Patent Publication Number: US-2022218118-A1

Title: Mattress care device

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application claims the priority benefit of Korean Patent Application No. 10-2021-0005139, filed on Jan. 14, 2021 in the Republic of Korea, which is hereby incorporated by reference in its entirety for all purposes as if fully set forth herein. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present disclosure relates generally to a new type mattress care device configured to be provided to a bed and to automatically perform sterilization of a mattress in the bed. 
     2. Description of the Background Art 
     In general, a mattress is used as a support for bedding on the floor or on a bed. 
     The mattress used for the bed is provided in a state of being placed on a bed frame, and a user can sleep by covering an upper surface of the mattress with bedding. 
     The above-mentioned mattress for a bed is provided in a state of being permanently provided in the bed frame. Therefore, continuous management for cleaning is required. 
     Conventionally, periodic washing of a mattress cover, dusting off dust accumulated on the mattress, and cleaning with a bedding vacuum are used as a method of cleaning the mattress, which is disclosed in Korean Patent No. 10-0661619, Korean Patent No. 10-0518620, etc. 
     The conventional cleaner described above is configured to perform sterilization cleaning using a sterilization lamp (e.g., an ultraviolet-C (UV-C) lamp). 
     However, in sterilization cleaning using the sterilization lamp, although the sterilization effect may be obtained only when the UV-C light source is radiated for a sufficient time, sufficient sterilization of the mattress may not be achieved as the user performed sterilization and cleaning at the same speed as during general vacuum cleaning. 
     Furthermore, as disclosed in related art, such as Korean Utility Model Registration No. 20-0388045, Korean Patent Application Publication No. 10-2009-0111632, Korean Patent No. 10-1767055, Korean Patent No. 10-1853624, Korean Patent Application Publication No. 10-2020-0067464, etc., sterilization cleaning for a mattress can be performed with a sterilization device, which has an UV-C lamp at a lower surface thereof and is provided at an upper portion of the mattress to be movable in forward and rearward directions (longitudinal direction of bed). 
     However, the user may feel discomfort while the sterilization device according to the above-described related art is provided in a structure of being exposed to the outside of the bed. Because the cleaner is present in the sleeping place, the user may feel (i.e., determine) that a smell (odor) is emitted in the bed even if the smell does not actually occur, and the feeling of the user causes the discomfort. 
     Furthermore, as the sterilization device is exposed to the outside of the bed, interference may occur when the user takes on and off the bed. 
     In addition, in the related art, the sterilization device is configured to be operated in a state of being provided on an outer surface of the bed frame or in a state of being provided by penetrating the bed frame. As an exposed portion or a penetration portion of the sterilization device is exposed outward, design aesthetics of the bed may deteriorate, and design improvement is difficult. 
     Furthermore, when the mattress is replaced with a different type of mattress, a distance between the conventional sterilization device and a surface of the new mattress is excessively increased or decreased, and the cleaning effect is reduced. 
     Specifically, considering that the irradiation distance of UV-C is affected by output and irradiation time, when the irradiation distance of UV-C is not constant, the sterilization effect is rapidly reduced. 
     The conventional sterilization device has the same length as the width of the mattress and is configured to clean while being moved only in the forward and rearward directions of the mattress, so that it is inevitable to use a motor with a large capacity so as to provide sufficient suction power. 
     Specifically, a lamp radiating UV-C also includes a plurality of lamps, so that overall manufacturing cost is inevitably high. 
     DOCUMENTS OF RELATED ART 
     
         
         (Patent Document 0001) Korean Patent No. 10-0661619. 
         (Patent Document 0002) Korean Patent No. 10-0518620. 
         (Patent Document 0003) Korean Patent No. 10-1767055. 
         (Patent Document 0004) Korean Patent No. 10-1853624. 
         (Patent Document 0005) Korean Patent Application Publication No. 10-2020-0067464. 
       
    
     SUMMARY OF THE INVENTION 
     Accordingly, the present disclosure has been made keeping in mind the above problems occurring in the related art, and the present disclosure is intended to provide a new type mattress care device configured to efficiently perform sterilization cleaning for a mattress and to be stored while being hidden from the outside in an unused state thereof. 
     Another objective of the present disclosure is intended to provide a new type mattress care device, which is configured to perform UV-C irradiation while being placed as close to a mattress as possible, resulting in a stable sterilization effect. However, any type of sterilizing irradiation may be used, such as Far-UV. 
     Further objective of the present disclosure is intended to provide a new type mattress care device, which is configured to perform efficient cleaning for an entire mattress only by a small suction force or a small UV-C irradiation area. 
     In order to achieve the above objectives, according to one aspect of the present disclosure, a mattress care device may be configured such that when cleaning for a mattress is performed, two vertically moving frames are moved upward from opposite side walls of a bed frame and then a sanitary module is moved along the vertically moving frames to clean the mattress. Therefore, when the mattress cleaning is not performed, the sanitary module may be stored in a location hidden from the view of a bed user. 
     According to the present disclosure, the mattress care device may include the bed frame having a mattress accommodation part storing the mattress and a storage part providing a storage space. 
     According to the mattress care device of the present disclosure, the storage part may include a storage groove formed on an upper surface of at least one of a front end or a rear end of the bed frame. 
     According to the mattress care device of the present disclosure, the vertically moving frames may be provided to be movable in vertical directions at opposite side walls of the bed frame. 
