Patent Publication Number: US-2023132625-A1

Title: Electrostatic cleaning device

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application claims priority under 35 U.S.C. § 119(a) to Korean patent application number 10-2021-0149903, filed on Nov. 3, 2021 and Korean patent application number 10-2022-0047636, filed on Apr. 18, 2022, in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. 
     BACKGROUND 
     1. Technical Field 
     The present disclosure generally relates to an electrostatic cleaning device, and more particularly, to an electrostatic cleaning device capable of increasing the cleaning area as well as increasing the length of a belt that delivers an electrostatic charge (negative charge) to an electrified body, by configuring a static electricity generator in a donut-shape, and improving a user&#39;s convenience, by configuring the donut-shaped static electricity generator for the user to be able to assemble cleaning tools for various purposes, increasing electrostatic force in proportion to an increased surface area of the electrified body part even if the length of an electrostatic induction belt for delivering the electrostatic charge (negative charge) to the electrified body part is relatively short, by configuring the surface area of the electrified body part that collects the electrostatic charge (negative charge) in the static electricity generator to be as wide as possible in a limited space, and reducing power consumption as well as reducing noise, by configuring to supply power in a pulse cycle. 
     2. Related Art 
     In general, a cleaner includes various cleaners such as a vacuum cleaner that collects foreign substances such as dust by using a suction power generated by driving a motor with electricity, a non-motorized cleaner that attaches a rotary brush to a roller and rotates the rotary brush to sweep the dust, an electrostatic cleaner that inductively charges the charging plate of the positive electrode and the charging plate of the negative electrode to generate static electricity and then collects foreign substances, and a cleaner using static electricity which use static electricity generated by the plastic paper attached to the belt rubbing against the static electricity generator when the front and rear rollers rotate to clean. 
     Among these, vacuum cleaners have the advantage of good dust suction and fast cleaning speed, but generate a lot of noise during operation, and small foreign substances such as fine dust are spread again in the air, which is not suitable for simple cleaning. 
     Accordingly, a cleaner using static electricity is being actively researched and developed as a cleaner which generates less noise, is simple to prepare, and can clean even fine dust. 
     In other words, as a cleaner that uses static electricity, from a cleaner that uses static electricity generated by rubbing a cleaning cloth with a floor to a cleaner that uses static electricity generated by continuous friction of the plastic paper attached to the belt with the static electricity generating member when the front and rear rollers rotate is being researched and developed. 
     In such an electrostatic cleaner, since the static electricity generation force determines a cleaning ability, research on an electrostatic cleaner capable of maximizing the static electricity generation force has recently been conducted. 
     SUMMARY 
     The present disclosure has been made in an effort to solve the issues of the related art as described above. Embodiments provide an electrostatic cleaning device capable of maximizing static electricity generation force in a limited space by increasing the length of a belt that delivers an electrostatic charge (negative charge) to an electrified body, by configuring the static electricity generator that generates static electricity using the principle of the van der Graf generator in a donut-shape. 
     In addition, embodiments provide an electrostatic cleaning device capable of improving user convenience by configuring cleaning tools for various purposes to be assembled in a donut-shaped static electricity generator. 
     In addition, embodiments provide an electrostatic cleaning device capable of increasing the electrostatic force in proportion to the increased surface area of the electrified body part even if the length of the electrostatic induction belt for delivering the electrostatic charge (negative charge) to the electrified body part is relatively short, by configuring the surface area of the electrified body part that collects electrostatic charge (negative charge) in the static electricity generator that generates static electricity using the principle of the van der Graf generator to be as wide as possible in a limited space, and reducing power consumption as well as reducing noise, by configuring to supply power in a pulse cycle. 
     In accordance with an aspect of the present disclosure, there is provided an electrostatic cleaning device including: a static electricity generator configured to generate static electricity; a handle part connected to one side of the static electricity generator; and a cleaning tool adapted to be assembled to and disassembled from the static electricity generator, wherein the static electricity generator includes a first electrified body part configured as a donut-shaped case and configured to deliver a negative charge to the cleaning tool; a belt rotatably installed in an inner space of the first electrified body part and configured to transfer the negative charge; and a second electrified body part configured to supply the negative charge to the belt. 
     Specifically, the static electricity generator may further include first conductor parts respectively installed on outer surfaces of both sides of the first electrified body part and configured to deliver the negative charge transferred through the belt to the first electrified body part; and a second conductor part configured to deliver the negative charge of the second electrified body part to the belt. 
     Specifically, the belt may be rotated by a roller part installed in the inner space of the donut-shaped first electrified body part. The roller part may include one drive roller and a plurality of moving rollers, the drive roller may be connected to a motor and rotated by a driving force of the motor to transmit its rotational force to the belt, and each of the plurality of moving rollers may be installed on a bent portion caused by the first electrified body part forming the donut shape and rotates to guide the belt. 
     Specifically, each of the first conductor parts may include an outer plate exposed to the outer surface of each of the both sides of the first electrified body part; a fixed plate integrally formed with the outer plate and fixed to the first electrified body part; and a protrusion piece connected to the fixed plate and protruding so as to be adjacent to the belt. 
     Specifically, the static electricity generator may further include attachment parts respectively installed on inner surfaces of both sides of the first electrified body part and configured to attach the cleaning tool, and each of the attachment part may include a fixed plate fixed to the first electrified body part; and a velcro adhered to the fixed plate and exposed to the inner surface of each of the both sides of the first electrified body part, and configured to attach the cleaning tool. 
     Specifically, the cleaning tool may be fixed by being attached at both ends to the velcro after wrapping the first electrified body part. 
     Specifically, the cleaning tool may be a floor push stick head, and the floor push stick head may include a base in the form of a flat plate to which a cleaning cloth is attached, the base being in contact with a lower surface of the first electrified body part to transfer a negative charge charged to the first electrified body part to the cleaning cloth; a pair of first coupling parts provided on an upper portion of the base at an interval corresponding to a width of the first electrified body part, the pair of first coupling parts being in close contact with the outer surfaces of the both sides of the first electrified body part; a second coupling part provided as a protruding structure on the upper portion of the base and in close contact with inner surfaces of both sides of the first electrified body part in a state of being inserted into a hole formed by the first electrified body part being provided in the donut-shape; and auxiliary attachment parts provided on upper edges of both sides of the base and attaching both ends of the cleaning cloth to fix the cleaning cloth to the base. 
