Patent Publication Number: US-2022218114-A1

Title: Mattress care device

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application claims the priority benefit of Korean Patent Application No. 10-2021-0005135, 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 to a new type of mattress care device that facilitates automatic mattress sterilization while being provided in a bed. 
     2. Description of the Background Art 
     In general, a mattress is used as a base for bedclothes, and is used on the floor or as a bed. 
     In the case of a mattress used as a bed, it is provided on a bed frame, and the bedclothes are additionally laid or covered on top of the mattress for a person to sleep. 
     In the case of the above-mentioned mattress for a bed, continuous management for cleanliness is required because the mattress is provided in a state that is always installed on the bed frame. 
     Conventionally, a sterilizer having a UV-C lamp on the bottom is provided, with which automatic sterilization and cleaning of a mattress is possible by installing it to be movable in the front-back direction (longitudinal direction of the bed) on the upper side of the mattress. 
     In this regard, as disclosed in Korean Utility Model Registration No. 20-0388045, Korean Patent Application Publication No. 10-2009-011163, Korean Patent No. 10-1767055, Korean Patent No. 10-1853624, and Korean Patent Application Publication No. 10-2020-0067464, etc. 
     However, the conventional sterilizer described above has a problem in that a user feels uncomfortable because it is configured to be exposed to the outside of the bed. That is, since cleaning equipment is present in a sleeping place, even if it does not actually smell, it is possible to perceive a smell (bad smell), which may cause serious discomfort. 
     Moreover, since the sterilizer is exposed to the outside of the bed, there is an inconvenience that interference occurs when the user gets on or off the bed. 
     Also, the conventional sterilizer is configured to be operated in a state installed on the outer surface of the bed frame, or to be operated in a state installed through the bed frame, and since the part where the sterilizer is installed or installed through is exposed to the outside, there is a disadvantage that not only the aesthetic sense of design is deteriorated, but there is difficulty in design improvement. 
     In addition, since the conventional sterilizer has a structure exposed to the outside, there is a problem in that foreign substances may be continuously or accidentally caught in the installation or operation part of the sterilizer, and contamination is generated due to accumulation of dust, etc., which causes discomfort to the user. 
     DOCUMENTS OF RELATED ART 
     
         
         (Patent Document 0001) Korean Utility Model Registration No. 20-0388045. 
         (Patent Document 0002) Korean Patent Application Publication No. 10-2009-011163. 
         (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 of mattress care device that may be stored in a hidden state without being exposed to the outside when not in use while facilitating smooth sterilization and cleaning of the mattress surface. 
     Another objective of the present disclosure is to provide a new type of mattress care device that allows UV-C irradiation to be performed as close to the surface of the mattress as possible to obtain a stable sterilization effect. 
     Yet another objective of the present disclosure is to provide a new type of mattress care device that may be used on any mattress regardless of mattress thickness. 
     In order to achieve the above objective, according to an embodiment of the present disclosure, there is provided a mattress care device including a bed frame that may be configured by having an accommodation part with an open top and a storage part with a closed top. 
     According to the mattress care device of the present disclosure, may be provided a lift operation part moving a mattress up and down. 
     According to the mattress care device of the present disclosure, a cleaning module may be configured to 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 cleaning module may be configured to move back and forth (i.e., along a top surface of a mattress, in multiple directions) positioned in the accommodation part when sterilization and cleaning are performed. 
     According to the mattress care device of the present disclosure, a cleaner moving part configured to move the cleaning module back and forth may be included. 
     According to the mattress care device of the present disclosure, a controller configured to control operations of the lift operation part, the cleaning module, and the cleaner moving part may be included. 
     According to the mattress care device of the present disclosure, the bed frame may be configured as a box body with an open top while having a front panel, opposite side panels, and a rear panel. 
     According to the mattress care device of the present disclosure, an edge part may be formed by protruding inward around a periphery of the open top of the bed frame. 
     According to the mattress care device of the present disclosure, the storage part may be formed on at least one side of a head-side portion and a foot-side portion of the accommodation part. 
     According to the mattress care device of the present disclosure, the storage part may be formed extending from the foot-side portion of the accommodation part. 
     According to the mattress care device of the present disclosure, the storage part may be configured to have a front and rear length for the cleaning module to be completely accommodated therein. 
     According to the mattress care device of the present disclosure, the lift operation part may be configured to have a lift frame on which the mattress is placed and a lift part for elevating the lift frame. 
     According to the mattress care device of the present disclosure, the lift part may be configured to have at least one ball screw while being rotated by driving of a screw rotation motor. 
     According to the mattress care device of the present disclosure, the lift frame may be installed to be raised and lowered by a forward and reverse rotation of the ball screw. 
