Patent Publication Number: US-9421146-B2

Title: Cosmetic device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2013-236118, filed on Nov. 14, 2013, the entire contents of which are incorporated herein by reference. 
     FIELD 
     The present invention relates to a cosmetic device that generates bubbles from a liquid foaming agent and air. 
     BACKGROUND 
     Japanese Laid-Open Patent Publication Nos. 2008-296965 and 58-22555 disclose an example of a conventional cosmetic device. The cosmetic device of Publication No. 2008-296965 includes a container, a pump, and a mesh body. The pump mixes a liquid foaming agent stored in the container with air. When the gas and liquid mixture passes through the mesh body, bubbles are generated and sent to a brush. A user can supply the bubbles discharged from the brush of the cosmetic device to a target site such as a skin. 
     The cosmetic device described in Publication No. 58-22555 includes a brush and a motor. The brush rotates on the basis of driving of a motor. In the cosmetic device, the user is able to clean a target site by bringing the brush into contact with the target site such as a skin. 
     By using a driving source such as a motor described in Publication No. 58-22555, it is possible to electrically drive a manual drive unit such as a pump described in Publication No. 2008-296965. 
     SUMMARY 
     In the liquid foaming agent, there is unevenness in a degree of mixing between liquid and a foaming agent. In this case, unevenness occurs in the size of the bubbles generated from the liquid foaming agent, and the diameters of the bubbles are relatively large. When such bubbles are supplied to the skin from the cosmetic device, a desired cosmetic effect may not be obtained. 
     Furthermore, the degree of mixing between the liquid foaming agent and air is affected by the concentration of the foaming agent in the liquid foaming agent. If the concentration of the foaming agent is high, the liquid foaming agent and air are less likely to be uniformly mixed with each other. Even in this case, a desired cosmetic effect may not be obtained. 
     A cosmetic device according to one aspect includes a bubble generator configured to generate bubbles, a cosmetic unit configured to exert the cosmetic effect on the skin, and a motor configured to drive at least the cosmetic unit. The bubble generator includes an agitating and mixing mechanism configured to agitate a liquid foaming agent and mix the agitated liquid foaming agent with air. 
     Other aspects and advantages of the present invention will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention, together with objects and advantages thereof, may best be understood by reference to the following description of the presently preferred embodiments together with the accompanying drawings in which: 
         FIG. 1  is a front view of a cosmetic device according to a first embodiment; 
         FIG. 2  is a right side view of the cosmetic device illustrated in  FIG. 1 ; 
         FIG. 3  is a cross-sectional view taken along a line Z 3  to Z 3  of  FIG. 1 ; 
         FIG. 4  is a cross-sectional view taken along a line Z 4  to Z 4  of  FIG. 1 ; 
         FIG. 5  is a cross-sectional view taken along a line Z 5  to Z 5  of  FIG. 2 ; 
         FIG. 6  is a cross-sectional view taken along a line Z 6  to Z 6  of  FIG. 2 ; 
         FIGS. 7A and 7B  are schematic perspective views of a drive unit according to the first embodiment; 
         FIGS. 8A and 8B  are schematic plan views of a head block in the first embodiment; 
         FIG. 9  is an exploded perspective view of the cosmetic device illustrated in  FIG. 1 ; 
         FIG. 10A  is a front view of a cap illustrated in  FIG. 9 ; 
         FIG. 10B  is a cross-sectional view taken along a line Z 10  to Z 10  of  FIG. 10A ; 
         FIG. 11  is a front view of a head block in a second embodiment; 
         FIG. 12  is a right side view of the head block illustrated in  FIG. 11 ; 
         FIG. 13  is a cross-sectional view taken along a line Z 13  to Z 13  of  FIG. 11 ; 
         FIG. 14  is a cross-sectional view taken along a line Z 14  to Z 14  of  FIG. 11 ; 
         FIG. 15  is a cross-sectional view taken along a line Z 15  to Z 15  of  FIG. 11 ; 
         FIGS. 16A to 16C  are schematic perspective views of a drive unit according to a second embodiment; 
         FIG. 17  is a front view of a head block according to a third embodiment; 
         FIG. 18  is a right side view of the head block illustrated in  FIG. 17 ; 
         FIG. 19  is a cross-sectional view taken along a line Z 19  to Z 19  of  FIG. 17 ; 
         FIG. 20  is a perspective view illustrating a hair depilation unit of a drive unit according to the third embodiment; 
         FIG. 21  is a front view of a head block in a fourth embodiment; 
         FIG. 22  is a right side view of the head block illustrated in  FIG. 21 ; 
         FIG. 23  is a cross-sectional view taken along a line Z 23  to Z 23  of  FIG. 21 ; 
         FIG. 24  is a perspective view illustrating a hair removal unit of the drive unit in a fourth embodiment; 
         FIG. 25  is a plan view of a cosmetic device according to a fifth embodiment; 
         FIG. 26  is a front view of the cosmetic device illustrated in  FIG. 25 ; 
         FIG. 27  is a cross-sectional view taken along a line Z 27  to Z 27  of  FIG. 25 ; 
         FIG. 28  is a perspective view of the drive unit in the fifth embodiment; and 
         FIGS. 29 to 32  are exploded perspective views of cosmetic devices of various modified examples. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     First, characteristics of a cosmetic device according to this disclosure will be described. 
     In one aspect, the cosmetic device includes a bubble generator configured to generate bubbles, a cosmetic unit configured to exert a cosmetic effect on a skin, and a motor configured to drive at least the cosmetic unit. The bubble generator includes an agitating and mixing mechanism configured to agitate a liquid foaming agent and mix the agitated liquid foaming agent with air. 
     According to the cosmetic device, the agitating and mixing mechanism mechanically agitates the liquid foaming agent. Thus, the mixing between the liquid foaming agent and air is promoted. Thus, even when the liquid and the foaming agent are not sufficiently mixed with each other, or even when the concentration of the foaming agent is high, it is possible to suppress the unevenness of the size of the bubbles and to generate the fine bubbles. 
     In the cosmetic device, the agitating and mixing mechanism may preferably include at least two rotors. Furthermore, at least the two rotors may preferably include first and second rotors configured to rotate in opposite directions to each other. 
     According to the cosmetic device, the flow of the liquid foaming agent formed by the rotation of the first rotor and the flow of the liquid foaming agent formed by the rotation of the second rotor interfere with each other. Thus, a turbulent flow is generated by agitation of the liquid foaming agent, thereby being able to promote the mixing between the liquid foaming agent and air by the turbulent air. Consequently, it is possible to enhance the effect of suppressing the unevenness of the size of the bubbles to generate the fine bubbles. 
     In the cosmetic device, the agitation and mixing mechanism may preferably include at least one arm that protrudes from at least one of the first and second rotors. 
     According to the cosmetic device, the rotor and the arm agitate the liquid foaming agent. This increases the area of an agitating portion coming into contact with the liquid foaming agent. Accordingly, it is possible to promote the mixing between the liquid foaming agent and air. 
     Here, a peripheral speed of a distal end portion of the arm is greater than a peripheral speed of a basal end portion of the arm (that is, the surface of the rotor). By providing the arm, the agitation capacity at a position with a larger peripheral speed is enhanced. This enables the mixing between the liquid foaming agent and air to be further promoted. Accordingly, it is possible to enhance the effect of suppressing the unevenness of the size of the bubbles to generate the fine bubbles. 
     In the cosmetic device, each of the first and second rotors may preferably include at least one arm. Furthermore, in this case, it is preferred that a rotational orbit of the arm protruding from the first rotor partially overlaps a rotational orbit of the arm protruding from the second rotor. 
     According to the cosmetic device, the flows of the liquid foaming agent agitated by the first and second rotors interfere with each other. Thus, the turbulent flow is easily formed, and it is possible to promote the mixing between the liquid foaming agent and air. Accordingly, it is possible to enhance the effect of suppressing the unevenness of the size of the bubbles to generate the fine bubbles. 
     In the cosmetic device, the agitating and mixing mechanism may preferably include a pillar that is coupled to the arm and bent with respect to the arm. 
     According to the cosmetic device, the rotor, the arm, and the pillar agitate the liquid foaming agent. This increases the area of the agitating portion coming into contact with the liquid foaming agent. Consequently, it is possible to promote the mixing between the liquid foaming agent and air. Accordingly, it is possible to enhance the effect of suppressing the unevenness of the size of the bubbles to generate the fine bubbles. 
     In the cosmetic device, the pillar may preferably have a shape tapered toward a rotational direction of the corresponding rotor. 
     According to the cosmetic device, the pillar rotates to cut the liquid foaming agent with the rotation of the rotor. Thus, the turbulent flow easily occurs, and it is possible to promote the mixing between the liquid foaming agent and air. Accordingly, it is possible to enhance the effect of suppressing the unevenness of the size of the bubbles to generate the fine bubbles. 
     In the cosmetic device, the bubble generator includes a discharge port configured to discharge the bubbles. In this case, it is preferred that the discharge port be arranged so that a center of the discharge port is located at a position which is offset from a line segment connecting the rotational center axes of the first and second rotors and at which the liquid foaming agent agitated by the first and second rotors is converged. 
     According to this structure, the flow of the liquid foaming agent strongly interferes at the center of the discharge port. Thus, the bubbles are easily formed at the center of the discharge port. Consequently, the bubbles may be more easily and continuously discharged from the discharge port. 
