Patent Publication Number: US-10765590-B2

Title: Foam generator for inverted compression receptacles

Description:
TECHNICAL FIELD 
     The present invention relates to a foam generator for inverted compression receptacles, and more particularly to a foam generator for inverted compression receptacles that mixes liquid contents with air and discharges the mixture in the form of foam when an inverted compression receptacle is directly compressed. 
     BACKGROUND ART 
     In general, a foam generator mixes liquid contents stored in a receptacle with air in an air and liquid mixing chamber and then forms and discharges uniform foam liquid through a filtration net. Such a foam generator is used for various purposes, such as shampoos, hair cosmetics, or cleansers used in bathrooms, kitchens, and restrooms. 
     A conventional foam generator is used to mix liquid contents with an appropriate amount of air and to extrude the mixture in the form of foam. In products to which such a foam generator is applied, a receptacle must be filled with compressed gas, making it technically difficult to manufacture the receptacle. The receptacle must be shaken whenever the receptacle is used. Also, in the state in which the product receptacle is inclined, the liquid filling the receptacle cannot be ejected in the form of foam, and only the compressed gas is ejected. 
     In order to solve the above problem, a foaming pump assembly that appropriately mixes liquid contents with external air and ejects the mixture in the form of foam without filling the foaming pump assembly with compressed air or without shaking the foaming pump assembly is disclosed in Korean Registered Utility Model No. 20-0169773 (Title of the Device: Air valve device of foam generator). 
     As shown in  FIG. 1 , the foaming pump assembly disclosed in Korean Registered Utility Model No. 20-0169773 includes a cap  1  coupled to the neck of a receptacle A having (liquid) contents stored therein in a screw coupling manner, a cylinder body  2  fixed in the cap  1 , the cylinder body  2  having an air cylinder  2   a  having a negative pressure hole  2   b  formed therein and a long cylindrical liquid cylinder  2   c  integrally formed at the center of the lower part of the air cylinder  2   a  such that the (liquid) contents are introduced into the liquid cylinder  2   c,  a nozzle  3  installed to the cap  1  so as to be supported by the cap  1  such that one end thereof can be movable into the cylinder body  2 , the nozzle  3  having an outlet  3   a,  through which foam is ejected, an air piston  4  having an upper part fixed to the inner circumference of the nozzle  3  and the outer circumference of a lower end disposed in tight contact with the inner circumference of the air cylinder  2   a  such that the air piston  4  presses the lower part of the air cylinder  2   a  and expands the upper part of the air cylinder  2   a  when the nozzle  3  is pushed, a liquid piston  6  disposed between a coil spring  5  provided at the lower part of the liquid cylinder  2   c  of the cylinder body  2  and the air piston  4  for elastically supporting the nozzle  3  upward and guiding the compressed air and the contents to the upper part of the air piston  4 , and a ball  8  located at the bottom part of the liquid cylinder  2   c  of the cylinder body  2  for selectively opening and closing a liquid suction port  7 . A filtration net  9  for filtering foam is disposed in the nozzle  3 . 
     In the conventional foaming pump assembly, when the nozzle  3  is repeatedly pushed, the (liquid) contents filling the receptacle A are suctioned/pumped through the liquid cylinder  2   c.  At the same time, air is ejected from the air cylinder  2   a.  As a result, foam is generated. The foam is uniformly filtered through the filtration net  9  and is then ejected to the outside through the outlet  3   a  in the nozzle  3 . 
     In the conventional foaming pump assembly, however, not only the structure for compressing and discharging air but also the structure for mixing suctioned liquid contents with the air and discharging the mixture in the form of foam are more complicated than necessary, whereby assembly productivity is lowered and costs are also increased. In addition, it is necessary for a user to receive foam discharged through the outlet  3   a  in the nozzle  3  with one hand while repeatedly pushing the nozzle  3  with another hand, which is inconvenient. 