     According to the mattress care device of the present disclosure, the two vertically moving frames may have at least length reaching a front end to a rear end of the mattress. 
     The mattress care device of the present disclosure may include a sanitary module configured to clean the mattress. 
     According to the mattress care device of the present disclosure, the sanitary module may be configured such that opposite ends thereof are respectively connected to the two vertically moving frames to be movable in forward and rearward directions along the two vertically moving frames. 
     According to the mattress care device of the present disclosure, the sanitary module may be stored in the storage part of the bed frame when not in use. 
     According to the mattress care device of the present disclosure, the sanitary module may be configured to be movable in the forward and rearward directions by a moving part. 
     According to the mattress care device of the present disclosure, the sanitary module may be configured to be operated under control of a controller. 
     According to the mattress care device of the present disclosure, a through installation part having a vertical through hole may be provided at each corner of the bed frame. 
     According to the mattress care device of the present disclosure, vertical ends in the vertically moving frames may be formed by being bent downwardly from a front end and a rear end of each of the vertically moving frames to pass through the through hole of the through installation part. 
     The mattress care device of the present disclosure may include a frame elevation part operated under the control of the controller and configured to raise and lower the vertically moving frames. 
     According to the mattress care device of the present disclosure, the frame elevation part may be configured to raise the vertically moving frames when cleaning operation is performed, so that the sanitary module may be located higher than the upper surface of the mattress. 
     According to the mattress care device of the present disclosure, the frame elevation part may be configured to lower the vertically moving frames when the cleaning operation is not performed, so that the sanitary module may be located lower than the upper surface of the mattress. 
     According to the mattress care device of the present disclosure, the frame elevation part may include a ball screw (i.e., a first ball screw) coupled to an associated vertical end and an elevating motor provided for rotation driving of the ball screw. 
     According to the mattress care device of the present disclosure, the ball screw may be configured to be operated in conjunction with another ball screw (i.e., a second ball screw) by an interlocking device. 
     According to the mattress care device of the present disclosure, the storage part may include the storage groove formed by being depressed from an upper surface of at least one of the front end or the rear end of the bed frame. 
     According to the mattress care device of the present disclosure, the sanitary module may be configured to be inserted and stored in the storage groove. 
     According to the mattress care device of the present disclosure, the sanitary module may include a movable bar of which opposite ends are respectively connected to the two vertically moving frames and configured to be movable in the forward and rearward directions. 
     According to the mattress care device of the present disclosure, the sanitary module may include a sterilizing cleaner configured to be movable in leftward and rightward directions along a lower surface of the movable bar. 
     According to the mattress care device of the present disclosure, the left to right length of the sterilizing cleaner may be configured shorter than the left to right length of the movable bar. 
     According to the mattress care device of the present disclosure, an inlet may be provided on a bottom surface of the sanitary module, the sanitary module may include a fan motor and a dust collecting casing therein, the fan motor being configured to generate a vacuum suction force to the inlet, and the dust collecting casing being configured to collect debris contained in air suctioned through the inlet. 
     According to the mattress care device of the present disclosure, an UV-C irradiation part may be provided on the bottom surface of the sanitary module. 
     According to the mattress care device of the present disclosure, the moving part may include a rack gear provided on each of facing surfaces between the opposite vertically moving frames in a longitudinal direction of an associated vertically moving frame, and a pinion gear provided at each of opposite sides of the sanitary module. 
     According to the mattress care device of the present disclosure, a guide part may be provided on each of the facing surfaces between the vertically moving frames and be configured to guide movement of the sanitary module. 
     According to the mattress care device of the present disclosure, the guide part may be configured to protrude in an inward direction from each of the facing surfaces of the opposite vertically moving frames. 
     According to the mattress care device of the present disclosure, and each of the opposite ends of the sanitary module may be configured to be placed on the guide part. 
     As described above, the mattress care device of the present disclosure has following various effects. 
     The mattress care device of the present disclosure has the storage part in the bed frame to provide a storage space, so that the mattress care device cannot be exposed (i.e., is not exposed) to the outside when the sanitary module is not used. 
     The mattress care device of the present disclosure is configured to move the sanitary module in the vertical direction by the two vertically moving frames, so that the mattress care device can be stored while being hidden in an unused state and can be located while being exposed upward from the mattress during a use time. 
     The mattress care device of the present disclosure is configured to adjust the height of the sanitary module, so that UV-C irradiation can be performed while the sanitary module is placed as close to the mattress as possible and thus improve the sterilization effect. 
     The mattress care device of the present disclosure is configured to perform cleaning with the sanitary module moved forward and rearward on the upper surface of the mattress by the moving part, so that cleaning for the entire area of the mattress can be performed, even by a small suction force. 
     The mattress care device of the present disclosure is configured to provide the through installation part on each edge of the bed frame, so that the vertical ends located at the front end and the rear end of each of the vertically moving frames can be precisely moved upward and downward. 
     The mattress care device of the present disclosure has the frame elevation part to move the vertically moving frames upward and downward, so that the mattress care device can be automatically operated without manual operation. 
     The mattress care device of the present disclosure is configured such that the sanitary module is located higher than the upper surface of the mattress during operation of the frame elevation part and the sanitary module is located lower than the upper surface of the mattress during non-operation of the frame elevation part, so that the sanitary module can be prevented from being exposed to the outside during non-use. 