     In the cosmetic device, the bubble generator includes a suction port configured to suck air. In this case, it is preferred that the suction port is arranged so that a center of the suction port is located at a position which is offset from a line segment connecting the rotational center axes of the first and second rotors and at which the liquid foaming agent agitated by the first and second rotors is diffused. 
     According to this structure, the flow of the liquid foaming agent does not interfere at the center of the suction port. Thus, much bubble is not generated. Therefore, it is reduced that the flow of air passing through the suction port is disturbed by the bubbles. Consequently, the shortage of the air to be mixed with the liquid foaming agent is reduced. Accordingly, it is possible to enhance the effect of suppressing the unevenness of the size of the bubbles to generate the fine bubbles. 
     First Embodiment 
     An external structure of a cosmetic device  1  will be described referring to  FIGS. 1 and 2 . 
     The cosmetic device  1  has a structure that is suitable for suppressing unevenness of the size of the bubbles to generate a large amount of fine bubbles. Bubbles generated by the cosmetic device  1  exert a cosmetic effect on the skin. The cosmetic device  1  includes a plurality of constituent elements capable of being functionally coupled to one another. The cosmetic device  1  includes a main body block  10 , a head block  100 , and a head cap  20  (see  FIG. 9 ). The head block  100  has an attachment structure that is attachable and detachable to and from the main body block  10 . The head block  100  has a shape that is curved toward a distal end portion of the head block  100  from the main body block  10 . 
     An internal structure of the cosmetic device  1  will be described referring to  FIGS. 3 to 5 . As illustrated in  FIG. 3 , the main body block  10  includes a housing  11 , a cap  12 , a motor  13 , a joint  14  (see  FIG. 4 ), a rechargeable battery  15  (see  FIG. 5 ), a light source  16 , and a light distribution lens  17 . The motor  13 , the rechargeable battery  15 , and the light source  16  are disposed in the internal space of the housing  11 . The housing  11  has a handheld shape. The housing  11  has a waterproof structure that prevents liquid such as water from entering the interior of the housing  11 . 
     As an example, the housing  11  and the cap  12  are made of an ABS resin. The top of the housing  11  is open. The cap  12  is fitted to the opening of the top of the housing  11 . 
     The light source  16  has a function of irradiating the front of a brush unit  110 . An example of the light source  16  is an LED lamp. The light distribution lens  17  has a function of guiding the light output from the light source  16  to the front of the brush unit  110 . As an example, the light distribution lens  17  is made of a material mainly composed of glass or a transparent resin. The light distribution lens  17  is fitted between the housing  11  and the cap  12 . 
     As illustrated in  FIG. 4 , the joint  14  is fixed to an output shaft  13 A of the motor  13 . For example, the joint  14  has a hexagonal shape. A part of the joint  14  protrudes from the housing  11  through the hole of the cap  12 . 
     An operation structure of the cosmetic device  1  will be described referring to  FIGS. 1 and 6 . A power switch  11 A and a release button  11 B are disposed in the housing  11 . These buttons  11 A and  11 B are provided as a man-machine interface. 
     The power switch  11 A is used to start the operation of the head block  100 . When the power switch  11 A is operated, the motor  13  is driven (see  FIG. 3 ). When the motor  13  is driven, the light source  16  (see  FIG. 3 ) outputs the light. The light output from the light source  16  irradiates an area around the head block  100  via the light distribution lens  17 . 
     The release button  11 B is used when separating the main body block  10  from the head block  100 . The coupling between the main body block  10  and the head block  100  is released by operation of the release button  11 B. 
     A structure of the head block  100  will be described referring to  FIGS. 3, 7A, and 7B . The head block  100  is configured to be able to discharge the bubbles towards the skin and to exert the cosmetic effect on the skin. The head block  100  includes a head housing  101 , a brush unit  110 , and a bubble generator  120 . 
       FIGS. 7A and 7B  illustrate the bubble generator  120 . The bubble generator  120  is configured to generate bubbles by mixing the liquid foaming agent with air, and to discharge the bubbles outward from the head block  100  (see  FIG. 1 ). The liquid foaming agent is a mixture of the foaming agent and the liquid. An example of the liquid is water. An example of the foaming agent is soap or shampoo. 
     The bubble generator  120  is stored in the head housing  101  (see  FIG. 3 ). The bubble generator  120  includes an agitating and mixing mechanism  130 , a container  170  (see  FIG. 6 ), and a fixed plate  180 . 
     The container  170  stores the liquid foaming agent. The container  170  is, for example, made of a polyacetal resin. The container  170  is disposed inside the head housing  101  and is fixed to the head housing  101 . 
     As illustrated in  FIGS. 6 and 7B , a discharge port  181  is formed in the container  170  and protrudes from the fixed plate  180 . The discharge port  181  has, for example, a cylindrical shape. The discharge port  181  is open toward the brush unit  110 . The discharge port  181  allows the internal space of the container  170  to communicate with the external space of the bubble generator  120 . When the cosmetic device  1  is used, the liquid foaming agent is supplied to the container  170  via the discharge port  181 . The bubble generator  120  generates the bubbles within the container  170 . The bubbles are supplied to the brush unit  110  through the discharge port  181 . 
     The agitating and mixing mechanism  130  is configured to generate the bubbles by mixing the liquid foaming agent with the air, while agitating the liquid foaming agent. As an example, the agitating and mixing mechanism  130  includes a first rotor  131 , a second rotor  132 , and a drive unit  140 . 
     A structure of the drive unit  140  will be described referring to  FIGS. 7A and 7B . The drive unit  140  drives the brush unit  110 , the first rotor  131 , and the second rotor  132 , based on the driving force of the motor  13 . As an example, the drive unit  140  includes a swinging plate  112 , a plurality of gears  150 A, a plurality of support shafts  160 , and an eccentric cam  164 . The plurality of support shafts  160  include a first support shaft  161 , a second support shaft  162 , and a third support shaft  163 . 
     The brush unit  110  is an example of the cosmetic unit. The brush unit  110  serves to exert the cosmetic effect on the skin, by applying the soft physical stimulation to the skin. In this example, the brush unit  110  includes, for example, one brush  110 A (see  FIG. 1 ). The brush unit  110  is fixed to the swinging plate  112 . 
     As illustrated in  FIG. 7B , the swinging plate  112  is coupled to the fixed plate  180 . The discharge port  181  is fitted to the hole at the center of the swinging plate  112 . The swinging plate  112  is configured to swing in a circumferential direction about the discharge port  181  with respect to the fixed plate  180 . 
     The plurality of gears  150 A include a rotary drive gear  151 , a spur gear  152 , a crown gear  153 , a rotation transmission gear  154 , a first rotary gear  155 , a rotation change gear  156 , and a second rotary gear  157 . The rotation transmission gear  154  includes two gears with different diameters, that is, a first rotation transmission gear  154 A, and a second rotation transmission gear  154 B. 
     The plurality of gears  150 A are housed in a gear box  150  (see  FIG. 3 ). For example, the gear box  150  is made of resin. A packing  150 B ( FIG. 3 ) is disposed between the gearbox  150  and the container  170 . The packing  150 B prevents the liquid foaming agent stored in the internal space of the container  170  from flowing into the interior of the gearbox  150 . 
     The coupling  151 A is coupled to the rotary drive gear  151 . The coupling  151 A protrudes from the head housing  101  via a hole of the head housing  101  (see  FIG. 4 ). The coupling  151 A may be fitted to the joint  14 . By fitting the coupling  151 A to the joint  14 , the head block  100  is fixed to the main body block  10 . In this state, the driving force of the motor  13  is transmitted to the rotary drive gear  151  via the joint  14  and the coupling  151 A. 
     The rotary drive gear  151  is meshed with the spur gear  152 . The spur gear  152  is meshed with the crown gear  153 . The crown gear  153  is meshed with the first rotation transmission gear  154 A. The first rotation transmission gear  154 A and the second rotation transmission gear  154 B are fixed to the third support shaft  163 . The second rotation transmission gear  154 B is meshed with the first rotary gear  155  and the rotation change gear  156 . The rotation change gear  156  is meshed with the second rotary gear  157 . 
     The first rotary gear  155  is coupled to the first support shaft  161 . The first support shaft  161  is coupled to the first rotor  131 . The first rotor  131  and the first support shaft  161  have the same axis. The second rotary gear  157  is coupled to the second support shaft  162 . The second support shaft  162  is coupled to the second rotor  132 . The second rotor  132  and the second support shaft  162  have the same axis. 
     The rotation of the rotary drive gear  151  is decelerated via the spur gear  152 , the crown gear  153 , the rotation transmission gear  154 , and the first rotary gear  155 . The rotation of the first rotary gear  155  is transmitted to the first rotor  131  via the first support shaft  161 . 
     The rotation of the rotary drive gear  151  is decelerated via the spur gear  152 , the crown gear  153 , the rotation transmission gear  154 , the rotation change gear  156 , and the second rotary gear  157 . The rotation of the second rotary gear  157  is transmitted to the second rotor  132  via the second support shaft  162 . 
     Thus, the rotation of the rotary drive gear  151  is transmitted to the first rotor  131  and the second rotor  132 . The first rotor  131  and the second rotor  132  rotate in the opposite directions to each other. Each of the reduction gear ratio between the rotary drive gear  151  and the first rotor  131  and the reduction gear ratio between the rotary drive gear  151  and the second rotor  132  is preferably included within the range of 1.6 to 6.4. For example, each of the reduction gear ratio is set to 3.2. 