     DISCLOSURE 
     Technical Problem 
     The present invention has been made in view of the above problems, and it is an object of the present invention to provide a foam generator for inverted compression receptacles simply configured such that liquid contents in a compression receptacle having the liquid contents stored therein are mixed with air and the mixture is discharged in the form of foam by the pressure generated in the compression receptacle when the compression receptacle is compressed, wherein an inverted compression receptacle is used as the compression receptacle such that foam can be directly ejected to a target, thereby achieving convenient use thereof using one hand. 
     It is another object of the present invention to provide a foam generator for inverted compression receptacles having a discharge blocking function, whereby it is possible to more stably use the product and to prevent the leakage of liquid from the product during the distribution of the product. 
     It is a further object of the present invention to provide a foam generator for inverted compression receptacles including a massage member such that a user can directly and uniformly apply the ejected foam to his/her skin without using the palms of his/her hands. 
     Technical Solution 
     In order to accomplish the above objects, the present invention provides a foam generator for inverted compression receptacles including: an inverted compression receptacle having liquid contents stored therein, the inverted compression receptacle being provided at the lower part thereof with a neck having screw threads formed therein; a cap main body including a large cap part fastened to the neck of the inverted compression receptacle in a screw coupling manner, an upward and downward movement guide wall disposed at the outside of the large cap part, the upward and downward movement guide wall being formed in the shape of a cylinder, and a foam discharge part protruding from the lower part of the large cap part in the shape of a pipe having a reduced diameter while a step is formed at the upper end thereof, the lower part of the foam discharge part being open, an air hole for allowing external air to be introduced therethrough being formed in the step; a content discharge guide configured such that the edge thereof is fitted, received, and disposed in the lower side of the large cap part of the cap main body so as to be spaced apart from the upper part of the step of the cap main body, the content discharge guide including a discharge guide part having a liquid discharge port formed in the central region thereof so as to be recessed concavely and a cylindrical discharge channel protruding from the upper part of the center of the discharge guide part for guiding the discharge of the liquid contents, the discharge guide part being provided at the edge thereof with an air discharge port, through which air in the inverted compression receptacle can move to the lower side of the discharge guide part when the inverted compression receptacle is compressed, and with an air introduction port, through which external air is introduced into the inverted compression receptacle when the inverted compression receptacle is restored to the original state thereof; a valve housing including a cylindrical coupling part fitted and coupled into the upper part of the content discharge guide so as to cover the upper part of the content discharge guide such that an air compartment, which communicates with the air discharge port and the air introduction port, is defined in the cylindrical coupling part, the cylindrical coupling part being provided in the central region thereof with a content suction port, the cylindrical coupling part being coaxially fitted and coupled into the discharge channel defined in the content discharge guide, a content check valve, for selectively opening and closing the content suction port depending on whether the inverted compression receptacle is compressed, being received and disposed in the cylindrical coupling part, a tube fitting port protruding from the upper surface of the valve housing so as to communicate with the air compartment; an air tube, having a lower end fitted and coupled into the tube fitting port of the valve housing and an upper end extending toward the upper part of the inverted compression receptacle, for allowing the upper space in the inverted compression receptacle, in which air remains, and the air compartment to communicate with each other therethrough; an air check valve unit made of an elastic material, the air check valve unit including a ring-shaped partition wall, having an upper end disposed in tight contact with the lower surface of the content discharge guide and a lower end disposed in tight contact with the upper part of the step of the cap main body, for defining an air and liquid mixing chamber in the foam discharge part, a first check valve part disposed inside the partition wall so as to extend upward toward the central part thereof, an end of the first check valve part being disposed in elastically tight contact with the discharge guide part of the content discharge guide, the first check valve part being configured to allow the air in the inverted compression receptacle to move to the air and liquid mixing chamber through the air discharge port when the inverted compression receptacle is compressed, and a second check valve part disposed outside the partition wall so as to extend downward toward the outside, an end of the second check valve part being disposed in elastically tight contact with the outside of the step of the cap main body, the second check valve part being configured to close the air hole when the inverted compression receptacle is compressed and to open the air hole when the inverted compression receptacle is restored to the original state thereof such that external air can be introduced; a filtration member fitted, received, and disposed in the foam discharge part of the cap main body, the filtration member being formed in the shape of a cylinder having open upper and lower parts, the filtration member being provided at the upper and lower surfaces thereof with filtration nets, the filtration member being configured to guide the discharge of foam formed as the result of the liquid contents being mixed with air in the air and liquid mixing chamber while homogenizing the foam; and an upward and downward movement cap including a cylindrical wall surface having an upper end received in and coupled to the upward and downward movement guide wall of the cap main body so as to be movable upward and downward and a lower surface configured to cover the lower part of the cap main body, the lower surface being provided with a plurality of foam distribution holes, through which the foam that has passed through the filtration member is discharged to the outside in a distributed manner, the upward and downward movement cap being provided at the center of the lower surface thereof with a cylindrical blocking wall in a protruding manner for selectively opening and closing the foam discharge part according to the upward and downward manipulation thereof. 