     The mattress care device of the present disclosure is configured to move the vertically moving frames upward and downward by the ball screw of the frame elevation part, so that the mattress care device can be used in common regardless of the height of the mattress (i.e., used for any mattress height). 
     The mattress care device of the present disclosure is configured to operate a first ball screw and a second ball screw in conjunction with each other by the interlocking device, so that the first and second ball screws can be operated collectively by the single elevating motor and tilting of the mattress care device occurring due to the difference in speeds by locations of the vertically moving frames can be prevented. 
     The mattress care device of the present disclosure is configured to store the sanitary module on the storage groove of the storage part, so that exposure of the sanitary module in an unused state can be minimized. 
     The mattress care device of the present disclosure is configured to move the movable bar of the sanitary module precisely forward and rearward along the two vertically moving frames, so that cleaning can be performed regardless of a longitudinal length of the mattress. 
     The mattress care device of the present disclosure is configured to move the sterilizing cleaner leftward and rightward along the lower surface of the movable bar, so that cleaning can be performed regardless of a transverse length of the mattress. 
     The mattress care device of the present disclosure has the sterilizing cleaner, which has the transverse length configured to be shorter than the transverse length of the movable bar and is moved leftward and rightward, so that cleaning for the mattress can be performed by stronger suction force. 
     The mattress care device of the present disclosure includes the sanitary module including the fan motor and the dust collecting casing to perform cleaning by suctioning and removing debris existing on the surface of the mattress. 
     The mattress care device of the present disclosure includes the UV-C irradiation part located on the bottom surface of the sanitary module to perform sterilization cleaning for the surface of the mattress. 
     The mattress care device of the present disclosure includes the moving part including the rack gear and the pinion gear to perform speed control for forward and rearward movement of the sanitary module. 
     The mattress care device of the present disclosure includes the guide part formed on the facing surfaces between the vertically moving frames, the pinion gear located on each of the opposite ends of the sanitary module can be precisely moved without separation from the rack gear. 
     The mattress care device of the present disclosure includes the sanitary module of which the opposite ends are respectively placed on the guide parts, so that the sanitary module can be moved without sagging of the opposite ends of the sanitary module. 
     The mattress care device of the present disclosure includes the storage part having the covering wall, so that an outward exposed portion of the sanitary module can be reduced in a stored state. 
     Further scope of applicability of the invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration only, since various changes and modifications within the scope of the invention will become apparent to those skilled in the art from this detailed description. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention. 
         FIG. 1  is a perspective view showing a bed with a mattress care device according to an embodiment of the present invention. 
         FIG. 2  is a sectional view showing an inside structure of the bed with the mattress care device according to an embodiment of the present invention. 
         FIG. 3  is a perspective view showing the installation of vertically moving frames of the mattress care device according to an embodiment of the present invention while a part of a bed frame is removed. 
         FIG. 4  is a perspective view showing the bed frame of the mattress care device according to an embodiment of the present invention. 
         FIG. 5  is a plan view showing the mattress care device according to an embodiment of the present invention. 
         FIG. 6  is a plan view showing a frame elevation part of the mattress care device according to an embodiment of the present invention. 
         FIG. 7  is an exploded-perspective view showing the installation of a sanitary module of the mattress care device according to an embodiment of the present invention. 
         FIG. 8  is an enlarged view showing part “A” of  FIG. 7 . 
         FIG. 9  is a plan view showing the installation of the sanitary module of the mattress care device according to an embodiment of the present invention. 
         FIG. 10  is a main part cut out perspective view showing the installation of a sterilizing cleaner of the sanitary module of the mattress care device according to an embodiment of the present invention. 
         FIG. 11  is a side sectional view showing an inside structure of the sterilizing cleaner of the sanitary module of the mattress care device according to an embodiment of the present invention. 
         FIG. 12  is a front sectional view showing the inside structure of the sterilizing cleaner of the sanitary module of the mattress care device according to an embodiment of the present invention. 
         FIG. 13  is a block diagram schematically showing a control structure performed by a controller of the mattress care device according to an embodiment of the present invention. 
         FIG. 14  is a stored state of the mattress care device according to an embodiment of the present invention. 
         FIG. 15  is a perspective view showing the stored state of the mattress care device according to an embodiment of the present disclosure while a part of the bed frame is removed. 
         FIG. 16  is a side sectional view showing a frame elevation part of the mattress care device according to an embodiment of the present invention. 
         FIG. 17  is a perspective view showing the vertically moving frames in a raised state for using the mattress care device according to an embodiment of the present invention. 
         FIG. 18  is a perspective view showing the vertically moving frames in the raised state of the mattress care device according to the embodiment of the present disclosure while a part of the bed frame is removed. 
         FIG. 19  is a side sectional view showing the vertically moving frames in the raised state for using the mattress care device according to an embodiment of the present invention. 
         FIG. 20  is a plan view showing a process of cleaning a mattress by the mattress care device according to an embodiment of the present invention. 
         FIG. 21  is a sectional view showing the inside of the sterilizing cleaner of the mattress care device according to an embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The present invention will now be described with reference to the accompanying drawings, wherein the same reference numerals have been used to identify the same or similar elements throughout the several views. 
     Hereinbelow, a mattress care device according to exemplary embodiments of the present disclosure will be described with reference to  FIGS. 1 to 21 . 