     Specifically, each of the first coupling part may be formed of a conductor, and be in contact and connected with the first conductor part exposed to the outer surface of each of the both sides of the first electrified body part to deliver the negative charge transferred through the belt to the base. 
     Specifically, the cleaning tool may be a brush head, and the brush head may include a base in the form of a flat plate to which a dust brush is attached, the base being in contact with a lower surface of the first electrified body part to transfer the negative charge charged to the first electrified body part to the dust brush; a pair of first coupling parts provided on an upper portion of the base at an interval corresponding to a width of the first electrified body part, the pair of first coupling parts being in close contact with the outer surfaces of the both sides of the first electrified body part; and a second coupling part provided as a protruding structure on the upper portion of the base and in close contact with inner surfaces of both sides of the first electrified body part in a state of being inserted into a hole formed by the first electrified body part being provided in the donut-shape. 
     Specifically, each of the first coupling part may be formed of a conductor, and be in contact and connected with the first conductor part exposed to the outer surface of each of the both sides of the first electrified body part to deliver the negative charge transferred through the belt to the base. 
     In accordance with another aspect of the present disclosure, there is provided an electrostatic cleaning device including: a static electricity generator connected to a cover part provided with a handle to generate static electricity and deliver it to a cleaning tool; and a button part configured to operate the static electricity generator. The static electricity generator includes a first electrified body part forming a main body sealed by the cover part and configured to deliver a negative charge to the cleaning tool; an electrostatic induction belt rotatably installed in an inner space of the first electrified body part to transfer the negative charge; and a second electrified body part configured to supply the negative charge to the electrostatic induction belt, and the first electrified body part includes an auxiliary electrified body including a plurality of rib assemblies in the inner space so as to increase a total surface area to increase a maximum saturation point of electrostatic force. 
     Specifically, the first electrified body part may include an edge electrified body forming an edge of the main body and configured to collect a negative charge to remove foreign substances floating from a floor; and a bottom electrified body forming a bottom of the main body, connected to the auxiliary electrified body, and configured to collect a negative charge to remove foreign substances from the floor. 
     Specifically, the bottom electrified body may have a double structure in which an inner surface is formed of a un-electrified body material and an outer surface is formed of an electrified body material. 
     Specifically, the auxiliary electrified body may be installed on the inner surface of the bottom electrified body, and installed so as to be connected to the electrified body material forming the outer surface of the bottom electrified body. 
     Specifically, the auxiliary electrified body may be assembled or integrally formed so as to be connected to the electrified body material forming the outer surface of the bottom electrified body. 
     Specifically, the static electricity generator may further include a first conductor part configured to deliver the negative charge transferred through the electrostatic induction belt to the first electrified body part; and a second conductor part configured to deliver the negative charge of the second electrified body part to the electrostatic induction belt. 
     Specifically, the first conductor part may include a collecting plate having one side installed adjacent to the electrostatic induction belt and forming a peak shape of a lightning rod structure or a sawtooth shape to collect the negative charge from the electrostatic induction belt; and a delivering plate having one side connected to the other side of the collecting plate and the other side being installed to be adjacent to the edge electrified body of the first electrified body part, extending long in a longitudinal direction of the edge electrified body to deliver the negative charge to the first electrified body part, and forming a peak shape of a lightning rod structure or a sawtooth shape. 
     Specifically, the static electricity generator may further include a coupling part provided in the form of a groove on a front portion of the first electrified body part in a longitudinal direction intersecting a cleaning direction, and the coupling part may be provided to detachably attach a scraper configured to remove foreign substances from a cleaning target (cloth, bedding, carpet) requiring physical scraping. 
     Specifically, the button part may include a power button, and when the power button is pressed while power is off, the power may be turned on and electric power may be supplied in a pulse cycle. 
     Specifically, when the power button is pressed while the power is off, the electrostatic cleaning device may repeat maintaining an on state for an initial first time to operate a motor configured to rotate the electrostatic induction belt, then maintaining an off state for a second time to stop the operation of the motor, and maintaining the on state for a third time to operate the motor. 
     Specifically, the button part may include a ground button used to remove foreign substances from the electrostatic cleaning device, and when the ground button is pressed, polarity (negative charge) generated while the electrostatic induction belt is rotated by the motor may be momentarily dissipated and electrostatic force may be lowered so as to remove foreign substances. 
     Specifically, the first electrified body part may be formed using conductive plastic as an electrified body material. 
     An electrostatic cleaning device according to example embodiments is capable of maximizing static electricity generation force in a limited space by increasing the length of a belt that delivers an electrostatic charge (negative charge) to an electrified body, by configuring a static electricity generator that generates static electricity using the principle of the van der Graf generator in a donut-shape. 
     In addition, the electrostatic cleaning device according to example embodiments is configured such that cleaning tools for various purposes may be assembled in the donut-shaped static electricity generator, thereby improving a user&#39;s convenience by increasing the user&#39;s cleaning options. 
     In addition, in the electrostatic cleaning device according to example embodiments, the static electricity generator has the donut-shape and a small amount of vortex is generated by a hole formed in the center when dust is removed from the air, thereby increasing a cleaning ability. 
     In addition, the electrostatic cleaning device according to example embodiments is capable of increasing the electrostatic force in proportion to the increased surface area of the electrified body part even if the length of an electrostatic induction belt for delivering the electrostatic charge (negative charge) to the electrified body part is relatively short, by configuring the surface area of the electrified body part that collects the electrostatic charge (negative charge) in the static electricity generator that generates static electricity using the principle of the van der Graf generator to be as wide as possible in a limited space, thereby maximizing a cleaning efficiency. 
     In addition, the electrostatic cleaning device according to example embodiments is configured to supply power in a pulse cycle, so as to reduce power consumption of a battery thereby maximizing use time, and intermittently stop operation of a motor to reduce noise, thereby increasing the user&#39;s convenience and satisfaction. 
     In addition, the electrostatic cleaning device according to example embodiments is configured such that a scraper is detachably attached to the electrified body part and thus it is possible to easily remove foreign substances such as dust even from a cleaning target (bedding, carpets, etc.) requiring physical scraping, thereby broadening the user&#39;s cleaning options. 
     In addition, in the electrostatic cleaning device according to example embodiments, by providing a ground button on a button part, it is possible to easily drop foreign substances such as dust from the cleaner, thereby increasing the user&#39;s convenience and satisfaction. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Example embodiments will now be described more fully hereinafter with reference to the accompanying drawings; however, they may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the example embodiments to those skilled in the art. 
