Patent Publication Number: US-2023157486-A1

Title: Blender

Description:
TECHNICAL FIELD 
     The present disclosure relates generally to a blender. More particularly, the present disclosure relates to a blender which has the function of detecting whether a container lid is closed by transmitting an electrical signal through a transparent film. 
     BACKGROUND ART 
     Generally, a blender is referred to as a mixer or crusher, and is mainly used for crushing or chopping food contained in a container body by rotating blades by the rotation of a motor. 
     In a normal blender, a main body having a motor operated by electricity is located at the lower side of the blender, and the container body receiving food is seated on the upper side of such a main body. Blades crushing or chopping food are provided inside the container body, and are rotated by the rotational force of the motor. 
     Accordingly, when a user drives the motor by using a manipulation button or a knob of the main body after putting food in the container body, the blades receiving the rotational force generated by the motor crush or chop food contained inside the container body. 
     Various types of blenders have recently been developed in accordance with a user&#39;s desire to facilitate the food intake of office workers due to their busy daily life. That is, a small hand blender has been developed, and a blender has been developed that allows food to be crushed in a larger capacity or at high speed. 
     Additionally, a vacuum blender which cuts or crushes food by vacuumizing the inside of a container body so that the food accommodated in the container body of the blender can be processed in a fresher state is also disclosed. 
     However, what is increasingly emphasized in these various types of blenders is safety along with the taste and nutrition of food processed by these machines. That is, when blades rotate while a container lid is open, food contained in the container body is thrown out and scattered, and an accident may occur when a child puts his or her finger inside the container body. 
     Accordingly, a technology for detecting whether a container lid is mounted has been developed and disclosed. 
     For example, as disclosed in U.S. Pat. Nos. 6,910,800 and 7,871,196, a push rod which physically connects a container body with a main body is installed, and when the container lid closes the container body, the container lid presses the push rod. 
     Specifically, in U.S. Pat. No. 6,910,800, a link is provided longitudinally along the side surface of the container body, and when the container lid at an upper side is closed, the protrusion of the container lid presses the upper end of the link downward such that the lower end of the link is moved downward, so the closing of the container lid of the container body can be mechanically detected. 
     Additionally, in U.S. Pat. No. 7,871,196, a link which transmits the closing of the container lid to the upper and lower sides of the container body is not provided on the side surface of the container body, but is provided inside the handle of the container body. That is, a push rod installed to be vertically long is installed in the groove of the inside of the handle, and when the push rod is moved downward by the closing of the container lid at the upper side, a switch provided at a lower side is activated by the push rod to detect the closing of the container lid. 
     However, in these conventional technologies, a separate push rod or push block is required to be installed, and the link or push rod installed to be vertically long is required to be installed according to the length of an associated part, and thus manufacturing and assembly thereof are difficult, and the link or push rod is worn or damaged due to frequent use thereof, which causes the loss of a detection function. Additionally, the link or push rod having a considerably long length may not perform a detection function (a signal transmission function) due to the twisting or bending of the link or push rod. 
     In addition, the push rod and a press detection part are required to be separately installed, and the press detection part may be contaminated due to moisture or food introduced thereinto, and the push rod of the container body and the press detection part of the main body are required to be respectively installed at positions corresponding to each other, so the container body is required to be installed only in a specific direction. 
     Furthermore, as in the conventional technology, in a connection structure of transmitting a signal to the upper and lower sides of the container body by using a mechanical structure (or wire), when the container body is formed to be transparent or translucent, at least a portion of the container body is required to be opaque such that a transmission mechanism or wire is not seen from the outside, thereby reducing the degree of design freedom. 
     In addition, recently, US Patent Application Publication No. 2018-0020875 discloses an interlocking blending device in which a pair comprised of a transmission coil and a reception coil is arranged in a main body and a pair comprised of a reception coil and a transmission coil is arranged in a container body by corresponding to the coils, and when a container lid closes the container body, power is transmitted to the reception coil of the container body through the transmission coil of the main body and is transmitted back to the reception coil of the main body through the transmission coil of the container body such that the main body recognizes the closing of the container lid of the container body. 
     That is, US Patent Application Publication No. 2018-0020875 discloses a structure of allowing or disallowing signal transmission in which a push rod is installed vertically along the side surface of the container body such that the signal of detecting the closing of the container lid is mechanically transmitted to the lower side of the container body, and according to the turning on/off of the switch of the upper side of the container body by the container lid, a circuit connected between the upper side of the container body and a lower side thereof is opened or closed so as to allow or disallow signal transmission to a base. 
     However, in such a conventional technology, a connection wire for the connection of two switches of the upper end part of the container body and for transmitting an electrical signal between the upper and lower ends of the container body is installed to connect the periphery of the upper end of the container body with the upper and lower ends of the container body. 
     Accordingly, since this connection wire is installed on the periphery of the upper end of the container body or is vertically installed on the side surface of the container body, the appearance of the transparent container body is damaged. That is, a connection wire for transmitting an electrical signal is installed on the surface of the container body and thus may be cut by external interference, or a colored connection wire is installed on the transparent container body, which may damage the design of the container body. 
     DISCLOSURE 
     Technical Problem 
     Accordingly, the present disclosure has been made to solve the above problems occurring in the prior art, and the present disclosure is intended to provide a blender which electrically transmits the detection signal of the closing of a container lid of a container body to a main body. 
     The present disclosure is intended to provide a blender which can maintain the design of the container body made of a transparent material. 