       FIG. 1  is a perspective view showing a bed with a mattress care device according to an embodiment of the present disclosure.  FIG. 2  is a sectional view showing an inside structure of the bed with the mattress care device according to the embodiment of the present disclosure. 
       FIG. 3  is a perspective view showing the installation of vertically moving frames of the mattress care device according to the present disclosure while a part of a bed frame is removed.  FIG. 4  is a perspective view showing the bed frame of the mattress care device according to the embodiment of the present disclosure.  FIG. 5  is a plan view showing the mattress care device according to the embodiment of the present disclosure. 
     As shown in the drawings, the mattress care device according to the embodiment of the present disclosure may be configured to be located lower than an upper surface of the mattress  10  and to be stored in a hidden state from the user&#39;s view when not in use, and the mattress care device may be configured to be located higher than the upper surface of the mattress  10  and to clean the upper surface of the mattress  10  when used. 
     When a sterilization cleaning is not performed, the mattress care device may be configured to prevent a sterilizing cleaner  320  from being exposed to the outside and to maintain the hidden state of the sterilizing cleaner  320  so as to prevent a user from feeling visual discomfort. 
     The mattress care device according to the embodiment of the present disclosure will be described as follows. 
     First, the mattress care device according to the embodiment of the present disclosure may include a bed frame  100 . 
     The bed frame  100  may be provided to form the exterior of the bed, and be configured to accommodate the mattress  10 . 
     The bed frame  100  may be formed in a box shape including a front wall  110  as the head portion of the bed, side walls  120  as the side portions of the bed, and a rear wall  130  as the foot portion of the bed and being open upward. 
     Furthermore, the bed frame  100  may include a storage part  140  (as shown in  FIG. 4 ). 
     The mattress  10  may be configured to be accommodated in a space from the head portion to the foot portion in the bed frame  100  (e.g., the front wall  110  to the rear wall  130 ). The storage part  140  may be provided in a space between the foot portion of the mattress  10  and the rear wall  130  of the bed frame  100  and a sanitary module  300 , which is described below, may be stored in the storage part  140 . 
     The storage part  140  may include a storage groove  141  formed by being depressed an upper surface of a rear end of the bed frame  100 . 
     The storage groove  141  may be formed on an upper surface of a front end of the bed frame  100 , or may be formed both the upper surfaces of the front and rear ends of the bed frame  100 . 
     Specifically, a cleaner accommodation groove  142  may be formed in the storage groove  141  of the storage part  140  to accommodate the sterilizing cleaner  320  of the sanitary module  300 . As the cleaner accommodation groove  142  is additionally provided, the sterilizing cleaner  320  may be stored in a regular location thereof. 
     In addition, a covering wall  143  may be provided in rear of the storage part  140 . When the sanitary module  300  is seated in the storage part  140 , the covering wall  143  may cover a rear edge of a movable bar  310  of the sanitary module  300 . 
     The covering wall  143  may be formed in a round shape, but may alternatively have any shape. 
     Furthermore, a through installation part  150  having a through hole  151  may be provided at each corner of the bed frame  100 . The through hole  151  may be formed by penetrating the through installation part  150  in a vertical direction. 
     The through installation part  150  may be formed of each corner of the bed frame  100 . Of course, the through installation part  150  may be provided separately from the bed frame  100  and may be securely coupled to each corner of the bed frame  100 . 
     Next, the mattress care device according to the embodiment of the present disclosure may include two vertically moving frames  200  (e.g., a first vertically moving frame  200  or a and a second vertically moving frame  200 ). The first and second vertically moving frames  200  may also be designated as first and second moving frames  200 . However, any number of vertically moving frames  200  may be used. 
     The two vertically moving frames  200  may be formed in a bar (i.e., formed of a bar) and may be formed longer than at least a longitudinal length of the mattress  10 . 
     In addition, the two vertically moving frames  200  may be provided to be movable upward and downward on the opposite walls of the bed frame  100 , which is transverse to a direction in which the mattress  10  extends. 
     Specifically, vertical ends  210  of the two vertically moving frames  200  may be provided in a front end and a rear end of each of the two vertically moving frames  200 . Each of the vertical ends may pass through the through hole  151  formed in the through installation part  150  of the bed frame  100  in the vertical direction. That is, each of the two vertical moving frames  200  has a center portion that extends substantially in a horizontal direction and two vertical ends (i.e., two ends extending in a vertical direction) extending downward in a substantially vertical direction, transverse to the horizontal direction, towards a frame elevation part  220 , which is described below. 
     The vertical ends  210  may be formed in a shape bent downward from opposite ends of each of the vertically moving frames  200 . The vertical ends  210  may be configured to be either coupled to the opposite ends of each vertically moving frame  200  or to form the ends of each vertically moving frame  200 . 
     Therefore, by the vertical ends  210 , the two vertically moving frames  200  may be moved upward or downward from the side walls  120  of the bed frame  100 . 
     The vertically moving frames  200  may be configured to be moved upward and downward by a manipulation of a user, or by automatic operation performed by control of a controller  500 . 
     According to the embodiment of the present disclosure, the vertically moving frames  200  may be configured to be moved upward and downward by a frame elevation part  220  (referring to  FIG. 3 ) under the control of the controller  500 . 