       In the drawing figures, dimensions may be exaggerated for clarity of illustration. It will be understood that when an element is referred to as being “between” two elements, it can be the only element between the two elements, or one or more intervening elements may also be present. Like reference numerals refer to like elements throughout. 
         FIG.  1    is an exploded perspective view illustrating an electrostatic cleaning device in accordance with a first embodiment of the present disclosure. 
         FIG.  2    is a partially assembled perspective view of the electrostatic cleaning device in accordance with the first embodiment of the present disclosure. 
         FIG.  3    is an assembled perspective view illustrating the electrostatic cleaning device in accordance with the first embodiment of the present disclosure. 
         FIG.  4    is a diagram illustrating an internal configuration of the electrostatic cleaning device in accordance with the first embodiment of the present disclosure. 
         FIG.  5    is a front view illustrating a first conductor part and an attachment part of the electrostatic cleaning device in accordance with the first embodiment of the present disclosure. 
         FIG.  6    is an enlarged perspective view illustrating a second conductor part of the electrostatic cleaning device in accordance with the first embodiment of the present disclosure. 
         FIG.  7    is a diagram illustrating a cleaning tool of the electrostatic cleaning device in accordance with the first embodiment of the present disclosure. 
         FIG.  8    is a diagram illustrating another cleaning tool of the electrostatic cleaning device in accordance with the first embodiment of the present disclosure. 
         FIG.  9    is a diagram illustrating another cleaning tool of the electrostatic cleaning device in accordance with the first embodiment of the present disclosure. 
         FIG.  10    is a perspective view illustrating an electrostatic cleaning device in accordance with a second embodiment of the present disclosure. 
         FIG.  11    is an exploded perspective view illustrating the electrostatic cleaning device in accordance with the second embodiment of the present disclosure. 
         FIG.  12    and  FIG.  13    are partially assembled perspective views illustrating the electrostatic cleaning device in accordance with the second embodiment of the present disclosure. 
         FIG.  14    is an enlarged view illustrating a first conductor part of the electrostatic cleaning device in accordance with the second embodiment of the present disclosure. 
         FIG.  15 A  is a graph illustrating a change in electrostatic voltage according to an area size of an electrostatic induction belt. 
         FIG.  15 B  is a graph illustrating a change in electrostatic voltage according to an area size of an electrified body part. 
         FIG.  16 A  is a graph illustrating a change in electrostatic voltage when power is supplied in a fixed period. 
         FIG.  16 B  is a graph illustrating a change in electrostatic voltage when power is supplied in a pulse cycle. 
     
    
    
     DETAILED DESCRIPTION 
     The objects, specific advantages, and novel features of the present disclosure will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In the present specification, in adding reference numbers to the components of each drawing, it should be noted that only the same components are given the same number as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. 
     Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 
       FIG.  1    is an exploded perspective view illustrating an electrostatic cleaning device in accordance with a first embodiment of the present disclosure,  FIG.  2    is a partially assembled perspective view illustrating the electrostatic cleaning device in accordance with the first embodiment of the present disclosure,  FIG.  3    is an assembled perspective view illustrating the electrostatic cleaning device in accordance with the first embodiment of the present disclosure,  FIG.  4    is a diagram illustrating an internal configuration of the electrostatic cleaning device in accordance with the first embodiment of the present disclosure,  FIG.  5    is a front view illustrating a first conductor part and an attachment part of the electrostatic cleaning device in accordance with the first embodiment of the present disclosure, and  FIG.  6    is an enlarged perspective view illustrating a second conductor part of the electrostatic cleaning device in accordance with the first embodiment of the present disclosure. 
       FIG.  7    is a diagram illustrating a cleaning tool of the electrostatic cleaning device in accordance with the first embodiment of the present disclosure,  FIG.  8    is a diagram illustrating another cleaning tool of the electrostatic cleaning device in accordance with the first embodiment of the present disclosure, and  FIG.  9    is a diagram illustrating another cleaning tool of the electrostatic cleaning device in accordance with the first embodiment of the present disclosure. 
     Referring to  FIG.  1    to  FIG.  6   , an electrostatic cleaning device  1   a  according to the first embodiment of the present disclosure may include a static electricity generator  2   a , a handle part  3   a , a power button part  4   a , a motor  5   a , and a battery  6   a.    
     The static electricity generator  2   a  may generate static electricity to remove foreign substances such as dust and hair with static electricity, and may include a first electrified body part  21   a , a second electrified body part  22   a , a belt  23   a , a roller part  24   a , a first conductor part  25   a , a second conductor part  26   a , and an attachment part  27   a.    
     In this embodiment, the static electricity generator  2   a  uses the principle of the Van de Graaff Generatora as a basic principle for generating static electricity, but is not limited thereto, and since the principle of the Van der Graaff generator is a known technology, a detailed description thereof will be omitted herein. 
     The first electrified body part  21   a  is a portion that receives a negative charge transferred through the belt  23   a  from the first conductor part  25   a  and generates static electricity, which may be formed in a donut-shaped case, and may be referred to as a main body connected to the handle part  3   a  in the electrostatic cleaning device  1   a.    
     In the present embodiment, the electrified body part  21   a  having a rectangular donut-shape extending forward with respect to the handle part  3   a  is described as an example, but the present invention is not limited thereto. 
     As the first electrified body part  21   a  forms a donut-shape, a hole  28   a  may be formed in the central portion. 
     This hole  28   a , as will be described later, may have a function of assembling and fixing a cleaning tool  7   a.    
     The first electrified body part  21   a  may include an upper electrified body  211   a  and a lower electrified body  212   a  that may be assembled and disassembled. The upper and lower electrified bodies  211  and  212   a  may be configured such that a second electrified body part  22   a , a belt  23   a , a roller part  24   a , a first conductor part  25   a , a second conductor part  26   a , and an attachment part  27   a  may be installed thereon. 
     The second electrified body part  22   a  may supply a negative charge to the belt  23   a.    
     Specifically, the second electrified body part  22   a  may be installed in the handle part  3   a  to be spaced apart from the first electrified body part  21   a  by a predetermined interval, and may be configured to deliver the negative charge to the second conductor part  26   a . Due to this, the second electrified body part  22   a  makes it possible to supply the negative charge to the belt  23   a  through the second conductor part  26   a.    
     The second electrified body part  22   a  may be formed to have a polarity opposite to that of the first electrified body part  21   a , wherein in this embodiment, the first electrified body part  21   a  may have a negative polarity, and the second electrified body part  22   a  may have a positive polarity. 