     In addition, the content check valve may include: a valve body disposed in the coupling part of the valve housing so as to be slidable vertically for opening and closing the content suction port, the upper end of the valve body being formed in a conical shape; and an elastic member for elastically supporting the valve body upward in the coupling part of the valve housing. 
     In addition, the foam generator for inverted compression receptacles may further include a massage member, wherein the massage member may include: a base fitted and mounted in the lower part of the upward and downward movement cap, the base being provided therein with a plurality of communication ports, which communicate with the respective foam distribution holes; and massage bristles provided at the lower surface of the base for uniformly applying foam discharged through the communication ports to the skin of a user. 
     In addition, support shafts may be formed inside the upward and downward movement guide wall in a protruding manner such that the support shafts are opposite each other, and the upward and downward movement cap may be provided at the outside of the wall surface thereof with spiral grooves for receiving the support shafts, the spiral grooves being formed so as to be opposite each other over a predetermined region, the upward and downward movement cap being disposed so as to move upward or downward to the regular positions thereof by rotating the upward and downward movement cap in a forward direction or a reverse direction, whereby, when the upward and downward movement cap is moved maximally downward as the result of the rotation of the upward and downward movement cap in the forward direction, the cylindrical blocking wall may open the foam discharge part, and when the upward and downward movement cap is moved maximally upward as the result of the rotation of the upward and downward movement cap in the reverse direction, the cylindrical blocking wall may close the foam discharge part. 
     Advantageous Effects 
     In the foam generator for inverted compression receptacles according to the present invention having the above-stated structure, liquid contents, discharged out of the inverted compression receptacle having the liquid contents stored therein through the content check valve opened by the pressure generated in the inverted compression receptacle when the inverted compression receptacle is directly compressed, are mixed with air in the air and liquid mixing chamber, and the mixture is directly discharged in the form of foam. Consequently, the mechanical structure for instantly discharging the liquid contents in the form of foam when the inverted compression receptacle is compressed is configured so as to be simpler than the conventional art, and product responsiveness is improved. In particular, the inverted compression receptacle can be directly compressed by a user using one hand such that the contents are discharged in the form of foam, whereby it is possible to improve user convenience. 
     Also, in the foam generator for inverted compression receptacles according to the present invention, the user can apply the ejected foam to his/her skin or can cleanse his/her skin using the massage member. In particular, the user can directly and uniformly apply the ejected foam (the contents) to his/her skin using the massage member, akin to massaging the skin of the user without using the palms of the hands. 