     According to the mattress care device of the present disclosure, the lift operation part may operate such that, when sterilization and cleaning is performed, an upper surface of the mattress is positioned at a same height as a bottom surface of the cleaning module or is positioned lower than the bottom surface of the cleaning module. 
     According to the mattress care device of the present disclosure, the lift operation part may operate such that, when the cleaning module is not in use, an upper surface of the mattress is positioned higher than an upper surface of the bed frame. 
     According to the mattress care device of the present disclosure, a left and right length of the cleaning module may be configured to be longer than a left and right width of the mattress, and opposite ends of the cleaning module may be respectively connected to opposite side panels in the bed frame. 
     According to the mattress care device of the present disclosure, an inlet may be formed on a bottom surface of the cleaning module. 
     According to the mattress care device of the present disclosure, a fan motor for generating a vacuum suction force and a dust collector for collecting foreign substances sucked through the inlet may be provided in the cleaning module. 
     According to the mattress care device of the present disclosure, the inlet may be formed in a center of a bottom surface of the cleaning module. 
     According to the mattress care device of the present disclosure, the dust collector may be located on a center in the cleaning module. 
     According to the mattress care device of the present disclosure, two fan motors may be provided, one on each side of the dust collector. 
     According to the mattress care device of the present disclosure, a dust bag may be installed replaceably inside the dust collector. That is, the dust bag may be removably installed in the dust collector and may be removed from the dust collector for replacement or cleaning. 
     According to the mattress care device of the present disclosure, the upper surface of the dust collector may be configured to be open and closed with an open/close cover. 
     According to the mattress care device of the present disclosure, the dust collector may be configured to be connected to the inlet by a connection duct. 
     According to the mattress care device of the present disclosure, at least one wall of the cleaning module may be provided with an outlet through which air is discharged. 
     According to the mattress care device of the present disclosure, a UV-C irradiation part for radiating ultraviolet-c (UV-C) may be provided on a bottom surface of the cleaning module. 
     According to the mattress care device of the present disclosure, proximity sensors may be located in the front and rear of the cleaning module for detecting proximity to the front and rear surfaces of the bed frame. 
     According to the mattress care device of the present disclosure, the controller may be configured to control the operation of the cleaner moving unit based on the detection signal sensed by the proximity sensor. 
     According to the mattress care device of the present disclosure, the cleaner moving part may be configured to include: rack gears provided along opposite side panels of the bed frame; and pinion gears provided on opposite sides of the cleaning module and installed to be engaged with the rack gears respectively, and rotated by receiving a driving force of a gear driving motor to move along the respective rack gears. 
     According to the mattress care device of the present disclosure, guide parts for supporting both ends of the cleaning module may be provided on the opposite side panels in the bed frame, respectively, and the cleaning module may be configured to move in the front-rear direction of the bed frame by receiving the support of the respective guide parts. 
     As described above, the mattress care device of the present disclosure has an effect that the cleaning module can be stored without being exposed to the outside when not in use, since the bed frame is formed such that the accommodation part for accommodating the mattress and the storage part for storing the cleaning module are provided separately. 
     Also, the mattress care device of the present disclosure has an effect that the cleaning module is exposed only when the mattress is being cleaned as the mattress is configured to be raised and lowered inside the accommodation part by the lift operation part provided. 
     In addition, the mattress care device of the present disclosure has an effect that external exposure of the cleaning module can be prevented when it is not in use since the upper surface of the storage part is formed to be covered from the external environment, by a shielding plate. 
     Also, the mattress care device of the present disclosure has an effect that the cleaning module can be selectively moved to the accommodation part and to the storage part, since the storage part is formed to connect and communicate with the accommodation part. 
     In addition, the mattress care device of the present disclosure has an effect that it is possible to adjust the lift height of the mattress because the lift part includes a ball screw and a screw rotation motor, thus the device can be used on any mattress regardless of the thickness thereof. 
     Also, the mattress care device of the present disclosure has an effect that the cleaning module can clean the mattress by moving from the top of the mattress in the longitudinal direction (i.e., an extension direction of the bed frame) since the top surface of the mattress is positioned equal to or lower than the bottom surface of the cleaning module when the cleaning module is in use. 
     In addition, the mattress care device of the present disclosure has an effect that the part where the cleaning module is stored can be prevented from being exposed to the outside since the upper surface of the mattress is configured to be positioned higher than the upper surface of the bed frame when the cleaning module is not in use. 
     Also, the mattress care device of the present disclosure has an effect that the entire upper surface of the mattress can be cleaned since the left and right lengths of the cleaning module are longer than the mattress (i.e., the cleaning module may overlap at least an entire width of the mattress). 