     The belt  23   a  may be formed between the first electrified body part  21   a  and the second electrified body part  22   a.    
     The belt  23   a  may be rotatably installed in the inner space of the donut-shaped first electrified body part  21   a.    
     The belt  23   a  may be installed on a drive roller  241   a  and a plurality of moving rollers  242   a  installed in the inner space of the donut-shaped first electrified body part  21   a , and may be rotated by the rotational force of the drive roller  241   a.    
     This belt  23   a  may transfer the negative charge, and deliver the negative charge to the first electrified body part  21   a  through the first conductor part  25   a.    
     In the present embodiment, the belt  23   a  has the first electrified body part  21   a  in a donut shape, so that the length may be maximized in a limited space, thereby maximizing the static electricity generation force. 
     In other words, the static electricity generation force is proportional to the amount of charge q1, q2 by the formula of F=K[q1×q2]/D2, and since the charge is distributed on the surface in proportion to the cross-sectional area of the material, the greater the length or width of the belt  23   a , the greater the amount of charge. Therefore, in the case of the present invention, the length of the belt  23   a  may be made as long as possible under a limited space, thereby maximizing the static electricity generation force. 
     The roller part  24   a  is installed in the inner space of the donut-shaped first electrified body part  21   a  so that the belt  23   a  may rotate in the inner space of the first electrified body part  21   a , and may include one drive roller  241   a  and a plurality of moving rollers  242   a.    
     The drive roller  241   a  may be connected to the motor  5   a  and rotated by the driving force of the motor  5   a , and may transmit the rotational force to the belt  23   a.    
     The plurality of moving rollers  242   a  may be installed one at a time on a bent portion caused by the first electrified body part  21   a  forming a donut-shape to guide the rotating belt  23   a . In this embodiment, since the first electrified body part  21   a  forms a rectangular donut-shape, moving rollers  242   a  may be installed at each square corner portion. 
     The first conductor part  25   a  may be installed on an outer surface of each of both sides of the first electrified body part  21   a , and may deliver the negative charge transferred through the belt  23   a  to the first electrified body part  21   a.    
     This first conductor part  25   a  may include an outer plate  251   a  exposed to the outer surface of each of the both sides of the first electrified body part  21   a , a fixed plate  252   a  formed integrally with the outer plate  251   a  and fixed to the first electrified body part  21   a , and a protrusion piece  253   a  connected to the fixed plate  252   a  and protruding so as to be adjacent to the belt  23   a.    
     The negative charge of the belt  23   a  may be delivered to the first conductor part  25   a  through the protrusion piece  253   a , in other words, the protrusion piece  253   a  serves as a bridge for delivering the negative charge. 
     The first conductor part  25   a  is connected to the power button part  4   a , and when the power is turned OFF by the operation of the power button part  4   a , static electricity may be removed. 
     The second conductor part  26   a  may deliver the negative charge of the second electrified body part  22   a  to the belt  23   a.    
     The second conductor part  26   a  may be connected to the roller shaft  2411   a  of the roller part  24   a , but is not limited thereto. 
     The second conductor part  26   a  is connected to the power button part  4   a , and when the power is turned OFF by the operation of the power button part  4   a , static electricity may be removed. 
     The attachment parts  27   a  may be installed on an inner surface of each of both sides of the first electrified body part  21   a , and a cleaning tool  7   a  to be described later may be attached thereto. 
     The attachment part  27   a  may include a fixed plate  271   a  fixed to the first electrified body part  21   a , and a velcro  272   a  that is adhered to the fixed plate  271   a  and exposed to an inner surface of each of the both sides of the first electrified body part  21   a.    
     As shown in  FIG.  7   , when the cleaning tool  7   a  is the cleaning cloth  71   a , both ends of the cleaning cloth  71   a  may be attached to the velcro  272   a  and thus the velcro  272   a  may fix the cleaning cloth  71   a  to the first electrified body part  21   a.    
     In addition, as shown in  FIGS.  8  and  9   , when the cleaning tool  7   a  is the floor push stick head  72   a  or the brush head  73   a , the velcro  272   a  serves to hold the second coupling parts  723  and  733   a  inserted into the hole  28   a  to prevent the floor push stick head  72   a  or the brush head  73   a  from being separated. 
     The handle part  3   a  may be connected to one side of the first electrified body part  21   a  forming the main body. 
     The handle part  3   a  may be formed in a shape and size that is easy for a user to grip by hand, and may be configured such that the second conductor part  26   a , the power button part  4   a , the motor  5   a , and the battery  6   a  may be installed. 
     The power button part  4   a  may operate the static electricity generator  2   a.    
     The power button part  4   a  may be provided between the motor  5   a  and the battery  6   a , and may transmit power from the battery  6   a  to the motor  5   a  to drive the motor  5   a.    
     The power button part  4   a  may be operated to rotate the motor  5   a  in a forward or reverse direction. 
     For example, the power button part  4   a  may be configured to turn on (ON) the power and rotate the motor  5   a  in the forward direction when pressed while the power is off (OFF), turn off the power when briefly pressed while the power is on, and rotate the motor  5   a  which is rotating in the forward direction in the reverse direction when pressed and held while the power is on, but is not limited thereto. 
     Configuring the power button part  4   a  to rotate the motor  5   a  in the forward or reverse direction as such, makes it possible to instantaneously switch the polarity (negative charge) generated when the motor  5   a  rotates in the forward direction to the opposite polarity (positive charge) when rotating in the reverse direction, and at this time, a neutral point may be created according to the reverse driving time, so that electrostatic force may be removed, and the cleaning tool  7   a  may be separated without static electricity. 
     The motor  5   a  may be installed inside the handle part  3   a.    
     The motor  5   a  may receive power from the battery  6   a  by the operation of the power button part  4   a  to rotate the moving roller  242   a , and may be protected by the motor case  51   a.    
     The battery  6   a  may be installed inside the handle part  3   a.    
     The battery  6   a  may be charged by applying a general smartphone charging terminal, and may be replaced by the battery cover  61   a.    
     The electrostatic cleaning device  1   a  according to the first embodiment of the present disclosure may further include a cleaning tool  7   a.    
     The cleaning tool  7   a  may be assembled to and disassembled from the first electrified body part  21   a  of the static electricity generator  2   a , and may be configured to clean using the negative charge charged to the first electrified body part  21   a.    
     The cleaning tool  7   a  may be a cleaning cloth  71   a , as shown in  FIG.  7   . 