     The rotational speed and the torque of the first rotor  131  may be adjusted by the reduction gear ratio between the rotary drive gear  151  and the first rotor  131 . Similarly, the rotational speed and the torque of the second rotor  132  may be adjusted by the reduction gear ratio between the rotary drive gear  151  and the second rotor  132 . 
     The rotation transmission gear  154  is coupled to the third support shaft  163 . The third support shaft  163  is coupled to the eccentric cam  164 . The eccentric cam  164  includes a convex portion  164 A which is eccentric with respect to the rotational center axis of the third support shaft  163 . The convex portion  164 A is inserted into an elongated hole  114  of the swinging plate  112  through the fixed plate  180 . 
     The third support shaft  163  and the eccentric cam  164  rotate along with the rotation of the rotation transmission gear  154 . When the eccentric cam  164  rotates, the convex portion  164 A reciprocates (eccentric motion) in the elongated hole  114  of the swinging plate  112  to swing the swinging plate  112  around the discharge port  181 . The brush unit  110  is fixed to the swinging plate  112 . Therefore, the brush unit  110  swings integrally with the swinging plate  112 . 
     In this manner, the rotation of the rotary drive gear  151  is transmitted to the brush  110 A. The reduction gear ratio between the rotary drive gear  151  and the eccentric cam  164  is preferably included within the range of 1.2 to 4.8. For example, this reduction gear ratio is set to 2.4. The reduction gear ratio between the rotary drive gear  151  and the eccentric cam  164  is substantially the same as the reduction gear ratio between the rotary drive gear  151  and the rotation transmission gear  154 . 
     The structure of each rotor  131  and  132  will be described referring to  FIGS. 8A and 8B . The first and second rotors  131  and  132  are disposed in the internal space of the container  170 . Each of the rotors  131  and  132  is rotatably provided in the container  170 . Each of the rotors  131  and  132  agitates the liquid foaming agent stored in the container  170 . 
     A plurality of arms  131 A are coupled to the first rotor  131 . The arms  131 A protrude outward in the radial direction from the outer periphery of the first rotor  131 . The arms  131 A are able to enhance the degree of agitating the liquid foaming agent and the air. 
     In other words, in the plan view of the first rotor  131 , the arms  131 A protrude generally radially from the rotational center axis of the first rotor  131 . The basal end portion of each arm  131 A coupled to the first rotor  131  has a constant interval from the basal end portion of the arm  131 A that is adjacent in the circumferential direction. An interval between the basal end portions of the two adjacent arms  131 A is substantially the same. Similarly, a plurality of arms  132 A are coupled to the second rotor  132 . The arms  132 A have the same structures as those of the plurality of arms  131 A. 
     A pillar  131 B is coupled to the distal end portion of each arm  131 A. The pillar  131 B protrudes toward the axial direction of the first rotor  131  from the distal end portion of the corresponding arm  131 A. When viewed in a plan view, that is, in the axial direction of the first rotor  131 , the pillar  131 B has a shape that tapers toward the rotational direction of the first rotor  131 . The pillar  131 B serves to enhance the degree of agitating the liquid foaming agent and the air. Similarly, the pillar  132 B is coupled to the distal end portion of each arm  132 A. The pillar  132 B has a structure similar to that of the pillar  131 B. 
     The structure of the fixed plate  180  will be described referring to  FIGS. 8A and 8B . For example, the fixed plate  180  is made of a polyacetal resin. The fixed plate  180  is fitted to the head housing  101 . The opening of the container  170  is covered with the fixed plate  180 . A bearing  184  is disposed around the discharge port  181  at the position between the swinging plate  112  and the fixed plate  180 . The bearing  184  is made of, for example, a metal. 
     The center of the discharge port  181  is located at a position which is offset from a line segment LX connecting the rotational center axis of the first rotor  131  and the rotational center axis of the second rotor  132  and at which the liquid foaming agent agitated by the first and second rotors  131  and  132  is converged. At this position, as compared to other positions of the container  170 , the flow of the liquid foaming agent caused by the rotation of the first rotor  131  strongly interferes with the flow of the liquid foaming agent caused by the rotation of the second rotor  132 . Thus, bubbles are easily generated as compared to other positions of the container  170 . 
     The two suction ports  182  are formed in the fixed plate  180 . The suction ports  182  pass through the fixed plate  180 . The suction ports  182  allow the internal space of the container  170  to communicate with the external space of the bubble generator  120 . The suction ports  182  serve as an air suction port that sucks air into the container  170 . 
     The center of each suction port  182  is located at a position which is offset from the line segment LX and at which the liquid foaming agent agitated by the first and second rotors  131  and  132  is diffused. At this position, as compared to other positions of the container  170 , the flow of the liquid foaming agent caused by the rotation of the first rotor  131  is hard to interfere with the flow of the liquid foaming agent caused by the rotation of the second rotor  132 . Thus, the bubbles are hard to generate as compared to other positions of the container  170 . 
     Each suction port  182  may also serve as a discharge port that discharges the excessive liquid foaming agent to the outside. When the liquid foaming agent exceeds a maximum storage amount of the container  170 , the excessive liquid foaming agent is discharged to the outside through each suction port  182 . The maximum storage amount is a storage amount that is suitable for generating a preferred amount of bubbles. 
     In  FIGS. 8A and 8B , a virtual circle CA representatively illustrates one rotational orbit of the arm  131 A. A virtual circle CB representatively illustrates one rotational orbit of the arm  132 A. As illustrated by the virtual circles CA and CB, the rotational orbit of the arm  131 A and the rotational orbit of the arm  132 A partially overlap each other. 
     The pillar  131 B coupled to the arm  131 A faces an inner wall of the container  170  via the interval. The length of the interval is constant within a predetermined range of the first rotor  131  in the circumferential direction. Similarly, the pillar  132 B coupled to the arm  132 A faces the inner wall of the container  170  via the interval. The length of the interval is constant within a predetermined range of the second rotor  132  in the circumferential direction. 
     A plurality of crosspieces  183  are formed in the discharge port  181 . The crosspieces  183  prevent the foreign objects or fingers from entering the container  170  from the outside of the discharge port  181 . For example, the number of the crosspieces  183  is three. 
       FIG. 9  illustrates an exploded structure of the cosmetic device  1 . Three hooks  111  are formed in the brush unit  110 . Convex portions  111 A are formed at both ends of each hook  111 . The convex portions  111 A reinforce the hook  111 . 
     Three hook portions  113  are formed on the swinging plate  112 . Each hook  111  is hooked to any one of the hook portions  113 . Thus, the brush unit  110  and the swinging plate  112  are coupled to each other. The brush unit  110  and the swinging plate  112  can be separated from each other as needed. 
     A structure of the head cap  20  will be described referring to  FIGS. 10A and 10B . The head cap  20  is formed to be attachable and detachably to and from the brush unit  110 . A spout  21 , a foaming agent mark  22 , and a water mark  23  are formed in the head cap  20 . The spout  21  supplies the liquid foaming agent stored in the head cap  20  to the discharge port  181 . 
     The foaming agent mark  22  is used to meter the foaming agent. The water mark  23  is used to meter the water. By mixing the foaming agent of an amount defined by the foaming agent mark  22  with water of an amount defined by the water mark  23 , the unevenness of size of the bubbles is suppressed, and the liquid foaming agent suitable for generation of the fine bubbles is obtained. 
     An operation of the cosmetic device  1  will be described referring to  FIGS. 3, 7A, 7B, 10, and 10B . 
     The cosmetic device  1  is used, for example, by the following procedure. First, the foaming agent and water are supplied to the head cap  20 . Next, the liquid foaming agent is supplied to the container  170  from the head cap  20  via the discharge port  181 . Next, the power switch  11 A is turned on. Thus, the motor  13  is driven, and the light source  16  outputs the light. 
     Driving force of the motor  13  is transmitted to the plurality of gears  150 A of the drive unit  140 . As a result, the agitating and mixing mechanism  130  and the brush unit  110  are driven. More specifically, the first rotor  131  and the second rotor  132  rotate, and the brush unit  110  swings about the discharge port  181  in the circumferential direction. 
     When the first rotor  131  and the second rotor  132  rotate, the liquid foaming agent stored in the container  170  is mechanically agitated. Thus, to mix the liquid foaming agent and air is promoted, and the bubbles are generated. The bubbles are discharged to the outside of the brush unit  110  from the discharge port  181 . 
     When the motor  13  is driven, the brush  110 A coming in contact with the skin exerts the soft physical stimulation to the skin. At this time, since the bubbles supplied from the discharge port  181  has been supplied to the skin and the brush  110 A, the cosmetic effect on the skin is further enhanced. 
     The cosmetic device  1  has the following advantages. 
     (1) The cosmetic device  1  has the agitating and mixing mechanism  130 . Thus, the liquid foaming agent supplied to the container  170  is mechanically agitated to promote the mixing between the liquid foaming agent and air. Accordingly, even when the liquid and the foaming agent are not sufficiently mixed with each other, or even when the concentration of the foaming agent is high, it is possible to suppress the unevenness of the size of the bubbles to suitably generate the fine bubbles. 
