is used primarily to chop food accommodated in a container body into small pieces or mix the food by rotating a blade by a rotational force generated by a motor. 
     In a normal blender, a main body into which a motor operating by electricity is built is positioned below, and a container body in which food is accommodated is seated on the top of the main body. A blade for chopping the food into small pieces or mixing the food is provided inside the container body and is rotated by a rotational force generated by the motor. 
     After the food that needs to be chopped into small pieces is put into the container body, an operational button or a knob of the main body is used to drive the motor. The blade is rotated by the rotational force generated by the motor, and thus the food inside the container body is chopped into small pieces or mixed. 
     In recent years, various blenders of this type have been developed to satisfy the user&#39;s need for food in their busy everyday life. For example, small-sized hand-held blenders or large-sized high-volume blenders have been developed, and blenders capable of grinding food at a high speed have also been developed. 
     In addition, vacuum blenders capable of slicing or grinding food accommodated in a container body under vacuum for processing food in a fresher state have been available on the market. 
     Electronic components, such as a motor assembly and PCB modules, that are necessary for operation control, are mounted in these various types of blenders. However, when each of these blenders is in operation, heat occurs in the motor assembly or the PCB module, and thus component malfunction can occur. 
     For this reason, a cooling fan or the like is mounted in the blender in the related art in order to prevent the occurrence of heat and to cool the electronic components. 
     For example, a cooling fan forces air to flow inside a mixer as disclosed in Korean Patent No. 10-1713194. However, in the mixer of the related art, air does not flow through the motor assembly, and thus the cooling fan is not effective in reducing heat occurring in a coil inside the motor. 
     The blender system disclosed in WIPO Publication No. WO 2018/034979 A1 employs a configuration in which a cooling fan provided on a lower end portion of a motor shaft forces air to flow into a motor. 
     With this configuration, air flows through a motor, but other electronic components, such as PCB modules, are not properly cooled. Furthermore, hot air that circulates throughout a main body is discharged through a lateral surface of a blender. Thus, the hot air can come into contact with people. 
     SUMMARY 
     An aspect of the present disclosure, which is made to solve the problems in the related art as described above, is to provide a blender capable of discharging air that cools components inside a main body to below the main body. 
     Another aspect of the present disclosure is to provide a blender capable of forcing air introduced into a main body to pass through a PCB module and a motor assembly, and then discharging the air to below the main body. 
     Still another aspect of the present disclosure is to provide a blender capable of forcing air to flow through a motor assembly in an upward-downward direction, with a lateral surface of a motor housing of the motor assembly being blocked. 
     Still another aspect of the present disclosure is to provide a blender equipped with an air guide configured to guide flowing of air passing through a motor assembly to below a main body. 
     Technical Solution 
     A feature of a blender according to the present disclosure that accomplishes the above-described objectives is that air introduced into a main body is discharged to below a main body. Therefore, hot air is prevented from coming contact with a user. 
     In the blender according to the present disclosure, a motor housing of a motor assembly is configured in such a manner that a lateral surface is blocked. Therefore, air is prevented from flowing through the lateral surface of the motor housing, and thus flows through the motor assembly only in an upward-downward direction. 
     According to the present disclosure, an air guide is provided below the motor assembly, and guides discharging of the air flowing through the motor assembly in the upward-downward direction directly to below the main body. Therefore, the air flows through a motor in the upward-downward direction, and thus the motor is capable of being effectively cooled. 
     According to the present disclosure, a hole configured to guide introducing of outside air and a hole configured to guide discharging of the outside air are formed in a base plate and a base support, respectively. Therefore, the air smoothly flows into and flows out of the main body. 
     According to the present disclosure, the holes through which the air flows are formed into the base plate and the base support, respectively. A guidance wall and a blocking wall that guide flowing of the air only in the upward-downward direction are formed on edges, respectively, of these holes. 
     According to the present disclosure, PCB modules and a heat dissipation member are mounted along a path along which the air flows. 
     According to the present disclosure, the air guide is fastened to the base plate using a hook. Therefore, operational efficiency of the blender is improved. 
     According to the present disclosure, an airtight member is mounted between the air guide and the motor assembly. Therefore, only the air flowing through the motor assembly is forced to flow into the air guide, and thus the motor is efficiently cooled. 
     According to an aspect of the present disclosure, there is provided a blender including: a container body in which food is accommodated; and a main body provided underneath the container body and configured to support the container body; a container lid detachably mounted on an upper surface of the container body and opening and closing the top of the container body, wherein an air guide configured to guide discharging of air flowing through a motor assembly to below the main body is provided in the main body. 
     In the blender, a motor seating support configured to support the motor assembly may be formed on an upper surface of the air guide. 
     In the blender, an air hole through which air flowing through the motor assembly in an upward-downward direction flows into the air guide may be formed in the upper surface of the air guide in a manner that passes from the upper surface thereof from top to bottom. 
     In the blender, the air guide may be mounted on a base plate provided on a lower end portion of the main body. 
     In the blender, a guide seating part on which the air guide is mounted may be formed on the base plate, and a guide protrusion configured to guide mounting of the air guide may be formed on an edge of the guide seating part in a manner that protrudes upward from the edge thereof. 
     In the blender, a plurality of fastening hooks may be formed on the air guide, and a plurality of hook grooves may be formed in the base plate. Each of the fastening hooks and each of the hook grooves may be formed to shapes, respectively, that correspond to each other. With the plurality of fastening hooks and the plurality of hook grooves, the air guide and the base plate may be fixedly combined with each other. 
     In the blender, a cooling fan forcing the air to flow may be positioned inside the air guide. 
     In the blender, an air-exhaust guidance hole configured to guide discharging of the air forced by the cooling fan to flow may be formed in a first end portion of the base plate in a manner that passes through the first end portion thereof from top to bottom. 
     In the blender, an air-intake guidance hole configured to guide flowing of outside air introduced into the main body may be formed in a second end portion of the base plate in a manner that passes through the second end portion thereof from top to bottom. 
     In the blender, a base support having a space in which a wireless electric power module is accommodated may be provided underneath the base plate. 
     In the blender, an air-exhaust hole configured to guide discharging of air introduced through the air-exhaust guidance hole to the outside of the main body may be formed in a first end portion of the base support in a manner that passes through the first end portion thereof from top to bottom. 
     In the blender, an air-intake hole serving as a path along which the outside air is introduced into the main body may be formed in a second end portion of the base support in a manner that passes through the second end portion thereof from top to bottom. 
     In the blender, a guidance wall configured to block the air from flowing sideways may be formed in an edge of the air-intake guidance hole or an air-exhaust guidance hole in the base plate. 
     In the blender, a blocking wall configured to block the air from flowing sideways may be formed in an edge of the air-intake hole or the air-exhaust hole in the base support. 
     In the blender, the air guide may guide discharging of the air introduced into main body to below the main body. 
     In the blender, the motor seating support may include: a horizontal rib formed to a shape of a circular ring and configured to support a lower end portion of the motor assembly; and a vertical rib formed on the horizontal rib in a manner that protrudes upward therefrom and configured to block the motor assembly from being moved sideways. 
     In the blender, an airtight member formed of an elastic material may be provided between the motor assembly and the motor seating support. 
     In the blender, the airtight member may include a combination portion inserted into an upper portion of the vertical rib and a seating part formed on an inner circumferential surface of the combination portion in such a manner as to extend inward from the inner circumferential surface thereof and positioned on an upper surface of the horizontal rib. 
     In the blender, an upper housing and a lower housing may provide an exterior appearance of the motor assembly, and the upper housing may be closed at the lateral sides. 
     In the blender, the air-intake guidance hole in the base plate and the air-intake hole in the base support may be mounted at positions, respectively, that correspond to each other in the upward-downward direction. 
     In the blender, the air-exhaust guidance hole in the base plate and the air-exhaust hole in the base support may be mounted at positions, respectively, that correspond to each other in the upward-downward direction. 
     In the blender, a PCB module or a heat dissipation member may be mounted above the air-intake guidance hole in the base plate. Therefore, electronic components inside the main body can be efficiently cooled. 
     Advantageous Effects 
     A blender according to the present disclosure provides the following effects. 
     Firstly, in the blender according to the present disclosure, air introduced into a main body is discharged to below the main body. Therefore, hot air that results from exchanging heat with electronic components while circulating throughout a main body does not come into direct contact with a user. Thus, this provides the effect that a user can avoid undesirable contact with the hot air. 
     Secondly, in the blender according to the present disclosure, a motor housing of a motor assembly provided in the main body is configured in such a manner as to be closed at the lateral sides. That is, paths other than a path along which an electric wire passes are all blocked. Therefore, the air is prevented from flowing along a lateral surface of the motor housing and is allowed to flowing through the motor assembly only in an upward-downward direction. This provides the effect that a coil inside a motor can be efficiently cooled. 
     Thirdly, according to the present disclosure, an air guide is provided below the motor assembly. The air guide guides discharging of air flowing through the motor assembly in the upward-downward direction directly to below the main body. Therefore, all air that is introduced into the main body flows through the motor assembly, and then is forced to be discharged out of the main body. Thus, the motor can be effectively cooled. 
     Fourthly, according to the present disclosure, a hole configured to guide introducing of outside air and a hole configured to guide discharging of the outside air are formed in a base plate and a base support, respectively. This provides the effect that air can be smoothly introduced from below the main body and can be smoothly discharged to below the main body. 
     Fifthly, according to the present disclosure, an air-intake guidance hole and an air-intake hole that guide introducing of air into the main body are formed in the base plate and the base support, respectively. A guidance wall and a blocking wall that guide flowing of the air only in the upward-downward direction are formed on edges, respectively, of the air-intake guidance hole and the air-intake hole. Therefore, the outside air is introduced directly into a PCB module, a heat dissipation member, and the like inside the main body from the outside. This provides the effect that the electronic components can be efficiently cooled. 
     Sixthly, according to the present disclosure, an air-exhaust guidance hole and an air-exhaust hole that guide discharging of the air introduced into the main body back to the outside of the main body are formed in the base plate and the base support, respectively. The guidance wall and the blocking wall that guide flowing of the air only in the upward-downward direction are formed on edges, respectively, of the air-exhaust guidance hole and the air-exhaust hole. Therefore, the hot air that results from exchanging heat with the electronic components while circulating throughout the main body is directly guided by the air guide, and then is discharged to below the main body. This provides the effect that neighboring components are not affected by the hot air. 
