Patent Abstract:
A cosmetic brush which includes a cylindrical cap, a supporting tube mounted inside, of the cap, an upright-standing stem movably received in the tube, and a cosmetic container. A tuft of bristles is fixed on a lower end of the stem. A spring is disposed inside of the cap such that the stem is biased downwardly inside of the tube. The stem has a latching protrusion and the tube has a guide slit to receive the latching protrusion. The downward movement of the stem is stopped by the guide slit when the tuft of bristles is exposed outside of the tube. When the supporting tube is inserted into the container, the latching protrusion is latched and pushed upwards by the top opening of the container, thereby allowing the stem and the tuft of bristles to be raised so as to be received inside of the tube.

Full Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a cosmetic brush in which a stem is vertically formed at a cap screw-engaged with a cosmetic container, and more particular, to a cosmetic brush in which a tuft of bristles automatically gets in and out of the inside of a supporting tube by rotating the cap so as to be screw-engaged or screw-disengaged with/from the container, so that problems such as bending or spreading of the tuft of bristles and the like generated due to its twist can be prevented when rotating the tuft of bristles in a liquid cosmetics having high-viscosity. 
   2. Background of the Related Art 
   In general, in case of make-up with liquid cosmetic products such as lip gross, mascara, eye liner, and nail varnish by using a cosmetic brush, as a cap mounted at an upper portion of the stem where a tuft of bristles is implanted is screw-engaged with a cosmetic container, a user can conveniently carry the liquid cosmetic product in a state where the stem and the tuft of bristles is kept in the cosmetic container. If necessary, the user can apply make-up with the cosmetic brush stained with liquid cosmetics after removing the cap from the cosmetic container. 
   In the prior art, however, when the tuft of bristles is rotated in the liquid cosmetics having a high-viscosity upon screw-coupling the cap and the cosmetic container with each other, the tuft of bristles is twisted and tangled due to the resistance against the liquid cosmetics. 
   Consequently, since a user cannot properly apply make-up to where the liquid cosmetic is needed with the tangled bristles, it causes a waste of the liquid cosmetic due to the tangled bristles, and also a refined make-up is not operated. 
   The tendency of development of various liquid cosmetics having a high-viscosity is, especially in the present day, increased and also the liquid cosmetic gains increasing viscosity in proportion to its usage due to the volatilization of the solvent, and hence there is a great need for a cosmetic brush which can minimize the tangle of the bristles thereof. 
   Further, an inlet of the cosmetic container is coupled to an inner cap thereof having an inlet/outlet hole formed thereon, which is inclined so as to be gradually narrowed in its diameter toward its lower end, and by which the liquid cosmetic stained on the stem is wiped when the stem gets in and out of the inlet/outlet hole. 
   Thus, since the stem gets in and out of the inlet/outlet hole in such a manner as to be in close contact with the inner circumferential surface thereof, compressed air is produced inside of the container when the stem is inserted into the inlet/outlet hole of the inner cap, such as where a piston is inserted into a cylinder. 
   Since the pumping effect by which the liquid cosmetic is pushed up is induced by such compressed air, there occurs a problem in that the cap is stained by the liquid cosmetic which flows into the inside of the cap through a gap between the inlet/outlet hole of the inner cap and the stem. 
   SUMMARY OF THE INVENTION 
   Accordingly, the present invention has been made to solve the above problems occurring in the prior art, and it is an object of the present invention to provide a cosmetic brush which can prevent problems such as the tangle of the turf of bristles and the like generated due to its twist in a liquid cosmetics having a high-viscosity by automatically being inserted to or removed from the inside of a supporting tube when a cap is screw-engaged and screw-disengaged with/from a cosmetic container, and can increase its convenience in use. 
   To achieve the above object, according to the present invention, there is provided 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The above and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention in conjunction with the accompanying drawings, in which: 
       FIG. 1  is a perspective view showing a state where a cosmetic brush according to the present invention is coupled to a cosmetic container; 
       FIG. 2  is an exploded perspective view of a cosmetic brush according to the present invention; 
       FIGS. 3   a  through  3   c  are cross-sectional views sequentially showing processes for coupling the cosmetic brush to the cosmetic container; 
       FIG. 4  is an exploded perspective view of another embodiment of the cosmetic brush according to the present invention; 
       FIG. 5  is an assembly cross-sectional view of  FIG. 4 ; 
       FIG. 6  is an exploded perspective view of another embodiment of the cosmetic brush according to the present invention; and 
       FIG. 7  is an assembly cross-sectional view of  FIG. 6 . 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. 