     The cleaning cloth  71   a  may be fixed by being attached at both ends to the velcro  272   a  of the attachment part  27   a  after wrapping the first electrified body part  21   a , and may remove foreign substances such as dust or hairs in the air with the negative charge transferred from the first electrified body part  21   a.    
     Also, the cleaning tool  7   a  may be a floor push stick head  72   a , as shown in  FIG.  8   . 
     The floor push stick head  72   a  may be used to remove foreign substances from the floor, and may include a base  721   a , a first coupling part  722   a , a second coupling part  723   a , and an auxiliary attachment part  724   a.    
     The base  721   a  may have a flat plate shape so as to be in close contact with the floor, and a cleaning cloth  71   a  may be attached thereto. 
     The base  721   a  may have an upper surface in contact with a lower surface of the first electrified body part  21   a  to transfer the negative charge charged in the first electrified body part  21   a  to the cleaning cloth  71   a.    
     A pair of the first coupling parts  722   a  may be provided on an upper portion of the base portion  721   a . The pair of first coupling parts  722   a  may be provided to face each other at a distance corresponding to the width of the first electrified body part  21   a.    
     The first coupling parts  722   a  may be in close contact with the outer surfaces of both sides of the first electrified body part  21   a  to fix the floor push stick head  72   a.    
     In addition, the first coupling part  722   a  may be formed of a conductor, and accordingly, may be in contact and connected with the first conductor part  25   a  exposed to the outer surface of each of the both sides of the first electrified body part  21   a  to directly deliver the negative charge transferred through the belt  23   a  to the base  721   a.    
     The second coupling part  723   a  may be provided as a protruding structure on the upper portion of the base  721   a . The protruding structure of the second coupling part  723   a  may have a size corresponding to the size of the hole  28   a  formed in the central portion of the first electrified body part  21   a , and may be in close contact with inner surfaces of both sides of the first electrified body part  21   a  in a state of being inserted into the hole  28   a  to fix the floor push stick head  72   a  together with the first coupling part  722   a.    
     The auxiliary attachment part  724   a  may be provided on an edge of each of both upper sides of the base  721   a.    
     The auxiliary attachment part  724   a  may be a velcro, and both ends of the cleaning cloth  71   a  may be attached to fix the cleaning cloth  71   a  to the base  721   a.    
     Also, the cleaning tool  7   a  may be a brush head  73   a , as shown in  FIG.  9   . 
     The brush head  73   a  may be used to remove foreign substances from furniture, and may include a base  731   a , a first coupling part  732   a , a second coupling part  733   a , and a dust brush  734   a.    
     The base  731   a  may have a flat plate shape so as to be in close contact with the floor, and the dust brush  734   a  may be attached to the lower surface thereof. 
     The base  731   a  may have an upper surface in contact with the lower surface of the first electrified body part  21   a  to transfer the negative charge charged in the first electrified body part  21   a  to the dust brush  734   a.    
     A pair of the first coupling parts  732   a  may be provided on the upper portion of the base  731   a . The pair of first coupling parts  732   a  may be provided to face each other at a distance corresponding to the width of the first electrified body part  21   a.    
     The first coupling parts  732   a  may be in close contact with outer surfaces of both sides of the first electrified body part  21   a  to fix the brush head  73   a.    
     In addition, the first coupling part  732   a  may be formed of a conductor, and accordingly, may be in contact and connected with the first conductor part  25   a  exposed to the outer surface of each of the both sides of the first electrified body part  21   a  to directly deliver the negative charge transferred through the belt  23   a  to the base  731   a.    
     The second coupling part  733   a  may be provided as a protruding structure on the upper portion of the base portion  731   a . The protruding structure of the second coupling part  733   a  may have a size corresponding to the size of the hole  28   a  formed in the central portion of the first electrified body part  21   a , and may be in close contact with inner surfaces of both sides of the first electrified body part  21   a  in a state inserted into the hole  28   a  to fix the brush head  73   a  together with the first coupling part  732   a.    
     The electrostatic cleaning device  1   a  according to the present invention configured as described above is configured so that the cleaning tools  7   a  for various purposes may be assembled on the donut-shaped static electricity generatort  2   a , thereby broadening the user&#39;s cleaning options, and increasing the user&#39;s convenience and satisfaction. 
     In addition, in the electrostatic cleaning device  1   a  according to the present invention, since the static electricity generator  2   a  forms a donut-shape, a small amount of vortex is generated by the hole  28   a  formed in the center when dust in the air is removed, thereby improving the cleaning ability. 
       FIG.  10    is a perspective view illustrating an electrostatic cleaning device in accordance with a second embodiment of the present disclosure,  FIG.  11    is an exploded perspective view illustrating the electrostatic cleaning device in accordance with the second embodiment of the present disclosure,  FIG.  12    and  FIG.  13    are partially assembled perspective views illustrating the electrostatic cleaning device in accordance with the second embodiment of the present disclosure, and  FIG.  14    is an enlarged view illustrating a first conductor part of the electrostatic cleaning device in accordance with the second embodiment of the present disclosure. 
     In addition,  FIG.  15 A  is a graph illustrating a change in electrostatic voltage according to an area size of an electrostatic induction belt,  FIG.  15 B  illustrates a graph showing a change in electrostatic voltage according to an area size of an electrified body part,  FIG.  16 A  is a graph illustrating a change in electrostatic voltage when power is supplied in a fixed period, and  FIG.  16 B  is a graph illustrating a change in electrostatic voltage when power is supplied in a pulse cycle. 
     Referring to  FIGS.  10  to  14   , an electrostatic cleaning device  1   b  according to the second embodiment of the present disclosure may include a static electricity generator  2   b , a handle  3   b , a button part  4   b , a motor  5   b , a battery  6   b , a circuit board  7   b , a cover part  8   b , and a scraper  9   b.    
     The static electricity generator  2   b  is connected to the cover part  8   b  provided with the handle  3   b , and may be configured to generate static electricity and deliver it to a cleaning tool (not shown) such as a cleaning cloth to remove foreign substances such as dust and hair with static electricity The static electricity generator  2   b  may include a first electrified body part  21   b , a second electrified body part  22   b , an electrostatic induction belt  23   b , a roller part  24   b , a first conductor part  25   b , and a second conductor part  26   b , and a coupling part  27   b.    
     In this embodiment, the static electricity generator  2   b  uses the principle of the Van de Graaff Generatora as a basic principle for generating static electricity, but is not limited thereto, and since the principle of the Van der Graaff generator is a known technology, a detailed description thereof will be omitted herein. 