     Seventhly, according to the present disclosure, the PCB module or the heat dissipation member is mounted along a path through which the air flows. That is, the PCB module or the heat dissipation member is mounted above the air-intake guidance hole through which the outside air is introduced. This provides the effect that cooling of the PCB module or the heat dissipation member prevents the PCB module or the heat dissipation member from malfunctioning. 
     Eighthly, according to the present disclosure, the air guide is fastened to the base plate with a hook. Therefore, operational efficiency of the blender is improved. 
     Ninthly, according to the present disclosure, an airtight member formed of rubber is mounted between the air guide and the motor assembly. Therefore, only the air flowing through the motor assembly is forced to flow to the air guide. This provides the effect that loss of the cooling air is minimized, the motor is efficiently cooled, and introduction of fresh air and discharging of the hot air are facilitated. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view illustrating a blender according to an embodiment of the present disclosure; 
         FIG. 2  is a longitudinally cross-sectional view illustrating an internal configuration of the blender according to an embodiment of present disclosure; 
         FIG. 3  is an exploded perspective view illustrating a detailed configuration of a container body that constitutes the blender according to an embodiment of the present disclosure; 
         FIG. 4  is a perspective view illustrating the container body that constitutes the blender according to an embodiment of the present disclosure, when viewed from below; 
         FIG. 5  is a perspective view illustrating a main body that constitutes the blender according to an embodiment of the present disclosure; 
         FIG. 6  is an exploded perspective view illustrating components in the upper half of the main body that constitutes the blender according to an embodiment of the present disclosure; 
         FIG. 7  is a perspective view illustrating a state where a cover is removed from the main body that constitutes the blender according to an embodiment of the present disclosure; 
         FIG. 8  is a perspective longitudinally cross-sectional view illustrating the main body that constitutes the blender according to an embodiment of the present disclosure; 
         FIG. 9  is a partial longitudinally cross-sectional view illustrating the main body that constitutes the blender according to an embodiment of the present disclosure; 
         FIG. 10  is a perspective view illustrating a state where a motor assembly that constitutes the blender according to an embodiment of the present disclosure is mounted; 
         FIG. 11  is an exploded perspective view illustrating an air guide and a base plate that constitute the blender according to an embodiment of the present disclosure, when viewed from above; 
         FIG. 12  is an exploded perspective view illustrating the air guide and the base plate that constitute the blender according to an embodiment of the present disclosure, when viewed from below; 
         FIG. 13  is an exploded perspective view illustrating the motor assembly that constitutes the blender according to an embodiment of the present disclosure; 
         FIG. 14  is a perspective view illustrating a detailed configuration of the air guide that constitutes the blender according to an embodiment of the present disclosure; 
         FIG. 15  is a perspective view illustrating a detailed configuration of an airtight member that constitutes the blender according to an embodiment of the present disclosure; and 
         FIG. 16  is a perspective view illustrating a detailed configuration of the base plate that constitutes the blender according to an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     A blender according to the present disclosure will be described in detail below with reference to the accompanying drawings. 
       FIG. 1  is a perspective view illustrating a blender according to an embodiment of the present disclosure.  FIG. 2  is a longitudinally cross-sectional view illustrating the blender to an embodiment of the present disclosure. 
     As illustrated in  FIGS. 1 and 2 , the blender according to the present disclosure is configured to include a container body  100 , a main body  500 , and the like. The container body  100  is positioned at a relatively great height and accommodates food. The main body  500  is provided underneath the container body  100  and supports the container body  100 . 
     The food is accommodated into the container body  100  and is chopped into pieces or mixed there. The main body  500  supports the container body  100 . A plurality of components that control the chopping and mixing of food in the container body  100 , supply electric power, and perform other functions are provided inside the main body  500 . 
     It is desirable that the entire container body  100  has the shape of a cylinder when viewed as a whole. The container body  100  is configured to be open at the top. Thus, the food may be inserted into and taken out of the container body  100 . 
     It is desirable that the container body  100  is made of a transparent material in such a manner that the inside thereof may be viewed from the outside. That is, the container body  100  is made of glass or transparent plastic in such a manner that a user may visually check a state of the food inside the container body  100  from the outside. 
     A blade assembly  200  is mounted on the inside at the bottom of the container body  100 . The blade assembly  200  is mounted in such a manner that a plurality of blades  206  (see  FIG. 3 ) is rotatable. The blade assembly  200  chops the food accommodated in the container body  100  into small pieces or mixes the food accommodated therein. 
     The blade assembly  200  is configured in such a manner as to be connected to the motor assembly  600  described below and to be rotatable by a rotational force generated by the motor assembly  600 . 
     It is desirable that the wall and bottom of the container body  100  are formed in a double-layered manner. That is, the container body  100  is configured to include an outer container body  110  that provides an exterior appearance of the container body  100  and an inner container body  120  that is positioned inside the outer container body  110 . The outer container body  110  and the inner container body  120  may be configured in such a manner as to be brought into contact with each other or in such a manner as to be spaced apart from each other. It is also possible that the outer container body  110  and the inner container body  120  are configured in such a manner as to be partially brought into contact with each other. 
     One or more inner guides  122  that has a predetermined length in an upward-downward direction is provided inside the container body  100 . The inner guide  122  serves to guide the rotating of the food inside the container body  100 . It is desirable that the inner guides  122  are symmetrically arranged in pairs in the forward-backward direction or in the leftward-rightward direction. 
     A handle  300  that can be gripped with the user&#39;s hand is formed on a right-side surface of the container body  100  in a manner that protrudes rightward. It is desirable that the handle  300  is formed in such a manner that the user holds the handle  300  with their hand. According to the present disclosure, an example is illustrated where an upper end portion of the handle  300  is configured in such a manner as to be integrally combined with an upper end portion of an external surface of the container body  100 . 
     A projection lip  210  is further formed on the upper portion of the external surface of the container body  100  in a manner that is opposite to the handle  300 . 
     The projection lip  210 , as illustrated, is formed on an upper portion of a left-side surface of the container body  100  and serves to guide the discharging of the small pieces of food inside the container body  100  in an easy manner to the outside. Therefore, it is desirable that the projection lip  210  is formed in such a manner that the nearer an upper end of the projection lip  210  is to the upper surface of the container body  100 , the more the upper end thereof protrudes in the leftward direction. 
     The top of the container body  100  is covered by a container lid  400 . That is, the container lid  400  is detachably mounted on the upper surface of the container body  100 , and thus closes or opens the top of the container body  100 . 
     The container lid  400  covers the top of the container body  100  in such a manner that the food does not spill out of the container body  100  to the outside, and blocks an outside foreign material from being introduced into the container body  100 . 
     The container lid  400  is configured in such a manner as to be attached on the upper surface of the container body  100  by a user pressing the container lid  400  or rotating thereof. A gasket  402  is further provided on an outer circumferential surface of the container lid  400  and bridges a gap between the container lid  400  and the container body  100 . Of course, the gasket  402  also serves to press the container lid  400  against the upper surface of the container body  100 , and thus holds the container lid  400  firmly in place. 
     A cap  450  is further provided on the container lid  400 . That is, a cover hole  401  that is a circular hole of a predetermined size is formed in a center portion of the container lid  400  in a manner that passes through the center portion thereof from top to bottom. The cap  450  is inserted into the cover hole  401  and plugs the cover hole  401 . 
     The cap  450 , as illustrated, is mounted on the center portion of the container lid  400 . The cap  450  is formed in such a manner as to have a smaller diameter than the container lid  400  when viewed as a whole. It is desirable that the cap  450  is detachably mounted on the container lid  400  by forcefully inserting the cap  450  thereinto or by rotating the cap  450 . 
     According to the present disclosure, an example is illustrated where the cap  450  is detachably mounted on the container lid  400  by rotating the cap  450 . A detailed configuration of the cap  450  is described as follows. 
     The cap  450  is detachably mounted on the container lid  400 . Thus, the user may observe the food inside the container body  100  without the need to detach the container lid  400  in a state where only the cap  450  is detached from the container lid  400 . After the cap  450  is detached, it is also possible that the food is inserted into the container body  100  or that the food inside the container body  100  is mixed using a rod or the like. 
     An upper end portion of the cap  450  is formed in such a manner as to protrude more upward than an upper end portion of the container lid  400 . Thus, the upper end portion thereof may also serve as a container lid handle that can be gripped with the user&#39;s hand when attaching or detaching the container lid  400 . 
     As illustrated, the main body  500  is formed in such a manner as to have the shape of a parallelepiped when viewed as a whole. The main body  500  is provided underneath the container body  100  and supports the container body  100 . A plurality of components including electronic components, such as the motor assembly  600  and a printed circuit board (PCB), are mounted inside the main body  500 . Of course, the main body  500  may have an exterior appearance that can vary widely whenever necessary. 
     The motor assembly  600  is positioned inside at a center portion of the main body  500 . The motor assembly  600  is supplied by electric power from the outside, and thus generates a rotational force. A blade  206  (see  FIG. 3 ) constituting the blade assembly  200  is rotated by the generated rotational force. 
     Therefore, it is desirable that a lower end of the blade assembly  200  is connected to an upper end portion of the motor assembly  600 . 
     A knob  502  is formed on a front surface of the main body  500  in a manner that it protrudes forward. The knob  502  serves to set the blender according to the present disclosure in operation. It is desirable that the knob  502  is rotatably mounted on the main body  500 . 
     The knob  502  may also be configured in such a manner as to control a rotational speed of the motor assembly  600 . That is, the knob  502  may be configured in such a manner that clockwise or counterclockwise rotation thereof changes the rotational speed of the motor assembly  600  from high to low or from low to high. 
     A touch operation unit  504  is provided on an upper surface of the main body  500 . 
     The touch operation unit  504  serves to operate the blender according to the present disclosure via contact. It is desirable that the touch operation unit  504  is configured in such a manner as to perform operations, such as starting the blender and stopping the blender. 
     Of course, the knob  502  and the touch operation unit  504  may be configured in such a manner as to selectively perform a function of setting the blender and a function of operating the blender or in such a manner as to perform these two functions individually. That is, for convenience, according to the user&#39;s selection, one of the knob  502  and the touch operation unit  504  may be configured in such a manner as to perform the function of operating the blender or the function of setting the blender. 
     A display unit  506  is further provided adjacent to the touch operation unit  504  (to the left side of the touch operation unit  504  in  FIG. 1 ). That is, the display unit  506  is further provided on the upper surface of the main body  500 . The display unit  506  serves to display an operating state of the blender in such a manner as to be viewed by the user from the outside. Therefore, it is desirable that the display unit  506  is configured as a seven-segment display. 
     A cooling fan  610  that forces air to flow is further provided below the motor assembly  600 . 