     Specifically, the frame elevation part  220  may be configured to raise the vertically moving frames  200  so as to locate the sanitary module  300  higher than the upper surface of the mattress  10  in an operative position, or to lower the vertically moving frames  200  so as to locate the sanitary module  300  lower than the upper surface of the mattress in a non-operative position. 
     In a cleaning operation, the frame elevation part  220  may be operated to locate the sanitary module  300  higher than the upper surface of the mattress  10 , and in a non-cleaning operation, the frame elevation part  220  may be operated to locate the sanitary module  300  lower than the upper surface of the mattress  10 . 
     The frame elevation part  220  may be configured to use a ball screw  221 . 
     Each of the vertical ends  210  may be provided to be moved upward and downward along a ball screw  221 . A lower end of the ball screw  221  may be provided to be exposed from a lower portion of the vertical end  210 , and the exposed portion of the ball screw  221  may be connected to an elevating motor  222  to be capable of power transmission. 
     Specifically, the ball screw  221  may be a first ball screw  221  and may connected to a second ball screw  221  by an interlocking device  223  (referring to  FIGS. 2 and 6 ) to be operated in conjunction with each other. When the single elevating motor  222  is driven, both the ball screws  221  may be rotated in the same direction by the interlocking device  223 . 
     The interlocking device  223  may be configured to use a gear, a chain, or a belt. 
     According to the embodiment of the present disclosure, the interlocking device  223  may be operated while using a power transmission structure of a bevel gear, as an example, or any type of gear. 
     For example, as shown in  FIGS. 2 and 6 , the ball screw  221  may include a first bevel gear  223   a  (e.g., ring gear) and at least one second bevel gear  223   b , the first bevel gear  223   a  engages the at least one second bevel gear  223   b  such that the first bevel gear  223   a  and the at least one second bevel gear  223   b  rotate together. The first bevel gear  223   a  may engage two separate second bevel gears  223   b  (e.g., pinion gear), and these two separate second bevel gears  223   b  may be provided at in directions perpendicular to each other, as shown in  FIG. 6 . 
     Two second bevel gears  223   b  located in facing locations may be connected to each other by a connection shaft  223   c . The second bevel gears  223   b  may be respectively provided at opposite ends of the connection shaft  223   c  and the second bevel gears  223   b  may be arranged to be engaged with first bevel gears  223   a  located in two distinct ball screws  221 . 
     One (driving-side connection shaft) of connection shafts  223   c  may be configured to receive a driving force while being connected to the elevating motor  222  with a first elevator motor gear  222   a  (e.g., a bevel gear or a belt) to be capable of power transmission. 
     When the elevating motor  222  is driven, the driving-side connection shaft  223   c  may be rotated to rotate the second bevel gears  223   b  at opposite ends of the connection shaft  223   c , whereby the two first bevel gears  223   a  engaged to the two second bevel gears  223   b  may be respectively rotated to rotate the two ball screws  221 . 
     In addition, when the two first bevel gears  223   a  are rotated, two other second bevel gears  223   b  engaged to the two first bevel gears  223   a  may be rotated to rotate two other first bevel gears  223   a , whereby other two ball screws  221  coupled to the two first bevel gears  223   a  may be rotated. That is, the mattress care device may include four total first bevel gears  223   a  and four total connection shafts  223   c , with each connection shaft  223   c  having two second bevel gears  223   b  at first and second ends thereof, and each first bevel gear  223   a  may engage two second bevel gears  223   b  of two different connection shafts  223   c , as shown in  FIG. 6 . Therefore, all of the first bevel gears  223   a  may be operatively connected together via corresponding second bevel gears  223   b , and one of the connection shafts  223   c  may be rotated by the elevating motor  222  via the first elevating motor gear  222   a.    
     Therefore, the four ball screws  221  may be rotated at the same time, and the vertically moving frames  200  coupled to the four ball screws  221  may be moved upward and downward from the bed frame  100 . 
     Next, the mattress care device according to the embodiment of the present disclosure may include the sanitary module  300 . 
     The sanitary module  300  is a device provided to clean the mattress  10 . 
     The sanitary module  300  may be configured to clean the upper surface of the mattress  10  while being moved along the vertically moving frames  200 . 
     Specifically, when not in use, the sanitary module  300  may be located to be stored in the storage part  140  of the bed frame  100  by the downward movement of the vertically moving frames  200 , and in the use time, the sanitary module  300  may be located above the mattress  10  out of the storage part  140  and be moved forward and downward. 
     The sanitary module  300  may include the movable bar  310  as shown in accompanying  FIGS. 5 and 6 . 
     The movable bar  310  may be provided to be movable forward and rearward in a longitudinal direction of the vertically moving frame  200  as opposite ends of the movable bar  310  are respectively connected to the two vertically moving frames  200 . The transverse length of the two vertically moving frames  200  may be formed longer than the left to right length of the mattress  10 . Further, the dimensions of the two vertically moving frames  200  may be larger than the dimensions of the mattress  10 , such that the two vertically moving frames  200  can move the sanitary module  300  over any portion of the mattress  10 . 
     Furthermore, the sanitary module  300  may include the sterilizing cleaner  320 . 
     As shown in  FIGS. 7 and 9 , the sterilizing cleaner  320  may be provided to be movable leftward and rightward along a lower surface of the movable bar  310  and be configured to clean a surface of the mattress  10 . 