     (2) The first rotor  131  and the second rotor  132  rotate in the opposite directions to each other. Thus, flow of the liquid foaming agent caused by the rotation of the first rotor  131  interferes with the flow of the liquid foaming agent caused by the rotation of the second rotor  132 . Therefore, it is possible to generate the turbulent flow in the container  170 , thereby to further promote the mixing between the liquid foaming agent and air. Accordingly, it is possible to enhance the effect of suppressing the unevenness of the size of the bubbles to generate the fine bubbles. 
     (3) The arms  131 A protrude outward in the radial direction from the outer periphery of the rotor  131 . Similarly, the arms  132 A protrude outward in the radial direction from the outer periphery of the rotor  131 . These arms  131 A and  132 A increase an area of the agitating portion coming into contact with the liquid foaming agent so as to increase the agitation capability. Accordingly, it is possible to further promote the mixing between the liquid foaming agent and air. 
     In addition, the peripheral speed of the distal end portion of the respective arms  131 A and  132 A is greater than the peripheral speed of the basal end portion of the respective arms  131 A and  132 A (that is, the surface of each of the rotors  131  and  132 ). Therefore, in the vicinity of the distal end portion of the arms  131 A and  132 A having the higher peripheral speed, that is, at a position away from the rotors  131  and  132 , the agitation capability is enhanced. As a result, the mixing between the liquid foaming agent and air is further promoted. Accordingly, it is possible to enhance the effect of suppressing the unevenness of the size of the bubbles to generate the fine bubbles. 
     (4) The rotational orbit of the virtual circle CA partially overlaps the rotational orbit of the virtual circle CB. That is, the rotational orbit of each arm  131 A protruding from the rotor  131  partially overlaps the rotational orbit of each arm  132 A protruding from the rotor  132 . As a result, in the vicinity of the position in which the two rotational orbits overlap each other, the flow of liquid caused by the rotation of the arm  131 A interferes with the flow of the liquid caused by the rotation of the arm  132 A. Therefore, it is possible to generate the turbulent flow in the container  170 , thereby to further promote the mixing between the liquid foaming agent and air. Accordingly, it is possible to enhance the effect of suppressing the unevenness of the size of the bubbles to generate the fine bubbles. 
     (5) The pillar  131 B protrudes toward the axial direction of the rotor  131  from the distal end portion of the arm  131 A. Similarly, the pillar  132 B protrudes toward the axial direction of the rotor  132  from the distal end portion of the arm  132 A. The pillars  131 B and  132 B increase an area of the agitating member coming into contact with the liquid foaming agent to enhance the agitation capability. Thus, it is possible to further promote the mixing between the liquid foaming agent and air. Furthermore, in the vicinity of the distal end portion of the respective arms  131 A and  132 A having the higher peripheral speed, that is, at a position away from the respective rotors  131  and  132 , the capability of agitating the liquid foaming agent is enhanced. Accordingly, it is possible to enhance the effect of suppressing the unevenness of the size of the bubbles to generate the fine bubbles. 
     (6) Each pillar  131 B tapers toward the rotational direction of the rotor  131 . Similarly, each pillar  132 B tapers toward the rotational direction of the rotor  132 . Therefore, each of the pillars  131 B and  132 B rotates to cut the liquid foaming agent. The inventors have confirmed that such an agitating mechanism promotes the mixing between the liquid foaming agent and air. It is believed that the turbulent flow is enhanced by the liquid foaming agent being agitated so as to be cut to each of the pillars  131 B and  132 B. Accordingly, it is possible to enhance the effect of suppressing the unevenness of the size of the bubbles to generate the fine bubbles. 
     (7) The center of the discharge port  181  is located at a position which is offset from the line segment LX and at which the liquid foaming agent agitated by the first and second rotors  131  and  132  is converged. At this position, the flow of the liquid foaming agent caused by the rotation of the first rotor  131  strongly interferes with the flow of the liquid foaming agent caused by the rotation of the second rotor  132 . Thus, it is possible to efficiently generate the bubbles in the discharge port  181  compared to other positions. As a result, the bubbles generated by agitating the liquid foaming agent are gathered to the discharge port  181  and are continuously discharged from the discharge port  181 . 
     (8) The center of the suction port  182  is located at a position which is offset from the line segment LX and at which the liquid foaming agent agitated by the first and second rotors  131  and  132  is diffused. At this position, as compared to the position at which the center of the discharge port  181  is located, the flow of the liquid foaming agent caused by the rotation of the first rotor  131  is hard to interfere with the flow of the liquid foaming agent caused by the rotation of the second rotor  132 . Therefore, the bubbles are relatively hard to be generated in the suction port  182 . In addition, the bubbles are hard to reach the suction port  182 . This reduces the concern that the flow of air passing through the suction port  182  is blocked by the bubble, and air mixed with the liquid foaming agent is insufficient. Accordingly, it is possible to enhance the effect of suppressing the unevenness of the size of the bubbles to generate the fine bubbles. 
     (9) The head cap  20  can be attached to the brush unit  110 . Thus, it is possible to suppress the deformation of the brush  110 A when storing or carrying the cosmetic device  1 . 
     (10) The head cap  20  has a foaming agent mark  22  and a water mark  23 . By injecting a foaming agent and water into the container  170  according to the marks  22  and  23 , it is possible to suppress the unevenness of dimension of the bubbles, and to easily generate the liquid foaming agent at the foaming agent concentration that is suitable for generation of the fine bubbles. Furthermore, the head cap  20  may be used as a measuring cup. Thus, there is no need to separately prepare the measuring cup. 
     (11) The brush unit  110 , the first rotor  131 , and the second rotor  132  are driven by a single motor  13 . Thus, it is possible to easily miniaturize the cosmetic device  1 , compared to a structure in which a plurality of motors are mounted. 
     (12) The head block  100  has an attachment structure that is attachable and detachable to and from the main body block  10 . Thus, it is possible to replace the brush unit  110  with the different types of cosmetic units. 
     (13) The brush unit  110  can be separated from the swinging plate  112 . Thus, the cleaning of the brush unit  110  is easy. Also, when the brush  110 A is consumed, it is possible to replace only the brush unit  110  with a new brush unit. 
     Second Embodiment 
     An external structure of a cosmetic device  2  of a second embodiment will be described referring to  FIGS. 11 and 12 . In the cosmetic device  1  of the first embodiment, the head block  100  including one brush  110 A was provided. Meanwhile, in the cosmetic device  2  of the second embodiment, a head block  200  including three brushes is provided in place of the head block  100 . 
     An internal structure of the head block  200  will be described referring to  FIGS. 13 to 15 . For example, the head block  200  includes a head housing  201 , a brush unit  210 , and a bubble generator  220  (see  FIGS. 16A to 16C ). 
     The brush unit  210  is an example of the cosmetic unit. The brush unit  210  serves to exert a cosmetic effect on the skin by applying the soft physical stimulation to the skin. In this example, the brush unit  210  includes a first brush  210 A, a second brush  210 B, a third brush  210 C, three cylinders  211 , three first elastic elements  212 , (see  FIG. 15 , only two are illustrated in  FIG. 15 ), and an elastic element group  270 . 
     As illustrated in  FIG. 14 , the elastic element group  270  includes a second elastic element  271 , a third elastic element  272 , and a fourth elastic element  273  (see  FIG. 13 ). The second elastic element  271  is disposed between the first brush  210 A and the first rotary gear  254 . The third elastic element  272  is disposed between the second brush  210 B and the second rotary gear  256 . The fourth elastic element  273  is disposed between the third brush  210 C (see  FIG. 13 ) and the third rotary gear  257  (see  FIG. 13 ). The first to third brushes  210 A to  210 C are provided to be able to float within a range of a predetermined distance in an axial direction of the brush with respect to the head housing  201 , by each of the second to fourth elastic elements  271  to  273 . 
     As illustrated in  FIG. 15 , the three cylinders  211  are supported by the head housing  201 . Each cylinder  211  protrudes toward the axial direction of the brush from the leading end side of the head housing  201 . Each of the brushes  210 A to  210 C is disposed inside the corresponding cylinder  211 . Each of the three first elastic elements  212  is disposed among the three cylinders  211  and the head housing  201 . Each cylinder  211  is provided to be able to float within a range of a predetermined distance in the axial direction with respect to the brush head housing  201 , by the corresponding first elastic element  212 . That is, each cylinder  211  is provided to be able to float within the range of the predetermined distance in the axial direction of the brush, independently from each of the brushes  210 A to  210 C. 
       FIGS. 16A to 16C  illustrate a bubble generator  220 . The bubble generator  220  is housed within the head housing  201  (see  FIG. 14 ). The bubble generator  220  includes an agitating and mixing mechanism  230  and a container  280  (see  FIG. 14 ). The container  280  is disposed in the head housing  201  and is fixed to the head housing  201 . 
     A discharge port  281  (see  FIG. 11 ) is formed in the container  280 . The discharge port  281  is open toward the brush unit  210  (see  FIG. 11 ). The bubbles generated in the container  280  are supplied to the brush unit  210  via the discharge port  281 . 
     The agitating and mixing mechanism  230  includes a first rotor  231 , a second rotor  232 , and a drive unit  240 . As in the first embodiment, the first and second rotors  231  and  232  are disposed within the container  280 . Each of the rotors  231  and  232  is rotatably provided in the container  280 . 