     The cooling fan  610  is connected to a lower end portion of the motor assembly  600 , and thus is rotated by the rotational force generated by the motor assembly  600 . Accordingly, outside air is forced to be introduced into the main body  500  and to be discharged back to the outside. In this manner, the cooling fan  610  introduces air into the main body  500  from the outside and then discharges the air to the outside. That is, the cooling fan  610  serves to cool components, such as a PCB, that are provided inside the main body  500 . 
     A base support  510  is further provided on a lower surface of the main body  500 . 
     The base support  510  is formed in such a manner as to protrude downward from a bottom surface of the main body  500 . A space of a predetermined size is formed inside the base support  510 . A wireless electric power module  520  is accommodated in this space. The wireless electric power module  520  is supplied with electric power from the outside in a wireless manner that uses an induced electromotive force and serves to supply the electric power to the motor assembly  600  inside the main body  500 . 
     A detection system is further provided in the main body  500 , the container body  100 , and the like. The detection system detects whether or not the container lid  400  is attached on the upper surface of the container body  100 . 
     An electric circuit (not illustrated) capable of being turned on and off is provided on the container body  100 . The electric circuit forms a closed circuit. Thus, it is desirable that the detection system is configured in such a manner as to detect whether an electric current flows through the closed circuit by a voltage supplied from the main body  500 . 
     More specifically, the detection system is configured to include an electric power transmission unit  700 , an electric power reception unit  220 , a turning-on and -off unit  230 , a transparent electrode film  240 , a detection unit  800 , and the like. The electric power transmission unit  700  is provided in the main body  500  and supplies an electric power to the container body  100 . The electric power reception unit  220  is provided in the container body  100  and receives the electric power supplied from the electric power transmission unit  700 . The turning-on and -off unit  230  is provided on an upper end portion of the container body  100  and turns on and off an electric circuit formed in the container body  100  according to whether or not the container lid  400  is attached on an upper surface of the container body  100 . The transparent electrode film  240  is made of a transparent material and is provided on one surface of the container body  100 . The transparent electrode film  240  is connected to the electric power reception unit  220  and the turning-on and -off unit  230  in a manner that allows electricity to flow therebetween. The detection unit  800  is provided on one side of the main  500  or the container body  100  and detects whether or not an electric current flows through a closed circuit formed by the electric circuit connected to the electric power reception unit  220  and the turning-on and -off unit  230 . 
     The electric power transmission unit  700  serves to transfer the electric power supplied to the main body  500  from the outside of the main body  500  or the electric power pre-stored in the main body  500  itself to the container body  100 . It is desirable that an induction coil or the like where an induced electromotive force can occur is used as the electric power transmission unit  700 . 
     The electric power reception unit  220  serves to receive the electric power transmitted from the main body  500  and has a structure corresponding to that of the electric power transmission unit  700 . That is, it is desirable that the electric power reception unit  220  is configured as a coil in such a manner that by the induced electromotive force, the electric power is transferred between the electric power transmission unit  700  and the electric power reception unit  220 . 
     It is desirable that the electric power transmission unit  700  and the electric power reception unit  220  are positioned adjacent to each other in such a manner as to generate the induced electromotive force. Therefore, according to the present disclosure, an example is illustrated where the electric power transmission unit  700  is mounted on an upper right end portion of the main body  500  and where the electric power reception unit  220  is mounted on a lower right end portion of the container body  100 . 
     The turning-on and -off unit  230  serves to turn on and turn off the electric circuit (not illustrated) formed in the container body  100  according to whether or not the container lid  400  covers the top of the container body  100 . The turning-on and -off unit  230  is configured to include a permanent magnet  232  and a reed switch  234  that are provided in the container lid  400  and the container body  100 , respectively, and the like. 
     As illustrated in  FIG. 2 , according to the present disclosure, a case is illustrated where the permanent magnet  232  is mounted on a right edge of the container lid  400  and where the reed switch  234  is mounted on the upper end portion (a portion of the handle  300 ) of the container body  100 . 
     More specifically, it is desirable that the reed switch  234  is mounted in such a manner as to be accommodated in a switch groove  236  formed in the upper end portion of the handle  300 . 
     The reed switch consists of a pair of ferromagnetic flexible metal contacts in a hermetically sealed glass envelope. The contacts are open when a magnetic field is applied. The configuration of the reed switch is well known in the related art. Therefore, a further detailed description of the configuration and principle of the reed switch is omitted. 
     Of course, instead of the permanent magnet  232  and the reed switch  234 , it is also possible that a different electric turning-on and -off unit or a mechanical structure is used, as the turning-on and -off unit  230 , to turn on and off the electric circuit. It is also possible that the permanent magnet  232  and the reed switch  234  are mounted on the container lid  400  and the container body  100 , respectively. 
     Various types of electric devices, various types of structures, or the like, if they have a function of being able to detect whether or not an electric current flows by the turning-on and -off unit  230  through the electric circuit formed in the container body  100 , may be used as the detection unit  800 . According to the present disclosure, the detection unit  800  is described by taking, as an example, detection of light that uses a photosensor or photodetector. 
     Therefore, the detection unit  800  is configured to include an optical transmission module  810 , an optical reception module  820 , and the like. The optical transmission module  810  is provided in the container body  100  and generates light. The optical reception module  820  is provided in the main body  500  and receives the light transmitted by the optical transmission module  810 . 
     It is desirable that the optical transmission module  810  and the optical reception module  820  are positioned adjacent to each other. According to the present disclosure, as illustrated, the optical transmission module  810  is positioned on a lower left end portion of the container body  100 , and the optical reception module  820  is positioned on an upper left end portion of the main body  500 . 
     It is desirable that an light emitting diode (LED) or the like that generates light using electricity is used as the optical transmission module  810 . It is desirable that a photosensor, a photodetector, or the like that receives light and converts the received light into an electric signal is used as the optical reception module  820 . 
     Then, the transparent electrode film  240  is provided between the outer container body  110  and the inner container body  120 . More specifically, it is desirable that the transparent electrode film  240  is mounted on an internal surface of the outer container body  110 . 
     The transparent electrode film  240  is made of a transparent material, such as indium-tin oxide (ITO), and is attached on a surface of the container body  100 . The turning-on and -off unit  230  provided on the upper end portion of the container body  100  is also connected to the electric power reception unit  220  and the optical transmission module  810 , which are provided on a lower end portion of the container body  100 , thereby constituting the electric circuit. 
     In this manner, the transparent electrode film  240  is attached on the surface of the container body  100  made of a transparent material in a manner that extends longitudinally in the upward-downward direction. Thus, the transparent electrode film  240  serves to guide transfer of an electric signal between upper and lower end portions of the container body  100 . 
     When the container body  100  and the transparent electrode film  240  are both made of a transparent material, the transparent electrode film  240  is not visible to the outside. Thus, the transparent electrode film  240  does not spoil the exterior appearance of the container body  100 , and a design of the container body  100  is visually aesthetic. 
     Then, in a case where the transparent electrode film  240  is attached on the surface of the container body  100 , a hole may be formed in the transparent electrode film  240 . The hole serves to remove a bubble occurring between the transparent electrode film  240  and the surface of the container body  100  on which the transparent electrode film  240  is attached. That is, in order to prevent the bubble from occurring, it is desirable that a hole is made through a center portion of the transparent electrode film  240  made of ITO in such a manner that the bubble escapes therethrough. 
     A seating support  900  is formed on the upper surface of the main body  500  in such a manner as to protrude upward therefrom. 
     The seating support  900  is formed to a circular shape that corresponds to a shape of the lower end portion of the container body  100 . The lower end portion of the container body  100  is seated in the upward-downward direction on the seating support  900  in a manner that is removable therefrom. 
     The container body  100  is formed in a double-layered manner. That is, the container body  100  is configured to include the outer container body  110  and the inner container body  120 . It is desirable that the inner guide  122  is formed in such a manner as to protrude inward from an internal surface of the inner container body  120 . 
     A configuration of the container body  100  will be described in detail below. 
       FIG. 3  is an exploded perspective view illustrating the container body  100 .  FIG. 4  is a perspective view illustrating the container body  100 , when viewed from below. 
     As illustrated in  FIGS. 3 and 4 , the container body  100  is formed in a cylindrical shape when viewed as a whole and is formed in a double-layered manner. That is, the container body  100  is configured to include the outer container body  110  that provides the exterior appearance of the container body  100  and the inner container body  120  that is inside the outer container body  110 . 
     It is desirable that the container body  100 , that is, the outer container body  110  and the inner container body  120  are made of a transparent material. That is, it is desirable that the outer container body  110  and the inner container body  120  are made of a transparent material, such as glass, polycyclohexylenedimethylene terephthalate (PCT), transparent plastic in such a manner that the user may visually check the state of the food inside the container body  100  from the outside. 
     The outer container body  110  provides the exterior appearance of the container body  100 . It is desirable that the external container body  110  is formed in a cylindrical shape that has upper and lower portions of the same size. A main handle  302  is formed in such a manner as to protrude rightward from a right-side external surface of the outer container body  110 . The main handle can be gripped with the user&#39;s hand. 
     The main handle  302  is formed in the shape of a “ ”. An upper end portion of the main handle  302  is connected to an upper right end portion of the outer container body  110 . It is desirable that the main handle  302  is formed by injection molding in such a manner as to be integrally combined with the outer container body  110 . The main handle  302  has a relatively improved strength and durability in terms of an advantage when formed by injection molding in such a manner as to be integrally combined with the outer container body  110  than when jointed or fixed, as a separate single component, to the outer container body  110 . 
     The switch groove  236  in which the reed switch  234  is accommodated is formed in a portion of the main handle  302  that is connected to the container body  100 . That is, the switch groove  236  is formed in the upper end portion of the main handle  302  and provides a space in which the reed switch  234  is mounted. The switch groove  236  is open at the left side. 
     An exterior handle  304  and an internal handle  306  are further provided in such a manner as to extend outward from the main handle  302 . That is, as illustrated, the exterior handle  306  is provided at the right side of the main handle  302 , and the internal handle  306  is provided at the left side thereof. 
     More specifically, like main handle  302 , the exterior handle  304  is also formed to the shape of “ ” when viewed as a whole. The exterior handle  304  is formed in such a manner as to enclose an upper surface, a right-side surface, and front and rear surfaces of the main handle  302 . It is desirable that the exterior handle  304  is made of an unbreakable antirust material having a smooth surface, such as a stainless steel material. This formation of the exterior handle  304  provides a visually aesthetic impression to a consumer. 