     The sterilizing cleaner  320  may be provided to remove debris accumulated on a surface of the mattress  10 . That is, the sterilizing cleaner  320  may include at least a vacuum having a fan motor  322  and a dust collecting casing  323 , as described below. As shown in  FIGS. 10 and 11 , an inlet  321  (e.g., intake hole) may be formed on a bottom surface of the sterilizing cleaner  320 , and the sterilizing cleaner  320  may include a fan motor  322  and a dust collecting casing  323  therein. Further, the sterilizing cleaner  320  may further include a filter  303 , disposed downstream of the fan motor  322 , for filtering the air received from the fan motor  322 , and an outlet  304  (e.g., discharge hole). The fan motor  322  may provide a vacuum suction force to the inlet  321  and the dust collecting casing  323  may collect debris contained in air suctioned through the inlet  321 . 
     The transverse length of the sterilizing cleaner  320  may be configured to be shorter than the leftward and rightward length of the movable bar  310 . 
     Although not shown in the drawings, the inlet  321  is provided on the bottom surface of the movable bar  310  and the fan motor  322  and the dust collecting casing  323  are provided in the movable bar  310 , so that the movable bar  310  may be configured to replace the sterilizing cleaner  320 . 
     However, as the length of the inlet  321  provided in the movable bar  310  is formed longer, the suction force is lowered, so in order to increase the suction force, the size of the fan motor  322  should be increased or the fan motor  322  with more excellent performance should be used. Therefore, considering that manufacturing cost may be increase due to the above-mentioned configuration, it is preferable that an additional sterilizing cleaner  320  is provided. 
     Furthermore, the sterilizing cleaner  320  may include at least one UV-C irradiation part  324  radiating UV-C. UV-C radiated by the UV-C irradiation part  324  may sterilize the upper surface of the mattress  10 . 
     The UV-C irradiation part  324  may be provided at least one portion in the bottom surface of the sterilizing cleaner  320 . 
     In addition, the UV-C irradiation part  324  may consist of any one of an UV-C lamp and an UV-C LED. According to the embodiment of the present disclosure, the UV-C irradiation part  324  consists of the UV-C LED, as an example. 
     Furthermore, the sanitary module  300  may include a detection part  330  (referring to  FIG. 13 ) provided to determine a direction change location. 
     The detection part  330  may be configured to detect whether the sanitary module  300  reaches the front wall  110  or the rear wall  130  of the bed frame  100 . The detection part  330  may consist of at least one of a sensor and a switch. The controller  500  may control forward and rearward movement of the sanitary module  300  in response to the location information of the sanitary module  300  detected by the detection part  330 . 
     The detection part  330  may be provided in the bed frame  100 , (e.g., not in the sanitary module  300 ). 
     Meanwhile, the sterilizing cleaner  320  may be configured to be automatically moved along the movable bar  310  by the control of the controller  500 . 
     Therefore, according to the embodiment of the present disclosure, a rack gear  311  may be formed in a moving direction of the sterilizing cleaner  320  on the lower surface of the movable bar  310 , and a pinion gear  325  may be provided at the sterilizing cleaner  320  and be operated while being engaged with the rack gear  311 . The above-mentioned structure is the same as shown in  FIGS. 10 to 12 . 
     A cleaner moving motor  326  may be provided in the sterilizing cleaner  320  to drive the pinion gear  325 . The cleaner moving motor  326  may be configured to be controlled by the controller  500 . 
     The sterilizing cleaner  320  may be moved using an actuator or a linear motor, and may be formed with the ball screw structure. That is, the cleaner moving motor  326  may be an actuator or a linear motor formed with a ball screw structure. 
     The sterilizing cleaner  320  may be configured to be moved on the lower surface of the movable bar  310  while be supported by a guide rail  312 . 
     The guide rail  312  may be formed on any one of facing surfaces between the sterilizing cleaner  320  and the movable bar  310 . A guide groove  327  may be formed on another surface of the facing surfaces. 
     According to the embodiment of the present disclosure, as an example, the guide rail  312  may be formed by protruding from the lower surface of the movable bar  310 , and the guide groove  327  may be formed by being depressed on an upper surface of the sterilizing cleaner  320 . The guide rail  312  may have an outwardly flared shape (e.g., a triangular shape) with the rack gear  311  being disposed at a center (e.g., cross-sectional center) of the guide rail  312 . Further, the guide groove  327  (i.e., female member) may have a shape corresponding to that of the guide rail  312  (i.e., male member), such that the guide rail  312  fits into the guide groove  327 , to permit the pinion gear  325  to engage the rack gear  311 . 
     Furthermore, the sanitary module  300  may be configured to be moved along the vertically moving frames  200  while being supported by being supported by guide parts  230  ( FIG. 3 ). 
     The guide parts  230  may be provided to inwardly protrude from the facing surfaces between the two vertically moving frames  200 . The opposite ends of the movable bar  310  of the sanitary module  300  may be configured to be respectively placed on the guide parts  230 . 
     Next, the mattress care device according to the embodiment of the present disclosure may include a moving part  400 . 
     The moving part  400  may be configured to move the sanitary module  300  forward and rearward. 
     The moving part  400  may include a rack gear  410  and a pinion gear  420 , as shown in  FIG. 9 . 
     The rack gear  410  may be formed on each of the facing surfaces between the two vertically moving frames  200  in a longitudinal direction of the vertically moving frame  200 . The pinion gear  420  may be provided at each of the opposite ends of the movable bar  310  of the sanitary module  300  to be engaged with the rack gear  410 . 