     Furthermore, in the foam generator for inverted compression receptacles according to the present invention, the upward and downward movement cap can be moved upward and downward to easily open and close the foam discharge part by manipulating the upward and downward movement cap in the forward direction and the reverse direction, whereby it is possible to more stably use the product and to prevent the leakage of liquid from the product during the distribution of the product. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIG. 1  is a view showing an air valve device of a foam generator disclosed in Korean Registered Utility Model No. 20-0169773, which is a conventional art; 
         FIG. 2  is a sectional view showing the overall interior structure of a foam generator for inverted compression receptacles according to the present invention; 
         FIG. 3  is an extracted enlarged sectional view showing the interior structure of the foam generator for inverted compression receptacles according to the present invention, from which an inverted compression receptacle has been removed; 
         FIG. 4  is an exploded sectional view of the foam generator for inverted compression receptacles according to the present invention; 
         FIG. 5  is an exploded perspective view of the foam generator for inverted compression receptacles according to the present invention; 
         FIG. 6  is an extracted sectional view showing the coupling structure of a valve housing according to the present invention; 
         FIG. 7  is a view showing a foam ejection process of the foam generator for inverted compression receptacles according to the present invention; 
         FIG. 8  is a view showing a restoration process (an external air suction process) of the foam generator for inverted compression receptacles according to the present invention; and 
         FIG. 9  is a view showing the state in which the foam generator for inverted compression receptacles according to the present invention has been locked using an upward and downward movement cap. 
     
    
    
     DESCRIPTION OF REFERENCE SYMBOLS 
       100  . . . Inverted compression receptacle  110  . . . Neck  200  . . . Cap main body 
       210  . . . Large cap part  220  . . . Upward and downward movement guide wall  230  . . . Step 
       240  . . . Foam discharge part  250 : Air hole  260 : Support shafts 
       300  . . . Content discharge guide  310  . . . Edge  320  . . . Discharge guide part 
       330  . . . Liquid discharge ports  340  . . . Discharge channel  350  . . . Air discharge ports 
       360  . . . Air introduction ports  400  . . . Valve housing  410  . . . Air compartment 
       420  . . . Content suction port  430  . . . Content check valve  431  . . . Valve body 
       432  . . . Elastic member  440  . . . Coupling part  450  . . . Tube fitting port 
       500  . . . Air tube  600  . . . Air check valve unit  610  . . . Partition wall 
       620  . . . First check valve part  630  . . . Second check valve part  700  . . . Filtration member 
       710  . . . Body  720 ,  730  . . . Filtration nets  800  . . . Upward and downward movement cap 
       810  . . . Wall surface  820  . . . Lower surface  830  . . . Filtration distribution holes 
       840  . . . Cylindrical blocking wall  850  . . . Spiral grooves  900  . . . Massage member 
       910  . . . Base  920  . . . Communication ports  930  . . . Massage bristles 
     S . . . Air and liquid mixing chamber 
     BEST MODE 
     Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Briefly describing the accompanying drawings,  FIGS. 2 to 6  show the structure of a foam generator for inverted compression receptacles according to the present invention, and  FIGS. 7 to 9  show the state in which the foam generator for inverted compression receptacles according to the present invention is used. 
     Description of Structure of Foam Generator for Inverted Compression Receptacles According to the Present Invention 
     The foam generator for inverted compression receptacles according to the present invention is mounted to a neck of an inverted compression receptacle having contents stored therein such that liquid contents are discharged out of the inverted compression receptacle in the form of foam while the liquid contents are mixed with air using the pressure generated in the inverted compression receptacle when the inverted compression receptacle is directly compressed. As shown in  FIGS. 2 and 3 , the foam generator for inverted compression receptacles includes an inverted compression receptacle  100  having liquid contents stored therein, the inverted compression receptacle  100  being configured to be restored to the original state thereof due to the elastic force thereof, a cap main body  200  coupled to a neck  110  of the inverted compression receptacle  100 , a content discharge guide  300  received and disposed in the cap main body  200  for guiding the discharge of the liquid contents and air when the inverted compression receptacle  100  is compressed, a valve housing  400  coupled to the upper part of the content discharge guide  300 , a content check valve  430  for controlling the discharge of the liquid contents being mounted in the valve housing  400 , an air check valve unit  600  for controlling the suction and discharge of air according to the compression and restoration operation of the inverted compression receptacle  100 , a filtration member  700  received and disposed in the cap main body  200  for homogenizing foam formed as the result of the liquid contents being mixed with air, an upward and downward movement cap  800  assembled to the lower part of the cap main body  200  so as to be movable upward and downward for ejecting the foam to the outside, and a massage member  900  mounted to the lower part of the upward and downward movement cap  800 . The detailed structures of the respective components constituting the foam generator for inverted compression receptacles according to the present invention are as follows. 