     A structure of the drive unit  240  will be described referring to  FIGS. 16A to 16C . The drive unit  240  includes a plurality of gears  250 , a plurality of support shafts  260 , and elastic element group  270  (see  FIG. 13 ). The plurality of gears  250  include a rotary drive gear  251 , a combination gear  252 , a rotation transmission gear  253 , a first rotary gear  254 , a rotation change gear  255 , a second rotary gear  256 , and a third rotary gear  257 . The combination gear  252  includes two gears with different types, that is, a first combination gear  252 A and a second combination gear  252 B. The rotation transmission gear  253  includes two gears having different diameters, that is, a first rotation transmission gear  253 A and a second rotation transmission gear  253 B. The support shafts  260  include a first support shaft  261 , a second support shaft  262 , and a third support shaft  263 . 
     A coupling  251 A is coupled to the rotary drive gear  251 . The coupling  251 A protrudes from the head housing  201  via a hole of the head housing  201  (see  FIG. 14 ). The coupling  251 A can be fitted to the joint  14  (see  FIG. 9 ). By fitting the coupling  251 A to the joint  14 , the head block  200  is fixed to the main body block  10  (see  FIG. 9 ). In this state, the driving force of the motor  13  is transmitted to the rotary drive gear  251  via the joint  14  and the coupling  251 A. 
     The rotary drive gear  251  is meshed with the first combination gear  252 A. The first combination gear  252 A and the second combination gear  252 B have the same axis. The second combination gear  252 B is meshed with the first rotation transmission gear  253 A. The first rotation transmission gear  253 A and the second rotation transmission gear  253 B have the same axis. The second rotation transmission gear  253 B is meshed with the first rotary gear  254 , the rotation change gear  255 , and the third rotary gear  257 . The rotation change gear  255  is meshed with the second rotary gear  256 . 
     The first rotary gear  254  is coupled to the first support shaft  261 . The first support shaft  261  is coupled to the first rotor  231 . The first rotor  231  is coupled to the first brush  210 A. The first rotor  231 , the first support shaft  261 , and the first brush  210 A have the same axis. 
     The second rotary gear  256  is coupled to the second support shaft  262 . The second support shaft  262  is coupled to the second rotor  232 . The second rotor  232  is coupled to the second brush  210 B. The second rotor  232 , the second support shaft  262 , and the second brush  210 B have the same axis. 
     The third rotary gear  257  is coupled to the third support shaft  263 . The third support shaft  263  is coupled to the third rotor  233 . The third rotor  233  is coupled to the third brush  210 C. The third rotor  233 , the third support shaft  263 , and the third brush  210 C have the same axis. 
     Rotation of the rotary drive gear  251  is decelerated via the combination gear  252 , the rotation transmission gear  253 , and the first rotary gear  254 . Rotation of the first rotary gear  254  is transmitted to the first rotor  231  via the first support shaft  261 . Thus, the first brush  210 A rotates together with the first rotor  231 . 
     Furthermore, the rotation of the rotary drive gear  251  is decelerated via the combination gear  252 , the rotation transmission gear  253 , the rotation change gear  255 , and the second rotary gear  256 . Rotation of the second rotary gear  256  is transmitted to the second rotor  232  via the second support shaft  262 . Thus, the second brush  210 B rotates together with the second rotor  232 . 
     Furthermore, the rotation of the rotary drive gear  251  is decelerated via the combination gear  252 , the rotation transmission gear  253 , and the third rotary gear  257 . The rotation of the third rotary gear  257  is transmitted to the third rotor  233  via the third support shaft  263 . Thus, the third brush  210 C rotates together with the third rotor  233 . 
     In this manner, the rotation of the rotary drive gear  251  is transmitted to the first to third brushes  210 A to  210 C. A reduction gear ratio between the rotary drive gear  251  and the first brush  210 A, a reduction gear ratio between the rotary drive gear  251  and the second brush  210 B, and a reduction gear ratio between the rotary drive gear  251  and the third brush  210 C are preferably included within the range of 1.6 to 6.4. For example, the reduction gear ratios are set to 3.2. The rotational speed and the torque of the first brush  210 A may be adjusted depending on the reduction gear ratio between the rotary drive gear  251  and the first rotary gear  254 . The rotational speed and the torque of the second brush  210 B may be adjusted depending on the reduction gear ratio between the rotary drive gear  251  and the second rotary gear  256 . The rotational speed and the torque of the third brush  210 C may be adjusted depending on the reduction gear ratio between the rotary drive gear  251  and the third rotary gear  257 . 
     The first rotor  231  and second rotor  232  rotate in the opposite directions to each other. That is, the first brush  210 A and the second brush  210 B rotate in the opposite directions to each other. In addition, the second brush  210 B rotates in the direction opposite to the first and third brushes  210 A and  210 C. 
     The arms  231 A are coupled to the first rotor  231 . Similarly, the arms  232 A are connected to the second rotor  232 . Furthermore, the pillar  231 B is coupled to the distal end portion of the arm  231 A. Similarly, the pillar  232 B is coupled to the distal end portion of the arm  232 A. The arms  231 A and  232 A and the pillars  231 B and  232 B have the same structures as those of the arms  131 A and  132 A and the pillars  131 B and  132 B in the first embodiment. 
     An operation of the cosmetic device  2  will be described referring to  FIG. 15 . When the motor  13  is driven, the driving force of the motor  13  is transmitted to the plurality of gears  250  of the drive unit  240 . As a result, the agitating and mixing mechanism  230  and the brush unit  210  are driven. Specifically, the first to third rotors  231  to  233  rotate, and the first to third brushes  210 A to  210 C rotate. 
     The liquid foaming agent stored in the container  280  is mechanically agitated by rotation of the first and second rotors  231  and  232 . Thus, the liquid foaming agent and air are mixed with each other to generate the bubbles. The bubbles are discharged to the outside of the brush unit  210  from the discharge port  281 . 
     When the motor  13  is driven, the brushes  210 A to  210 C being in contact with the skin imparts the soft physical stimulation to the skin. At this time, since the bubbles supplied from the discharge port  281  are supplied to the skin and the brushes  210 A to  210 C, the cosmetic effect on the skin may be further enhanced. 
     In addition to the advantage according to (1) to (12) obtained by the cosmetic device  1  of the first embodiment, the cosmetic device  2  of the second embodiment has the following advantages. 
     (14) The brushes  210 A to  210 C and the three cylinders  211  can float independently from one another in the axial direction of the brush with respect to the head housing  201 . Thus, by allowing the respective brushes  210 A to  210 C and the respective cylinder  211  to float in accordance with the irregularities of the skin, each of the brushes  210 A to  210 C may be softly brought into contact with the skin. Further, it is easy to bring each of the brushes  210 A to  210 C into close contact with the skin. Accordingly, the cosmetic effect is promoted. 
     (15) The second brush  210 B rotates in the direction opposite to the first and third brushes  210 A and  210 C. Thus, the force acting on the skin from the each of the brushes  210 A to  210 C is dispersed. Therefore, it is possible to advantageously suppress the skin from being caught between the brushes  210 A to  210 C, together with the rotation of the brush unit  210 . Furthermore, when moving the brush unit  210  while being in contact with the skin, resistance to the brush unit  210  is reduced. Accordingly, it is easy to move the brush unit  210  along the skin. 
     (16) Each of the brushes  210 A to  210 C is disposed in the different cylinders  211 . Thus, the bubbles are easily accumulated in the cylinder  211  of each of the brushes  210 A to  210 C. Accordingly, it is possible to exert the soft physical stimulation to the skin. In addition, since the cylinder  211  that does not rotate is also subjected to the force pressed against the skin from the brush unit  210  during rotation, it is possible to suppress a situation in which the skin is caught due to the rotation of the brush unit  210 , and the positions of the skin and the brush unit  210  are shifted. Consequently, it is easy to move the brush unit  210  along the skin. 
     Third Embodiment 
     An external structure of a cosmetic device  3  according to a third embodiment will be described referring to  FIGS. 17 and 18 . In the above-described cosmetic device  1  of the first embodiment, the head block  100  including the one brush  110 A was provided. Meanwhile, in the cosmetic device  3  according to the third embodiment, a head block  300  including a hair depilation mechanism is provided in place of the head block  100 . 
     An internal structure of the head block  300  will be described referring to  FIG. 19 . For example, the head block  300  includes a head housing  301 , a hair depilation unit  310 , and a bubble generator  320  (see  FIG. 20 ). 
     The hair depilation unit  310  is an example of a cosmetic unit. The hair depilation unit  310  serves to exert a cosmetic effect on the skin, by pulling out the hair from the skin. The hair depilation unit  310  has a shape of a drum. Opening and closing claws  311  are formed on an outer periphery of the hair depilation unit  310 . A unit gear  310 A (see  FIG. 20 ) is formed on a side part of the hair depilation unit  310 . When the hair depilation unit  310  rotates, the opening and closing claws  311  are open and closed to interpose the hair therebetween. The hair interposed between the opening and closing claws  311  are pulled out of the skin, based on the rotation of the hair depilation unit  310 . 
       FIG. 20  illustrates a bubble generator  320 . The bubble generator  320  is stored inside the head housing  301  (see  FIG. 19 ). The bubble generator  320  includes an agitating and mixing mechanism  330 , and a container  360  (see  FIG. 19 ). The container  360  is disposed inside the head housing  301  and is fixed to the head housing  301 . 