     The present disclosure is intended to provide a blender which is provided with a handle having improved beauty, soft touch, and degree of design freedom. 
     The present disclosure is intended to provide a blender in which a transparent electrode film is prevented from being electrically disconnected by external impact or vibration. 
     The present disclosure is intended to provide a blender in which during the assembly of the transparent electrode film, the transparent electrode film is prevented from being physically damaged even when a pulling force or other external forces are applied to the transparent electrode film. 
     Technical Solution 
     In order to accomplish the above objectives, according to the characteristic of the present disclosure, a blender of the present disclosure may include a detection system which detects whether a container lid is mounted through an electrical signal. 
     In the present disclosure, a transparent electrode film may be provided between the upper and lower ends of a container body. Accordingly, without damage to the design of the container body which is transparent, a signal of the upper end of the container body may be transmitted to the lower end thereof. 
     In the present disclosure, the transparent electrode film may have multiple layers. Accordingly, a transmission member made of a conductive member may be protected from the outside. 
     In the transparent electrode film of the present disclosure, the transmission member which transmits an electrical signal may be configured to be printed on a base film. 
     In the transparent electrode film of the present disclosure, the transmission member which transmits an electrical signal may be configured to be covered by a cover film. 
     In the present disclosure, the transparent electrode film may be attached and fixed to the container body by a fixing member having an adhesive function. 
     In the present disclosure, the transparent electrode film may be configured as a single member. Accordingly, the transparent electrode film may be prevented from being cut or separated into two or more films even when an external force is applied to the transparent electrode film. 
     The transparent electrode film of the present disclosure may be provided with a support part so as to supplement resistance against external force. 
     The transparent electrode film of the present disclosure may include at least one groove to prevent damage or tearing thereof due to bending thereof. 
     The transparent electrode film of the present disclosure may be provided with at least one reinforcement piece which reinforces the rigidity of the transparent electrode film. 
     The transparent electrode film of the present disclosure may be coupled to the container body by a hook fastening method. 
     The blender of the present disclosure may include the container body in which food is accommodated; a main body provided under the container body so as to support the container body; the container lid mounted detachably on the upper surface of the container body so as to open and close the upper side of the container body; and the detection system which detects whether the container lid is mounted on the container body, wherein the detection system may include the transparent electrode film configured to have multiple layers so as to guide the flow of electricity. 
     In addition, the transparent electrode film may include the transmission member which transmits an electrical signal, and the base film on which the transmission member is printed. 
     The cover film which supports the transmission member may be provided at one side of the transmission member. 
     The fixing member which allows the transparent electrode film to be attached to the container body may be provided at the one side of the transmission member. 
     One surface of the fixing member may be in contact with one surface of the cover film. 
     An adhesive member may be provided between the transmission member and the cover film such that the transmission member and the cover film are coupled to each other. 
     A coating layer may be formed on an end of the transmission member so as to prevent corrosion thereof. 
     The transparent electrode film may be a single member configured such that a first end thereof is connected with a second end thereof. 
     The transparent electrode film may include   a main part attached to the container body, a first bent part formed by bending and extending from a first end of the main part, and a second bent part formed by bending and extending from a second end of the main part. 
     A support part may be provided on the first bent part so as to supplement resistance against external force. 
     A tear prevention groove may be formed in the support part so as to prevent damage or tearing thereof due to bending between the main part and the first bent part. 
     A reinforcement piece may be provided at one side of the support part so as to reinforce rigidity thereof. 
     A reinforcement piece may be provided at an end of the transparent electrode film so as to reinforce rigidity thereof. 
     The end of the transparent electrode film may be coupled to the lower or upper end part of the container body by a hook fastening method. 
     A hook groove into which a hook is inserted may be formed in the end of the transparent electrode film by passing therethrough. 
     Advantageous Effects 
     The blender of the present disclosure has the following effects. 
     First, in the present disclosure, an electric circuit formed in the container body may be configured to be opened or closed depending on whether the container lid is closed such that whether the container lid is closed is electrically detected. Accordingly, compared to a conventional mechanical detection, whether the container lid is closed may be precisely detected in spite of long-term use thereof. That is, malfunction due to deformation of or damage to a link or a push rod of a conventional technology due to long-term use thereof may be prevented. 
     Second, in the present disclosure, the transparent electrode film may be attached vertically to the surface of the transparent container body such that electricity is conducted between the upper and lower sides of the container body, and thus whether the container lid is mounted may be detected. Accordingly, without damage to the external design of the transparent container body, whether the container lid is mounted may be detected. That is, the degree of the design freedom of the container body may be improved. 
     Third, in the present disclosure, the transparent electrode film, a permanent magnet, and a detection sensor may be used such that the signal of detecting the closing of the container lid of the upper end of the container body is transmitted to a lower side thereof. Accordingly, compared to the use of the link or push rod of the conventional technology, the associated parts of the present disclosure may be easily assembled and installed, and since the blender does not require a push rod or a press detection part, the blender may be light and manufacturing costs thereof may be reduced. 
     Fourth, in the present disclosure, the transparent electrode film may be configured as one single member. Accordingly, the transparent electrode film may have strong resistance against external tensile force, compared to multiple parts connected to each other. That is, as for multiple parts connected to each other, when external pulling force is applied to the multiple parts, connection portions therebetween may be fractured or damaged. In the present disclosure, the transparent electrode film may prevent the risk of this fracture, thereby improving durability. 
     Fifth, in the present disclosure, the transparent electrode film may have multiple layers, and the transmission member which transmits an electrical signal may be located inside the transparent electrode film. Accordingly, the transmission member which guides the flow of electricity may be protected from external impact or contact. 