     First, the inverted compression receptacle  100  has liquid contents stored therein. As shown in  FIG. 2 , the inverted compression receptacle  100  is made of soft synthetic resin, which can be compressed by a user using his/her hand and which can be restored to the original state thereof when the compression force is removed. Screw threads are formed in the outer wall of the neck  110  of the inverted compression receptacle  100 , which is used in the inverted state. The neck  110  is formed at the lower part of the inverted compression receptacle  100  based on the state in which the inverted compression receptacle  100  is used. 
     The cap main body  200  is made of hard synthetic resin. As shown in  FIGS. 3 to 5 , the cap main body  200  includes a large cap part  210  fastened to the neck  110  of the inverted compression receptacle  100  in a screw coupling manner and a foam discharge part  240  protruding from the lower part of the large cap part  210  in the shape of a pipe having a reduced diameter while a step  230  is formed at the upper end thereof, the lower part of the foam discharge part  240  being open. In addition, an air hole  250  for allowing external air to be introduced therethrough is formed in the step  230  of the cap main body  200 . The air hole  250  is configured to allow the external air to be introduced into the inverted compression receptacle  100  therethrough when the inverted compression receptacle  100  is elastically restored to the original state thereof. In addition, an upward and downward movement guide wall  220 , which is formed in the shape of a cylinder, is integrally formed at the outside of the large cap part  210 . The upward and downward movement guide wall  220  is configured to guide the upward and downward movement of the upward and downward movement cap  800 . Support shafts  260  are formed inside the upward and downward movement guide wall  220  in a protruding manner such that the support shafts  260  are opposite each other. 
     The content discharge guide  300  is also made of hard synthetic resin. As shown in  FIGS. 3 to 5 , an edge  310  of the content discharge guide  300  is fitted, received, and disposed in the lower end of the large cap part  210  of the cap main body  200  so as to be spaced apart from the upper part of the step  230  of the cap main body  200  by a predetermined distance such that a space is defined therebetween. The content discharge guide  300  includes a discharge guide part  320  having a liquid discharge port  330  formed in the center thereof so as to be recessed concavely and a cylindrical discharge channel  340  protruding from the upper part of the center of the discharge guide part  320  for guiding the discharge of the liquid contents. In addition, the discharge guide part  320  is provided at the outside thereof with an air discharge port  350 , through which the air in the inverted compression receptacle  100  can move to the lower side of the discharge guide part  320  when the inverted compression receptacle  100  is compressed, and with an air introduction port  360 , through which external air that has been introduced through the air hole  250  can be introduced into the inverted compression receptacle  100  when the inverted compression receptacle  100  is restored to the original state thereof. In this embodiment of the present invention, six air introduction ports  360  are formed in the outside of the discharge guide part  320  such that the inverted compression receptacle  100  can be instantly restored to the original state thereof, and two air discharge ports  350  are formed so as to be opposite each other, i.e. to be offset at an angle of 180 degrees, such that air can rapidly move to an air and liquid mixing chamber S, a description of which will follow, when the inverted compression receptacle  100  is compressed. In addition, the liquid discharge port  330  of the discharge guide part  320  is formed so as to branch into a plurality of liquid discharge ports at the center of the discharge guide part  320  in the radial direction thereof such that the liquid contents discharged upward through the discharge tube  130  are distributed and smoothly mixed with air in the air and liquid mixing chamber S (in this embodiment of the present invention, the liquid discharge port  330  branches into two liquid discharge ports that are opposite each other, i.e. are offset at an angle of 180 degrees). 
