Joint used in one of a water inlet or water outlet of a filter cylinder or a filter casing

A joint used in one of a water inlet or water outlet of a filter cylinder, or a water inlet or a water outlet of a filter casing is disclosed. The joint is a round cylindrical tube and comprises at least one first waterproof washer installed near one end of the round cylindrical tube; an outer thread on an outer surface of the round cylindrical tube and behind the waterproof washer; an opening away from the washer is a round opening and an interior of the round cylindrical tube is formed as a polygonal hole; a front end of the T shape sleeve have a plurality of tapered claws the waterproof washer encloses the front end of the T shape sleeve so as to be expanded by the tapered claws; thereby the round cylindrical tube; and a water tube.

FIELD OF THE INVENTION

The present invention relates to joints, and in particular to a joint used in one of a water inlet or water outlet of a filter cylinder or a filter casing, wherein the joint can be installed rapidly in a prepared water inlet or water outlet of a filter cylinder or filter casing. The joint offers the functions of quick combination with a water inlet or water outlet of a filter cylinder or filter casing and receiving water quickly.

BACKGROUND OF THE INVENTION

A water filter comprises a filter cylinder installed with a filter material and a filer casing screwed on the filter cylinder. Or a water filter is formed by a filter material installed in a sealed container. Water flows into the water filter from the filter casing or a water inlet of the sealed container, and flows through the filter material of the filter cylinder or the sealed container. Then water is drained out from a water outlet of the filter casing or the sealed container to be used. Both the water inlet and water outlet of the filter casing or the sealed container are installed separately in a joint for connecting with a water tube conveniently. Therefore, no matter a removable filer material of the filter cylinder or a non-removable filter material of the sealed container, the water inlet or water outlet is necessary to be installed. Besides, the joint is also necessary for the water inlet or water outlet in order to install a water tube conveniently.

Three ways are used in the prior art joint connecting with a water inlet or water outlet of a water filter, which are described as the followings.

Referring toFIGS. 1 and 2, the first prior art is a screw connection method in that a joint is connected with a water filter. The inner threads100,110are separately formed on the inner diameters of a water inlet10or a water outlet11of filter casing1or a sealed container; and outer threads20,21are formed on the outer sides of two axial ends of the front side and the back side of a joint2, and then the back end of the joint2is screwed with a screw nut22by using the same thread pitch. Furthermore, the screw nut22is screwed with the outer thread21. After the T shape sleeve30is assembled to a water tube3by a T shape sleeve30being inserted into one end of the water tube3, a screwing effect of a screw nut22which is screwed into a joint2facilitates a water tube3to be assembled to the inner hole of the joint2so as to offer a function of connecting another water filter or water inlet and outlet. However, the traditional screw connection method has not only complicated components, but also has a disadvantage of increasing the manufacturing procedure. For more detail, because several layers of waterproof tapes200,210must be covered on each outer thread of each screw connecting position, in order to increase the tightness between the inner thread and the outer thread, the manufacturing procedure becomes more complicated and requires much time and work. In addition, the T shape sleeve30installed into the water tube3may loose so as to induce a problem of leaking water. Thus, the manufacture cost cannot be reduced greatly, and in operation, the manufacture process is inconvenient and slow in assembly. In a further prior art, inner threads100,110are separately formed on a water inlet10or a water outlet11of a filter casing1or a sealed container. The front and the external side of a joint2is formed with an outer thread23, and the back side of the joint2is formed with a polygonal shape24. By the same thread pitch and the same external diameter of an inner thread and an outer thread, a water inlet10and a water outlet11can be screwed into one end of the joint2. Then a T shape sleeve31is assembled to the outer side of a water tube3, and at the same time, a waterproof washer4is inserted into the inner hole of the joint2. The front and the external side of the T shape sleeve31are formed with a plurality of tapered claws310and a plurality of slits311which are axially arranged, so that the front end of the T shape sleeve31is elastic to be inserted easily into the outer side of the water tube3. Then the waterproof washer4, the T shape sleeve31and the water tube3are inserted into the inner hole of the joint2. Finally the raised claws310which are on the front and outer side of T shape sleeve31are wedged in the joint2, so that the assembly of the water inlet10and water outlet11of the sealed container or the filter casing1with the water tube3is complete, as illustrated inFIGS. 3 and 4. Although the second prior art used in assembling a water tube may have an advantage of rapid assembly, the prior art still has several disadvantages. For more detail, because several layers of waterproof tapes200,210must be covered on each outer thread of each screw connecting position, in order to increase the tightness between the inner thread and the outer thread, the manufacturing procedure becomes more complicated and requires much time and work. In addition, the polygonal shape24protrudes out of the the sealed container and the filter casing. As a result, it is easily damaged by collision.

