Connection between filtering cap and container

A filtering assembly includes a container and a filtering cap which is connected to a connection end of the container. A flange extends spirally from an outside of the connection end and includes a positioning portion which is the longest section of the flange. The filtering cap includes an inner skirt and an outer skirt, wherein the inner skirt has a groove defined in an inside thereof the flange can be engaged with the groove. The groove has a positioning port which is the deepest portion of the whole groove. A plurality of bosses extend from an inside of the outer skirt. The positioning portion is engaged with the positioning port and the bosses are engaged with the wave-shaped ring when the filtering cap is located onto the container.

FIELD OF THE INVENTION

The present invention relates to a filtering assembly and more particularly, to a connection between the filtering cap and the container.

BACKGROUND OF THE INVENTION

A conventional filtering assembly generally includes a filtering cap which is connected to a container and water enters the filtering cap and filtered and received in the container. The filtering cap includes horizontal flanges which are slidably engaged with grooves defined in outside of the opening of the container so as to connect the cap to the container. There are notches defined in the grooves and the flanges can be engaged with the notches to lock the cap onto the container. However, when locking the cap to the container, the user has to push the cap downward and press a seal ring so as to lock the cap on the container, this might not be convenient for some users. Before the flanges engaged with the notches, a reaction force is generated due to the gap between the flanges and the notches, the reaction force may reduce the force applied on the seal ring and leak may happen. The conventional way to connect the cap to the container does not provide obvious signal to the user when the cap is locked onto the container so that the user might stop rotating the cap before the cap is locked. The cap is not located at a fixed position relative to the container so that when the cap is locked, the relative position between the cap and the container may vary, and the instruction labels on the container cannot be positioned to face the user every time.

The present invention intends to provide a filtering assembly comprising a filtering cap and a container, wherein the filtering cap can be locked to the container with a click sound generated when the filtering cap is rotated to the locked position.

SUMMARY OF THE INVENTION

The present invention relates to a filtering assembly which comprises a container with a filtering cap mounted to a connection end on an end of the container. A flange extends spirally from an outside of the connection end and has a positioning portion which is the longest section of the flange. A first inlet and a first outlet are defined through the connection end and two seal rings are mounted to two respective outsides of the first inlet and first outlet. A wave-shaped ring is located at an end surface of the container and the connection end extends from the end surface. The filtering cap has a second inlet and a second outlet defined in an outside thereof, the second inlet and the second outlet are located to communicate with the first inlet and the first outlet. An inner skirt and an outer skirt are located in the filtering cap. The inner skirt has a groove defined in an inside thereof and the flange is engaged with the groove. The groove has a positioning port which is the deepest portion of the whole groove. A plurality of bosses extend from an inside of the outer skirt. The positioning portion is engaged with the positioning port and the bosses are engaged with the wave-shaped ring when the filtering cap is located onto the container.

The primary object of the present invention is to provide a filtering assembly wherein the cap can be locked onto the container and a click sound is generated when the cap is at the locked position.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring toFIGS. 1 to 3, the filtering assembly of the present invention comprises a container10having a connection end11on an end thereof and a flange12extends spirally from an outside of the connection end11. The flange12has a positioning portion13which is the longest section of the flange12and the positioning portion13is located at the beginning section of the flange12. A first inlet14and a first outlet17are defined through the connection end11and two seal rings15are mounted to two respective outsides of the first inlet14and the first outlet17. A wave-shaped ring16is located at an end surface of the container10wherein the connection end11extends from the end surface.

A filtering cap20has a second inlet21and a second outlet22defined in an outside thereof, the second inlet21and the second outlet22are located to communicate with the first inlet14and the first outlet17when the filter cap20is located at the opened position. An inner skirt23and an outer skirt24are located in the filtering cap20. The inner skirt23has a groove25defined in an inside of the inner skirt23and the flange12can be engaged with the groove25. The groove25has a positioning port26which is the deepest portion of the whole groove25. A plurality of bosses27extend from an inside of the outer skirt24.

When the filtering cap20is at opened position, the first inlet14and first outlet17are in communication with the second inlet21and the second outlet22respectively as shown inFIG. 3. As shown inFIG. 4, when the filtering cap20is located onto the container10by rotating the filtering cap20toward the connection end11, the positioning portion13is engaged with the positioning port26and the bosses27are engaged with the wave-shaped ring16. When the bosses27contact the wave-shaped ring16, at least one “click” sound is generated to acknowledge the user that the filtering cap20is at the lock position. At the lock position, the relative position between the filtering cap20and the container10is fixed. In other words, the instructions and labels on the container10are located to face the user when the filtering cap20is at the lock position.