     As shown in  FIGS. 3 to 6 , the valve housing  400  includes a cylindrical coupling part  440  fitted and coupled into the upper part of the content discharge guide  300  so as to cover the upper part of the content discharge guide  300  such that an air compartment  410 , which communicates with the air discharge ports  350  and the air introduction ports  360 , is defined in the cylindrical coupling part  440 . The cylindrical coupling part  440  is provided in the central region thereof with a content suction port  420 . The cylindrical coupling part  440  is coaxially fitted and coupled into the discharge channel  340  defined in the content discharge guide  300 . The content check valve  430 , which selectively opens and closes the content suction port  420  depending on whether the inverted compression receptacle  100  is compressed, is received and disposed in the coupling part  440  of the valve housing  400 . The content check valve  430  includes a valve body  431  disposed in the coupling part  440  of the valve housing  400  so as to be slidable vertically for opening and closing the content suction port  420 , the upper end of the valve body  431  being formed in a conical shape, and an elastic member  432  (a coil spring in the embodiment of the present invention) for elastically supporting the valve body  431  upward in the coupling part  440 . When the inverted compression receptacle  100  is compressed, therefore, the pressure in the inverted compression receptacle  100  pushes the valve body  431  downward against the elastic supporting force of the elastic member  432 . As a result, the liquid contents move to the discharge guide part  320  of the content discharge guide  300 . In addition, a tube fitting port  450  protrudes from the upper surface of the valve housing  400  so as to communicate with the air compartment  410 . An air tube  500  is fitted and coupled into the tube fitting port  450 . That is, the lower end of the air tube  500  is fitted and coupled into the tube fitting port  450 , and the upper end of the air tube  500  extends toward the upper part of the inverted compression receptacle  100 . Consequently, the upper space in the inverted compression receptacle  100 , in which air remains, and the air compartment  410  communicate with each other through the air tube  500 . 
     The air check valve unit  600  is made of an elastic rubber material (silicone or NBR). As shown in  FIGS. 3 to 5 , the air check valve unit  600  includes a ring-shaped partition wall  610 , having an upper end disposed in tight contact with the lower surface of the bottom of the content discharge guide  300  and a lower end disposed in tight contact with the upper part of the step  230  of the cap main body  200 , for defining the air and liquid mixing chamber S in the foam discharge part  240 , a first check valve part  620  disposed inside the partition wall  610  so as to extend upward toward the central part thereof, an end of the first check valve part  620  being disposed in elastically tight contact with the discharge guide part  320  of the content discharge guide  300 , the first check valve part  620  being configured to allow the air discharged from the inverted compression receptacle  100  through the air discharge ports  350  to move to the air and liquid mixing chamber S when the inverted compression receptacle  100  is compressed, and a second check valve part  630  disposed outside the partition wall  610  so as to extend downward toward the outside, an end of the second check valve part  630  being disposed in elastically tight contact with the outside of the step  230  of the cap main body  200 , the second check valve part  630  being configured to close the air hole  250  when the inverted compression receptacle  100  is compressed and to open the air hole  250  when the inverted compression receptacle  100  is restored to the original state thereof such that air can be introduced through the air hole  250 . 
     As shown in  FIGS. 3 to 5 , the filtration member  700  includes a cylindrical body  710  fitted, received, and disposed in the foam discharge part  240  (the air and liquid mixing chamber S) of the cap main body  200 , the upper and lower parts of the cylindrical body  710  being open, and mesh-shaped filtration nets  720  and  730  provided to cover the upper and lower surfaces of the body  710 . Consequently, the filtration member  700  guides the downward discharge of foam formed as the result of the liquid contents being mixed with air in the air and liquid mixing chamber S while homogenizing the foam. 
     The upward and downward movement cap  800  is configured to guide the discharge of the foam in the foam generator for inverted compression receptacles according to the present invention to the outside and to lock the foam generator for inverted compression receptacles according to the present invention. As shown in  FIGS. 3 to 5 , the upward and downward movement cap  800  includes a cylindrical wall surface  810  having an upper end received in and coupled to the upward and downward movement guide wall  220  of the cap main body  200  so as to be movable upward and downward and a lower surface  820  configured to cover the lower part of the cap main body  200 , the lower surface  820  being provided with a plurality of foam distribution holes  830 , through which the foam that has passed through the filtration member  700  is discharged to the outside in a distributed manner. In addition, the upward and downward movement cap  800  is provided at the center of the lower surface  820  thereof with a cylindrical blocking wall  840  for selectively opening and closing the foam discharge part  240  according to the upward and downward manipulation thereof so as to allow or prevent the communication between the foam discharge part  240  and the foam distribution holes  830 . 