     The first electrified body part  21   b  is a portion in which static electricity is generated by receiving the negative charge transferred through the electrostatic induction belt  23   b  from the first conductor part  25   b , and may have a box shape with an open upper portion, and may be referred to as a main body in which the open upper portion is sealed by the cover part  8   b.    
     The first electrified body part  21   b  may be formed of an electrified body material that collects the negative charge and can remove foreign substances such as dust, and may include an edge electrified body  211   b , a bottom electrified body  212   b , and an auxiliary electrified body  213   b.    
     The first electrified body part  21   b  may be formed using conductive plastic (e.g., LUCON CP6062) as an electrified body material. If conductive plastic is used, it does not need to be replaced even if worn out due to friction caused by repeated use, improving durability issue and reducing costs compared to using conventional plating materials. 
     In the present embodiment, although it is described that the first electrified body part  21   b  is formed of conductive plastic, it is of course not limited thereto and may be formed of an electrified body material such as plating or a metal plate. 
     The edge electrified body  211   b  may collect a negative charge while forming the edge of the main body, and may be formed in a size corresponding to the edge of the cover part  8   b . The upper open portion of the edge electrified body  211   b  may be coupled to the cover part  8   b . The edge electrified body  211   b  may remove foreign substances floating on the floor during cleaning. 
     The bottom electrified body  212   b  may collect a negative charge while forming the bottom of the main body, and may be installed in the lower open portion of the edge electrified body  211   b . The bottom electrified body  212   b  may remove foreign substances present on the floor during cleaning. 
     On the inner surface of the bottom electrified body  212   b , an installation space in which other components, such as a second electrified body part  22   b , an electrostatic induction belt  23   b , a roller part  24   b , a first conductor part  25   b , a second conductor part  26   b , a motor  5   b , a battery  6   b , and a circuit board  7   b  are installed may be provided. These other components are described below by limiting installation positions such as one side and/or the other side of the inner surface of the bottom electrified body  212   b , but are not limited thereto, and may be arranged differently in terms of space utilization. 
     The bottom electrified body  212   b  may have a double structure in which an inner surface is formed of an un-electrified body material and an outer surface is formed of an electrified body material. This is because other components installed on the inner surface of the bottom electrified body  212   b  must be prevented from being affected by static electricity. However, in addition to the other components on the inner surface of the bottom electrified body  212   b , the auxiliary electrified body  213   b  is also installed, and the portion where the auxiliary electrified body  213   b  is installed should be configured such that the electrified body material forming the outer surface is exposed. 
     The auxiliary electrified body  213   b  is installed in the inner space of the first electrified body part  21   b  to increase the total surface area of the first electrified body part  21   b  to increase the maximum saturation point of the electrostatic force. The auxiliary electrified body  213   b  may be composed of a plurality of rib assemblies on the inner surface of the bottom electrified body  212   b  so as to increase the total surface area of the first electrified body  21   b  in addition to the surface area of the edge electrified body  211   b  and the surface area of the bottom electrified body  212   b , wherein the auxiliary electrified body  213   b  may be installed so as to be connected to the electrified body material forming the outer surface of the bottom electrified body  212   b.    
     The auxiliary electrified body  213   b  may be installed in any space except for the free space of the bottom electrified body  212   b , that is, the installation space in which the above-described other components are installed. 
     The auxiliary electrified body  213   b  may be assembled or integrally formed so as to be connected to the electrified body material forming the outer surface of the bottom electrified body  212   b.    
     This auxiliary electrified body  213   b , unlike the edge electrified body  211   b  and the bottom electrified body  212   b , does not directly participate in the removal of foreign substances, but can increase the total surface area of the first electrified body part  21   b , which makes it possible to increase the electrostatic force of the first electrified body part  21   b  as a result. 
     In general, the electrostatic force is affected by the area of the electrostatic induction belt  23   b  and the area of the first electrified body  21   b , which will be described later, and as shown in  FIG.  15 A , it can be seen that as the area of the electrostatic induction belt  23   b  increases, the time for the electrostatic force (electrostatic voltage) to reach the maximum saturation point is shortened and the time to maintain the maximum saturation point is increased, and as shown in  FIG.  15 B , it can be seen that the maximum saturation point of the electrostatic force increases as the area of the first electrified body part  21   b  increases. 
     As described above, in this embodiment, by installing the auxiliary electrified body  213   b , the surface area may be increased in a limited space, and the electrostatic force of the first electrified body part  21   b  may be maximized while maintaining the shape of the compact electrostatic cleaning device  1   b  as it is. 
     The second electrified body part  22   b  may supply a negative charge to the electrostatic induction belt  23   b  through the second conductor part  26   b , and may be installed on one side of the inner surface of the bottom electrified body  212   b.    
     The second electrified body part  22   b  may be formed to have a polarity opposite to that of the first electrified body part  21   b , and in this embodiment, the first electrified body part  21   b  may have a negative polarity, and the second electrified body part  22   b  may have a positive polarity. 
     The electrostatic induction belt  23   b  may be rotatably installed in the inner space of the first electrified body part  21   b . The electrostatic induction belt  23   b  may be installed in a longitudinal direction on the inner surface of the bottom electrified body  212   b  so as to secure the maximum area even though the space is limited. 
     The electrostatic induction belt  23   b  may be installed between the first conductor part  25   b  installed on the other side of the inner surface of the bottom electrified body  212   b  and the second conductor part  26   b  installed on one side of the inner surface of the bottom electrified body  212   b , and may deliver the negative charge supplied through the second conductor part  26   b  to the first conductor part  25   b . The electrostatic induction belt  23   b  may be connected to a drive roller  241   b  installed on one side of the inner surface of the bottom electrified body  212   b  and a moving roller  242   b  installed on the other side of the inner surface of the bottom electrified body  212   b  to be rotated by the rotational force of the drive roller  241   b.    
     Such an electrostatic induction belt  23   b  may transfer the negative charge, and may deliver the negative charge to the first electrified body part  21   b  through the first conductor part  25   b.    
     The roller part  24   b  may be installed on the inner surface of the bottom electrified body  212   b , and may include a drive roller  241   b  and a moving roller  242   b.    
     The drive roller  241   b  may be installed on one side of the inner surface of the bottom electrified body  212   b . The drive roller  241   b  may be connected to the motor  5   b  and rotated by the driving force of the motor  5   b , and may transmit the rotational force to the electrostatic induction belt  23   b.    