     The internal handle  306  encloses a left-side surface and a bottom surface of the main handle  302 . The internal handle  306  is formed to the shape of “ ” that corresponds to a shape of the bottom surface of the main handle  302 . It is desirable that at least one portion of the internal handle  306  is made of an elastic material. 
     Specifically, the internal handle  306  is configured to include a connection portion  306   a , a grip portion  306   b , and the like. The connection portion  306   a  encloses a lower part of the upper end portion of the main handle  302 . The grip portion  306   b  is formed in such a manner as to extend downward from the connection portion  306   a  and encloses the left-side surface of the main handle  302 . 
     It is desirable that, like the external handle  304 , the connection portion  306   a  is made of an unbreakable material having a smooth surface. The grip portion  306   b  is covered by the user&#39;s fingers. Thus, it is desirable that the grip portion  306   b  is made of an elastic material. That is, it is desirable that the connection portion  306   a  is made of a stainless steel material. The grip portion  306   b  is covered by the user&#39;s four fingers (other than the thumb). Thus, it is desirable that grip portion  306   b  is made of an elastic material, such as rubber, that provides a sense of smooth touch to the user. 
     The inner container body  120  is formed in such a manner as to have a smaller size (diameter) than the outer container body  110  and is seated inside the outer container body  110 . 
     The inner container body  120  is formed in a cylindrical shape that is open at the top. More specifically, as illustrated, the nearer a cross section of the inner container body  120  is to the bottom, the more decreased a diameter thereof. That is, the inner container body  120  is formed in such a manner as to be tapered to the bottom. 
     A plurality of inner guides  122  as described above is formed in the upward-downward direction in an external surface of the inner container body  120 . The blade assembly  200  and the like are mounted on a lower end portion of the inner container body  120 . 
     The projection lip  210  is formed on an upper left end portion of the inner container body  120  in a manner that protrudes leftward. A covering container lid  124  is formed on an upper right end portion of the inner container body  120  in a manner that extends rightward. 
     The covering container lid  124  serves to cover the top of the switch groove  236  in the outer container body  110 . The covering container lid  124  is formed in a plate that has a predetermined thickness. In order to correspond to a size of an upper end portion of the switch groove  236 , the covering container lid  124  is formed in such a manner that the more a right end thereof protrudes rightward, the smaller a width thereof. 
     The blade assembly  200  is mounted on the lower end portion of the inner container body  120 . 
     The blade assembly  200  serves to chop food into small pieces or mix food using the blades. The blade assembly  200  is configured to include a blade shaft  202 , a blade body  204 , one or more blades  206 , and the like. The blade shaft  202  receives the rotational force from the motor assembly  600  and is rotated thereby. The blade body  204  is provided underneath the blade shaft  202  and supports the blade shaft  202 . The one or more blades  206  are connected to the blade shaft  202 , and thus are rotated, thereby chopping the food into small pieces. 
     A magnet holder  404  is further provided on the outer circumferential surface of the container lid  400 . That is, as illustrated, the magnet holder  404  is formed in the outer circumferential surface of the container lid  400  in a manner that protrudes outward. The permanent magnet  232  is inserted into the magnet holder  404 . 
     When the container lid  400  is attached on the upper surface of the container body  100  or detached therefrom, the permanent magnet  232  serves to perform control to turn on and off the reed switch  234 . 
     A coil holder assembly is further provided between the outer container body  110  and the inner container body  120 . 
     The coil holder assembly is configured to include a coil holder  130 , an upper cover  140 , a lower cover  150 , and the like. An induction coil is provided on the coil holder  130 . The upper cover  140  and the lower cover  150  enclose upper and lower portions, respectively, of the coil holder  130 . 
     Specifically, the coil holder  130  is provided between a bottom surface of the outer container body  110  and a bottom surface of the inner container body  120 . The electric power reception unit  220  and the optical transmission module  810  are mounted on the coil holder  130 . 
     The coil holder  130  has the shape of a circular ring of a predetermined width when viewed as a whole. The electric power reception unit  220  is provided on a right end portion of the coil holder  130  in the shape of the circular ring. That is, although not illustrated, the induction coil receiving electric power is provided on the right end portion of the coil holder  130  and constitutes the electric power reception unit  220 . 
     The electric power reception unit  220  provided on the coil holder  130  is realized as a reception induction coil patterned in the same plane on a PCB. That is, in an implementation of the electric power reception unit  220 , the reception induction coil is wound a number of times in helical form on a reception core on the PCB on the bottom surface of the coil holder  130 . 
     The optical transmission module  810  is provided on the bottom surface of the coil holder  130 . 
     The optical transmission module  810  emits light by electricity supplied from the electric power reception unit  220  and constitutes the detection unit  800 . As described above, it is desirable that an LED or the like is used as the optical transmission module  810 . 
     The electric power reception unit  220  and the optical transmission module  810  are electrically connected to each other. That is, the electric power reception unit  220  and the optical transmission module  810  are formed in such a manner as to form a closed circuit along with the turning-on and -off unit  230  and the like. Therefore, it is desirable that the electric power reception unit  220 , the optical transmission module  810 , the turning-on and -off unit  230 , and the like are configured in such a manner as to be electrically connected to each other by a printed circuit board (PCB) or the like on the coil holder  130 . 
     Although not illustrated, a conversion module that converts alternating current (AC) into direct current (DC) may be further provided on the coil holder  130 . 
     A holder terminal  132  is provided on an upper surface of a right end portion of the coil holder  130 . 
     A lower end portion of the transparent electrode film  240  is inserted into the holder terminal  132  for being connected thereto. 
     As illustrated, the coil holder  130  is formed in the shape of a ring when viewed as a whole. As illustrated, it is desirable that the coil holder  130  is formed in such a manner that the right end portion thereof has a relatively wide width so that the electric power reception unit  220  and the like are formed on the right end portion thereof. 
     A hole may be formed in outer and inner circumferential surfaces of the coil holder  130 . A hook for fixing a plurality of components passes through the hole. 
     The coil holder  130  is protected by the upper and lower covers  140  and  150 . The upper cover  140  and the lower cover  150  that correspond upper and lower surfaces, respectively, of the coil holder  130  are provided over and under the coil holder  130 , respectively, and enclose upper and lower portions, respectively, of the coil holder  130 . 
     A terminal holder  142  is formed on a right end portion of the upper cover  140  in a manner that protrudes upward. The holder terminal  132  of the coil holder  130  is accommodated in the terminal holder  142 . Therefore, the holder terminal  132  is inserted, from below, into the terminal holder  142  for being accommodated therein. An upper portion of the terminal holder  142  is formed in such a manner as to have an opening at the part thereof. The lower end portion of the transparent electrode film  240  passes through the opening. 
     A hook may be formed on the upper cover  140 . With the hook, the upper cover  140  is combined with the lower cover  150 . 
     As described above, the transparent electrode film  240  is made of a transparent material, such as indium-tin oxide (ITO). The transparent electrode film  240  is configured in such a manner as to have a size corresponding to a length of the container body  100  in the upward-downward direction. 
     The transparent electrode film  240  is provided between the outer container body  110  and the inner container body  120 . The presence of the transparent electrode film  240  between the outer container body  110  and the inner container body  120  prevents a contact with the food inside the inner container body  120  and blocks an outside foreign material from coming into contact with the outer container body  110  as well. 
     The transparent electrode film  240  may be attached on a surface of the outer container body  110  or may be attached on a surface of the inner container body  120 . That is, the transparent electrode film  240  may be attached on the internal surface of the outer container body  110  or may be attached on an external surface (outer circumferential surface) of the inner container body  120 . 
     A case where the transparent electrode film  240  is attached on the internal surface of the outer container body  110  in a manner that extends longitudinally in the upward-downward direction is described hereinafter as an example. 
     The transparent electrode film  240 , as illustrated, is bent one or more times. A lower end portion thereof passes through the terminal holder  142  of the upper cover  140  and is connected to the holder terminal  132  of the coil holder  130 , and an upper end portion thereof is connected to the reed switch  234 . 
     That is, a film guide on which the transparent electrode film  240  is attached is formed on the internal surface of the outer container body  110  in a manner that extends longitudinally in the upward-downward direction. That is, the film guide is formed on a right-side surface of the outer container body  110  in a manner that extends longitudinally in the upward-downward direction, and thus guides attaching of the transparent electrode film  240 . 
     A magnet groove  126  is formed in an upper end portion of the inner container body  120  in a manner that is cut outward. The permanent magnet  232  is accommodated in the magnet groove  126 . That is, an end portion on the right side of the inner container body  120  is partly cut off rightward in a manner that has different heights, and thus the magnet groove  126  is formed. The permanent magnet  232  and the like are positioned in the magnet groove  126 . 
     The container body  100  is formed in such a manner that a bottom surface thereof has a shape corresponding to a shape of the upper surface of the main body  500 . With this configuration, the container body  100  is easily attached on and detached from the upper surface of the main body  500 . 
     More specifically, the container body  100  is seated on the seating support  900  of the main body  500  described below. 
     The container body  100  is formed in such a manner that the bottom surface thereof has a shape corresponding to a shape of an upper end portion of the main body  500 . Thus, the container body  100  is seated on the main body  500  and is easily removed therefrom. 
     An edge rim  170  of a predetermined width is formed on the bottom surface of the container body  100  in a manner that protrudes downward. The edge rim  170  is brought into contact with an upper surface of a lower rim  910  of the seating support  900  on the main body  500 . The edge rim  170  is formed in a shape corresponding to a shape of an upper surface of the lower rim  910 . The lower rim  910  will be described below. 
     One part of a center portion of the bottom surface of the container body  100  is recessed in the upward direction, and thus an upper-rim accommodation groove  172  is formed. That is, the one part of the center portion of the bottom surface of the container body  100  is recessed in the upward direction inward from the edge rim  170  of the container body  100 , and thus the upper-rim accommodation groove  172  is formed. When the container body  100  is seated on the main body  500 , an upper rim  920  of the seating support  900  on the main body  500  is accommodated in the upper-rim accommodation groove  172 . The upper rim  920  will be described below. 
     The edge rim  170  is formed to a shape of a circular ring that has an opening at one portion thereof. A coil seating part  940  described below is accommodated in this opening. That is, the edge rim  170  is open at the right end, and thus a coil seating groove  170   a  is formed. The coil seating part  940  described below is accommodated in the coil seating groove  170   a.    
     One part of the center portion of the bottom surface of the container body  100  protrudes downward, and thus a circular rim  174  is formed. That is, the center portion of the upper-rim accommodation groove  172  includes the circular rim  174  protruding downward. 