     In addition, the mattress care device of the present disclosure has an effect that it is possible to clean the mattress to remove foreign substances on the surface of the mattress since the cleaning module is composed of a fan motor and a suction part having a dust collector. 
     Also, the mattress care device of the present disclosure has an effect that sterilization cleaning to kill bacteria on the surface of the mattress is possible since the UV-C irradiation part that radiates UV-C is provided on a bottom surface of the cleaning module. 
     In addition, the mattress care device of the present disclosure has an effect that it is possible to control the speed of a front movement and a rear movement of the cleaning module since the cleaner moving part includes rack gears and pinion gears. 
     Also, the mattress care device of the present disclosure has an effect that the cleaning module is exposed only when in use, since the mattress is installed in a way that it can be moved up and down inside the accommodation part of the bed frame. 
     In addition, the mattress care device of the present disclosure has an effect that sufficient vacuum suction power is provided regardless of the length of the cleaning module since the dust collector is located in the center of the cleaning module and fan motors are provided on both sides thereof. 
     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 to which a mattress care device according to an embodiment of the present invention is applied. 
         FIG. 2  is a side cross-sectional view showing a bed to which a mattress care device according to an embodiment of the present invention is applied. 
         FIG. 3  is a perspective view showing a state when the cleaning of the mattress by the mattress care device according to an embodiment of the present invention is performed. 
         FIG. 4  is a perspective view, different from that of  FIG. 3 , a state when the cleaning of the mattress by the mattress care device according to an embodiment of the present invention is performed. 
         FIG. 5  is an exploded perspective view of a mattress care device according to an embodiment of the present invention. 
         FIG. 6  is a bottom side perspective view of a mattress care device according to an embodiment of the present invention. 
         FIG. 7  is an enlarged view of “A” in  FIG. 2 . 
         FIG. 8  is a cross-sectional view showing the storage structure of the sterilization module of the mattress care device according to an embodiment of the present invention in an unused state. 
         FIG. 9  is an enlarged view of “B” in  FIG. 8 . 
         FIG. 10  is a perspective view showing the peripheral panel of the bed frame removed for explaining the installation structure for the sterilization module of the mattress care device according to an embodiment of the present invention. 
         FIG. 11  is a view of the main part for explaining the installation structure for the sterilization module of the mattress care device according to an embodiment of the present invention. 
         FIG. 12  is an enlarged view of “C” in  FIG. 11 . 
         FIG. 13  is an exploded perspective view of a sterilization module of a mattress care device according to an embodiment of the present invention. 
         FIG. 14  is a plan view showing the internal structure of the sterilization module constituting the mattress care device according to an embodiment of the present invention. 
         FIG. 15  is a plan view showing the cleaner moving part in the sterilization module constituting the mattress care device according to an embodiment of the present invention. 
         FIG. 16  is a state diagram showing the internal structure of the sterilization module constituting the mattress care device according to an embodiment of the present invention from the front. 
         FIG. 17  is a block diagram schematically shown to explain the control structure by the controller of the mattress care device according to an embodiment of the present invention. 
         FIG. 18  is a state diagram showing the internal structure of the sterilization module of the mattress care device according to the embodiment of the present disclosure from the front. 
     
    
    
     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. 
     Hereinafter, preferred embodiments of a mattress care device of the present disclosure will be described with reference to the accompanying  FIGS. 1 to 18 . 
       FIG. 1  is a perspective view showing a bed to which a mattress care device according to an embodiment of the present disclosure is applied; and  FIG. 2  is a side cross-sectional view showing a bed to which a mattress care device according to an embodiment of the present disclosure is applied. 
       FIGS. 3 and 4  are perspective views showing a state when the cleaning of the mattress by the mattress care device according to an embodiment of the present disclosure is performed;  FIG. 5  is an exploded perspective view of a mattress care device according to an embodiment of the present disclosure; and  FIG. 6  is a bottom side perspective view of a mattress care device according to an embodiment of the present disclosure. 
     As shown in these drawings, a mattress care device according to an embodiment of the present disclosure is configured such that, the mattress  10  is installed to be movable down to a position lower than the upper surface of the bed frame  100 , and a cleaning module  300  is provided for sterilizing and cleaning while moving on the upper part of the mattress  10  when the mattress  10  is moved downward. 
     That is, when the sterilization cleaning is not performed, the cleaning module  300  is not exposed to the outside and is kept in a hidden state to prevent a user&#39;s visual discomfort. 
     The mattress care device according to an embodiment of the present disclosure will be described as follows. 
     First, the mattress care device according to an embodiment of the present disclosure may be configured to include a bed frame  100 . 
     The bed frame  100  is configured to form the exterior of the bed. 
