Cap device, container assembly provided with cap device, and locking device therefor

1. A cap device to be detachably installed on a container using rotational coupling including a container body in which the contents are accommodated and a neck part extending on an upper end of the container body, the cap device comprising:

a first coupling part to be rotationally coupled to the neck part to detachably couple the cap device to the container using rotational coupling; and

a pass-through device through which the contents accommodated in the container body pass,

wherein a locking device is provided for the cap device, the locking device including a loop-shaped band part and a locking part to be coupled to the cap device,

wherein the loop-shaped band part has an inner circumference of polygonal or elliptical shape matching an outer circumference of the container body having a polygonal or elliptical column shape so that the loop-shaped band part is vertically movable in a sliding manner along an outer circumference of the container body and is not allowed to relatively rotate along the outer circumference of the container body, in the state in which the container body is fitted to and inserted into the band part of the locking device and the locking part is coupled to the cap device.

2. The cap device of claim 1 , wherein:

the cap device is coupled to a content storage container including the container for accommodating the contents and a lid; and

the cap device includes a second coupling part to be coupled to the lid.

3. The cap device of claim 1 , wherein the first coupling part is a screw thread which is screw-coupled to a screw thread formed on a neck part which has an open part formed in an upper portion of the container.

4. The cap device of claim 3 , wherein:

the cap device includes a holder on which the first coupling part is formed and a cap body including the pass-through device;

the holder includes a cylindrical inner wall and a bottom part extending from a bottom of the cylindrical inner wall along an outer circumference thereof; and

the first coupling part is formed on an inner circumferential surface of the cylindrical inner wall and screw-coupled to the neck part.

5. The cap device of claim 4 , wherein:

the first coupling part is the screw thread formed on the inner circumferential surface of the cylindrical inner wall and is engaged with, rotationally coupled to, and released from the screw thread formed on an outer circumferential surface of the neck part;

the cap body includes a case and the pass-through device accommodated in the case; and

a bottom protruding part inserted into an open part formed by the cylindrical inner wall is formed on a bottom of the case.

6. A container assembly comprising:

a container configured to accommodate contents;

a cap device detachably installed on the container; and

a locking device,

wherein the container includes a container body in which the contents are accommodated and a neck part formed on an upper end of the container body,

wherein the cap device includes a first coupling part rotationally coupled to the neck part to detachably couple the cap device to the container using rotational coupling,

wherein the locking device includes a loop-shaped band part and a locking part,

wherein the loop-shaped band part has an inner circumference of polygonal or elliptical shape matching an outer circumference of the container body having a polygonal or elliptical column shape so that the loop-shaped band part can slide upwards along the outer circumference of the container body and from bottom of the container body, and is not allowed to relatively rotate along the outer circumference of the container body, and

wherein the locking part integrally formed with the band part is hook-coupled to the cap device to prevent rotation of the cap device rotation coupled to the neck part.

7. The container assembly of claim 6 , wherein the first coupling part of the cap device is rotationally coupled to a screw thread formed on an outer circumferential surface of a neck part of the container.

8. The container assembly of claim 6 , wherein:

the cap device includes a holder on which the first coupling part is formed and a cap body including the pass-through device;

the holder includes a cylindrical inner wall and a bottom part extending from a bottom of the cylindrical inner wall along an outer circumference thereof; and

the first coupling part is formed on an inner circumferential surface of the cylindrical inner wall and rotationally coupled to the neck part.

9. The container assembly of claim 6 , wherein

the container assembly further includes a lid;

the lid is rotationally coupled to an outer circumferential surface of an upper portion of the cap device; and

the lid is rotationally coupled to an outer circumferential surface of the neck part of a container in a state in which the cap device is separated from the container.

10. The container assembly of claim 6 , wherein:

the locking part is a rotation-preventing protrusion coupled to the band part.

11. A locking device which prevents separation between a container including a container body in which the contents are accommodated and a neck part formed on an upper end of the container body and a cap device detachably coupled to the container, the locking device comprising:

a band part having a loop shape; and

a locking part prevent relative movement of the cap device with respect to the container,

wherein the cap device is detachably coupled to the neck part using rotational coupling,

wherein the band part has an inner circumference of polygonal or elliptical shape matching an outer circumference of the container body having a polygonal or elliptical column shape so that the band part can slide vertically along the outer circumference of the container body and is not allowed to rotate with respect to the container body, and

wherein the locking part is formed integrally with the band part to be hook-coupled to the cap device.

12. The locking device of claim 11 , wherein:

the band part has an inner circumferential surface in contact with an outer circumference of the container body and has a predetermined strength; and

the locking part is a rotation prevention protruding part and is fixedly inserted into the cap device to restrict rotational movement of the cap device with respect to the container body.

13. The locking device of claim 11 , wherein:

the locking part includes a hook extending to protrude upward from an upper end of the band part.

14. The locking device of claim 11 , wherein:

the locking device is for a cap device which is rotatably coupled to the container body and opens or closes an open part formed in the neck part; and

the band part is insertion-coupled to the container body, is slidably movable along the container body, and does not rotate with respect to the container body.

15. The locking device of claim 11 is integrally formed of a metal or plastic.