     The pinion gear  420  may be rotated by receiving a driving force of a module moving motor  430 . The pinion gear  420  may be moved along the rack gear  410 . 
     Specifically, the module moving motor  430  may be located in the movable bar  310 , and may be directly connected to the pinion gear  420  or be provided to be capable of power transmission by a belt or a chain. 
     Next, the mattress care device according to the embodiment of the present disclosure may include the controller  500 . 
     As shown in  FIG. 13 , the controller  500  may be configured to control operation of the vertically moving frames  200  and operation of the sanitary module  300 . 
     The controller  500  may be configured to control each of the elevating motor  222  for operating the vertically moving frames  200 , the module moving motor  430  for operating the sanitary module  300 , and the cleaner moving motor  326  for operating the sterilizing cleaner  320 . 
     The controller  500  may include an operation part  510  for manual operation. The operation part  510  may be provided at the bed frame  100  or at the sanitary module  300 . 
     Preferably, the operation part  510  may be provided at one portion on an exterior surface of the bed frame  100 , and the controller  500  may be provided at the bed frame  100  or the sanitary module  300 . 
     The controller  500  may be controlled by a mobile terminal of a user, home network system, or other online controlling. 
     Specifically, the controller  500  may be controlled such that a movement speed of the sterilizing cleaner  320  is changed in response to operation of the UV-C irradiation part  324 . 
     When the UV-C irradiation part  324  is operated to irradiate UV-C, the sterilizing cleaner  320  or the movable bar  310  is controlled to be moved at a moving speed lower than a moving speed of the UV-C irradiation part  324  in non-radiating state. Therefore, UV-C is sufficiently radiated on the mattress  10  to provide the sterilization effect. When only the suction cleaning is performed without the sterilization cleaning, cleaning time may be reduced. 
     Furthermore, when the controller  500  receives a sensing signal (or, switch signal) from the detection part  330 , the controller  500  may control to stop the forward and rearward movement of the sanitary module  300  or to move the sanitary module  300  rearward. 
     Hereinbelow, a cleaning process of the mattress  10  performed using the above-mentioned mattress care device of the present disclosure will be described in detail. 
     First, when cleaning for the mattress  10  is not performed, the vertically moving frames  200  are maintained while being placed on upper surfaces of the side walls  120  of the bed frame  100 . 
     The movable bar  310  of the sanitary module  300  may be maintained while being placed on the storage groove  141  formed in the storage part  140  of the bed frame  100 . The sterilizing cleaner  320  of the sanitary module  300  may be stored while being accommodated in the cleaner accommodation groove  142  formed in the storage part  140 . 
     The upper surface of the sterilizing cleaner  320  may be stored in the cleaner accommodation groove  142  while being hidden by the movable bar  310 . Therefore, the sterilizing cleaner  320  may be prevented from being exposed outward, thus visual discomfort of the user may be prevented. The above-mentioned structure is the same as shown in  FIGS. 14 to 16 . 
     When a preset cleaning cycle in an initial state arrives or a manipulation of the user via the operation part  510  is generated and a cleaning command is performed, the controller  500  may control operation of the frame elevation part  220  and upward movement of the vertically moving frames  200 . 
     As the elevating motor  222  of the frame elevation part  220  is driven, the ball screw  221  located at each corner of the bed frame  100  is rotated, whereby the vertical ends  210  coupled to the ball screw  221  may be moved upward to move the two vertically moving frames  200  upward. 
     In addition, when the two vertically moving frames  200  are moved upward, the sanitary module  300  may also be moved upward together with the two vertically moving frames  200  and be separated from the storage part  140 . The above-mentioned structure is the same as shown in  FIGS. 17 to 19 . 
     The upward movement of the two vertically moving frames  200  is performed until the bottom of the sterilizing cleaner  320  is located higher than the upper surface of the mattress  10 . The distance of the upward movement of the vertically moving frames  200  may be preset by the user in advance or be checked in real time using a sensor (e.g., encoder, etc.). 
     When the two vertically moving frames  200  are fully raised by the above process, as the cleaner moving motor  326  and the module moving motor  430  are driven by control of the controller  500 , the movable bar  310  and the sterilizing cleaner  320  of the sanitary module  300  may be moved. 
     The controller  500  may controls the movable bar  310  of the sanitary module  300  to be located at the rear (i.e., foot side) or the front (i.e., head side) of the bed frame  100 , and control the sterilizing cleaner  320  to be located at one side of the movable bar  310 . The location of the movable bar  310  and the sterilizing cleaner  320  may be an initial location (i.e., preset location) that is preset to automatically perform cleaning. 
     When the sanitary module  300  is returned to the preset location, the controller  500  may control the module moving motor  430  of the moving part  400  to be operated and the movable bar  310  to be moved forward. 
     Furthermore, in the forward movement of the movable bar  310 , the controller  500  may control the fan motor  322  of the sterilizing cleaner  320  to be operated together. 
     Therefore, debris existing on the upper surface of the mattress  10  may be suctioned into the sterilizing cleaner  320  and collected in the dust collecting casing  323 . 
     In addition, the controller  500  may control the sterilizing cleaner  320  to be moved in a longitudinal direction of the movable bar  310  by operating the cleaner moving motor  326  of the sterilizing cleaner  320  in the forward movement of the movable bar  310 , as shown in  FIG. 20 . 
