TECHNICAL FIELD The present invention relates to a cap assembly with a storage chamber for a secondary material, and more particularly, to a cap assembly with a storage chamber that canstoreasecondarymaterialthatcanbemixedwithaprimary material contained in a container associated with the cap by simple opening the cap.

BACKGROUND ART In a variety of industrial field, it is sometimes necessary to mix two or more different materials with each other to prepare a mixture, prior to using the mixture. Forexample, whenitcomestobeverageindustrialfiled, users wishes to add a variety of flavors or vitamin to the water. To this end, the userpurchases the flavor or vitamin and the separated bottle water and mixes the flavor or the vitamin with the bottle water. However, it is very troublesome for the user to do so. SUMMARY OF THE INVENTION Therefore, the present invention has been made in an effort to solve the above-described problems of the conventional art. It is an object of the present invention to provide a capwith a storage chamber for a secondarymaterial that will be mixed with a primary material contained in a container associated with the cap by simply opening the cap. It isanotherobjectofthepresentinventiontoprovide a product employing such a cap with a storage chamber for a secondary material. It is still another object of the present invention to provide a cap assembly that is simple in a structure, thereby saving the manufacturing costs.

TECHNICAL SOLUTION To achieve the above objects, the present invention provides a cap assembly with a storage chamber including a stationary member coupled to a container and provided with a storage chamber defined therein and a movable member with an operation portion, the movable member being coupled to a spouting portion of the stationary member to release a secondary material into the container.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are views of a cap assembly with a storage chamber according to a first embodiment of the present invention; FIG.3isasectionalviewofacapassemblywithastorage chamber according to a second embodiment of the present invention; FIG.4 isasectionalviewofacapassemblywithastorage chamber according to a third embodiment of the present invention; FIG.5isasectionalviewofacapassemblywithastorage chamber according to a fourth embodiment of the present invention; FIG.6isasectionalviewofacapassemblywithastorage chamber according to a fifth embodiment of the present invention; and FIG.7isasectionalviewofacapassemblywithastorage chamber according to a sixth embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be describedmore in detail hereinafter in conjunction with the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to refer to the same or like parts. FIGS. 1 and 2 show a first embodiment of the present invention. A cap assembly 1 includes a stationarymember 10 coupledto a neckportion 101 of a container 100 andamovable member 10 coupled to the stationary member 20. The stationarymember 10 includes a spoutingportion 11 extendingupward, a storagetube 12 formedextendingdownward tostoreasecondarymaterialA, andastoragespace13defined in the storage tube 12. A seal film 14 is integrally formed on a lower portion of the storage tube 12, being provided with a cutting line 15. A fixing portion 16 is formed on a center of the seal film 14. The movable member 20 is screw-coupled to a spouting portion 11 of the stationarymember 10. Anoperationportion 21 is formed extending from an inner center of the movable member 20. The operation portion 21 is formed in a tube shape in which a fixing portion of the seal layer 14 is tightly inserted. Therefore, in a state where the secondary material is filled in the storage tube 12 formed on the stationarymember 10, the movable member 20 is screw-coupled to the spouting portion 11 of the stationary member 10. Then, the fixingportion 16 formed on the seal layer 14 is tightly insertedintheoperationportion21andthestationarymember 10 is screw-coupledto the neckportion of the container 100. At this point, when the movable member 20 is unscrewed fromthe spoutingportion 11 of the stationarymember 10, the operation portion 21 moves upward together therewith and the fixing portion coupled on the lower end of the operation portion 21 also moves upward, thereby moving the seal layer 14 upward. Whentheseallayer14movesupwardaboveapredetermined level, the cutting line 15 is broken to separate the fixing portion 16 from the operation portion 21, thereby defining an opening. As a result, the secondary material filled in the storage tube 13 is dropt into the container 100. Therefore, the secondary material A stored in the storage space 13 is perfectly protected fromhumidity by the seal layer 14. The seal layer 14 is broken when the movable member 20 is separated to release the secondary material A. FIG. 3 shows a second embodiment of the present invention. Ahook step 30 is formed on a lower end of the operation portion 21 formedon themovablemember 20. Afixingportion 16 is formed on the seal layer 14. The fixing portion 16 has an opened top to which a lower end of the operation portion 21 is inserted. A hook groove 31 in which the hook step 30 is insertedis formedonaninnersurfaceofthefixingportion 16. A cutting line 15 is formed on the seal layer 14 in a spiral shape. FIG.4 showsathirdembodimentofthepresentinvention. A lower end of the operation portion 21 is attached on the seal layer 14 with the cutting line 15. The cutting line 15 is broken when the movable member 20 moves upward. FIG. 5 shows a fourth embodiment of the present invention. A portion of the seal layer 14 is removably assembled onalowerendoftheoperationportion21formedonthemovable member 20. Thatis, anassemblingportion50providedwithacutting line 15 is assembled on the seal layer 14, The assembling portion may be adhered or fitted in the seal layer 14. FIG. 6showsafifthembodimentofthepresentinvention. Anopening60isformedontheseallayer14andanextreme end of the operation portion 21 is inserted. A seal seat 61 is attached on the extreme end of the operation portion. FIG.7 showsasixthembodimentofthepresentinvention. A seal layer 14 is integrally formed on a lower portion of a spouting portion 11 of a stationarymember 10. A fixing portion is formed on the seal layer 14 with a cutting line 15. The fixing portion 16 is inserted in the operation portion formed in the movable member 20.

INDUSTRIAL APPLICABILITY As described above, the present invention can be associated with a variety of containers such as a PET bottle and a pouch container.