In another prior art, a waterproof washer4is installed directly in a water inlet or water outlet of a filter cylinder or filter casing, then a sleeve5is pushed into the water inlet or water outlet of filter cylinder or filter casing in force. A C sharp clip is clipped on the round ring tube5. A periphery of the C shape clip is formed with a plurality of metal elastomers50. Because each metal elastmore500leans toward the same direction, the sleeve5can be pushed easily into the water inlet10or water outlet11of the filter cylinder or filter casing1. A T shape sleeve31is sleeved on the outer side of the water tube3. The T shape sleeve31has the same features of the structure as mentioned above. The front1outer wall of the T shape sleeve31has a plurality of axially arranged claws311and a plurality of slits310. so that the front end of the T shape sleeve31is elastic and thus it can be inserted easily into the exterior of the water tube3. Then the waterproof washer4, the T shape sleeve31and the water tube3are inserted into the round ring tube5. Finally, the claws are in the front end and exterior of T shape sleeve31are locked to the sleeve5, so that the assembly of the water inlet10and water outlet11of the sealed container or the filter casing1with the water tube3is completed as illustrated inFIGS. 5 and 6. The method has a simple structure, but a plurality of metal elastomers500must be arranged on the sleeve5. Besides, each metal elastomer leans toward the same direction in order to reach desirable goals. Otherwise, the water tube3is not possible to be installed into the water inlet10or water outlet11of the filter cylinder or filter casing1. In addition, since the sleeve5must be pushed to enter into the water inlet10or water outlet11of the filter cylinder or filter casing1in force, the inner walls of the water inlet10or water outlet11of the filter cylinder or filter casing1are easily damaged for the sake of great pushing force. Meanwhile the damaged inner walls of the water inlet10or water outlet11of the filter cylinder or filter casing1will reduce the assembly of the water tube3. Thus, it is happened that the sleeve5explodes s for the sake of high water pressure.

The present invention is modified for improving the disadvantages of the prior art water inlet or water outlet of the filter cylinder, which is based on the manufacture experiences of several decades to follow the principles of economy and efficiency. In assembly, the waterproof washer encloses a front end of the T shape sleeve, and then the T shape sleeve with the waterproof washer is placed into the polygonal hole from the round opening; and then the water tube is placed in T shape sleeve with a part of the water tube protruding out, and then the joint is installed into a water inlet or water outlet of a sealed container or filter casing. The joint used in one of a water inlet or water outlet of a filter cylinder has several advantages, such as convenient operation, quick combination and high pressure-tolerance.

SUMMARY OF THE INVENTION

Accordingly, the primary object of the present invention is to provide a joint used in one of a water inlet or water outlet of a filter cylinder, or a water inlet or a water outlet of a filter casing. The joint can be assembled rapidly on a water inlet or a water outlet of a filter cylinder or a filter casing so as to reach the goals of convenient operation, quick combination and high pressure-tolerance.

To achieve above objects, the present invention provides a joint used in one of a water inlet or a water outlet of a filter cylinder, or a water inlet or a water outlet of a filter casing. The joint is a round cylindrical tube basically, and comprises at least one first waterproof washer installed near one end of the round cylindrical tube. An outer thread is formed on an outer surface of the round cylindrical tube and behind the waterproof washer. A polygonal hole is opened away from the washer and is formed in the front and the interior of the round cylindrical tube. Thereby the round cylindrical tube can be screwed into the water inlet or water outlet of filter cylinder or filter casing so as to be matched to the size of the periphery of the filter cylinder or filter casing, and the waterproof washer is able to seal the gap by screwing force so as to reach the goal of waterproof. Then the T shape sleeve31is installed in a water tube, and the joint is installed into a water inlet or water outlet of a sealed container or a filter casing. Therefore, in assembly, the waterproof washer encloses a front end of the T shape sleeve and then the T shape sleeve with the waterproof washer is placed into the polygonal hole from the round opening; and then the water tube is placed in T shape sleeve with a part of the water tube protruding out, and then the joint is installed into a water inlet or water outlet of a sealed container or filter casing.

DETAILED DESCRIPTION OF THE INVENTION

Referring toFIGS. 7 and 8, the exploded perspective view and schematic cross view of the present invention is illustrated. The joint comprise a round cylindrical tube6; at least one first waterproof washer60installed near one end of the round cylindrical tube6; an outer thread61on an outer surface of the round cylindrical tube6and behind the waterproof washer60; a second waterproof washer4, a T shape sleeve31with T shape lateral sides; and a water tube3.

An outer diameter of the outer thread61is matched to the size of the inner threads100,110of the water inlet10or water outlet11of filter cylinder or filter casing1. An opening of the round cylindrical tube6far away from the washer60is a round opening63and an interior of the round cylindrical tube6is formed as a polygonal hole62. Thereby the round cylindrical tube6can be screwed into the water inlet10or water outlet11of filter cylinder or filter casing1so as to be matched to the periphery of the filter cylinder or filter casing. Then the waterproof washer4enclosed a front end of the T shape sleeve31and then the T shape sleeve31with the waterproof washer4is placed into the polygonal hole62from the round opening63. Then the water tube3is placed in the T shape sleeve31with a part of the water tube3protruding out.

In the present invention, a front end of the T shape sleeve31has a plurality of tapered claws311which are axially arrange so that the T shape sleeve31is elastic. The waterproof washer4encloses the front end of the T shape sleeve31so as to be expanded by the tapered claws311. Thereby the round cylindrical tube6has a preferred waterproof effect.

Other than being screwed into the water inlet10or water outlet11of filter cylinder or filter casing1, the round cylindrical tube6of the present invention is tightly engaged to the water inlet10or water outlet11of filter cylinder or filter casing1by the waterproof washer60to tightly combine to inner walls of the water inlet10or water outlet11and screwing effect of the outer thread61and inner thread100is achieved. Thus, the assembly work can be positioned easily and rapidly to have the effect of waterproof and high pressure-tolerance.

Therefore, from above description, it is known that a joint can be installed fast and conveniently in one of a water inlet or water outlet of a filter cylinder, or a water inlet or a water outlet a filter casing. Other than having several advantages, such as easy composition, low cost, quick combination, convenient operation and receiving water quickly, the joint can tolerate high water pressures by screwing effect of the outer thread and inner thread.