     The bed frame  100  may be formed as a box body (i.e., a box shape) with an open top while having opposite side panels  120  forming opposite side portions (i.e., a first side panel  120  and a second side panel  120 ). 
     Here, an edge part  140  may be formed to protrude inward around the upper surface of the bed frame  100 . The edge part  140  serves to cover cleaner moving parts  400  provided at both ends of the cleaning module  300  to be described later so that they are not exposed to the outside. The an edge part  140  may extend from the side panels  120  towards a center of the bed frame  100  and protrude inward around a periphery of the open top of the bed frame. 
     Of course, the edge part  140  is formed to protrude only a distance that does not interfere with the lifting movement of the mattress  10 . That is, the edge part  140  is formed to protrude by a distance in consideration of the left and right width and front and rear length of the mattress  10 . 
     In addition, the bed frame  100  is configured to include an accommodation part  101  and a storage part  102 . 
     The accommodation part  101  is a space from the head-side portion to the foot-side portion of the bed frame  100 . That is, the accommodation part  101  extends along a length of the bed frame  100  (i.e., extends in a longitudinal direction of the bed frame  100 ). 
     The storage part  102  is a space from the foot-side portion of the accommodation part  101  to the rear panel of the bed frame  100 , and the cleaning module  300  may be stored in the storage part  102 . 
     Here, the storage part  102  is provided to be connected and communicated with the rear side of the accommodation part  101 , thereby the cleaning module  300  can go back and forth between the storage part  102  and the accommodation part  101 . 
     The storage part  102  includes a shielding plate  150  blocking the internal space while forming an upper surface. That is, the shielding plate  150  prevents the cleaning module  300  stored therein from being exposed to the outside. 
     In particular, the storage part  102  may be formed to have a front and rear width sufficient to accommodate the cleaning module  300  completely. That is, when the cleaning module  300  is accommodated in the storage part  102 , the cleaning module  300  is not exposed to the outside. 
     Next, the mattress care device according to an embodiment of the present disclosure may be configured to include a lift operation part  200 . 
     The lift operation part  200  is a device provided for elevating the mattress  10 . 
     The lift operation part  200  may be operated such that the upper surface of the mattress  10  is the same height as the bottom surface of the cleaning module  300  or positioned lower than the bottom surface of the cleaning module  300  during sterilization cleaning. Accordingly, even if the position of the cleaning module  300  is not raised, the cleaning module  300  can be moved along the upper surface of the mattress  10 . 
     Also, the lift operation part  200  may operate such that the upper surface of the mattress  10  is positioned higher than the upper surface of the bed frame  100  when the cleaning module  300  is not in use. Accordingly, the cleaning module  300  may be stored in the storage part  102  without being exposed to the outside, thereby preventing the user&#39;s visual discomfort. 
     In the embodiment of the present disclosure, the lift operation part  200  is configured to include a lift frame  210  and a lift part  220  as shown in the attached  FIGS. 2 and 7 . 
     Here, the lift frame  210  is a portion on which the mattress  10  is placed, and it is preferable that two or more lift frames  210  are provided to support the front side bottom surface and the rear side bottom surface of the mattress  10  at the same time, as illustrated in  FIG. 2 . Of course, the lift frame  210  may be provided as one (i.e., a unitary member). 
     The lift part  220  may be configured to include at least one ball screw  222  while being rotated by driving a screw rotation motor  221  as a device for elevating the lift frame  210 . That is, the height of the lift frame  210  may be adjusted by the structure using the at least one ball screw  222 , thus making the lift frame  210  suitable for use on any mattress regardless of the thickness of the mattress  10 . 
     Here, the lift frame  210  may be installed to be raised and lowered while being connected to at least one link  211  that is folded or unfolded by the forward and reverse rotation of the ball screw  222 . 
     The link  211  may be provided in two or more plural, and each link  211  may be rotatably installed in a plurality of ball housings  223  coupled to a ball screw  222 , respectively. That is, a single ball screw  222  may be coupled to a plurality of ball housings  223  to lift the at least one lift frame  210 . Here, the ball housings  223  are coupled to the ball screw  222  and are configured to move in the axial direction of the ball screw  222  by forward and reverse rotation of the ball screw  222 . 
     In other words, the ball housings  223  are moved along the axial direction of the ball screw  222  by the rotation of the ball screw  222  and accordingly, each link  211  is erected (refer to attached  FIGS. 2 and 7 ) or laid down (refer to attached  FIGS. 8 and 9 ), moving the lift frame  210  up or down. The combination of the links  211 , the ball housings  223  and the ball screw(s)  222  act as a jack for lifting the lift frame  210  and thus lifting the mattress  10  disposed on the lift frame  210 . 