     Sixth, in the present disclosure, the transmission member which transmits an electrical signal may be printed on the base film. Accordingly, the risk of the transmission member being cut or damaged due to external friction by protruding to the outside may be reduced. 
     Seventh, in the present disclosure, the end of the transparent electrode film may be coated with carbon. Accordingly, the connection part of the transparent electrode film may be prevented from being corroded. 
     Eighth, in the present disclosure, the transparent electrode film may further include the support part to support the secure attachment of the transparent electrode film to the container body. Accordingly, the transparent electrode film may have supplemented resistance against an external force. 
     Ninth, in the present disclosure, the tear prevention groove may be formed in the support part of the transparent electrode film. Accordingly, even when the transparent electrode film is installed by being bent, the transparent electrode film may be prevented from being damaged or torn. 
     Tenth, in the present disclosure, a separate reinforcement piece may be provided on an end part of the transparent electrode film. Accordingly, the rigidity of the transparent electrode film may be increased. 
     Eleventh, in the present disclosure, the end of the transparent electrode film may be coupled to the lower or upper end part of the container body by a hook fastening method. Accordingly, even if the blender is vibrated or impacted, or even if assembly failure by a worker occurs, the transparent electrode film may be prevented from being removed. 
     Twelfth, in the present disclosure, the hook groove into which a hook protrusion is inserted may be formed in the end of the transparent electrode film by passing therethrough, so during the coupling of the transparent electrode film, when the hook protrusion of a hook connector is inserted into the hook groove, an insertion sound of “click” may be generated. Accordingly, since a user can audibly recognize whether the connection of the end of the transparent electrode film is completed (whether normal connection thereof is performed), the assembly defect of the associated product may be prevented. 
     Accordingly, in the present disclosure, the transparent electrode film may be configured to have multiple layers such that the transmission member which transmits an electrical signal is covered by the cover film. Accordingly, overall, the transparent electrode film may be structurally strong against damage or impact caused by external interference during assembly or use, thereby securing durability. 
     In addition, the transparent electrode film may be made of one material, and ends thereof may be securely fixed by hooks, so the transparent electrode film may be prevented from being torn by external tensile force and from being removed from a position thereof by vibration or impact, thereby improving durability and usability thereof. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIG.  1    is a perspective view illustrating the configuration of a blender according to an exemplary embodiment of the present disclosure. 
         FIG.  2    is a vertical sectional view illustrating the inner configuration of the blender of the present disclosure. 
         FIG.  3    is a vertical sectional view illustrating the internal configuration of a container body constituting the blender of the present disclosure according to the embodiment. 
         FIG.  4    is a perspective view illustrating the state of a transparent electrode film mounted to the container body constituting the blender of the present disclosure according to the embodiment. 
         FIG.  5    is a top plan view illustrating the configuration of the transparent electrode film constituting the blender of the present disclosure according to the embodiment. 
         FIG.  6    is a front sectional view of the transparent electrode film illustrated in  FIG.  5   . 
         FIG.  7    is a top plan view illustrating the detailed configuration of a first bent part of the transparent electrode film constituting the blender of the present disclosure according to the embodiment. 
         FIG.  8    is a top plan view illustrating the detailed configuration of a second bent part of the transparent electrode film constituting the blender of the present disclosure according to the embodiment. 
         FIG.  9    is an exploded perspective view illustrating the detailed configuration of the transparent electrode film constituting the blender of the present disclosure according to the embodiment. 
         FIG.  10    is a top plan view illustrating a state in which the transparent electrode film, a power reception means, and a detection sensor constituting the blender of the present disclosure are coupled to each other according to the embodiment. 
         FIG.  11    is a top plan view illustrating a state in which the transparent electrode film, the power reception means, and the detection sensor constituting the blender of the present disclosure are removed from each other according to the embodiment. 
         FIG.  12    is a partially sectional view illustrating a state in which the transparent electrode film is inserted into a hook connector constituting the blender of the present disclosure according to the embodiment. 
         FIG.  13    is a partially sectional view illustrating a state in which the transparent electrode film is removed from the hook connector constituting the blender of the present disclosure according to the embodiment. 
     
    
    
     MODE FOR INVENTION 
     Hereinafter, a blender of the present disclosure will be described in detail with reference to the accompanying drawings. 
       FIGS.  1  and  2    are a perspective view and a vertical sectional view, respectively, illustrating the configuration of the blender according to an embodiment of the present disclosure. 
     As illustrated in these drawings, the blender of the present disclosure may include a container body  100  located relatively at the upper side thereof and configured to receive food, and a main body  500  provided at the lower side of the container body  100  and configured to support the container body  100 . 
     The container body  100  may be a part in which food is received and the process of cutting or crushing the food occurs, and the main body  500  may support the container body  100 . Furthermore, multiple parts may be provided inside such a main body  500  to control the cutting or crushing of the food received in the container body  100 , or to supply electric power. 
     The container body  100  may have a cylindrical shape as a whole, and the upper surface thereof may be configured to be open to introduce food thereinto. 
     The container body  100  may be made of a transparent material such that the inside thereof can be seen from the outside. That is, the container body  100  may be made of glass or transparent plastic so that a user can check the state of food contained inside the container body  100  from the outside. 
     A blade assembly  200  may be provided in the inner lower portion of the container body  100 . The blade assembly  200  may have multiple blade units mounted rotatably thereto such that the blade units chop or crush food received in the container body  100 . 