     A discharge port  361  (see  FIG. 19 ) is formed in the container  360 . The discharge port  361  is open toward the hair depilation unit  310  (see  FIG. 19 ). The bubbles generated in the container  360  are supplied to the hair depilation unit  310  via the discharge port  361 . 
     The agitating and mixing mechanism  330  includes a first rotor  331 , a second rotor  332 , and a drive unit  340 . The first and second rotors  331  and  332  are disposed in the container  360 . Each of the rotors  331  and  332  is rotatably provided within the container  360 . 
     A structure of the drive unit  340  will be described referring to  FIG. 20 . The drive unit  340  includes a plurality of gears  350 . The plurality of gears  350  include a rotary drive gear  351 , a combination gear  352 , a rotation transmission gear  353 , a first rotary gear  354 , a second rotary gear  355 , a rotation input gear  356 , and a rotation output gear  357 . The combination gear  352  includes two gears having different types, that is, a first combination gear  352 A and a second combination gear  352 B are included. The rotation input gear  356  includes two gears having different shapes, that is, a first rotation input gear  356 A and a second rotation input gear  356 B are included. 
     A coupling  351 A is coupled to the rotary drive gear  351 . The coupling  351 A protrudes from the head housing  301  via a hole of the head housing  301  (see  FIG. 19 ). The coupling  351 A can be fitted to the joint  14  (see  FIG. 9 ). By fitting the coupling  351 A to the joint  14 , the head block  300  is fixed to the main body block  10  (see  FIG. 9 ). In this state, the driving force of the motor  13  is transmitted to the rotary drive gear  351  via the joint  14  and the coupling  351 A. 
     The rotary drive gear  351  is meshed with the first combination gear  352 A. The first combination gear  352 A is meshed with the rotation transmission gear  353 . The first combination gear  352 A and the second combination gear  352 B have the same axis. The rotation transmission gear  353  is meshed with the first rotary gear  354 . The first rotary gear  354  is meshed with the second rotary gear  355 . The second combination gear  352 B is meshed with the first rotation input gear  356 A. The first rotation input gear  356 A and the second rotation input gear  356 B have the same axis. The second rotation input gear  356 B is meshed with the rotation output gear  357 . The rotation output gear  357  is meshed with the unit gear  310 A. The first rotary gear  354  and the first rotor  331  have the same axis. The second rotary gear  355  and the second rotor  332  have the same axis. 
     The rotation of the rotary drive gear  351  is decelerated via the combination gear  352 , the rotation transmission gear  353 , and the first rotary gear  354 . The rotation of the first rotary gear  354  is transmitted to the first rotor  331 . 
     In addition, the rotation of the rotary drive gear  351  is decelerated via the combination gear  352 , the rotation transmission gear  353 , the first rotary gear  354 , and the second rotary gear  355 . The rotation of the second rotary gear  355  is transmitted to the second rotor  332 . 
     In this manner, the rotation of the rotary drive gear  351  is transmitted to the first and second rotors  331  and  332 . The first rotor  331  and the second rotor  332  rotate in the opposite directions to each other. The reduction gear ratio between the rotary drive gear  351  and the first rotor  331 , and the reduction gear ratio between the rotary drive gear  351  and the second rotor  332  are preferably included within the range of 0.8 to 3.2. For example, the reduction gear ratios are set to 1.6. 
     The rotational speed and the torque of the first rotor  331  may be adjusted depending on the reduction gear ratio between the rotary drive gear  351  and the first rotor  331 . Furthermore, the rotational speed and the torque of the second rotor  332  may be adjusted depending on the reduction gear ratio between the rotary drive gear  351  and the second rotor  332 . 
     The rotation of the rotary drive gear  351  is decelerated via the combination gear  352 , the rotation input gear  356 , the rotation output gear  357 , and the unit gear  310 A. When the rotation of the rotary drive gear  351  is transmitted to the unit gear  310 A, the hair depilation unit  310  rotates. 
     The reduction gear ratio between the rotary drive gear  351  and the hair depilation unit  310  is preferably within the range of 1.6 to 6.6. For example, the reduction gear ratio is set to 3.3. In addition, the reduction gear ratio between the rotary drive gear  351  and the hair depilation unit  310  is substantially the same as the reduction gear ratio between the rotary drive gear  351  and the unit gear  310 A. 
     It is preferred that the rotational speed of the first and second rotors  331  and  332  be higher than the rotational speed of the hair depilation unit  310 . However, the rotational speed of the first and second rotors  331  and  332  may be the same as the rotational speed of the hair depilation unit  310 , or may be lower than the rotational speed of the hair depilation unit  310 . 
     The arms  331 A are coupled to the first rotor  331 . Similarly, the arms  332 A are coupled to the second rotor  332 . Furthermore, the pillar  331 B is coupled to the distal end portion of the arm  331 A. Similarly, the pillar  332 B is coupled to the distal end portion of the arm  332 A. The arms  331 A and  332 A and the pillars  331 B and  332 B have the same structures as those of the arms  131 A and  132 A and the pillars  131 B and  132 B in the first embodiment. 
     An operation of the cosmetic device  3  will be described referring to  FIG. 19 . When the motor  13  is driven, the driving force of the motor  13  is transmitted to the plurality of the gears  350  of the drive unit  340 . As a result, the agitating and mixing mechanism  330  and the hair depilation unit  310  are driven. Specifically, the first and second rotors  331  and  332  rotate, and the hair depilation unit  310  rotates. 
     By rotation of the first and second rotors  331  and  332 , the liquid foaming agent stored in the container  360  is mechanically agitated. Thus, the liquid foaming agent and air are mixed with each other to generate the bubbles. The bubbles are discharged to the outside of the hair depilation unit  310  from the discharge port  361 . 
     When the hair depilation unit  310  rotates, the opening and closing claws  311  are open and closed. When the opening and closing claws  311  are open, the hair enters between the claws. When the opening and closing claws  311  are closed, the hair is interposed by the claws. Therefore, by bringing the hair depilation unit  310  into contact with the skin, the hair is pulled out of the skin. At this time, since the bubbles supplied from the discharge port  361  are supplied to the skin and the hair depilation unit  310 , the cosmetic effect on the skin may be further enhanced. The cosmetic device  3  according to the third embodiment has the advantages according to (1) to (12) obtained by the cosmetic device  1  of the first embodiment. 
     Fourth Embodiment 
     An external structure of a cosmetic device  4  according to a fourth embodiment will be described referring to  FIGS. 21 and 22 . In the cosmetic device  1  of the first embodiment, the head block  100  including the one brush  110 A was provided. Meanwhile, in the cosmetic device  4  of the fourth embodiment, a head block  400  including a hair removal mechanism is provided in place of the head block  100 . 
     An internal structure of the head block  400  will be described referring to  FIG. 23 . For example, the head block  400  includes a head housing  401 , a hair removal unit  410 , and a bubble generator  420  (see  FIG. 24 ). 
     The hair removal unit  410  is an example of the cosmetic unit. The hair removal unit  410  serves to exert a cosmetic effect on the skin, by cutting the hair from the skin. In this example, the hair removal unit  410  includes an inner blade  411  and an outer blade  412 . The inner blade  411  swings with respect to the outer blade  412 . The hair removal unit  410  cuts the hair by contact of each of the inner blade  411  and the outer blade  412 . 
       FIG. 24  illustrates a bubble generator  420 . The bubble generator  420  is housed inside the head housing  401  (see  FIG. 23 ). The bubble generator  420  includes an agitating and mixing mechanism  430 , and a container  460  (see  FIG. 23 ). The container  460  is disposed inside the head housing  401  and is fixed to the head housing  401 . 
     A discharge port  461  (see  FIG. 23 ) is formed in the container  460 . The discharge port  461  is open toward the hair removal unit  410  (see  FIG. 23 ). The bubbles generated in the container  460  are supplied to the hair removal unit  410  via the discharge port  461 . 
     The agitating and mixing mechanism  430  includes a first rotor  431 , a second rotor  432 , and a drive unit  440 . The first and second rotors  431  and  432  are disposed within the container  460 . Each of the rotors  431  and  432  is rotatably provided within the container  460 . 
     A structure of the drive unit  440  will be described referring to  FIG. 24 . The drive unit  440  includes an eccentric cam  441 , a driving element  442 , and a plurality of gears  450 . The gears  450  include a rotary drive gear  451 , a connecting gear  452 , a rotation transmission gear  453 , a first rotary gear  454 , and a second rotary gear  455 . 
     A coupling  451 A is coupled to the rotary drive gear  451 . The coupling  451 A protrudes from the head housing  401  via a hole of the head housing  401  (see  FIG. 23 ). The coupling  451 A can be fitted to the joint  14  (see  FIG. 9 ). By fitting the coupling  451 A to the joint  14 , the head block  400  is fixed to the main body block  10  (see  FIG. 9 ). In this state, the driving force of the motor  13  is transmitted to the rotary drive gear  451  via the joint  14  and the coupling  451 A. 
     The rotary drive gear  451  is meshed with the connecting gear  452 . The connecting gear  452  is meshed with the rotation transmission gear  453 . The rotation transmission gear  453  is meshed with the first rotary gear  454 . The first rotary gear  454  is meshed with the second rotary gear  455 . The first rotary gear  454  and the first rotor  431  have the same axis. The second rotary gear  455  and the second rotor  432  have the same axis. 