     As illustrated, the circular rim  174  has the shape of a circular ring. The circular rim  174  is open at the center. The circular rim  174  provides a path along which the blade assembly  200  and the motor assembly  600  may be connected to each other. 
     The circular rim  174  is accommodated in a circular-rim accommodation groove  980  formed in the main body  500 . The circular-rim accommodation groove  980  will be described below. 
     A plurality of mounting protrusions  174   a  that protrude radially is further provided on an outer circumferential surface of the circular rim  174 . The mounting protrusion  174   a  serves to hold the container body  100  firmly at its home position on the main body  500  and to keep the container body  100  stationary without being rotated. One or more mounting protrusions  174   a  are provided. 
     According to the present disclosure, an example is illustrated where four mounting protrusions  174   a  are provided. It is desirable that the mounting protrusion  174   a  is formed in such a manner that the farther an end thereof extends outward from the outer circumferential surface of the circular rim  174 , the more decreased a diameter thereof. The reason for this is to easily accommodate the mounting protrusion  174   a  in the protrusion groove  982  described below. 
       FIGS. 5 to 7  are views each illustrating in detail components in the upper half of the main body  500 .  FIG. 5  is a perspective view illustrating the main body  500 .  FIG. 6  is an exploded perspective view illustrating the components in the upper half of the main body  500 .  FIG. 7  is a perspective view illustrating a state where a cover is removed from the main body  500 . 
     As illustrated in  FIGS. 5 to 7 , the seating support  900  is provided on the upper surface of the main body  500  in a manner that protrudes upward while having different heights. The bottom of the container body  100  is seated on the seating support  900 . 
     The lower end portion of the container body  100  is seated on the seating support  900  and is supported thereon. Therefore, it is desirable that the seating support  900  is formed in such a manner as to have a shape corresponding to a shape of the lower end portion of the container body  100 . 
     Specifically, the seating support  900  is configured to include the lower rim  910 , the upper rim  920 , and the like. The lower rim  910  is formed in such a manner as to have a different height and has a diameter corresponding to a diameter of the lower end portion of the container body  100 . The upper rim  920  is formed in such a manner as to protrude upward from the lower rim  910  and has a smaller diameter than the lower rim  910 . 
     As illustrated, the lower rim  910  is formed in such a manner as to have a circular shape and a predetermined height. The upper rim  920  having a smaller diameter than the lower rim  910  is formed on the upper surface of the lower rim  910  in such a manner as to protrude upward therefrom to a predetermined height. Therefore, it is desirable that a step surface  902 , like the upper surface of the main body  500 , is in the horizontal plane and is formed between the lower rim  910  having a relatively great diameter and the upper rim  920  having a relatively small diameter. 
     An exterior ring  912  and an upper end ring  914  are provided on external surfaces, respectively, of the lower rim  910  and the upper rim  920 . The exterior ring  912  and an upper end ring  914  have shapes corresponding to shapes, respectively, of the external surfaces of the lower rim  910  and the upper rim  920 . The exterior ring  912  and the upper end ring  914  are provided on outer circumferential surfaces, respectively, of the lower rim  910  and the upper rim  920  that have a circular external surface, and thus enclose external surfaces (flank surfaces), respectively, of the lower rim  910  and the upper rim  920 . 
     The exterior ring  912  and the upper end ring  914  serve to protect components inside and serve as an exterior material. Therefore, it is desirable that like the exterior handle  304 , the exterior ring  912  and the upper end ring  914  are made of an antirust material having a smooth surface, such as a stainless steel material. 
     An elastic member  930  made of an elastic material is further provided on the step surface  902  between the upper rim  920  and the lower rim  910 . It is desirable that as illustrated, the elastic member  930  is formed in such a manner as to enclose the step surface  902  formed on the upper surface of the lower rim  910  and to enclose a lower portion of the upper rim  920 . 
     The elastic member  930  is made of an elastic material, and thus serves as a cushion that absorbs shock when the container body  100  is placed on the main body  500 . That is, when the bottom surface of the container body  100  is brought into contact with the upper rim  920 , the elastic member  930  also serves to prevent the upper rim  920  and the lower rim  910  on the main body  500 , which are formed of a solid material, and the bottom surface of the container body  100  from being damaged or from generating noise due to collision with each other. 
     In this manner, the elastic member  930 , made of a material such as rubber, is used to smoothly seat the container body  100  on the main body  500  without any shock. In addition, conductivity rubber may be used whenever necessary. In this case, conductivity rubber may also be provided on the bottom of the container body  100 . 
     The electric power transmission unit  700  and the optical reception module  820  are mounted on an upper surface of the upper rim  920 . 
     More specifically, a right-side surface of the upper rim  920  further protrudes rightward, and the coil seating part  940  is formed on the right-side surface thereof. The electric power transmission unit  700  is mounted on an upper surface of the coil seating part  940 . 
     The electric power transmission unit  700  is positioned adjacent to the electric power reception unit  220  provided on the container body  100  and serves to supply electric power to the electric power reception unit  220 . Therefore, it is desirable that the electric power transmission unit  700  is configured as an induction coil. That is, like the electric power reception unit  220 , the electric power transmission unit  700  may be configured as an induction coil wound a number of times in helical form on a core (not illustrated) on the same surface and may be mounted on a PCB. 
     In addition, although not illustrated in detail, an oscillation circuit unit may be provided inside the main body  500 . The oscillation circuit unit may generate electric power and may apply electric current to the electric power transmission unit  700 . A magnetic field may be produced by the electric current applied to the electric power transmission unit  700 . Then, the oscillation circuit unit may change strength of the electric current that is applied to the electric power transmission unit  700 , and the change in the strength of the electric current changes the magnetic field in the electric power transmission unit  700 . 
     Therefore, according to the present disclosure, when the electric power reception unit  220  and the electric power transmission unit  700  are mounted in such a manner as to correspond to each other in the upward-downward direction, the strength of the electric current that is applied to the electric power transmission unit  700  is changed, and the magnetic field in the electric power transmission unit  700  is accordingly changed. Thus, inductive coupling between the electric power transmission unit  700  and the electric power reception unit  220  changes with the magnetic flux passing through the electric power reception unit  220 . Consequently, an induced electromotive force develops in the electric power reception unit  220 . This induced electromotive force may also be supplied to the optical transmission module  810 . 
     The optical reception module  820  is provided in a direction opposite to a direction of the electric power transmission unit  700 . That is, it is desirable that the optical reception module  820  is provided in a reception groove  822  formed in an upper surface of a left end portion of the upper rim  920 . The reception groove  822  is positioned in a manner that corresponds in the upward-downward direction to the optical transmission module  810  mounted on the container body  100 . 
     More specifically, the reception groove  822  of a predetermined size is formed in the upper surface of the left end portion of the upper rim  920  in a manner that is cut downward. The optical reception module  820  is fixedly mounted in the reception groove  822 . 
     It is desirable that the optical reception module  820 , as described above, includes a photosensor or photodetector. The optical reception module  820  may receive light transmitted by the optical transmission module  810  and may transmit this received optical signal. 
     A Hall sensor  950  and a container body detection switch  960  may be further provided on the upper surface of the upper rim  920 . That is, a container body switch groove  962  and a sensor groove  952  are formed in upper surfaces, respectively, of leading and rear end portions of the upper rim  920  in a manner that is cut downward. The container body detection switch  960  and the Hall sensor  950  are fixedly mounted in the container body switch groove  962  and the sensor groove  952 , respectively. 
     The container body detection switch  960  is configured as a reed switch and serves to detect whether or not the container body  100  is seated on the upper surface of the main body  500 . In a case where the container body detection switch  960  is mounted, a magnet (not illustrated) corresponding to the container body detection switch  960  is also further provided on the lower end portion of the container body  100 . 
     The Hall sensor  950  serves to determine a type of the container body  100  seated on the main body  500 . In this case, a signal transfer unit that corresponds to the bottom surface of the container body  100  may also be necessary. 
     The upper end ring  914  is mounted on an edge of the upper rim  920 . It is desirable that the upper end ring  914  is configured in such a manner as to be separated into two pieces. That is, as illustrated, the right-side surface of the upper rim  920  protrudes rightward, and thus the coil seating part  940  is formed. Therefore, the upper end ring  914  is configured to include a protrusion piece  916  and a curvature piece  918 . The protrusion piece  916  encloses an external surface of the coil seating part  940 . The curvature piece  918  encloses portions other than the external surface thereof. 
     An upper portion of the upper rim  920  is covered by a cover  970 . Therefore, the electric power transmission unit  700 , the optical reception module  820 , the container body detection switch  960 , the Hall sensor  950 , and the like that are mounted on the upper rim  920  are covered by the cover  970  to be protected. 
     A center portion of the seating support  900  is open at the top and bottom. Thus, the blade assembly  200  of the container body  100  and the motor assembly  600  built into the main body  500  are connected to each other. 
     More specifically, the circular-rim accommodation groove  980  is formed in a center portion of the upper rim  920  in a manner that is cut downward. The above-described circular rim  174  on a lower end of the container body  100  is accommodated in the circular-rim accommodation groove  980 . That is, the upper rim  920  has the shape of a circular ring when viewed as a whole. The circular-rim accommodation groove  980  in the shape of a circle is formed in the center portion of the upper rim  920 . 
     One or more protrusion grooves  982  are formed in an internal surface of the upper rim  920 . One or more portions of the protrusion groove  982  are recessed outward, and thus one or more circular-rim accommodation grooves  980  are radially formed. The mounting protrusion  174   a  of the container body  100  is seated in the circular-rim accommodation groove  982 . 
     Therefore, it is desirable that the number of the protrusion grooves  982  is the same as the number of the mounting protrusions  174   a  and that the protrusion groove  982  is formed in such a manner that a size thereof corresponds to a size of the mounting protrusion  174   a . It is desirable that the protrusion groove  982  is formed in such a manner as to have the same width as or a greater width than the mounting protrusions  174   a.    
       FIG. 8  is a longitudinal cross-sectional view illustrating an internal configuration of the main body  500 . 
     With reference to  FIG. 8 , the main body  500  may be formed in the shape of a hexahedron when viewed as a whole. A main-body casing  530  provides an exterior appearance. 
     As illustrated, the main-body casing  530  is formed in a shape of a hexahedron that is open at the bottom. The bottom of the main-body casing  530  is covered by a base plate  540  described below and the base support  510  described above. 
     The seating support  900  constitutes one part of an exterior appearance of an upper portion of the main-body casing  530 . The seating support  900  is formed on a center portion of an upper surface of the main-body casing  530 . Therefore, the seating support  900  constitutes one portion of the upper surface of the main body  500 . 