     Therefore, the sterilizing cleaner  320  may suction debris, via the fan motor  322  and the dust collection casing  323 , on the upper surface of the mattress  10  while being supported by the guide rail  312  and moved from one side of the movable bar  310  to another side thereof. 
     The sterilizing cleaner  320  may be operated to be moved when the movable bar  310  completely performs forward movement or rearward movement. The movement distance of the sterilizing cleaner  320  may be moved by a distance considering the suction force of the sterilizing cleaner  320 . The movement of the movable bar  310  and the movement of the sterilizing cleaner  320  may be performed in order, thus cleaning for the entire area of the mattress  10  may be uniformly performed. 
     Both the transverse movement of the sterilizing cleaner  320  and the longitudinal movement of the movable bar  310  may be controlled to be operated at the same time. Then, considering moving paths of the sterilizing cleaner  320  and the movable bar  310 , the controller may control each speed of the sterilizing cleaner  320  and the movable bar  310  or be control forward and rearward movements of the movable bar  310  to be repeated. 
     The controller  500  controls a moving direction of the movable bar  310  to be changed on the basis of the sensing information of the detection part  330 . 
     Meanwhile, during the cleaning for the mattress  10  as described above, the UV-C irradiation part  324  of the sterilizing cleaner  320  may be operated by a presetting or manipulation of the user. 
     Of course, the controller may control the UV-C irradiation part  324  to be separately operated without double operation with the fan motor  322 , and to be operated only in the forward movement or the rearward movement of the sterilizing cleaner  320 . 
     As described above, when the UV-C irradiation part  324  is operated, UV-C may be radiated to the mattress  10  and harmful insects, viruses and/or bacteria in the mattress  10  may be removed or destroyed (i.e., eradicated). 
     Specifically, when the UV-C irradiation part  324  of the sterilizing cleaner  320  is operated, the controller may control the sterilizing cleaner  320  to be moved slower than when only the fan motor  322  is operated. In the operation of the UV-C irradiation part  324 , as the sterilizing cleaner  320  is controlled to be moved slower, the sterilization effect using UV-C may be sufficiently secured (i.e., the sterilization effect may be improved or be more effective). 
     Meanwhile, when the cleaning of the mattress  10  as described above is complete, the sanitary module  300  may be returned to the location where the storage part  140  is located. 
     When the sanitary module  300  is returned to the preset location, the elevating motor  222  of the frame elevation part  220  may be driven to reverse-rotate the ball screw  221  located at each corner of the bed frame  100 . 
     Therefore, the vertical end  210  coupled to the ball screw  221  may be moved downward, the two vertically moving frames  200  may be moved downward, the movable bar  310  of the sanitary module  300  may be placed within the storage groove  141  of the storage part  140 , and the sterilizing cleaner  320  of the sanitary module  300  may be accommodated in the cleaner accommodation groove  142 . 
     Therefore, the sterilizing cleaner  320  stored in the storage part  140  may not be exposed to the outside of the bed and be stored in a state of being hidden from view. 
     The mattress care device of the present disclosure may be configured to automatically perform the sterilization cleaning and the vacuum cleaning of the mattress  10 , whereby continuous management of the mattress  10  may be performed. 
     Furthermore, the mattress care device of the present disclosure may include the sterilizing cleaner  320  of the sanitary module  300  stored in the storage part  140  without exposure to the outside when the cleaning of the mattress  10  is not performed, so that the user cannot feel discomfort. 
     Furthermore, the mattress care device of the present disclosure may include the vertically moving frames  200  located at the opposite sides of the mattress  10  and a portion of the vertically moving frames  200  having the rack gear  410  of the moving part  400  is stored without exposure to the outside, so that contamination or discomfort caused by exposure of the portion may be prevented. 
     Furthermore, the mattress care device of the present disclosure may be configured to form the moving structure of the vertically moving frames  200  using the ball screws  221 , so that the height of the vertically moving frames  200  may be adjusted and thus the mattress care device may be used in common regardless of the thickness of the mattress  10 . 
     Meanwhile, it may not be limited that the mattress care device of the present disclosure is embodied only into the above-described structure. 
     For example, the mattress care device of the present disclosure may include a vibration part  328  in the sterilizing cleaner  320 , as shown in  FIG. 21 . As the vibration part  328  is additionally provided, a surface of the mattress  10  where the sterilizing cleaner  320  passes may be hit, and debris on the surface of the mattress  10 , such as dust, may be easily fallen and suctioned. 
     The vibration part  328  may include a vibration source  328   a , such as an ultrasonic vibrator or a vibration motor, and a vibration plate  328   b  vibrated vertically by operation of the vibration source  328   a , as shown in  FIG. 21 . 
     The two vertically moving frames  200  of the mattress care device of the present disclosure may not be located at the opposite side walls of the bed frame  100 , and may be located at locations where the front wall  110  and the rear wall  130  of the bed frame  100  are located. 
     Then, the movable bar  310  of the sanitary module  300  may be arranged in the longitudinal direction (front to rear direction) of the mattress  10  and may be configured to be moved in the transverse direction (left to right direction) of the mattress  10 , and the storage part  140  may be provided on any one of the opposite side walls  120  of the bed frame  100 . 
     As described above, the mattress care device of the present disclosure may be embodied in various shapes. 
     The present invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.