     Of course, a support frame  11  may be configured to be coupled to the upper surface of the lift frame  210 , and the mattress  10  may be configured to be placed on the upper surface of the support frame  11 . The support frame  11  may be sized to overlap an entirety of the mattress  10  or the support frame  11  may be sized to overlap a majority of the mattress  10 . Further, the lift frame  210  may be fixedly attached to the support frame  11 . For example, the lift frame  210  may be removably attached to the support frame  11  via fasteners, or may be permanently attached to the support frame  11  by welding, brazing or the like. Further, the support frame  11  may be the in form of rectangular shaped frame having a plurality of openings (i.e., windows), and each lift frame  210  may have an “H” shape and may directly engage the support frame  11 . 
     The screw rotation motor  221  may be configured to be positioned in the bottom space within the storage part  102 . That is, the screw rotation motor  221  can move the mattress  10  downward as much as possible since it is not located in the accommodation part  101 , also, the screw rotation motor  221  does not interfere with the movement of the cleaning module  300  located in the upper space, since it is located in the lower space in the storage part  102 . 
     The screw rotation motor  221  may be installed to be raised and lowered in the bottom space of the storage part while being installed on a lift plate  230 . Further, the lift plate  230  may be attached to the bed frame  100 . That is, considering that the ball screw  222  is also moved up and down due to the rotation of the links  211  by the operation of the lift part  220 , the screw rotation motor  221  may also be lifted up and down together. 
     Meanwhile, the lift operation part  200  may have various structures other than the structure using the above-described ball screw  222 . 
     For example, the lift operation part  200  may have various structures using an actuator, a plurality of links, or a plurality of gears. 
     Next, the mattress care device according to an embodiment of the present disclosure is configured to include a cleaning module  300 . 
     The cleaning module  300  is a device provided to clean the surface of the mattress  10 . 
     The cleaning module  300  is positioned to be stored in the storage part  102  when not in use as shown in  FIGS. 1 and 2 , while being located in the accommodation part  101  outside the storage part  102  when used as shown in  FIGS. 3, 4, and 8  to move back and forth. 
     The accompanying  FIGS. 10 to 16  show the structure for each direction and each state of the cleaning module  300 . 
     As shown in these drawings, the cleaning module  300  is configured to include a case  310  forming an exterior of the cleaning module  300 . 
     The left and right length of the case  310  is formed to be longer than the left and right width of the mattress  10 , and both ends of the case are respectively connected to opposite side panels in the bed frame  100 . 
     The case  310  has an inlet  311  through which air is sucked and an outlet port  312  through which air is discharged. That is, the air sucked into the case  310  through the inlet  311  can be discharged through the outlet  312 , as shown in  FIG. 13 . The inlet  311  may extend substantially an entire width of the cleaning module  300  (e.g., of the bottom surface of the cleaning module  300 ). 
     Here, the inlet  311  may be formed along the longitudinal direction on the bottom surface of the case  310 . In particular, the inlet  311  may be formed to be equal to or longer than the left and right length of the mattress  10 . 
     The outlet  312  may be formed on at least one wall of opposite side walls of the case  310  or may be formed on at least one of the upper surfaces of both ends of the case  310 . 
     If the outlet  312  is formed on the upper surface of the case  310 , there is a fear that the user may feel uncomfortable because the exhaust air is discharged to the upper portion of the cleaning module  300 . Considering this, the outlet  312  may be preferably formed on opposite side walls of the case  310  or may be preferably formed on opposite side bottom surfaces. 
     A filter (e.g., a HEPA filter or any type of filter) for filtering fine dust, allergens, viruses, bacteria, and like, from the discharged air may be provided at the outlet  312 . 
     In addition, the cleaning module  300  may be configured to include a suction part  320 . 
     The suction part  320  is a configuration for vacuum suction of foreign substances on the surface of the mattress  10 , and may be configured to include a dust collector  321  and a fan motor  322  installed in (i.e., positioned in) the case  310 . 
     The dust collector  321  is configured to collect foreign substances that are suctioned and flowed through the inlet  311  while being located on the center of the case  310 . 
     A connection hole  321   a  connecting and communicating with the inside of the dust collector  321  is formed on the front wall of the dust collector  321 , and the connection hole  321   a  is configured to be connected to the inlet  311  and a connection duct  314 . Air and foreign substances sucked in through the inlet  311  are guided by the connection duct  314  and pass through the connection hole  321   a.    
     A dust bag  323  may be removably installed inside the dust collector  321  so as to be replaceable, in this way, foreign substances in the air passing through the dust collector  321  may be filtered by the dust bag  323 . 
     The upper surface of the dust collector  321  is configured to be openable and with an open/close cover  321   b , thus enabling replacement of the dust bag  323 . 