     The blade assembly  200  may be connected to a motor assembly  600  to be described below, and be configured to be rotated by a rotational force generated by the motor assembly  600 . 
     The container body  100  may be formed to have a double structure. That is, the container body  100  may be composed of an outer container body  110  constituting the appearance thereof and an inner container body  120  provided inside the outer container body  110 . The outer container body  110  and the inner container body  120  may be configured to be in contact with each other or to be spaced apart by a predetermined distance from each other. Furthermore, only a portion of each of the outer container body  110  and the inner container body  120  may be configured to be in contact with each other. 
     At least one inner guide  122  may be provided in the container body  100  to have a predetermined length in a vertical direction. The inner guides  122  are intended to guide food rotating in the container body  100 , and may be configured in pairs symmetrical to each other in the front and rear or left and right of the inner container body  120 . 
     A handle  300  grasped by a user may be formed on the right surface of the container body  100  by protruding therefrom to the right side. Such a handle  300  may be configured such that a user can grasp the handle with his or her one hand, and in the present disclosure, the upper end of the handle is illustrated to be connected integrally to the upper surface of the container body  100 . 
     Meanwhile, a spout  210  may be formed at the opposite side to the handle  300 . 
     As illustrated in  FIG.  2   , the spout  210  may be formed on the upper end of the left surface of the container body  100 , and may be a part through which food completely crushed in the container body  100  is guided to be easily poured to the outside. Accordingly, such a spout  210  may be configured to more protrude gradually upward in the left direction. 
     The upper surface of the container body  100  may be covered by a container lid  400 . That is, the container lid  400  may be removably mounted to the upper surface of the container body  100 , and open and close the upper surface of the container body  100 . 
     The container lid  400  may cover the upper surface of the container body  100  such that food contained in the container body  100  is not removed to the outside and foreign matter of the outside is not introduced into the container body  100 . 
     The container lid  400  may be configured to be mounted to the container body  100  by pressing or rotating the container lid  400  by a user. A gasket  402  may be provided in the outer circumferential surface of the container lid  400  and block a gap between the container lid  400  and the container body  100 . Of course, such a gasket  402  may function to allow the container lid  400  to be pressed and fitted to the container body  100 . 
     A cap  450  may be provided in the container lid  400 . That is, a lid hole  401  which is a circular hole having a predetermined size may be formed vertically through the center of the container lid  400 , and the cap  450  may be mounted to such a lid hole  401  and cover the lid hole  401 . 
     As illustrated in the drawings, the cap  450  may be installed at the center of the container lid  400 , and as a whole, may be formed to have a diameter smaller than the diameter of the container lid  400 . The cap  450  may be removably mounted to the container lid  400  by forcible fitting by pressing or by rotating. 
     In the present disclosure, it is illustrated that the cap  450  is configured to be attached to and detached from the container lid  400  by being rotated, and a detailed configuration thereof will be described below. 
     Since the cap  450  may be removably mounted to the container lid  400 , a user may see food contained inside the container body  100  by opening only the cap  450  without opening the container lid  400 , and insert food into the container body  100  by opening the cap  450 , or insert a mixing rod thereinto and stir the food contained inside the container body  100 . 
     The upper end of the cap  450  may be configured by protruding toward a side upper than the upper end of the container lid  400 , so the cap  450  may function as the handle of the container lid  400  grasped by a user when the user opens or closes the container lid  400 . 
     As illustrated in the drawings, the main body  500  may be configured to have a hexahedral shape having the shape of a rectangular barrel as a whole and be provided under the container body  100  so as to support the container body  100 , wherein the motor assembly  600  and multiple electronic parts such as a PCB (a printed circuit board) may be installed inside the main body  500 . Of course, the external shape of such a main body  500  may be variously changed as required. 
     The motor assembly  600  may be provided at the center of the inside of the main body  500 . The motor assembly  600  may generate a rotational force by power supplied from the outside such that the blades constituting the blade assembly  200  rotate. 
     Accordingly, the lower end of the blade assembly  200  may be connected to the upper end of the motor assembly  600 . 
     A knob  502  may be provided on the front surface of the main body  500  by protruding forward therefrom. The knob  502  is intended to set the operation of the blender of the present disclosure, and may be rotatably mounted to the main body  500 . 
     The knob  502  may be configured to control the operation intensity of the motor assembly  600 . That is, the knob  502  may be configured to change the rotational speed of the motor assembly  600  to high speed or low speed by the clockwise or counterclockwise rotation of the knob  502 . 
     Meanwhile, a manipulation part  504  may be provided on the upper surface of the main body  500 . 
     The manipulation part  504  is intended to manipulate the blender of the present disclosure by touching, and may be configured to manipulate the starting and stopping of the operation of the blender. 
     Of course, the knob  502  and the manipulation part  504  may be configured to selectively set or manipulate the operation of the blender, or may be configured to overlap each other in the functions of the setting and manipulating. That is, for convenience, the knob  502  and the manipulation part  504  may be configured to overlap each other in the functions such that a user may select any one of the knob  502  or the manipulation part  504  to set or manipulate the operation of the blender. 
     A display part  506  may be provided at a side of the manipulation part  504  (a left side of  FIG.  1   ). That is, the display part  506  may be provided on the upper surface of the main body  500 . Such a display part  506  may function to display the state of the operation of the blender such that a user can check the state thereof. Accordingly, such a display part  506  may be configured as a seven-segment display. 
     A cooling fan  610  may be provided at the lower side of the motor assembly  600 . 