   As shown in  FIGS. 1 and 2 , a cosmetic brush  1  according to the present invention includes a cylindrical cap  10 , and a stem  11  implanted with a tuft of bristles  11   a.    
   That is, the stem  11  is vertically erected at the inner center of the cylindrical cap  10 , and the tuft of bristles  11   a  is fixed on a lower end of the stem  11 . 
   When a screw portion  10   a  formed on an inner peripheral surface of the cap  10  is screw-engaged with a screw portion  20   a  formed on an outer peripheral surface of an inlet of a cosmetic container  20 , the stem  11  is inserted through an inlet/outlet hole  21   a  having a narrow width formed on an inner cap  21  of the cosmetic container  20 . 
   Thus, the cosmetic brush  1  is constructed in order to be easily carried in a state where the cap  10  of the cosmetic brush  1  is screw-engaged with the cosmetic container  20  and then the stem  11  and the tuft of bristles  11   a  are received inside of the cosmetic container  20 . 
   Of course, the cosmetic brush  1  as constructed above belongs to a technical spirit, which has been already well known. Nevertheless, the most important feature in configuration of the present invention resides in that the cap  10  is screw-engaged and screw-disengaged with/from the cosmetic container  20  by rotating the cap  10 , the tuft of bristles  11   a  automatically gets in and out of the inside of a supporting tube  14 , to thereby effectively prevent the tangle of the tuft of the bristles  11   a.    
   In other words, the supporting tube  14  is vertically mounted on the center of the inside of the cap  10 , and the stem  11  is inserted into the inside of the supporting tube  14 . 
   The stem  11  is elastically supported by a compressed spring  15  of a coil-type mounted to the upper portion of the supporting tube  14 , and receives a downward elastic force of the spring  15 . 
   Further, the stem  11  has a latching protrusion  12  formed on both sides of the upper portion thereof, however, of course the latching protrusion  12  may be protrusively formed on a side of the upper portion of the stem  11 . 
   The supporting tube  14  has a guide slit  14   a  formed on the upper portion thereof in such a manner as to be formed long in a lengthwise direction thereof. The guide slit  14   a  is constructed such that the latching protrusion  12  formed on the upper portion of the stem  11  is inserted into the guide slit  14   a  and then the stem  11  together with the latching protrusion  12  is moved within the length of the guide slit  14   a.    
   At this time, the latching protrusion  12  together with the stem  11  descends by the elastic force of the spring  15  so as to be latched by a lower end of the guide slit  14   a , the tuft of bristles  11   a  of the stem  11  is protruded out of the lower portion of the supporting tube  14 , to thereby allow a user to apply make-up using the tuft of the bristles  11   a , and the cap  10  is in a state of being removed from the cosmetic container  20 , as shown in  FIG. 3   a.    
   In these state, when the cap  10  is screw-engaged with the inlet of the cosmetic container  20  so as to allow the supporting tube  14  to be inserted through the inlet/outlet hole  21   a  formed on the inner cap  21  of the cosmetic container  20 , only the supporting tube  14  is downwardly moved in a state where the latching protrusion  12  of the stem  11  outwardly protruded from the supporting tube  14  is latched by the inner cap  21 , to thereby allow the tuft of bristles  11   a  implanted in the lower end of the stem  11  to be partially inserted into the inside of the supporting tube  14 , as shown in  FIG. 3   b.    
   So far, since the supporting tube  14  is merely inserted into the inlet/outlet hole  21   a  of the inner cap  21  to thereby be downwardly moved so that the rotation of the stem  11  is not operated, the twist or tangle of the tuft of bristles  11   a  is not generated at all. 
   In these state, when the cap  10  is rotated to thereby be screw-engaged with the inlet of the cosmetic container  20 , the supporting tube  14  is rotated to thereby be downwardly moved in a state where the stem  11  together with the latching protrusion  12  is latched by the inner cap  21 , so that the tuft of bristles  11   a  can be completely inserted and received into the inside of the supporting tube  14 . 