     The fan motor  322  is a device that generates a vacuum suction force, and may be provided on at least one side of the dust collector  321 . 
     Preferably, as shown in  FIGS. 13, 14, and 16 , the fan motor  322  may be provided in two, with one fan motor  322  on each side of the dust collector  321 . 
     The air flowing into the dust collector  321  and passing through the dust bag  323  passes through each fan motor  322 , flows to both sides in the case  310 , and then is discharged to through the outlet  312 . Here, the air that has passed through the fan motor  322  may be discharged to the outlet  312  by being guided by the outlet duct  315 . 
     The cleaning module  300  may include a UV-C irradiation part  330  for radiating UV-C as shown in  FIG. 16 . That is, the upper surface of the mattress  10  may be sterilized thanks to the UV-C irradiated by the UV-C irradiation part  330 . 
     The UV-C irradiation part  330  may be provided on at least one portion of the bottom surface of the case  310  constituting the cleaning module  300 , and preferably, it may be provided on a peripheral portion of the bottom surface of the case  310 . The UV-C irradiation part  330  is shown in  FIG. 16 . 
     The UV-C irradiation part  330  may be composed of any one of a UV-C lamp and a UV-C LED, or may be composed of any type of UV light that has a sterilization effect. In an embodiment of the present disclosure, it is assumed that the UV-C irradiation part  330  is composed of a UV-C LED. 
     The cleaning module  300  may be provided with a proximity sensor  340  for detecting proximity to the bed frame  100 . With the proximity sensor  340 , the cleaning module  300  may reach a position as close as possible without colliding with the front-side panel or the rear-side panel of the bed frame  100 . 
     The proximity sensor  340  may be formed one each on the front and rear surfaces of the cleaning module  300 . 
     The proximity sensor  340  may be configured as a general optical sensor, or may be configured as a switch whose contact is on or off depending on the contact. 
     The proximity sensor  340  may be provided in the bed frame  100  rather than in the cleaning module  300 . 
     Meanwhile, the cleaning module  300  is configured to be moved in the front-rear direction of the bed frame  100  while maintaining the same height by receiving the support of a guide part  160 . 
     The guide part  160  may be formed on at least one of the opposite surfaces between the bed frame  100  and the cleaning module  300 . 
     In an embodiment of the present disclosure, it is suggested that both ends of the case  310  constituting the cleaning module  300  may be raised while the guide parts  160  protrude inward from the inner surfaces of opposite sides of the bed frame  100 . That is, the cleaning module  300  may be moved back and forth with both ends mounted on each of the guide parts  160 , respectively. 
     Next, the mattress care device according to an embodiment of the present disclosure is configured to include a cleaner moving part  400 . 
     The cleaner moving part  400  is configured such that the cleaning module  300  is moved in the front-rear direction within the bed frame  100 . 
     The cleaner moving part  400  may have a rack and pinion structure as shown in  FIG. 12 . 
     For example, the rack gears  410  are formed along opposite side panels  120  in the bed frame  100  and pinion gears  420  engaged with the respective rack gears  410  are provided on both sides (i.e., opposing sides) of the cleaning module  300 , thus the cleaning module  300  may be moved in the front-rear direction within the bed frame  100 . 
     Here, the pinion gears  420  are installed to penetrate opposite side walls of the case  310  so that parts thereof is exposed to the outside of the case  310 , and gear driving motors  430  (i.e., two opposing gear driving motors  430  provided at opposite sides of the case  310 ) for driving the pinion gears  420  are provided on both sides of the case  310 . 
     Each gear driving motor  430  may be installed directly connected to the pinion gear  420 , or as shown in the embodiment, it may be installed to rotate the pinion gear  420  using another power transmission gear  421 . 
     Next, the mattress care device according to an embodiment of the present disclosure is configured to include a controller  500 . 
     The controller  500 , as shown in  FIG. 17 , may be configured to control the operation of the lift operation part  200 , the cleaning module  300 , and the cleaner moving part  400 . 
     That is, the controller  500  may control the lifting operation of the mattress  10  while controlling the screw rotation motor  221 , may control the forward and backward movement of the cleaning module  300  by controlling the operation of the gear driving motor(s)  430 , and may control the operation of the cleaning module  300  by controlling the fan motor  322  and the UV-C irradiation part  330 . 
     The controller  500  may be configured to include an operation part  510  for manual operation. The operation part  510  may be provided in the bed frame  100  or in the cleaning module  300 . 
     Preferably, the operation part  510  may be provided on any one of the outer surfaces of the bed frame  100 , and the controller  500  may be provided in the lift operation part  200  or in the cleaning module  300 . 
     The controller  500  may be configured to be operated through a user&#39;s mobile terminal, home network, or other online control (e.g., cellular network, Bluetooth™ or the like). 