     The cooling fan  610  may be connected to the lower end of the motor assembly  600  and be rotated by a rotating force generated by the motor assembly  600 , thereby introducing an outside air into the main body  500  and forcing the flow of the air. Accordingly, the cooling fan  610  may allow air to be introduced into the main body  500  from the outside and to flow therein, and function to cool parts such as the PCB provided in the main body  500 . 
     A base end  510  may be provided on the lower surface of the main body  500 . 
     The base end  510  may be formed by protruding downward from the lower surface of the main body  500  and may have a space having a predetermined size therein to receive a wireless power module  520 . The wireless power module  520  may function to receive external wireless power in a wireless method using induced electromotive force and to supply the wireless power to the motor assembly  600  provided inside the main body  500 . 
     Meanwhile, a detection system may be provided in the main body  500  and the container body  100  described above so as to detect whether the container lid  400  is mounted to the container body  100 . 
     The detection system may allow an electric circuit (not shown) which can be turned on and off to be formed in the container body  100 , and allow such an electric circuit to form a closed circuit, so that the detection system may be configured to detect whether electric current flows in the closed circuit by voltage supplied by the main body  500 . 
     More specifically, the detection system may include: a power transmission means  700  provided in the main body  500  and configured to supply power to the container body  100 ; a power reception means  220  provided in the container body  100  and configured to receive the power supplied by the power transmission means  700 ; an on/off means  230  provided at the upper side of the container body  100  and configured to turn on/off the electric circuit formed in the container body  100  depending on whether the container lid  400  is closed; a transparent electrode film  240  made of a transparent material provided on a surface of the container body  100  and connecting the power reception means  220  and the on/off means  230  to each other so as to allow electricity to flow therebetween; and a detection means  800  provided on one side of the main body  500  or the container body  100  and allowing the electric circuit formed by the connection of the power reception means  220  with the on/off means  230  to form a closed circuit so as to detect whether electric current flows. 
     The power transmission means  700  is intended to transmit power, which is introduced to the main body  500  from the outside of the main body  500  or stored in advance in the main body  500 , to the container body  100 , and may use an induction coil in which induced electromotive force can be generated. 
     The power reception means  220  is intended to receive the power transmitted from the main body  500 , and may be configured to have a structure corresponding to the structure of the power transmission means  700 . That is, the power reception means  220  may use a coil such that power is transmitted by induced electromotive force generated between the power transmission means  700  and the power reception means  220 . 
     The power transmission means  700  and the power reception means  220  may be located to be adjacent to each other so as to generate induced electromotive force. Accordingly, in the present disclosure, the power transmission means  700  is illustrated to be mounted to the right upper end of the main body  500 , and the power reception means  220  is illustrated to be mounted to the right lower end of the container body. 
     The on/off means  230  may be configured to turn on/off the electric circuit (not shown) formed in the container body  100  depending on whether the container lid  400  is mounted to the container body  100 , and may include a permanent magnet  232  and a detection sensor  234  provided in the container lid  400  and the container body  100 , respectively. 
     As illustrated in  FIG.  2   , in the present disclosure, the permanent magnet  232  is illustrated to be mounted to the right edge of the container lid  400 , and the detection sensor  234  is illustrated to be mounted to the right upper end (a portion of the handle) of the container body  100 . 
     More specifically, the detection sensor  234  may be mounted to be received in a reed switch groove  236  formed in the upper end portion of the handle  300 . 
     The detection sensor  234  may be configured as a device which can detect a magnet or magnetic field, such as a reed switch or a Hall sensor. 
     It is widely known that the reed switch has magnetic movable contacts enclosed in a glass tube, and when a magnet approaches the reed switch, the contacts in the glass tube contact with each other. 
     In addition, a Hall sensor may detect the direction and magnitude of a magnetic field by using a Hall effect that a voltage is generated in a direction perpendicular to a current and the magnetic field when the magnetic field is formed in a conductor in which the current flows, and may be a sensor using the effect of generating electric potential difference due to the voltage generated in this case. 
     Accordingly, the reed switch or Hall sensor is a component which is widely used, and here, further detailed description of the detailed configuration and principle thereof will be omitted. 
     Of course, except for the use of the permanent magnet  232  and the detection sensor  234  as such an on/off means  230 , other electric on/off means or mechanical structures may be used to turn on/off the electric circuit, and the mounting positions of the permanent magnet  232  and the detection sensor  234  respectively mounted to the container lid  400  and the container body  100  may be exchanged oppositely. 
     Various types of electrical devices or structures having a function that can detect whether electric current flows in the electric circuit formed in the container body  100  turned on/off by the on/off means  230  may be used as the detection means  800 . However, in the present disclosure, a photosensor is used to detect light as an example. 
     Accordingly, the detection means  800  may include a light transmission module  810  provided in the container body  100  to generate light, and a light reception module  820  provided in the main body  500  to receive the light transmitted by the light transmission module  810 . 
     The light transmission module  810  and the light reception module  820  may be located at positions adjacent to each other. In the present disclosure, as illustrated in  FIG.  2   , the light transmission module  810  may be located on the left lower end of the container body  100 , and the light reception module  820  may be located on the left upper end of the main body  500 . 
     The light transmission module  810  may use an LED that emits light by electricity, and the light reception module  820  may use the photosensor that receives light and converts the light into an electrical signal. 
     In addition, the transparent electrode film  240  may be provided between the outer container body  110  and the inner container body  120 . More particularly, the transparent electrode film  240  may be attached to the inner surface of the outer container body  110 . 