     The upward and downward movement of the upward and downward movement cap  800  is achieved by rotating the upward and downward movement cap  800  in the forward direction and the reverse direction. That is, the upward and downward movement cap  800  is provided at the outside of the wall surface  810  thereof with spiral grooves  850  inclined upward from the lower part thereof for receiving the support shafts  260 . The spiral grooves  850  are formed so as to be opposite each other in a predetermined region (a 90-degree region in the present invention). Consequently, the upward and downward movement cap  800  is moved downward or upward to the regular positions thereof by rotating the upward and downward movement cap  800  in the forward direction or the reverse direction. When the upward and downward movement cap  800  is moved maximally downward as the result of the rotation of the upward and downward movement cap  800  in the forward direction (in the direction indicated by the arrow A in  FIG. 5 ), therefore, the cylindrical blocking wall  840  becomes spaced apart from the upper part of the foam discharge part  240 . As a result, the foam discharge part  240  communicates with the foam distribution holes  830 , whereby the foam can be discharged. On the other hand, when the upward and downward movement cap  800  is moved maximally upward as the result of the rotation of the upward and downward movement cap  800  in the reverse direction (in the direction indicated by the arrow B in  FIG. 5 ), the cylindrical blocking wall  840  completely closes the lower part of the foam discharge part  240 . As a result, the foam is prevented from being discharged (see  FIG. 9 ). 
     Meanwhile, as shown in  FIGS. 3 to 5 , the massage member  900  includes a base  910  fitted and mounted in the lower part of the upward and downward movement cap  800  so as to cover the lower part of the upward and downward movement cap  800 , the base  910  being provided therein with a plurality of communication ports  920 , which communicate with the respective foam distribution holes  830 , and massage bristles  930  implanted over the entire lower surface of the base  910 . The massage bristles  930  are configured to uniformly apply the foam discharged through the communication ports  920  to the skin of a user in the state of being in elastic contact with the skin of the user. 
     Description of Operation and Effects of Foam Generator for Inverted Compression Receptacles According to the Present Invention 
     Next, the operation and effects of the foam generator for inverted compression receptacles according to the present invention will be described with reference to  FIGS. 2 and 7 to 9 . 
     First, as shown in  FIG. 2 , when the foam generator for inverted compression receptacles according to the present invention is in an initial state, the inverted compression receptacle  100  having the liquid contents and the air stored therein is maintained in the original state thereof, and the content check valve  430  keeps the content suction port  420  closed. In addition, the first check valve part  620  of the air check valve unit  600  is disposed in tight contact with the discharge guide part  320  of the content discharge guide  300  due to the elastic restoration force thereof, and the second check valve part  630  of the air check valve unit  600  is also disposed in tight contact with the outside of the step  230  of the cap main body  200  so as to keep the air hole  250  closed using the elastic restoration force thereof. 
     When a user presses the inverted compression receptacle  100  in order to compress the inverted compression receptacle  100  (see the direction indicated by the arrow in  FIG. 7 ) in the state in which the upward and downward movement cap  800  has been moved downward, as shown in  FIG. 7 , pressure is generated in the inverted compression receptacle  100 . As a result, the air and the liquid contents in the inverted compression receptacle  100  are compressed. 
     Consequently, some of the liquid contents stored in the inverted compression receptacle  100  move to the air and liquid mixing chamber S through the liquid discharge ports  330  as the result of opening of the content check valve  430  (see the direction indicated by the solid arrow in  FIG. 7 ). In addition, some of the air in the inverted compression receptacle  100  is compressed, is introduced into the air compartment  410  of the valve housing  400  through the air tube  500 , closes the second check valve part  630 , opens the first check valve part  620 , and then moves to the air and liquid mixing chamber S (see the direction indicated by the dashed arrow in  FIG. 7 ). 