     Especially, the controller  500  may be configured to control the moving speed of the cleaning module  300  differently according to the operation of the UV-C irradiation part  330 . 
     That is, when the irradiation part  330  is emitted so that UV-C is irradiated, the moving speed of the cleaning module  300  or a moving frame  200  is controlled to move slower than the moving speed when the UV-C irradiation part  330  does not emit light. Accordingly, UV-C may be sufficiently irradiated to the mattress  10  to obtain a sterilization effect, and when only suction cleaning is performed without sterilization cleaning, the cleaning time may be shortened. 
     In addition, the controller  500  may be configured to control the front and rear movement of the cleaning module  300  to be stopped when a sensing signal is received from the proximity sensor  340  provided in the cleaning module  300 . 
     In the following, the cleaning process of the mattress  10  using the mattress care device of the present disclosure described above will be described in more detail. 
     To begin with, in the case in which the cleaning of the mattress  10  is not performed, the mattress  10  is maintained in a state in which at least a portion protrudes from the accommodation part  101  of the bed frame  100  by the lift operation part  200 . 
     The cleaning module  300  is stored in a state located in the storage part  102  of the bed frame  100 , and the storage part  102  is prevented from being exposed to the outside by the shielding plate  150 , the shielding plate  150  forming the upper surface of the bed frame  100 , so that the cleaning module  300  is not visible to the outside. This is as shown in the attached  FIGS. 1-4 . 
     In this initial state, when a preset cleaning cycle arrives (i.e. is automatically performed) or a user&#39;s operation through the operation part  510  occurs and a cleaning request is made, the controller  500  controls the lift operation part  200  to control the mattress  10  to move down. 
     That is, the ball screw  222  is rotated while the screw rotation motor  221  is driven under the control of the controller  500 , thereby the lift frame  210  is lowered and the mattress  10  placed on the upper surface of the lift frame  210  is also lowered (i.e., the mattress  10  is lowered with the lowering of the lift frame  210 ) and the mattress  10  is accommodated in the accommodation part  101  while descending and once fully descended. This is as shown in attached  FIGS. 7 and 8 . 
     The lowering of the mattress  10  is continued until the upper surface of the mattress  10  is positioned at the same height as the bottom surface of the cleaning module  300  or is positioned lower than the bottom surface of the cleaning module  300 . The descending distance of the mattress  10  may be preset by the user or controlled to be moved automatically using a sensor. 
     When the lowering of the mattress  10  is completed, the cleaning module  300  is moved forward (i.e., toward the front side of the bed frame) while the operation control of the cleaner moving part  400  is performed. 
     That is, the gear driving motors  430  constituting the cleaner moving part  400  are driven to rotate the respective pinion gear  420 , as a result, the pinion gears  420  are moved in the direction in which the rack gears  410  while being engaged with the rack gear  410 . This is as shown in the attached  FIGS. 3, 4 and 12 . 
     At this time, the cleaning module  300  is moved with its both ends mounted on the guide part  160  as shown in  FIG. 12 . 
     In addition, when the cleaning module  300  is moved forward, the fan motor  322  of the suction part  320  may be controlled to operate together, by the controller  500 . 
     The fan motor  322  is controlled, by the controller  500 , to operate from when the cleaning module  300  is moved, or from when the cleaning module  300  leaves the storage part  102  and is positioned on the upper surface of the rear side of the mattress  10 . 
     When the fan motor  322  is operated, an air suction force is generated through the inlet  311 . 
     By the air suction force generated in this way, foreign substances existing on the surface of the mattress  10  are introduced into the dust bag  323  in the dust collector  321  after sequentially passing through the inlet  311 , the connecting duct  314 , and the connection hole  321   a.    
     Thereafter, the foreign substances are filtered in the dust bag  323  and the air flows out of the dust bag  323  to both sides (i.e., opposing sides) of the case  310  and then is discharged to the outside of the cleaning module  300  through the outlet  312 . Since a filter (e.g., a HEPA filter) is provided at the outlet  312 , fine dust contained in the air passing through the outlet  312  is filtered by the filter. 
     In this way, the cleaning module  300  is moved from the rear end to the front end of the mattress  10  to suck the foreign substances present on the upper surface of the mattress  10  and collect the dust in the dust bag  323  disposed in the dust collector  321 . 
     The controller  500  confirms that the cleaning module  300  reaches the front end of the mattress  10  through the proximity sensor  340 , and when the cleaning module  300  reaches the front end of the mattress  10 , the operation of the gear driving motor  430  constituting the cleaner moving part  400  is controlled, by the controller  500 , to stop. 