     The transparent electrode film  240  may be made of a member such as a conductive member which can transmit electricity. For example, the transparent electrode film  240  may be made of a transparent material such as an ITO film (an indium-tin oxide film). 
     The transparent electrode film  240  may be attached to the surface of the container body  100  and may allow the on/off means  230  provided on the upper side of the container body  100  to be connected to the power reception means  220  and the light transmission module  810  provided on the lower end portion of the container body  100  so as to form the electric circuit. 
     Accordingly, the transparent electrode film  240  may be attached vertically and longitudinally on the surface of the container body  100  made of a transparent material and may function to guide the transmission of an electrical signal between the upper and lower ends of the container body  100 . 
     Accordingly, when the container body  100  is made of a transparent material, and the transparent electrode film  240  is also made of a transparent material, the transparent electrode film  240  may not be visually exposed, so the appearance of the container body  100  may not be damaged and the design thereof may be maintained. 
     Additionally, when the transparent electrode film  240  is attached to the surface of the container body  100 , the transparent electrode film  240  may have a hole formed therein to remove air bubbles that may be generated between attached surfaces. That is, a perforated hole may be added to the center of the transparent electrode film  240  made of the ITO film to allow the air bubbles to escape therethrough such that the generation of the air bubbles is prevented. 
     Meanwhile, a seating step  900  may be formed on the upper surface of the main body  500  by protruding upward therefrom. 
     The seating step  900  may be configured to have a circular shape corresponding to the shape of the lower end of the container body  100  such that the lower end of the container body  100  is mounted to the seating step  900  to be vertically removed therefrom. 
     Furthermore, the container body  100  may be configured as a double structure. That is, the container body  100  may be composed of the outer container body  110  and the inner container body  120 , and the inner guides  122  may be formed on the inner surface of the inner container body  120  by protruding inward therefrom. 
     More specifically, the container body  100  may be configured as a double structure having a cylindrical shape as a whole. That is, the container body  100  may include the outer container body  110  constituting the appearance thereof, and the inner container body  120  provided inside the outer container body  110 . 
     The container body  100 , that is, the outer container body  110  and the inner container body  120  may be made of a transparent material. That is, the container body  100  may be made of a transparent material such as glass, Tritan, or transparent plastic such that a user can check the state of food contained inside the container body  100  from the outside. 
     The outer container body  110  may constitute the appearance of the container body, and be configured to have a cylindrical shape with the same top and bottom sizes, and the handle  300  may be formed on the outer right surface of the outer container body  110  by protruding therefrom to the right such that a user can grasp the handle. 
     The handle  300  may be formed to have an L shape, and the upper end portion thereof may be connected to the right upper end of the outer container body  110 . 
     The reed switch groove  236  in which the detection sensor  234  is received may be formed inside the handle  300 . That is, the reed switch groove  236  may be formed in the upper end of the handle  300 , and may provide space to mount the detection sensor therein, and the left of such a reed switch groove  236  may be open. 
     Hereinafter, the configuration of the transparent electrode film  240  installed on the container body  100  will be described in detail. 
       FIG.  3    illustrates the vertical sectional view of the internal configuration of the container body  100 , and  FIG.  4    illustrates a perspective view showing the state of the transparent electrode film  240  mounted to the container body  100 . 
     As illustrated in these drawings, the transparent electrode film  240  which is a component constituting the detection system which detects whether the container lid  400  is mounted on the container body  100 , may function to detect whether the container lid  400  is mounted from the upper end part of the container body  100  and to transmit an associated signal to the lower end part of the container body  100 . 
     The transparent electrode film  240  may be configured as a single member configured such that a first end thereof is connected with a second end thereof. That is, the transparent electrode film  240  may not be formed by coupling at least two members to each other, but may be formed as a long single body in the form of an integral film wire. 
     Accordingly, when the transparent electrode film  240  is made as a single integral film wire without an intermediate joint, cutting or damage at joints produced when the transparent electrode film consists of multiple parts may be reduced, so the durability of the transparent electrode film  240  may be basically secured. 
     In addition, the end of the transparent electrode film  240  may be configured to be coupled to the lower or upper end part of the container body  100  by a hook fastening method. That is, the upper end of the transparent electrode film  240  may be located on the upper end part of the container body  100 , and the lower end of the transparent electrode film  240  may be located on the lower end part of the container body  100  such that a signal or electricity generated in the upper end of the container body  100  is transmitted to the lower end part of the container body  100 . 
     More specifically, the upper end of the transparent electrode film  240  may be located on the upper end of the handle  300 . That is, the upper end of the transparent electrode film  240  may be connected to the detection sensor  234  received and installed in the reed switch groove  236  formed in the upper end part of the handle  300 . 
     The transparent electrode film  240  may include a main part  242  attached to the container body  100 , a first bent part  244  formed by bending and extending from a first end of the main part  242 , and a second bent part  246  formed by bending and extending from a second end of the main part  242 . 
     More specifically, as illustrated in the drawing, the transparent electrode film  240  may be formed to be vertically long, and may include the main part  242  attached to the side surface of the container body  100 , the first bent part  244  formed by bending laterally and extending from the lower end of the main part  242 , and the second bent part  246  formed by extending and bending at least one time from the upper end of the main part  242  so as to be received inside the handle  300 . 
     As illustrated in the drawing, the first bent part may be laterally so as to be perpendicular to the main part  242  as a whole, and may be bent at predetermined angles at least two times. This is because there is a risk that the transparent electrode film  240  may be cut when the transparent electrode film  240  is bent vertically in any one place. 