     Then, it is desirable that the main-body casing  530  is formed in a double-layered manner. The main-body casing  530  may be configured to include an inner casing  532  and the outer casing  534 . It is desirable that the outer casing  534  is made of a metal material or a metal-texture material. 
     The inner casing  532  is provided inside the outer casing  534  and substantially supports a plurality of internal components. Therefore, a space in which the motor assembly  600 , the PCB module, and the like that are described above are to be mounted is formed inside the inner casing  532 . 
     The motor assembly  600  is mounted in the center portion of the main body  500 . The motor assembly  600  is configured to include a motor  620 , a housing  630 , and the like. The motor  620  is provided in such a manner that a motor shaft  622  passes through a center portion thereof from top to bottom. The housing  630  provides an exterior appearance of the motor  620 . 
     The motor housing  630  is configured to include an upper housing  632 , a lower housing  634 , and the like. The upper housing  632  encloses an upper portion of the motor  620 , and the lower housing  634  encloses a lower portion of the motor  620 . The upper housing  632  and the lower housing  634  are firmly fastened to each other using a plurality of fastening bolts  636  or the like. 
     The motor shaft  622  is formed inside the main body  500  in a manner that extends longitudinally in the upward-downward direction. The cooling fan  610  described above is combined with a lower end portion of the motor shaft  622 . A motive-power transfer disc  640  that is connected to the blade assembly  200  is connected to an upper end portion of the motor shaft  622 . The motive-power transfer disc  640  is formed in such a manner as to protrude upward from the main body  500  and outward from its center and transfers a rotational force generated by the motor  620  to the blade assembly  200 . 
     A plurality of PCB modules  542  is provided inside the main body  500 . 
     Specifically, the open bottom of the inner case  532  constituting the main-body casing  530  is covered by the base plate  540 . The plurality of PCB modules  542  is mounted above the base plate  540 . 
     The base plate  540  is formed in a shape of a plate that corresponds to the open bottom of the inner casing  532 . It is desirable that an edge of the base plate  540  is combined with a lower end portion of the inner casing  532 . 
     The base plate  540  is provided on a lower end portion of the main body  500  and serves to support a plurality of components, such as the motor assembly  600  and the PCB module  542 . 
     The base support  510  described above is provided underneath the base plate  540 . 
     The PCB modules  542  may be arranged inside the inner casing  532  in such a manner as to be spaced apart from each other. The PCB modules  542  may be mounted separately according to their functions. That is, the PCB modules  542  may be arranged outside the motor assembly  600  in such a manner as to be spaced apart from each other to surround the motor assembly  600 . The PCB modules  542  may include a main PCB module for controlling overall operations of the blender, an inverter PCB module for controlling the motor  620 , a power PCB module for controlling input electric power, a PCB module for removing noise, and the like. 
     The PCB modules  542  may further include an additional PCB module associated with a function of the blender according to the present disclosure. One or several modules may be removed. 
     A heat dissipation member  544  for dissipating heat may be provided to the PCB module  542 . It is desirable that the heat dissipation member  544 , as illustrated, is mounted in such a manner as to be adjacent to at least one PCB module  542  among the PCB modules  542 . The heat dissipation member  544  is configured in such a manner that a plurality of heat dissipation fins are brought into contact with air and dissipate heat. 
     An air guide  550  is provided on an upper surface of the base plate  540 . 
     The air guide  550  guides discharging of air forced by the cooling fan  610  to flow. The motor assembly  600  is seated on an upper surface of the air guide  550 . The cooling fan  610  is positioned inside the air guide  550 . 
     The cooling fan  610  may have various types of blades. However, it is desirable that the cooling fan  610  is configured in such a manner as to absorb at least air inside the motor assembly  600  described above and then to discharge the air sideways or downward. 
     Therefore, when the cooling fan  610  is rotated along with the motor shaft  622 , air outside the main body  500  is introduced into the main body  500 , flows through the motor housing  630 , and then flows downward. Thereafter, the air is forced by the cooling fan  610  to flow through the air guide  550  to be discharged. 
     An airtight member  560  is further provided between the air guide  550  and the motor assembly  600 . That is, the motor assembly  600  is seated on the upper surface of the air guide  550 . The airtight member  560  is provided on an edge of a seating surface of the lower end portion of the motor assembly  600 . 
     It is desirable that the airtight member  560  is made of an elastic material, such as rubber. The airtight member  560  serves to protect the motor assembly  600  seated on the air guide  550  from shock. At the same time, the airtight member  560  bridges a gap between the motor assembly  600  and the air guide  550 , thereby blocking air or liquid from flowing therethrough. 
     A discharge unit  570  is provided on the main body  500 . The discharge unit  570  guides discharging of liquid or a foreign material remaining on the upper surface of the main body  500  to the outside. 
     The discharge unit  570  is configured to include a discharge hole  572 , a discharge hose  574 , and the like. The discharge hole  572  serves to guide liquid or food dropping remaining on the upper surface of the main body  500  toward the downward direction. The discharge hose  574  is provided underneath the discharge hole  572  and serves to guide flowing of the liquid or the food dropping through the discharge hole  572  to below the main body  500 . 
     The discharge hole  572 , as illustrated, is formed in such a manner as to pass through the upper surface of the main body  500  from top to bottom. It is desirable that the discharge hole  572  is a circular hole having a predetermined diameter. 
     More specifically, the discharge hole  572  is formed in the circular-rim accommodation groove  980  that is formed in the center portion of the upper rim  920  in a manner that is cut downward. 
     A groove connection portion  572   a  is formed on a lower end portion of the discharge hole  572  in such a manner as to extend downward therefrom and serves to guide flowing of the liquid or the foreign material introduced through the discharge hole  572  into the main body  500 . 
     Specifically, the lower end portion of the discharge hole  572  that is formed in the bottom surface of the circular-rim accommodation groove  980  in a manner that passes through the circular-rim accommodation groove  980  from top to bottom extends farther downward to form the groove connection portion  572   a . Therefore, the groove connection portion  572   a  has the shape of a cylinder having an internal diameter corresponding to an internal diameter of the discharge hole  572 . 
     An upper end portion of the discharge hose  574  is inserted into the groove connection portion  572   a  for being connected. More specifically, a pressing-fitting end portion  574   a  of the discharge hose  574  is inserted into the groove connection portion  572   a . The pressing-fitting end portion  574   a  will be described below. 
     As illustrated, the discharge hose  574  connects an internal upper end portion of the main body  500  and internal lower end portion thereof to each other and serves as a path that guides the liquid and the foreign material remaining on the main body  500  to below the main body  500 . 
     The discharge hose  574  is formed in such a manner as to have a predetermined length. The discharge hose  574  is open at the top and bottom. The discharge hose  574  has an internal hole having a predetermined diameter. The discharge hose  574  may be formed in such a manner as to be flexibly bent in order for the liquid or the foreign material to smoothly flow and in order to prevent interference with other components provided inside the main body  500 . 
     It is desirable that the discharge hose  574  is made of an elastic material. It is also possible that the discharge hose  574  is made of a metal material, a plastic material, or the like. 
     The pressing-fitting end portion  574   a  enclosing the groove connection portion  572   a  is provided on an upper end portion of the discharge hose  574 . With the discharge hose  574 , the discharge hose  574  is combined with the groove connection portion  572   a.    
     As illustrated, the pressing-fitting end portion  574   a  is formed in the shape of a cylinder that is open at the top. It is desirable that the pressing-fitting end portion  574   a  is formed in such a manner as to have an internal diameter corresponding to an external diameter of the groove connection portion  572   a  and to enclose the groove connection portion  572   a  from outside. 
     The reason why the pressing-fitting end portion  574   a  is combined with the groove connection portion  572   a  in such a manner as to enclose the groove connection portion  572   a  from outside is to discharge liquid or the like, introduced through a gap between the pressing-fitting end portion  574   a  and the groove connection portion  572   a , downward through the discharge hose  574 . 
     In a case where the pressing-fitting end portion  574   a  is made of an elastic material, such as rubber, it is also possible that the pressing-fitting end portion  574   a  is formed in such a manner that the internal diameter thereof is smaller than the external diameter of the groove connection portion  572   a.    
     A hose holder  576  is further provided in the main body  500 . The hose holder  576  serves to fix a lower end portion of the discharge hose  574  to a lower end portion of the main body  500 . 
     The hose holder  576  serves to fixedly support a lower end portion of the discharge hose  574 . The hose holder  576  is configured to include a holder body  576   a , a hose insertion portion  576   b , a holder wing  576   c , a holder discharge portion  576   d , and the like. The holder body  576   a  in the shape of a cylinder is mounted on the lower end portion of the main body  500 . The hose insertion portion  576   b  is formed in such a manner as to extend upward from the holder body  576   a  and is inserted into the discharge hose  574 . The holder wing  576   c  protrudes outward from an outer circumferential surface of the holder body  576   a  and guides seating of the hose holder  576  inside the main body  500 . The holder discharge portion  576   d  is formed in such a manner as to extend downward from a lower end portion of the holder body  576   a.    
     As illustrated, the holder body  576   a  is formed in a shape of a cylinder that has a predetermined width and is open at the top and bottom. It is desirable that the holder body  576   a  is formed in such a manner that an external diameter thereof is greater than an external diameter of the discharge hose  574  and is at least the same as the external diameter of the discharge hose  574 . 
     The hose insertion portion  576   b  is formed in such a manner as to extend a predetermined distance upward from an upper end portion of the holder body  576   a . The hose insertion portion  576   b  is formed in such a manner as to have an internal diameter corresponding to an internal diameter of the holder body  576   a . An external diameter of the hose insertion portion  576   b  is such that the hose insertion portion  576   b  can be accommodated in the discharge hose  574 . 
     Of course, in a case where the discharge hose  574  is made of an elastic material, the hose insertion portion  576   b  may be formed in such a manner as to have an external diameter that is greater than an internal diameter of a lower end portion of the discharge hose  574 . 
     As illustrated, the holder wing  576   c  protrudes a predetermined distance outward from an external surface of a center portion of the holder body  576   a , and then is bent vertically upward. That is, the holder wing  576   c  is formed in such a manner as to have a longitudinal cross section in the shape of “ ” (see  FIG. 8 ) and is combined with a rib or the like inside the main body  500 . 
     The holder discharge portion  576   d  is formed in such a manner as to extend a predetermined distance downward from the lower end portion of the holder body  576   a . It is desirable that the holder discharge portion  576   d  is mounted in such a manner as to pass through the base plate  540  from top to bottom. 