     Rotation of the rotary drive gear  451  is decelerated via the connecting gear  452 , the rotation transmission gear  453 , and the first rotary gear  454 . Rotation of the first rotary gear  454  is transmitted to the first rotor  431 . 
     Further, the rotation of the rotary drive gear  451  is decelerated via the connecting gear  452 , the rotation transmission gear  453 , the first rotary gear  454 , and the second rotary gear  455 . Rotation of the second rotary gear  455  is transmitted to the second rotor  432 . 
     In this manner, the rotation of the rotary drive gear  451  is transmitted to the first and second rotors  431  and  432 . The first rotor  431  and the second rotor  432  rotate in the opposite directions to each other. The reduction gear ratio between the rotary drive gear  451  and the first rotor  431 , and the reduction gear ratio between the rotary drive gear  451  and the second rotor  432  are preferably included within the range of 0.6 to 2.6. For example, the reduction gear ratios are set to 1.3. 
     The rotational speed and the torque of the first rotor  431  may be adjusted depending on the reduction gear ratio between the rotary drive gear  451  and the first rotor  431 . Furthermore, the rotational speed and the torque of the second rotor  432  may be adjusted depending on the reduction gear ratio between the rotary drive gear  451  and the second rotor  432 . 
     The connecting gear  452  and the eccentric cam  441  are fixed to the same axis. The eccentric cam  441  includes a convex portion  441 A which is eccentric with respect to the rotational center axis of the connecting gear  452 . The convex portion  441 A is inserted into an elongated hole  442 A formed on the driving element  442 . An inner blade  411  as a part of the hair removal unit  410  is mounted to the driving element  442 . 
     The rotation of the rotary drive gear  451  is transmitted to the connecting gear  452 . The rotation of the connecting gear  452  is transmitted to the eccentric cam  441 . When the eccentric cam  441  rotates, the convex portion  441 A laterally swings the driving element  442 , by reciprocating (eccentrically moving) within the elongated hole  442 A of the driving element  442 . Therefore, the inner blade  411  attached to the driving element  442  swings with respect to the outer blade  412 , integrally with the driving element  442 . 
     In this manner, the rotation of the rotary drive gear  451  is transmitted to the inner blade  411 . The reduction gear ratio between the rotary drive gear  451  and the eccentric cam  441  is preferably within the range of 0.9 to 3.8. For example, the reduction gear ratio is set to 1.9. The reduction gear ratio between the rotary drive gear  451  and the eccentric cam  441  is substantially the same as the reduction gear ratio between the rotary drive gear  451  and the connecting gear  452 . 
     The arms  431 A are coupled to the first rotor  431 . Similarly, the arms  432 A are coupled to the second rotor  432 . Furthermore, the pillar  431 B is coupled to the distal end portion of the arm  431 A. Similarly, the pillar  432 B is coupled to the distal end portion of the arm  432 A. The arms  431 A and  432 A and the pillars  431 B and  432 B have the same structures as those of the arms  131 A and  132 A and the pillars  131 B and  132 B in the first embodiment. 
     An operation of the cosmetic device  4  will be described referring to  FIG. 23 . When the motor  13  is driven, the driving force of the motor  13  is transmitted to the plurality of gears  450  of the drive unit  440 . As a result, the agitating and mixing mechanism  430  and the hair removal unit  410  are driven. Specifically, the first and second rotors  431  and  432  rotate, and the inner blade  411  of the hair removal unit  410  laterally swings with respect to the outer blade  412 . 
     By the rotation of the first and second rotors  431  and  432 , the liquid foaming agent stored in the container  460  is mechanically agitated. Thus, the liquid foaming agent and air are mixed with each other to generate bubbles. The bubbles are discharged to the outside of the hair removal unit  410  from the discharge port  461 . 
     By bringing the hair removal unit  410  into contact with the skin, the hair is cut by cooperation between the inner blade  411  and the outer blade  412 . At this time, since the bubbles supplied from the discharge port  461  are supplied to the skin and the hair removal unit  410 , the cosmetic effect on the skin may be further enhanced. The cosmetic device  4  of the fourth embodiment has the advantages according to (1) to (12) obtained by the cosmetic device  1  of the first embodiment. 
     Fifth Embodiment 
     An external structure of a cosmetic device  5  according to a fifth embodiment will be described referring to  FIGS. 25 and 26 . In the cosmetic device  1  of the first embodiment, the head block  100  including the one brush  110 A was provided. Meanwhile, in the cosmetic device  5  according to the fifth embodiment, a head block  500  including a massage function of a scalp is provided. 
     An internal structure of the cosmetic device  5  will be described referring to  FIG. 27 . The cosmetic device  5  includes a main body block  50 , a head block  500 , a housing  5 A, and a head cover  5 C. The head block  500  is assembled integrally with the main body block  50 . The housing  5 A includes a handle  5 B. The main body block  50  includes a motor  51 . The motor  51  is housed within the housing  5 A. 
     The head block  500  includes a head cover  5 C, a massaging unit  510 , and a bubble generator  520  (see  FIG. 28 ). The head cover  5 C is fitted to the opening portion of the housing  5 A. 
     The massaging unit  510  is an example of the cosmetic unit. The massaging unit  510  serves to exert the cosmetic action on the skin by applying the soft physical stimulation to the scalp. As illustrated in  FIG. 25 , the massaging unit  510  includes a first massaging element unit  511 , a second massaging element unit  512 , a third massaging element unit  513 , and a fourth massaging element unit  514 . Each of the massaging element units  511  to  514  includes, for example, four massaging elements. Each of the massaging elements is made of, for example, a rubber material, and has a shape that is suitable for massaging the scalp. 
       FIG. 28  illustrates a bubble generator  520 . The bubble generator  520  is housed within the housing  5 A (see  FIG. 27 ). The bubble generator  520  includes an agitating and mixing mechanism  530 , and a container  580  (see  FIG. 27 ). The container  580  is disposed within the housing  5 A and is fixed to the housing  5 A. 
     A discharge port  581  (see  FIG. 27 ) is formed in the container  580 . The discharge port  581  is open toward the massaging unit  510 . Bubbles generated in the container  580  are supplied to the massaging unit  510  via the discharge port  581 . 
     The agitating and mixing mechanism  530  includes a first rotor  531 , a second rotor  532 , and a drive unit  540 . The first and second rotors  531  and  532  are disposed within the container  580 . Each of the rotors  531  and  532  is rotatably provided within the container  580 . 
     A structure of the drive unit  540  will be described referring to  FIG. 28 . The drive unit  540  includes a plurality of gears  550 , and a plurality of eccentric cams  570 . The gears  550  include a rotary drive gear  551 , a combination gear  552 , a first rotary gear  553 , and a first accessory gear (not illustrated). Furthermore, the gears  550  include a second rotary gear  554 , a second accessory gear (not illustrated), a rotation transmission gear  555 , a first massaging gear  556 , a second massaging gear  557 , a rotation transmission gear  558 , a third massaging gear  559 , and a fourth massaging gear  560 . The eccentric cams  570  include a first eccentric cam  571 , a second eccentric cam  572 , a third eccentric cam  573 , and a fourth eccentric cam  574 . 
     The rotary drive gear  551  is fixed to an output shaft of the motor  51 , for example, by press-fitting. Thus, the driving force of the motor  51  is transmitted to the rotary drive gear  551 . The combination gear  552  includes two gears having the different types, that is, a first combination gear  552 A and a second combination gear  552 B. The rotation transmission gear  555  includes two gears having the different diameters, that is, a first rotation transmission gear  555 A and a second rotation transmission gear  555 B. The rotation transmission gear  558  includes two gears having the different diameters, that is, a first rotation transmission gear  558 A and a second rotation transmission gear  558 B. 
     The rotary drive gear  551  is meshed with the first combination gear  552 A. The first combination gear  552 A and the second combination gear  552 B have the same axis. The second combination gear  552 B is meshed with the first rotary gear  553 . The first rotary gear  553  is engaged with the second rotary gear  554 . The first rotary gear  553  and the first accessory gear have the same axis. The first accessory gear is meshed with the first rotation transmission gear  555 A. The first rotation transmission gear  555 A and the second rotation transmission gear  555 B have the same axis. The second rotation transmission gear  555 B is meshed with the first massaging gear  556  and the second massaging gear  557 . 
     The second rotary gear  554  and the second accessory gear have the same axis. The second accessory gear is meshed with the first rotation transmission gear  558 A. The first rotation transmission gear  558 A and the second rotation transmission gear  558 B have the same axis. The second rotation transmission gear  558 B is meshed with the third massaging gear  559  and the fourth massaging gear  560 . The first rotary gear  553  and the first rotor  531  have the same axis. The second rotary gear  554  and the second rotor  532  have the same axis. 
     Rotation of the rotary drive gear  551  is decelerated via the combination gear  552  and the first rotary gear  553 . Rotation of the first rotary gear  553  is transmitted to the first rotor  531 . 
     Further, the rotation of the drive gear  551  is decelerated via the combination gear  552 , the first rotary gear  553 , and the second rotary gear  554 . The rotation of the second rotary gear  554  is transmitted to the second rotor  532 . 
     In this manner, the rotation of the drive gear  551  is transmitted to the first and second rotors  531  and  532 . The first rotor  531  and the second rotor  532  rotate in the opposite directions to each other. The reduction gear ratio between the rotary drive gear  551  and the first rotor  531 , and the reduction gear ratio between the rotary drive gear  551  and the second rotor  532  are preferably included within the range of 2.4 to 9.8. For example, the reduction gear ratios are set to 4.9. 