     A support part  250  may be provided on the first bent part  244  so as to supplement resistance against external force. That is, the support part  250  may be formed on the end (a right end in each of  FIGS.  3  and  4   ) of the first bent part  244  connected with the main part  242 . The support part  250  may function to supplement resistance against puling force applied to the transparent electrode film  240 . 
     Meanwhile, a tear prevention groove  252  may be formed in the support part  250  so as to prevent damage or tearing thereof due to bending between the main part  242  and the first bent part  244 . That is, as illustrated in the drawing, at least one tear prevention groove  252  may be formed in at least one end (a right end in  FIG.  4   ) of the support part  250  in contact with the main part  242  by being recessed leftward therefrom (in  FIG.  4   ). 
     In addition, the end (a left end in  FIG.  4   ) of the first bent part  244  may be provided with a power connection end  244   a  connected with the power reception means  220 , and the end (an upper end in  FIG.  4   ) of the second bent part  246  may be provided with a sensor connection end  246   a  connected with the detection sensor  234 . 
     In  FIGS.  5  to  9   , the detailed configuration of the transparent electrode film  240  is illustrated. That is,  FIGS.  5  and  6    respectively illustrate the top plan view and front sectional view of the transparent electrode film  240 , and  FIGS.  7  and  8    respectively illustrate top plan views showing the configurations of the first bent part  244  and the second bent part  246  of the transparent electrode film  240 . In addition,  FIG.  9    illustrates an exploded perspective view showing the detailed configuration of the transparent electrode film  240 . 
     As illustrated in these drawings, the support part  250  may be provided on the first bent part  244  so as to supplement resistance against external force or pulling force, wherein the tear prevention groove  252  may be formed in an end of the support part  250  (a left end in  FIG.  5   , and a right end in  FIG.  7   ) so as to prevent damage or tear due to bending of the support part. 
     A hook groove  248  into which a hook is inserted may be formed in the end of the transparent electrode film  240  by passing therethrough. That is, as illustrated in the drawings, the hook groove  248  may be formed through each of the end of the first bent part  244  (a left rear end in  FIG.  7   ) and the end of the second bent part  246  (a right end in  FIG.  8   ), and a hook provided in the power reception means  220  or the detection sensor  234  may be selectively inserted into the hook groove  248 . 
     As illustrated in the drawing, the hook groove  248  may include a pair of hook grooves. In addition, the size and shape of each of the hook grooves  248  may have size and shape corresponding to a hook to be coupled thereto. 
     The transparent electrode film  240  may be configured to have multiple layers so as to guide the flow of electricity. 
     The transparent electrode film  240  may include a transmission member  260  which transmits an electrical signal, a base film  261  on which the transmission member  260  is printed, a cover film  262  which is provided at one side of the transmission member  260  and supports the transmission member  260 , and a fixing member  263  which is provided at one side of the transmission member  260  and allows the transparent electrode film  240  to be attached to the container body  100 . 
     Specifically, the transmission member  260 , which constitutes the main frame of the transparent electrode film  240 , may include the main part  242 , the first bent part  244 , and the second bent part  246  as described above, and may have the power connection end  244   a  and the sensor connection end  246   a  provided respectively on the opposite ends of the transmission member  260 . 
     As illustrated in the drawing, the base film  261  may be formed to have a shape corresponding to the transmission member  260  as a whole. In addition, the support part  250  described above may be formed on the base film  261 . 
     The transmission member  260  may be printed on the base film  261 . That is, the transmission member  260  may be made of a silver paste material which has the thickness of 0.2 mm or less and through which electricity flows, and may be printed on the base film  261 . 
     The cover film  262  may cover one surface of the transmission member  260  and may be made of polyethylene terephthalate (PET). As illustrated in  FIG.  9   , the cover film  262  may be provided on the upper side of the transmission member  260  (in  FIG.  9   ), and may support the transmission member  260 . That is, overall, the cover film  262  may serve as a support for the transparent electrode film  240 . 
     In addition, as illustrated in the drawing, the cover film  262  may be configured to have shape and size corresponding to the shape and size of the base film  261 . Accordingly, the cover film  262  may be stacked on the base film  261 , and the transmission member  260  may be located between the cover film  262  and the base film  261 . 
     The fixing member  263  may be provided at a side of the transmission member  260  (an upper side in  FIG.  9   ), and may function to attach the transparent electrode film  240  to the container body  100 . 
     As illustrated in the drawing, the fixing member  263  may be formed in the shape of a tape having a predetermined length as a whole, and may be formed to have length and width corresponding to the length and width of the main part  242  of the transmission member  260 . That is, the fixing member  263  may function to attach and fix the transparent electrode film  240  to the container body  100 , and thus may have a size corresponding to the size of the main part  242  of the transparent electrode film  240 . 
     One surface of the fixing member  263  may be installed to be in contact with one surface of the cover film  262 . That is, as illustrated in the drawing, the fixing member  263  may be made as an adhesive member such as a double-sided tape, and the lower surface of the fixing member  263  (in  FIG.  9   ) may be installed to be in contact with the upper surface of the cover film  262  (in  FIG.  9   ). 
     An adhesive member  264  may be provided between the transmission member  260  and the cover film  262  such that the transmission member  260  and the cover film  262  are coupled to each other. 
     The adhesive member  264  may be made of a material including an adhesive such as a double-sided tape, and may allow the transmission member  260  and the cover film  262  to be attached to each other. 