     Thereafter, the controller  500  cleans the surface of the mattress  10  again by controlling the cleaning module  300  to move in the reverse direction (moving toward the rear side of the mattress  10 ). Of course, when the forward movement of the cleaning module  300  is terminated and the cleaning module  300  is returned to an initial position (i.e., a position inside of the storage part  102 ), the suction part  320  is not operated and may be controlled, by the controller  500 , to return to its initial position quickly. 
     Meanwhile, during the cleaning of the mattress  10  described above, the UV-C irradiation part  330  of the cleaning module  300  may be operated according to the user&#39;s setting or operation. 
     Of course, the UV-C irradiation part  330  may be controlled, by the controller  500 , to operate independently, not simultaneously with the suction part  320 , or may be controlled to operate only when the cleaning module  300  moves forward or backward, or can be controlled to simultaneously operate when the suction part  320  is operated. 
     In this way, when the UV-C irradiation part  330  is operated, UV-C is radiated to the surface of the mattress  10 , thereby killing pests (i.e., viruses) and/or bacteria present in the mattress  10 . 
     In particular, when the UV-C irradiation part  330  of the cleaning module  300  is operated, the cleaning module  300  is controlled to move more slowly than when only the suction part  320  is operated. That is, when the UV-C irradiation part  330  is operated, the cleaning module  300  is controlled to move more slowly so that the sterilization effect using UV-C may be sufficiently obtained. 
     Meanwhile, when the above-described cleaning of the surface of the mattress  10  is completed, the cleaning module  300  is returned into the storage part  102 , and then the mattress  10  is moved upward from the accommodation part  101  by the operation of the lift operation part  200  to protrude from the accommodation part  101 . 
     Therefore, the storage part  102  and the accommodation part  101  are covered by the mattress  10  so that the cleaning module  300  stored in the storage part  102  may also be stored in a state in which its exposure to the outside is prevented. 
     If the dust bag  323  is to be replaced, the open/close cover  321   b  is opened and the upper surface of the dust collector  321  is opened. 
     To sum up, the mattress care device of the present disclosure can automatically sterilize and vacuum the mattress  10 , thereby enabling continuous care of the mattress  10 . 
     Also, in the case of the mattress care device of the present disclosure, the user does not feel discomfort because the cleaning module  300  does not exposed to the outside while being stored in the storage part  102  when the cleaning module  300  does not perform cleaning of the mattress  10 , and no interference occurs when the user gets on and off the bed. 
     In addition, in the case of the mattress care device of the present disclosure, since the device cleans the mattress  10  while the sterilizer  300  operates in a state located in the bed frame  100 , it is possible to freely design the exterior of the bed frame  100  or the exterior of the mattress  10 . 
     Also, in the case of the mattress care device of the present disclosure, the operation part of the cleaning module  300  is not exposed to the outside, so that the malfunction caused by the entrapment of foreign substances can be prevented. 
     In addition, in the case of the mattress care device of the present disclosure, the height adjustment of the lift frame  210  is possible as the lift part  220  constituting the lift operation part  200  is configured using a ball screw  222  that is rotated by the driving of the screw rotation motor  221 , thus making the mattress care device suitable for use on any mattress regardless of the thickness of the mattress  10 . 
     Moreover, the mattress care device of the present disclosure is not limited to being implemented only with the structure of the above-described embodiment. 
     For example, the mattress care device of the present disclosure may include a vibration part  250  in the cleaning module  300 . That is, as the vibration part  250  may be additionally provided, the surface of the mattress  10  through which the cleaning module  300  passes is vibrated by the vibration part  250 , and foreign substances such as dust adhering to the surface of the mattress  10  are dropped so that they can be easily sucked. 
     The vibration part  250  includes a vibration source  251 , such as an ultrasonic vibrator or a vibration motor, and a vibration plate  252  vibrating up and down by the operation of the vibration source  251  as shown in the attached  FIG. 18 . 
     Various embodiments described herein may be implemented in a computer-readable medium using, for example, software, hardware, or some combination thereof. For example, the embodiments described herein may be implemented within one or more of Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a selective combination thereof. In some cases, such embodiments are implemented by the controller. That is, the controller is a hardware-embedded processor executing the appropriate algorithms (e.g., flowcharts) for performing the described functions and thus has sufficient structure. Also, the embodiments such as procedures and functions may be implemented together with separate software modules each of which performs at least one of functions and operations. The software codes can be implemented with a software application written in any suitable programming language. Also, the software codes can be stored in the memory and executed by the controller, thus making the controller a type of special purpose controller specifically configured to carry out the described functions and algorithms. Thus, the components shown in the drawings have sufficient structure to implement the appropriate algorithms for performing the described functions. 
     As such, the mattress care device of the present disclosure may be implemented in various forms. 
     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.