     The rotational speed and torque of the first rotor  531  may be adjusted depending on the reduction gear ratio between the rotary drive gear  551  and the first rotor  531 . Furthermore, the rotational speed and the torque of the second rotor  532  may be adjusted depending on the reduction gear ratio between the rotary drive gear  551  and the second rotor  532 . 
     The first massaging gear  556  and the first eccentric cam  571  are fixed to the same axis. An output shaft  571 A of the first eccentric cam  571  is eccentric with respect to the rotational center axis of the first massaging gear  556 . Therefore, the output shaft  571 A revolves with respect to the rotational center axis of the first massaging gear  556 . A bottom surface of the first massaging element unit  511  is fixed to the output shaft  571 A. 
     The second massaging gear  557  and the second eccentric cam  572  are fixed to the same axis. An output shaft  572 A of the second eccentric cam  572  is eccentric with respect to the rotational center axis of the second massaging gear  557 . Therefore, the output shaft  572 A revolves with respect to the rotational center axis of the second massaging gear  557 . A bottom surface of the second massaging element unit  512  is fixed to the output shaft  572 A. 
     The third massaging gear  559  and the third eccentric cam  573  are fixed to the same axis. An output shaft  573 A of the third eccentric cam  573  is eccentric with respect to the rotational center axis of the third massaging gear  559 . Therefore, the output shaft  573 A revolves with respect to the rotational center axis of the third massaging gear  559 . A bottom surface of the third massaging element unit  513  is fixed to the output shaft  573 A. 
     The fourth massaging gear  560  and the fourth eccentric cam  574  are fixed to the same axis. An output shaft  574 A of the fourth eccentric cam  574  is eccentric with respect to the rotational center axis of the fourth massaging gear  560 . 
     Therefore, the output shaft  574 A revolves with respect to the rotational center axis of the fourth eccentric cam  574 . A bottom surface of the fourth massaging element unit  514  is fixed to the output shaft  574 A. 
     Rotation of the rotary drive gear  551  is decelerated via the combination gear  552 , the first rotary gear  553 , the first accessory gear, the rotation transmission gear  555 , and the first massaging gear  556 . Rotation of the first massaging gear  556  is transmitted to the first eccentric cam  571 . Thus, the first massaging element unit  511  eccentrically rotates integrally with the output shaft  571 A. 
     Further, the rotation of the drive gear  551  is decelerated via the combination gear  552 , the first rotary gear  553 , the first accessory gear, the rotation transmission gear  555 , and the second massaging gear  557 . The rotation of the second massaging gear  557  is transmitted to the second eccentric cam  572 . Thus, the second massaging element unit  512  eccentrically rotates integrally with the output shaft  572 A. 
     Further, the rotation of the drive gear  551  is decelerated via the combination gear  552 , the first rotary gear  553 , the second rotary gear  554 , the second accessory gear, the rotation transmission gear  558 , and the third massaging gear  559 . The rotation of the third massaging gear  559  is transmitted to the third eccentric cam  573 . Thus, the third massaging element unit  513  eccentrically rotates integrally with the output shaft  573 A. 
     Further, the rotation of the rotary drive gear  551  is decelerated via the combination gear  552 , the first rotary gear  553 , the second rotary gear  554 , the second accessory gear, the rotation transmission gear  558 , and the fourth massaging gear  560 . The rotation of the fourth massaging gear  560  is transmitted to the fourth eccentric cam  574 . Thus, the fourth massaging element unit  514  eccentrically rotates integrally with the output shaft  574 A. 
     In this manner, the rotation of the rotary drive gear  551  is transmitted to the first to fourth massaging element units  511  to  514 . The reduction gear ratio between the rotary drive gear  551  and each of the eccentric cams  571  to  574  is preferably included within the range of 30 to 120. For example, the reduction gear ratio is set to 60. The reduction gear ratio between the rotary drive gear  551  and each of the eccentric cams  571  to  574  is substantially the same as the reduction gear ratio between the rotary drive gear  551  and each of the massaging gears  556 ,  557 ,  559 , and  560 . 
     The arms  531 A are coupled to the first rotor  531 . Similarly, the arms  532 A are connected to the second rotor  532 . Furthermore, the pillar  531 B is coupled to the distal end portion of the arm  531 A. Similarly, the pillar  532 B is coupled to the distal end portion of the arm  532 A. The arms  531 A and  532 A and the pillars  531 B and  532 B have the same structures as those of the arms  131 A and  132 A and the pillars  131 B and  132 B in the first embodiment. 
     The operation of the cosmetic device  5  will be described referring to  FIG. 27 . When the motor  51  is driven, the driving force of the motor  51  is transmitted to the plurality of the gears  550  of the drive unit  540 . As a result, the agitating and mixing mechanism  530  and the massaging unit  510  are driven. Specifically, the first and second rotors  531  and  532  rotate, and the first to fourth massaging element units  511  to  514  rotate. 
     By rotation of the first and second rotors  531  and  532 , the liquid foaming agent stored in the container  580  is mechanically agitated. Thus, the liquid foaming agent and air are mixed with each other to generate the bubbles. The bubbles are discharged to the outside of the massaging unit  510  from the discharge port  581 . 
     By driving the motor  51 , each of the massaging element units  511  to  514  being in contact with the skin imparts the soft physical stimulation to the skin. At this time, since the bubbles supplied from the discharge port  581  are supplied to the skin and the massaging unit  510 , the scalp is cleaned in accordance with the massage of the scalp. The cosmetic device  5  of the fifth embodiment has the advantages according to (1) to (11) obtained by the cosmetic device  1  of the first embodiment. 
     It should be apparent to those skilled in the art that the invention may be embodied in many other specific forms without departing from the spirit or scope of the invention. Particularly, it should be understood that the invention may be embodied in the following forms. 
     In the cosmetic device  5  of the fifth embodiment, the head block  500  and the main body block  50  may be separable from each other. In this case, the head block  500  may have an attachment structure that is attachable and detachable to and from the main body block  10  of the first embodiment. According to this modified example, the motor  13  included in the main body block  10  drives the head block  500  that is the cosmetic unit according to the fifth embodiment. 
     The cosmetic device  1  of the first embodiment may include a separate motor (second motor), in addition to the motor  13  (first motor). In this case, the first motor  13  may drive the brush unit  110 , and meanwhile, the second motor may drive the agitating and mixing mechanism  130 . Even in the cosmetic devices  2  to  5  according to the second to fifth embodiments, two motors may be provided as in this modified example. 
     The cosmetic device  1  of the first embodiment may include the cosmetic unit other than the cosmetic unit illustrated in each of the embodiments.  FIGS. 29 to 32  illustrate examples of various cosmetic units. 
     The cosmetic unit illustrated in  FIG. 29  is a hair depilation unit. In this modified example, for example, the cosmetic device may perform the hair depilation of legs or arms, by driving the hair depilation unit. The hair depilation in the cosmetic device of this modified example means an operation of pulling out the hair. 
     The cosmetic unit illustrated in  FIG. 30  is a hair removal unit. In this modified example, for example, the cosmetic device may perform the hair removal of legs or arms by driving the hair removal unit. The hair removal in the hair cosmetic device of this modified example means an operation of cutting the hair. 
     The cosmetic unit illustrated in  FIG. 31  is a file unit. In this modified example, the cosmetic device is able to remove, for example, the horny of the skin, by driving the file unit. 
     The cosmetic unit illustrated in  FIG. 32  is an armpit hair depilation unit. In this modified example, the cosmetic device is able to perform the hair depilation of the armpit by driving the armpit hair depilation unit. The hair depilation in the cosmetic device of this modified example means an operation of pulling out the hair. 
     In the cosmetic device of the modified examples of  FIGS. 29 to 32 , the head block may include a bubble generator, and the head block may not include a bubble generator. If the bubble generator is included, the bubble generator may be the bubble generator  120  of the first embodiment as an example. 
     The container  170  of the first embodiment may have a plate having a grid or a hole, in place of or in addition to the crosspiece  183 . It is also possible to apply this modified example to the cosmetic devices  2  to  5  according to the second to fifth embodiments. 
     The cosmetic device  1  of the first embodiment may also have a bearing made of resin, in place of the bearing  184  made of metal. It is also possible to apply this modified example to the cosmetic devices  2  to  5  according to the second to fifth embodiments. 
     The cosmetic device  1  of the first embodiment may be configured so that a cosmetic unit having a puff, a file or a rubber material is attachable or detachable in place of the brush unit  110 . The cosmetic device  1  of this modified example is able to remove, for example, horny of the skin, by driving the cosmetic unit. 
     In each of the above-described embodiments, the number of arms coupled to each rotor may arbitrarily change. For example, in the first embodiment, the number of arms  131 A coupled to the first rotor  131  may be one. The same also applies to the number of arms coupled to other rotors. 
     In each of the above-described embodiments, the pillars are not limited to the structure of being coupled to the distal end portion of each arm. Furthermore, the angle formed between the pillar and the arm is not limited to 90. The pillars may be bent to each arm at any angle. 
     The invention may also be applied to a pet haircutting device and a cleaning device and the like in addition to the cosmetic device, and may also be applied to a device having a function for discharging bubbles other than these devices.