     The moving roller  242   b  may be installed on the other side of the inner surface of the bottom electrified body  212   b , and one or more may be installed. 
     In the above, the drive roller  241   b  and the moving roller  242   b  may be formed of a material having a negative charge, such as Teflon (Polytetrafluoroethylene, PTFE). 
     The first conductor part  25   b  may be installed on the other side of the inner surface of the bottom electrified body  212   b , and may deliver the negative charge transferred through the electrostatic induction belt  23   b  to the first electrified body part  21   b.    
     The first conductor part  25   b  may include a collecting plate  251   b  that collects the negative charge transferred from the electrostatic induction belt  23   b , and a delivering plate  252   b  that delivers the collected negative charge to the first electrified body part  21   b.    
     The collecting plate  251   b  is installed so that one side is adjacent to the electrostatic induction belt  23   b , and may form a peak shape of a lightning rod structure or a sawtooth shape to easily collect the negative charge from the electrostatic induction belt  23   b . The other side of the collecting plate  251   b  may be connected to the delivering plate  252   b.    
     The delivering plate  252   b  may be installed such that one side is connected to the other side of the collecting plate  251   b  and the other side is adjacent to the edge electrified body  211   b  of the first electrified body part  21   b.    
     The other side of the delivering plate  252   b  extends long in the longitudinal direction of the edge electrified body  211   b  to easily deliver the negative charge to the first electrified body part  21   b , and may form a peak shape of a lightning rod structure or sawtooth shape. 
     The first conductor part  25   b  may be connected to the button part  4   b  and remove static electricity when the power is turned off (OFF) by manipulating the button part  4   b.    
     The second conductor part  26   b  may deliver the negative charge of the second electrified body part  22   b  to the electrostatic induction belt  23   b.    
     The second conductor part  26   b  may be installed so that one side is adjacent to the electrostatic induction belt  23   b , and may form a peak shape of a lightning rod structure or a sawtooth shape to easily deliver the negative charge to the electrostatic induction belt  23   b . The other side of the second conductor part  26   b  may be connected to the second electrified body part  22   b.    
     The second conductor part  26   b  may be connected to the button part  4   b  and remove static electricity when the power is turned off (OFF) by manipulating the button part  4   b.    
     The coupling part  27   b  may be provided so that the scraper  9   b  may be detachably attached to the first electrified body part  21   b . The coupling part  27   b  may be provided in the form of a groove on the front portion of the first electrified body part  21   b  in a longitudinal direction crossing the cleaning direction. 
     The scraper  9   b  is detachable from the coupling part  27   b  and may be configured to easily remove foreign substances such as dust from a cleaning target (bedding, carpets, etc.) requiring physical scraping. 
     Experimental results showed that the electrostatic force was selectively expressed according to types of dust and the properties of the floor (cloth, bedding, PVC, wood, flooring, PE, etc.). For example, while foreign substances (dust, hair, other animal hair, etc.) that were well charged with a positive charge were removed very effectively without the scraper  9   b  attached when the floor was PVC, PP, or corrugated flooring, which was easily negatively charged, they could not be effectively removed without the scraper  9   b  attached from cloths, bedding, carpets, etc., where the floor had a positive charge, and in the state in which the scraper  9   b  was attached, the scraper  9   b  physically separated foreign substances in close contact with cloth, bedding, carpet, and the like, so that they could be effectively removed. 
     The electrostatic cleaning device  1   b  of the present embodiment is configured to attach and detach the scraper  9   b  and thus may be used for multiple purposes such as cleaning a general floor basically by attaching a cleaning tool such as a cleaning cloth and cleaning the cleaning target requiring physical scraping by attaching the scraper  9   b  without the cleaning cloth. 
     The handle  3   b  may be connected to the cover part  8   b , and may be formed in a shape and size that is easy for a user to grip by hand. 
     The button part  4   b  may include a power button, and may operate the static electricity generator  2   b.    
     The button part  4   b  may be provided on the circuit board  7   b , and may drive the motor  5   b  by transmitting power from the battery  6   b  to the motor  5   b.    
     In addition, when the power button is pressed while the power is off (OFF), the button part  4   b  allows power to be supplied in a pulse cycle while the power is turned on (ON). 
     Generally, as shown in  FIG.  16 A , the conventional electrostatic cleaner is configured so that when the power button is pressed to turn the power from the off state to the on state, power is supplied at a fixed period to continuously operate the motor, and stop the operation of the motor when the power button is pressed once more to turn to the off state, and as the motor continues to operate until the cleaning is complete, the power consumption stored in the battery is inevitably increased and noise is inevitably generated continuously. 
     On the other hand, as shown in  FIG.  16 B , the electrostatic cleaning device  1   b  of this embodiment is configured so that when the power button of the button part  4   b  is pressed while the power is off, the electrostatic cleaning device repeats maintaining an on state for an initial first time to operate the motor, then maintaining an off state for a second time to stop the operation of the motor  5   b , and maintaining the on state for a third time to operate the motor until cleaning is finished (the user presses the power button once more to turn the power off completely). 
     In the above, the first time may be at least the time until the electrostatic power (electrostatic voltage) reaches the maximum saturation point, and the second time may be the time until the electrostatic power falls to a preset value by natural discharge after the power is turned off using the principle that natural discharge takes a long time, and the third time may be a time until the electrostatic power which has fallen to a preset value reaches a maximum saturation point. Since the first time has to reach the maximum saturation point in a state in which the electrostatic power is zero, the first time may be relatively longer than the third time to reach the maximum saturation point from the electrostatic power that has dropped to a preset value. In the case of the second time, the length may vary according to the natural discharge time and a preset value. 
     As described above, when power is supplied in a pulse cycle by the button part  4   b , the electrostatic power is maintained similar to that continuously supplied, so that the motor  5   b  is intermittently stopped without affecting the cleaning using static electricity to reduce power consumption stored in the battery  6   b  as well as reduce noise. 
     Also, the button part  4   b  may include a ground button. The ground button of the button part  4   b  is used to remove dust from the electrostatic cleaning device  1   b , and when the ground button is pressed, the polarity (negative charge) generated while the electrostatic induction belt  23   b  is rotated by the motor  5   b  is momentarily dissipated, the electrostatic power is lowered, so that foreign substances such as dust may be easily removed from the electrostatic cleaning device  1   b.    