   As a result, since the stem  11  together with the supporting tube  14  are rotated and also the tuft of bristles  11   a  is completely inserted into the inside of the supporting tube  14 , the tuft of bristles  11   a  is exposed to the liquid cosmetic for a comparatively short period of time, so that the tangle of the tuft of bristles  11   a  generated due to its twist is effectively prevented to thereby allow a user to precisely apply make-up using the tuft of bristles  11   a  stained with the liquid cosmetic, the cosmetic brush  1  has an advantage in that competitiveness of the cosmetic brush  1  is considerably enhanced. 
   Further, the tuft of bristles  11   a  is rotated together with the cap  10  in a state where it is received into the inside of the supporting tube  14  when the cap is reversely rotated, so that the tuft of bristles  11   a  is rotated with less resistance against the liquid cosmetic. Thereafter, when the cap  10  is removed from the inlet of the cosmetic container  20 , the latching protrusion  12  is removed from the top peripheral edge part of the inner cap  21  to thereby release the latched state, and also the stem  11  is downwardly moved so that the tuft of bristles is protruded out of the lower portion of the supporting tube  14  by a restoration force of the spring  15 , to thereby allow the cosmetic brush  1  to be used. Consequently, when the cap  10  is rotated so as to be removed from the cosmetic container  20 , the tuft of bristles  11   a  is in contact with the liquid cosmetic for a comparatively short period of time to thereby be hardly affected by the resistance. 
   Meanwhile, as shown in  FIGS. 4 and 5 , the latching protrusion  12  is outwardly protruded from an elastic piece  13  formed on the upper portion of the stem  11 , and has an inclined surface  12   a  formed thereon. 
   At this time, when the spring  15  is inserted into the inside of the supporting tube  14  and then the elastic piece  13  formed on the upper portion of the stem  11  is inserted into the inside of the supporting tube  14 , the inclined surface  12   a  of the latching protrusion  12  is advanced into the inside of the supporting tube  14  while being pressed together with the elastic piece  13 . Thereafter, when the latching protrusion  12  is positioned in a guide slit  14   a , it is outwardly protruded via the guide slit  14   a  by means of an elastic force of the elastic piece  13  so as to be latched by the guide slit  14   a , so that the stem  11  can be easily assembled into the inside of the supporting tube  14 . 
   In addition, as shown in  FIGS. 6 and 7 , a packing member  30  of a ring type having an elastic force is coupled around the upper portion of the stem  11 . In this state, when the stem  11  is inserted through the inlet/outlet hole  21   a  of the inner cap  21 , the packing member  30  comes in close contact with the lower portion of the inlet/outlet hole  21   a , so that an inner compressed air inside of the cosmetic container  20  is prevented from being discharged. 
   At this time, although the stem  11  is inserted through the inner cap  21  to thereby generate an inner compressed air inside of the cosmetic container  20 , the packing member  30  of a ring type is in close contact with the inner circumferential surface of the inner cap  21  to thereby prevent the compressed air from being discharged, so that the pumping effect in which liquid cosmetic is reverse flowed into the upper portion of the cosmetic container  20  together with the compressed air can be effectively prevented, to thereby considerably enhance the competitiveness of the cosmetic container. 
   As describe above, according to the present invention, when the cap is rotated so as to allow the cap  10  to be screw-engaged or screw-disengaged with/from the cosmetic container  20 , only a short length of the tuft of bristles  11   a  is exposed to the liquid cosmetic for a comparatively short period of time so as to be hardly affected by the resistance force against the liquid cosmetic while the tuft of bristles  11   a  is rotated in a state where it is received into the inside of the supporting tube  14 , so that the tangle or twist of the tuft of bristles  11   a  can be effectively prevented, to thereby allow a user to precisely apply make-up using the tuft of bristles  11   a  stained with the liquid cosmetic, resulting in considerably increasing the competitiveness of the cosmetic brush  1 . 
   Accordingly, the cosmetic brush  1  according to the present invention has advantages such as where the twist of the tuft of bristles  11   a  is prevented until the liquid cosmetic is completely consumed by considerably improving the tangle or twist of the tuft of bristles  11   a , to thereby provide a cosmetic brush having high quality to consumers. 
   While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.

Technology Classification (CPC): 0