     Meanwhile, as illustrated in the drawing, the adhesive member  264  may be formed to have shape and size corresponding to the shape and size of each of the base film  261  and the cover film  262 . Accordingly, the support part  250  of the base film  261  and the support part  250  of the cover film  262  may be attached to each other by the support part  250  of the adhesive member  264 . 
     In addition, a coating layer  265  may be formed on the end of the transmission member  260  so as to prevent corrosion thereof. That is, the end of the transmission member  260  which is the contact part of the transmission member  260  made of a silver paste material may be coated with carbon so as to prevent corrosion of the contact part. 
     Such carbon coating may be selectively performed on the upper or lower surface of the end of the transmission member  260  or may be performed on all of the upper and lower surfaces thereof. That is, the coating layer  265  may be formed on one surface of the end of the transmission member  260 , and may be formed to cover the entirety of the end thereof. 
     A reinforcement piece  266 ,  267 , or  268  may be provided on an end of the transparent electrode film  240  so as to reinforce rigidity thereof. The reinforcement piece  266 ,  267 , or  268  may be a stiffener for reinforcing the rigidity of the transparent electrode film  240 , and may be provided at least on each of the ends of the first bent part  244  and the second bent part  246  of the transparent electrode film  240 . That is, a bending reinforcement piece  266  may be provided on the end of the first bent part  244  of the transparent electrode film  240 , and a connector reinforcement piece  267  may be provided on the end of the second bent part  246 . 
     Of course, as illustrated in  FIG.  9   , the reinforcement piece  266 ,  267 , or  268  may be further provided even on one side of the support part  250  so as to supplement rigidity thereof. That is, a support reinforcement piece  268  may be provided on the lower side (in  FIG.  9   ) of the support part  250  so as to reinforce the rigidity of the support part  250 . 
     In addition, the reinforcement piece  266 ,  267 , or  268  may be attached and fixed to the base film  261  by an adhesive. Specifically, the bending reinforcement piece  266  may be attached to the first bent part  244  by a bending adhesive member  266   a , the connector reinforcement piece  267  may be attached to the second bent part  246  by a connector adhesive member  267   a , and the support reinforcement piece  268  may be attached to the support part  250  of the base film  261  by a support adhesive member  268   a.    
     Each of the bending adhesive member  266   a , the connector adhesive member  267   a , and the support adhesive member  268   a  may also be made as a member having an adhesive on both sides, such as a double-sided tape. 
       FIG.  10    illustrates a top plan view showing a state in which the transparent electrode film  240  is coupled to the power reception means  220  and the detection sensor  234 , and  FIG.  11    illustrates a top plan view showing a state in which the transparent electrode film  240  is removed from the power reception means  220  and the detection sensor  234 . 
     As illustrated in these drawings, the power reception means  220  and the detection sensor  234  may respectively include hook connectors  270 , and the opposite ends of the transparent electrode film  240  may be respectively coupled to the hook connectors  270 . 
     Specifically, as illustrated in the drawing, the end of the first bent part  244  of the transparent electrode film  240  may be connected to the hook connector  270  of the power reception means  220 , and the end of the second bent part  246  of the transparent electrode film  240  may be connected to the hook connector  270  of the detection sensor  234 . 
       FIGS.  12  and  13    respectively illustrate partial sectional views showing states in which the end of the transparent electrode film  240  is inserted into and removed from the hook connector  270 . That is, in  FIGS.  12  and  13   , an example of the hook connector  270  is illustrated. 
     As illustrated in these drawings, the hook connector  270  may be provided with a hook to which the end of the transparent electrode film  240  is fitted and coupled. That is, the hook connector  270  may include a fixing hook  272 . 
     In addition, as illustrated in the drawings, such a fixing hook  272  may be provided with a pair of hook protrusions  272   a  which is provided vertically and can be in close contact with each other due to elasticity thereof. 
     The pair of hook protrusions  272   a  may be configured to have a shape vertically symmetrical to each other such that the hook protrusions are respectively inserted into the hook grooves  248  formed in the end of the transparent electrode film  240 . 
     In addition, the hook connector  270  may further include a hook cover  274  which forces the hook protrusions  272   a  of the fixing hook  272  to move. 
     The fixing hook  272  may be configured to be selectively pressed by rotating and opening/closing the hook cover  274  such that the hook protrusions  272   a  are inserted into or removed from the hook grooves  248  formed in the end of the transparent electrode film  240 . 
     Specifically, as illustrated in  FIG.  12   , when the hook cover  274  is closed, the hook protrusions  272   a  located at upper and lower sides may be close to each other by elastic force, and when the end of the transparent electrode film  240  is inserted into space between the pair of hook protrusions  272   a , the hook protrusions  272   a  may be inserted into the hook grooves  248  of the transparent electrode film  240 , and accordingly, the end of the transparent electrode film  240  may be coupled and fixed to the hook connector  270 . 
     Next, as illustrated in  FIG.  13   , when the hook cover  274  is counterclockwise (in  FIG.  13   ), the pair of hook protrusions  272   a  may respectively move upward and downward and thus a distance between the hook protrusions  272   a  may increase. 
     In this case, the hook protrusions  272   a  inserted into the hook grooves  248  of the transparent electrode film  240  may be removed from the hook grooves  248 , respectively, and thus the end of the transparent electrode film  240  may be removed from the hook connector  270 . 
     The scope of the present disclosure is not limited to the embodiment illustrated above, and within the technical scope as described above, many other modifications based on the present disclosure may be made by those skilled in the art.