     As illustrated, the hose holder  576  is mounted on the base plate  540 . The hose holder  576  fixedly supports a lower end portion of the discharge hose  574  and, at the same time, guides discharging of liquid or the like flowing through the discharge hose  574  to below the base plate  540 . 
     The drain guide  650  configured to support a first end portion of the discharge hose  574  is further provided in the main body  500 . 
     Specifically, the drain guide  650  is provided on an upper surface of the motor assembly  600 . The drain guide  650  serves to prevent liquid passing through the upper surface of the main body  500  and introduced into the main body  500  from permeating into the motor assembly  600 . 
     For example, in a case where the liquid permeating into the main body  500  is not introduced into the discharge hose  574 , the drain guide  650  also guides flowing of the liquid in such a manner that the liquid does not permeate into the motor assembly  600 . Then, in a case where the upper end portion of the discharge hose  574  positioned over the drain guide  650  is damaged or torn, the drain guide  650  serves to guide the liquid leaking from the damaged or torn upper end portion of the discharge hose  574 , to prevent the leaking liquid from permeating into the motor assembly  600 , and to force the leaking liquid to flow to the outside of the motor assembly  600 . 
     A guidance surface  632   a  is defined on the motor assembly  600 . The guidance surface  632   a  serves to seat the drain guide  650 . 
     Here, the guidance surface  632   a  is defined on an upper surface of the motor housing  630  constituting the motor assembly  600 . The guidance surface  632   a  is formed in such a manner as to be gradually inclined downward from the upper surface of the motor housing  630 . 
     Specifically, as described above, the motor housing  630  is configured to include the upper housing  632  and the lower housing  634 . The guidance surface  632   a  is formed in an inclined manner on one edge of the upper surface of the upper housing  632  in such a manner that a height of the guidance surface  632   a  is gradually decreased. 
     The drain guide  650  is fixedly mounted on both the upper surface of the upper housing  632  and the guidance surface  632   a.    
       FIGS. 9 to 16  are views each specifically illustrating in detail a plurality of components provided in the main body  500 .  FIG. 9  is a partial longitudinal cross-sectional view illustrating the main body  500 .  FIG. 10  is a perspective view illustrating a state where the motor assembly  600  is mounted.  FIG. 11  is an exploded perspective view illustrating detailed configurations of the air guide  550 , the base plate  540 , and the like when viewed from above.  FIG. 12  is an exploded perspective view illustrating the detailed configurations of the air guide  550 , the base plate  540 , and the like when viewed from below.  FIG. 13  is an exploded perspective view illustrating the motor assembly  600 .  FIGS. 14 to 16  are perspective views illustrating detailed configurations, respectively, of the air guide  550 , the airtight member  560 , and the base plate  540 . 
     As illustrated, the motor assembly  600  is mounted in a center portion of the main body  500 . The motor assembly  600  is configured to include the motor shaft  622 , the motor  620 , the motor housing  630 , and the like. 
     As described above, the motor housing  630  is configured to include the upper housing  632 , the lower housing  634 , and the like. The upper housing  632  encloses the upper portion of the motor  620 , and the lower housing  634  encloses the lower portion of the motor  620 . The upper housing  632  and the lower housing  634  are firmly fastened to each other using the plurality of fastening bolts  636  or the like. 
     The motor shaft  622  is mounted in the upward-downward direction in such a manner as to pass through a center portion of the motor  620  from top to bottom. The cooling fan  610  is combined with the lower end portion of the motor shaft  622 . The cooling fan  610  is positioned inside the air guide  550  and forces air to flow. That is, with rotation of the cooling fan  610 , air outside the main body  500  is introduced into the main body  500 , flows along the air guide  550 , and is discharged to below the main body  500 . 
     As illustrated, a plurality of housing holes  638  are formed in an upper surface of the upper housing  632  in a manner that pass therethrough from top to bottom. Therefore, through the plurality of housing holes  638 , air above the motor assembly  600  is introduced into the motor assembly  600 . 
     It is desirable the motor housing  630  is configured in such a manner as to be closed at the lateral sides. That is, it is desirable that the upper housing  632  and the lower housing  634  are both closed at the lateral sides and that all air introduced into the motor assembly  600  through the housing hole  638  flows downward and is discharged into the air guide  550 . 
     However, according to the present disclosure, a case is illustrated where an operation hole  634   a  through which an electric power wire for connecting terminals or for supplying electric power to the motor  620  passes is formed in the lower housing  634 . 
     In this manner, the upper housing  632  and the lower housing  634  provide an exterior appearance of the motor assembly  600 . The upper housing  632  is configured to be closed at the lateral sides. It is desirable that all portions of the lower housing  634  other than an essential hole, such as the operation hole  634   a , are also sealed. 
     The motor housing  630  is closed at the lateral sides. The reason of this is to force all air introduced into the motor assembly  600  through the housing hole  638  in the upper housing  632  to flow to below the motor assembly  600 , and then to be introduced into the air guide  550  without being discharged sideways. 
     The air guide  550  is provided in the main body  500 . The air guide  550  guides discharging of the air flowing through the motor assembly  600  to below the main body  500 . That is, as described above, the air guide  550  is brought into contact with the lower end portion of the motor assembly  600  and serves to guide the flowing of the air passing through the motor assembly  600  in the upward-downward direction to below the main body  500 . 
     Specifically, the air guide  550  is mounted on the base plate  540  provided on the lower end portion of the main body  500 . 
     Therefore, a guide seating part  580  on which the air guide  550  is seated is formed on the base plate  540 . A guide protrusion  582  configured to guide mounting of the air guide  550  is formed on an edge of the guide seating part  580 . 
     The guide seating part  580  has a shape corresponding to a lower portion of the air guide  550 , when viewed as a whole. The guide protrusion  582  is formed in such a manner as to have a predetermined height in the upward and downward direction and encloses an external surface of a lower end portion of the air guide  550 . 
     A hook groove  584  with which the fastening hook  554  is combined is further formed in the base plate  540 . The fastening hook  554  will be described below. That is, the hook groove  584  is formed in a lower end portion of the guide protrusion  582  that constitutes the edge of the guide seating part  580 . 
     It is desirable that the hook groove  584  is formed in a shape that corresponds to a shape of the fastening hook  554  described below. It is desirable that the hook groove  584  is formed in a manner that is cut outward from an internal surface of the lower end portion of the guide protrusion  582 . 
     An air-exhaust guidance groove  586  is formed on a first end portion of the base plate  540  in a manner that passes through the one end portion thereof from top to bottom. The air-exhaust guidance groove  586  guides discharging of air forced by the cooling fan  610  to flow. That is, as illustrated, a plurality of the air-exhaust guidance groove  586  is formed in a left end portion of the base plate  540  in a manner that passes through the left end portion thereof from top to bottom. 
     An air-intake guidance hole  588  is formed on a second end portion of the base plate  540  in a manner that passes through the other end portion thereof from top to bottom. The air-intake guidance hole  588  guides flowing of outside air introduced into the main body  500 . That is, as illustrated, the air-intake guidance hole  588  is formed in a right end portion of the base plate  540  in a manner that passes through the right end portion thereof from top to bottom. The air-intake guidance hole  588  guides flowing of air. 
     As described above, the base support  510  is provided underneath the base plate  540 . The base support  510  has a space in which the wireless electric power module  520  is accommodated. Holes corresponding to the air-exhaust guidance groove  586  and the air-intake guidance hole  588 , respectively, are also formed in the base support  510 . 
     Specifically, an air-exhaust hole  512  is formed on a first end portion of the base support  510  in a manner that passes through the one end portion thereof from top to bottom. The air-exhaust hole  512  serves to guide discharging of air introduced through the air-exhaust guidance groove  586  toward the outside of the main body  500 . That is, as illustrated, a plurality of air-exhaust holes  512  is formed in a left end portion of a bottom surface of the base support  510  in a manner that passes through the left end portion thereof from top to bottom. 
     An air-intake hole  514  is formed on a second end portion of the base support  510  in a manner that passes through the other end portion thereof from top to bottom. The air-intake hole  514  serves as a path along which air outside the main boy  500  is introduced into the main body  500 . That is, a plurality of air-intake holes  514  is formed in a right end portion of the bottom surface of the base support  510  in a manner that passes through the right end portion thereof from top to bottom. 
     The air-intake guidance hole  588  in the base plate  540  and the air-intake hole  514  in the base support  510  are arranged at positions, respectively, that correspond to each other in the upward-downward direction. That is, it is desirable that the air-intake guidance hole  588  is positioned over the air-intake hole  514 . The reason for this is to force air introduced into the main body  500  from the outside of the lower portion of the main body  500  through the air-intake hole  514  to directly flow through the air-intake guidance hole  588 . 
     The air-exhaust guidance groove  586  in the base plate  540  and the air-exhaust hole  512  in the base support  510  are arranged at positions, respectively, that correspond to each other in the upward-downward direction. That is, it is desirable that the air-exhaust guidance groove  586  is positioned just over the air-exhaust hole  512 . The reason for this is to force air inside the main body  500  flowing through the air-exhaust guidance groove  586  to be introduced directly into the air-exhaust hole  512 . 
     Then, it is desirable that the PCB module  542  or the heat dissipation member  544  is mounted over the air-intake guidance hole  588  in the base plate  540 . That is, in the main body  500 , outside air flows from under a right end portion of the main body  500 , flows through the air-intake hole  514  and the air-intake guidance hole  588 , and then flows upward. Therefore, it is desirable that the PCB module  542  or the heat dissipation member  544  is mounted over the air-intake guidance hole  588  in order that heat exchange occurs when this cool outside air comes into contact with the PCB module  542  or the heat dissipation member  544 . 
     A guidance wall  587  configured to block air from flowing sideways is further formed on edges of the air-intake guidance hole  588  or the air-exhaust guidance groove  586  in the base plate  540 . That is, as illustrated, the guidance wall  587  that protrudes a predetermined distance in the upward direction is formed in the edges of the air-intake guidance hole  588  and the air-exhaust guidance groove  586 . 
     The guidance wall  587  serves as a wall of the air-intake guidance hole  588  and the air-exhaust guidance groove  586 . Thus, the guidance wall  587  prevents air flowing through the air-intake guidance hole  588  and the air-exhaust guidance groove  586  from flowing sideways and forces the air to flow only in the upward-downward direction. 