     In the air and liquid mixing chamber S, the compressed air and the liquid contents are mixed with each other to form foam. Since the liquid contents are discharged while being distributed through the liquid discharge ports  330 , the liquid contents can be more smoothly mixed with the air to instantly form foam. The foam is homogenized while passing through the filtration member  700 . The homogenized foam is discharged to the outside via the foam distribution holes  830  in the upward and downward movement cap  800  and the communication ports  920  in the massage member  900 . 
     When the artificial force applied to the inverted compression receptacle  100  is removed, as shown in  FIG. 8 , the inverted compression receptacle  100  is restored to the original state thereof due to the elastic restoration force thereof, whereby negative pressure is generated in the inverted compression receptacle  100 . That is, when negative pressure is generated in the inverted compression receptacle  100  as the result of restoration of the distorted compression receptacle  100  to the original state thereof, the second check valve part  630  of the air check valve unit  600  is instantaneously opened. As a result, external air is introduced into the air compartment  410  of the valve housing  400  through the air hole  250  and the air introduction ports  360 . Subsequently, the air that has been introduced into the air compartment  410  is introduced into the inverted compression receptacle  100  through the air tube  500 . That is, a volume of external air equal to that of the liquid contents that have been discharged from the inverted compression receptacle  100  is introduced into the inverted compression receptacle  100  through the air hole  250  and the air introduction ports  360 , whereby the inverted compression receptacle  100  is maintained in the initial state thereof. During the restoration of the inverted compression receptacle  100 , the first check valve part  620  of the air check valve unit  600  comes into tight contact with the discharge guide part  320  in order to close the air discharge ports  350 . 
     This series of processes may be repeated in order to eject and use the liquid contents stored in the inverted compression receptacle  100  in the form of foam. That is, in the foam generator for inverted compression receptacles according to the present invention, the inverted compression receptacle  100  having the contents stored therein is directly compressed. As a result, the liquid contents are mixed with air due to the pressure in the inverted compression receptacle  100 , and the mixture is directly discharged in the form of foam. In addition, even when the user directly compresses the inverted compression receptacle  100  using one hand, the contents are discharged to the outside in the form of foam, thereby improving user convenience. Furthermore, the user can uniformly apply the foam discharged to the outside to his/her skin or can cleanse his/her skin using the massage member  900  without using his/her hands. In particular, the user can uniformly apply the foam to his/her skin while pushing the massage bristles  930  of the massage member  900  onto his/her skin in the manner of massaging the skin of the user. 
     Meanwhile, when the upward and downward movement cap  800  is rotated by 90 degrees in the reverse direction (in the direction indicted by the arrow B in  FIG. 9 ), as shown in  FIG. 9 , the upward and downward movement cap  800  is moved upward, whereby the cylindrical blocking wall  840  is received in the foam discharge part  240  while coming into tight contact with the foam discharge part  240  in order to close the foam discharge part  240 . {Since the support shafts  260  are received in and coupled to the respective spiral grooves  850 , as previously described, the upward and downward movement cap  800  is moved upward and downward only to the regular positions thereof by rotating the upward and downward movement cap  800  in the forward direction and the reverse direction.} In the state in which the upward and downward movement cap  800  has been moved upward to close the foam discharge part  240 , as described above, foam (contents and air) can be completely prevented from being discharged even when the inverted compression receptacle  100  is pressed such that the inverted compression receptacle  100  is compressed, whereby the inverted compression receptacle  100  remains locked. That is, the discharge of foam is guided and the inverted compression receptacle  100  is locked through the upward and downward movement cap  800  fastened to the inverted compression receptacle  100  in a rotation and upward and downward movement manner, whereby it is possible to more stably use the product and to prevent the leakage of liquid from the product during the distribution of the product. 
     INDUSTRIAL APPLICABILITY 
     The present invention is widely applicable to the field of a foam generator for inverted compression receptacles that is capable of mixing contents with air and discharging the mixture in the form of foam when an inverted compression receptacle is directly compressed.