     As such, in this embodiment, by providing the ground button on the button part  4   b , the electrostatic power generated during cleaning takes a long time to naturally discharge even after the power button of the button part  4   b  is turned off, so as to solve the problem that it is difficult to easily remove foreign substances from the electrostatic cleaning device  1   b.    
     In addition, the button part  4   b  may be operated to rotate the motor  5   b  in the forward or reverse direction with the power button. 
     For example, the button part  4   b  may be configured to turn on (ON) the power and rotate the motor  5   b  in the forward direction when pressed while the power is off (OFF), turn off the power when briefly pressed while the power is on, and rotate the motor  5   b  which is rotating in the forward direction in the reverse direction when pressed and held while the power is on, but is not limited thereto. 
     Configuring the button part  4   b  to rotate the motor  5   b  in the forward or reverse direction as such, makes it possible to instantaneously switch the polarity (negative charge) generated when the motor  5   b  rotates in the forward direction to the opposite polarity (positive charge) when rotating in the reverse direction, and at this time, a neutral point may be created according to the reverse driving time, so that electrostatic force may be removed, and the cleaning tool  7   b  may be separated without static electricity. 
     The motor  5   b  may be installed on one side of the inner surface of the bottom electrified body  212   b.    
     The motor  5   b  may receive power from the battery  6   b  by the operation of the button part  4   b  to rotate the moving roller  242   b , and may be protected with a motor case  82   b  provided inside the cover part  8   b.    
     The battery  6   b  may be installed on the other side of the inner surface of the bottom electrified body  212   b.    
     The battery  6   b  may be charged by applying a general smartphone charging terminal, and may be protected by a battery case  82   b  provided inside the cover part  8   b.    
     The circuit board  7   b  may be installed between the motor  5   b  and the battery  6   b  on the inner surface of the bottom electrified body  212   b , and may be designed to implement various functions in the electrostatic cleaning device  1   b.    
     The cover part  8   b  may seal the open upper portion of the first electrified body part  21   b.    
     On the outer surface of the cover part  8   b , a handle  3   b  may be connected thereto, and a plurality of attachment parts  81   b  to which various cleaning tools (not shown) such as a cleaning cloth may be attached may be provided. 
     A motor case  82   b  accommodating the motor  5   b  and a battery case  83   b  accommodating the battery  6   b  may be provided on the inner surface of the cover part  8   b.    
     The electrostatic cleaning device  1   b  according to the present invention configured as described above is capable of increasing the electrostatic force in proportion to the increased surface area of the electrified body part  21   b  even if the length of the electrostatic induction belt  23   b  for delivering the electrostatic charge (negative charge) to the electrified body part  21   b  is relatively short, by configuring the surface area of the electrified body part  21   b  that collects electrostatic charge (negative charge) in the static electricity generator  2   b  that generates static electricity using the principle of the van der Graf generator to be as wide as possible in a limited space, thereby maximizing the cleaning efficiency. 
     In addition, in the electrostatic cleaning device  1   b  according to the present invention, by configuring to supply power in a pulse cycle, the power consumption of the battery  6   b  may be reduced to maximize the use time, and the operation of the motor  5   b  may be intermittently stopped to reduce noise, thereby increasing user convenience and satisfaction. 
     In addition, in the electrostatic cleaning device  1   b  according to the present invention, by configuring the scraper  9   b  to be detachably attached to the electrified body part  21   b , foreign substances such as dust may be easily removed from the cleaning target that requires physical scraping (bedding, carpet, etc.), thereby broadening the user&#39;s cleaning options. 
     In addition, in the electrostatic cleaning device  1   b  according to the present invention, by providing a ground button on the button part  4   b , foreign substances such as dust may be easily removed from the cleaner, thereby increasing user convenience and satisfaction. 
     While the present disclosure has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-described exemplary embodiments but should be determined by not only the appended claims but also the equivalents thereof. 
     In the above-described embodiments, all steps may be selectively performed or part of the steps and may be omitted. In each embodiment, the steps are not necessarily performed in accordance with the described order and may be rearranged. The embodiments disclosed in this specification and drawings are only examples to facilitate an understanding of the present disclosure, and the present disclosure is not limited thereto. That is, it should be apparent to those skilled in the art that various modifications can be made on the basis of the technological scope of the present disclosure. 
     Meanwhile, the exemplary embodiments of the present disclosure have been described in the drawings and specification. Although specific terminologies are used here, those are only to explain the embodiments of the present disclosure. Therefore, the present disclosure is not restricted to the above-described embodiments and many variations are possible within the spirit and scope of the present disclosure. It should be apparent to those skilled in the art that various modifications can be made on the basis of the technological scope of the present disclosure in addition to the embodiments disclosed herein. 
     EXPLANATION OF SYMBOLS 
     
         
         
           
               1   a : Electrostatic cleaning device  2   a : Static electricity generator 
               21   a : First electrified body part  211   a : Upper electrified body 
               212   a : Lower electrified body  22   a : Second electrified body part 
               23   a : Belt  24   a : Roller part 
               241   a : Drive roller  2411   a : Roller shaft 
               242   a : Moving roller  25   a : First conductor part 
               251   a : Outer plate  252   a : Fixed plate 
               253   a : Protrusion piece  26   a : Second conductor part 
               27   a : Attachment part  271   a : Fixed plate 
               272   a : Velcro  28   a : Hole 
               3   a : Handle part  4   a : Power button part 
               5   a : Motor  51   a : Motor case 
               6   a : Battery  61   a : Battery cover 
               7   a : Cleaning tool  71   a : Cleaning cloth 
               72   a : Floor push stick head  721   a : Base 
               722   a : First coupling part  723   a : Second coupling part 
               724   a : Auxiliary attachment part  73   a : Brush head 
               731   a : Base  732   a : First coupling part 
               733   a : Second coupling part  734   a : Dust brush 
               1   b : Electrostatic cleaning device  2   b : Static electricity generator 
               21   b : First electrified body part  211   b : Edge electrified body 
               212   b : Bottom electrified body  213   b : Auxiliary electrified body 
               22   b : Second electrified body part  23   b : Electrostatic induction belt 
               24   b : Roller part  241   b : Drive roller 
               242   b : Moving roller  25   b : First conductor part 
               251   b : Collecting plate  252   b : Delivering plate 
               26   b : Second conductor part  27   b : Coupling part 
               3   b : Handle  4   b : Button part 
               5   b : Motor  6   b : Battery 
               7   b : Circuit board  8   b : Cover part 
               81   b : Attachment part  82   b : Motor case 
               83   b : Battery case  9   b : Scraper