     A blocking wall  516  configured to block air from flowing sideways is further formed on an edge of the air-intake hole  514  or the air-exhaust hole  512  in the base support  510 . That is, as illustrated, the blocking wall  516  that protrudes a predetermined distance in the upward direction is formed on the edges of the air-intake hole  514  and the air-exhaust hole  512 . 
     Like the guidance wall  587 , the blocking wall  516  serves to block air from flowing sideways and to guide flowing of the air in the upward-to-downward direction. 
     A motor seating support  552  configured to support the motor assembly  600  is formed on the upper surface of the air guide  550 . The motor assembly  600  is seated on the air guide  550 . To this end, the circular motor seating support  552  having a shape corresponding to a shape of the lower end portion of the motor assembly  600  is formed on the upper surface of the air guide  550 . 
     The motor seating support  552  is configured to include a horizontal rib  552 ′, a vertical rib  552 ″, and the like. The horizontal rib  552 ′ is formed to the shape of a circular ring and supports the lower end portion of the motor assembly  600 . The vertical rib  552 ″ is formed on the horizontal rib  552 ′ in a manner that protrudes upward therefrom and blocks the motor assembly  600  from being moved sideways. 
     Specifically, an air hole  550   a  is formed in the upper surface of the air guide  550  in a manner that passes through the air guide  550  the from top to bottom. The air hole  550   a  serves to force air passing in the upward-downward direction through the motor assembly  600  to flow into the air guide  550 . 
     The motor seating support  552  is formed on an edge of the air hole  550   a.    
     Therefore, the air hole  550   a  is formed in a center portion of the horizontal rib  552 ′ of the motor seating support  552  in a manner that passes through the center portion thereof from top to bottom. 
     The air guide  550  guides discharging of air introduced into the main body  500  to below the main body  500 . Therefore, the air hole  550   a  is formed in a right-side portion of the air guide  550  in a manner that passes through the right-side portion thereof from top to bottom. The air hole  550   a  is closed at the top of the left-side portion thereof. 
     A plurality of fastening hooks  554  is provided on the air guide  550 . That is, the air guide  550  is combined with the base plate  540 . To this end, the plurality of fastening hooks  554  is provided on the air guide  550 . 
     The fastening hook  554  is inserted into the hook groove  584  in the base plate  540  for being combined therewith. Therefore, the fastening hook  554  is formed to a shape corresponding to a shape of the hook groove  584 . 
     Specifically, a support portion  554 ′ is formed in a manner that is cut from a lateral surface of the air guide  550 . The support portion  554 ′ is formed in such a manner as to have a predetermined length in the upward-downward direction. A hook portion  554 ″ is formed on a lower end portion of the support portion  554 ′ in a manner that protrudes outward from the lower end portion thereof. 
     Therefore, the hook portion  554 ″ is inserted into the hook groove  584  for being fixed thereto. 
     A fastening protrusion  556  may be further provided on the lower end portion of the air guide  550 . The fastening protrusion  556  serves to fix the air guide  550  to the base plate  540 . That is, as illustrated, a plurality of fastening protrusions  556  are provided on a left lower end portion of the air guide  550 . A left end portion of the air guide  550  may be fixed to the base plate  540  with a bolt or the like. 
     One or more PCB seating protrusions  558  are formed on a left-side upper surface of the air guide  550  in a manner that protrudes upward from the left-side upper surface thereof. Any one of the PCB modules  542  is combined with the PCB seating protrusion  558 . A seating groove  558   a  is formed in an upper end portion of the PCB seating protrusion  558  in a manner that is cut downward. A lower end portion of the PCB module  542  is accommodated in the seating groove  558   a.    
     The airtight member  560  formed of an elastic material is further provided between the motor assembly  600  and the motor seating support  552 . 
     The airtight member  560  serves to bridge a gap between the lower end portion of the motor assembly  600  and the air guide  550  in such a manner that air does not flow through the gap therebetween and, at the same time, to cushion the shock of the motor assembly  600  mounted on the air guide  550 . 
     The airtight member  560  is configured to include a combination portion  562 , a seating part  564 , and the like. The combination portion  562  covers the upper portion of the vertical rib  552 ″. The seating part  564  is formed on an inner circumferential surface of the combination portion  562  in such a manner as to extend inward from the inner circumferential surface thereof. The seating part  564  is positioned on an upper surface of the horizontal rib  552 ′. 
     Specifically, the airtight member  560  has the shape of a circular ring when viewed as a whole and is formed in such a manner as to have a size and a shape that corresponds to a size and a shape, respectively, of the motor seating support  552 . 
     Therefore, the combination portion  562  is formed on the airtight member  560  in a manner that protrudes upward therefrom. The combination portion  562  is inserted into the vertical rib  552 ″ of the motor seating support  552 . The seating part  564  is formed inside the combination portion  562  and is placed on the upper surface of the horizontal rib  552 ′. 
     A combination groove  562 ′ is further formed in a bottom surface of the combination portion  562  in a manner that is cut upward. The vertical rib  552 ″ is inserted into the combination groove  562 ′. 
     Thus, an edge of the lower end portion of the lower housing  634  of the motor assembly  600  is brought into close contact with an internal surface of the combination portion  562  of the airtight member  560  and the seating part  564  for being supported thereon. 
     Operation of the blender according to the present disclosure that has the configuration as described above will be described below with reference to the accompanying drawings. 
     The container body  100  is seated on the main body  500  as illustrated in  FIG. 1 . In this state, the blender according to the present disclosure is ready for use. 
     First, electric power needs to be supplied from the outside in order to use the blender. It is possible that the wireless electric power module  520  supplies electric power in a wireless manner. That is, it is possible that electric power is supplied from the outside using an induced electromotive force. Of course, it is also possible that electric power is supplied in a wired manner. 
     The wireless electric power module  520  supplies electric power to components, such as the motor assembly  600 , the touch operation unit  504 , and the electric power transmission unit  700 , that need electric power for operating. The user may operate the blender or may stop operating the blender by operating the touch operation unit  504  or the knob  502 . 
     For example, when the user operates the touch operation unit  504  or the knob  502 , the motor assembly  600  operates, blades of the blade assembly  200  are rotated, and then food is chopped into small pieces. 
     At this time, the detection system determines whether or not the container lid  400  is attached. In this case where the container lid  400  is not attached, the motor assembly  600  and the blade assembly  200  do not operate. 
     Specifically, the reed switch  234  is turned off when the blender is not in use. Therefore, the electric power reception unit  220 , the reed switch  234 , the optical transmission module  810 , and the like do not form a closed circuit within the container body  100 , and thus light reception does not occur in the optical reception module  820 . 
     When the light reception does not occur in the optical reception module  820 , with a signal/no signal representing the non-occurrence of the light reception, the motor assembly  600  is blocked from receiving electric power. 
     When the container lid  400  is attached in this state, the permanent magnet  232  of the container lid  400  is positioned in proximity to the reed switch  234 , and thus the reed switch  234  is turned on. In return, the electric power reception unit  220 , the reed switch  234 , the optical transmission module  810 , and the like form the closed circuit. Accordingly, the optical reception module  820  receives light that occurs in the optical transmission module  810 . 
     Thus, when it is detected that the container lid  400  is attached, the motor assembly  600  starts to operate according to a user&#39;s operation. The food inside the container body  100  is chopped into small pieces. Of course, at this time, it is desirable that the container body detection switch  960  or the like also detects whether or the container body  100  is mounted on the main body  500 , and thus that the motor assembly  600  starts to operate. 
     At this time, an operating state of the blender according to the present disclosure is displayed on the display unit  506  to be viewed from the outside. Thus, the user may visually recognize the operating state, operation time, and the like of the blender. 
     When attaching or detaching the container lid  400  on and from the container body  100 , the user attaches or detaches the container lid  400  while holding an upper portion of the cap  450  with their hand. The user presses the container lid  400  in a direction of motion from upward to downward, and thus the container lid  400  is brought into close contact with the upper surface of the container body  100 . At this time, the gasket  402  provided on an external surface of the container lid  400  bridges a gap between the container lid  400  and the container body  100 . 
     In addition, the user may separate the cap  450  mounted on the center portion of the container lid  400  from the center portion thereof. As described above, the user may perform this separation operation by rotating the cap  450  while holding the upper end portion thereof with their hand. 
     When the cap  450  is separated from the container lid  400 , the user may place food into the container body  100  through the cover hole  401  or may stir food inside the container body  100  using a rod or the like. 
     When, with the operation of each of the motor assembly  600  and the blade assembly  200 , an operation of grinding food inside the container body  100  or an operation of mixing food inside the container body  100  is finished according to the user&#39;s intention, the user may lift the container body  100  upward from the main body  500  to separate therefrom, and then may detach the container lid  400  to take the food out of the container body  100 . 
     The cooling fan  610  connected to the lower end portion of the motor shaft  622  is rotated by the operation of the motor assembly  600 . 
     The rotation of the cooling fan  610  introduces outside air into the main body  500 , and then discharges the outside air to below the main body  500 . 
     Specifically, as illustrated in  FIG. 9 , the rotation of the cooling fan  610  forces outside air below the main body  500  to be introduced upward along the inside surface of the air-intake hole  514  formed adjacent to a right end portion of the base support  510 . 
     Heat exchange occurs while the outside air introduced along the air-intake hole  514  ascends along the inside surface of the air-intake guidance hole  588  in the base plate  540  and flows through the PCB module  542 , the heat dissipation member  544 , and the like that are provided above the base plate  540 . That is, the PCB module  542  and the heat dissipation member  544  exchange heat with the outside air, and thus are cooled. 
     Then, the outside air flows to a great height in the center inside the main body  500  and is introduced into the motor assembly  600  through the housing hole  638  formed in the upper surface of the motor housing  630 . 
     The air introduced into the motor assembly  600  cools the motor  620  through heat exchange with a coil inside the motor  620 . Thereafter, the air is discharged to below the motor assembly  600 , flows through the air hole  550   a  in the air guide  550 , and then flows into the air guide  550 . 
     The air that is forced to flow sideways by the cooling fan  610  inside the air guide  550  flows to the left side of the air guide  550 , flows through the air-exhaust guidance groove  586  formed adjacent to the left end portion of the air plate  540 , and flows downward. Thereafter, the air flows through the air-exhaust hole  512  formed adjacent to a left end portion of the base support  510  and is discharged to below the main body  500 . 
     Along the way, the air introduced into the main body  500  is discharged back to the outside of the main body  500 . Along the way, electronic components inside the main body  500  are cooled. 
     The present disclosure is not limited to the embodiments described above. It would be apparent to a person of ordinary skill in the art that various modifications will be made to the embodiments of the present disclosure without departing the scope of the present disclosure.