Coaxial cable adapter

A coaxial cable adapter includes: an outer sleeve pipe, having an inserting slot with a straight aperture disposed therein; a rubber gasket, formed by a straight cylindrical soft rubber, and disposed in the inserting slot of the outer sleeve pipe; and an inner sleeve pipe, having a metal locking head and a plastic cylindrical pushing pipe respectively disposed on two ends of a central pipe, in which one end of the central pipe extends out of the pushing pipe. When the inner sleeve pipe and the outer sleeve pipe are joined, the soft rubber gasket is deformed and filled in the gaps of the adapter to wrap a cable, thereby achieving a better inner waterproofness. Meanwhile, as the adapter has an entirely metal case, its strength is also enhanced.

BACKGROUND OF THE INVENTION

1. Field of Invention

The present invention relates to a coaxial cable adapter for signal transmission, which is provided with a soft rubber gasket disposed therein and has desirable waterproofness and strength.

2. Related Art

In order to connect coaxial cables on two ends, a coaxial cable adapter is usually disposed on an end portion of the cable. Referring toFIGS. 1 and 2, the structure of a first conventional coaxial cable adapter is shown. The adapter has a metal sleeve pipe10and an exposed plastic sleeve member13. A movable joint11is disposed on an outer end of the metal sleeve pipe10, and a sleeve barrel12is enchased on an inner end thereof, in which embossed grains are disposed on a central outer ring of the sleeve barrel12so as to be conveniently held. In an aperture of an inner end of the sleeve barrel12, an inclined depressed ring slot121with a taper is opened inwards at a small distance away from the end portion. When joined to the plastic sleeve member13, the inclined depressed ring slot121strongly forces the plastic sleeve member13, such that when an end portion131of the plastic sleeve member13is inserted into the aperture of the sleeve barrel12, the end portion131is pressed by the inclined depressed ring slot121and is thus deformed. As a result, the squeezed material at the end portion131of the plastic sleeve member13is embedded in the inclined depressed ring slot121, and the plastic sleeve member13is pivoted at the end portion of the adapter. Thereby, the first conventional structure is completed.

For a second conventional structure, referring toFIG. 3, another type of an adapter is shown, and the principle of this structure is quite similar to the first one. A movable joint30and a sleeve barrel32are disposed on two ends of the adapter, and a plastic sleeve member31is disposed on the center. The joining between one end of the plastic sleeve member31and the sleeve barrel32is similar to the structure inFIG. 2, and the details will not be described herein again.

The aforementioned two conventional adapters have the following disadvantages in manufacturing and use.

1. In the conventional structure, the deformable plastic sleeve member is exposed, i.e., the plastic sleeve member itself is a part of the case of the adapter, so that the case of the adapter may easily crack when exposed to the sun and rain or experiencing a temperature difference for a long time.

2. As the thinner and fragile end portion of the plastic sleeve member is squeezed to be joined to the sleeve barrel, not only the strength of the joining is poor, but the joined members may easily fall off. Further, during the manufacturing, if the squeeze is forced, the plastic sleeve member usually cracks when rotationally pressed by the inclined depressed ring slot with a taper, thus resulting in rejected products, which is another disadvantage of the prior art.

3. Being a part of the case of the adapter, the plastic sleeve member has certain hardness. However, the hardness is inversely proportional to the tightness of the inner line, such that the waterproofness and adhesiveness of the adapter are poor, which is still another disadvantage of the prior art.

In view of the above, in the conventional coaxial cable adapter, the plastic sleeve member and the metal part are both disposed outside, thus causing many disadvantages. Therefore, through hard research, an inner wrapping adapter with better performance is provided to satisfy the expectation in the field.

SUMMARY OF THE INVENTION

Accordingly, the present invention is directed to an adapter. The adapter includes: an outer sleeve pipe, having an inserting slot with a straight aperture disposed therein; a rubber gasket, formed by a straight cylindrical soft rubber instead of a conventional rigid plastic, and disposed in the inserting slot of the outer sleeve pipe; and an inner sleeve pipe, having a metal locking head and a plastic cylindrical pushing pipe respectively disposed on two ends of a central pipe, in which one end of the central pipe extends out of the pushing pipe. Thereby, when the inner sleeve pipe and the outer sleeve pipe are joined through the soft rubber gasket, the inner waterproofness of the adapter is improved. Moreover, as the adapter has an entirely metal case, its strength is also enhanced. These are the advantages of the present invention.

The present invention is further directed to an adapter. In this adapter, an internal thread and an external thread matching with each other are respectively disposed in the outer sleeve pipe and the inner sleeve pipe, such that the adapter can be assembled without requiring relatively expensive tools, and also locked more easily to achieve a compact wrapping and desired waterproofness.

DETAILED DESCRIPTION OF THE INVENTION

In order to make the content of the present invention comprehensible to the examiner, embodiments accompanied with figures are described in detail below.

Referring toFIGS. 4,5, and6, a coaxial cable adapter2of the present invention includes an outer sleeve pipe21, a rubber gasket22, and an inner sleeve pipe23.

The outer sleeve pipe21has an inserting slot211with a straight aperture disposed therein, and a necking-down portion212is disposed on an outer end of the inserting slot211.

The rubber gasket22is formed to be a deformable straight cylindrical tube, and is disposed in the inserting slot211of the outer sleeve pipe21.

The inner sleeve pipe23has a metal locking head232and a plastic cylindrical pushing pipe231. The metal locking head232is disposed on one end of a central pipe233, and another end of the central pipe233extends out of the plastic cylindrical pushing pipe231. The plastic cylindrical pushing pipe231is disposed the central pipe233on a side of the metal locking head232. When the outer sleeve pipe21receives the inner sleeve pipe23, the rubber gasket22is pressed and deformed, and the plastic cylindrical pushing pipe231is inserted between the inserting slot211and a portion of the deformed rubber gasket22.

When the outer sleeve pipe21and the inner sleeve pipe23are pressed by a tool to be joined, referring toFIGS. 5 and 6, the central pipe233extending from one end of the inner sleeve pipe23and the pushing pipe231are inserted into the inserting slot211, and pressed against an end portion of the rubber gasket22, such that the rubber gasket22is elastically deformed towards the central pipe233and is thus slightly raised. Referring toFIG. 7, if the raised rubber gasket22is continuously pressed by the pushing pipe231, and is meanwhile stopped by a cable40already assembled therein, the rubber gasket22is deformed towards the gaps so as to entirely wrap the cable40, thus achieving a better protection, a tighter joining, and a more desired waterproofness.

Referring toFIGS. 8 and 9, another embodiment of the present invention is shown. The coaxial cable adapter includes an outer sleeve pipe21, a rubber gasket22, and an inner sleeve pipe23.

The outer sleeve pipe21has an inserting slot211with a straight aperture disposed therein. A necking-down portion212is disposed on an outer end of the inserting slot211, and an internal thread213is disposed on the other end.

The rubber gasket22is formed to be a deformable straight cylindrical tube, and is disposed in the inserting slot211of the outer sleeve pipe21.

The inner sleeve pipe23has a metal locking head232and a raised plastic cylindrical pushing pipe231. The metal locking head232is disposed on one end of a central pipe233, and the raised plastic cylindrical pushing pipe231is disposed on the central pipe233on a side of the metal locking head. An external thread234is disposed on an end portion of the pushing pipe231.

Referring toFIGS. 9 and 10, when the cable40is assembled in the outer sleeve pipe21, the pushing pipe231of the inner sleeve pipe23is pushed into the inserting slot211, and the external thread234of the pushing pipe231is screwed with the internal thread213of the inserting slot211, so as to be locked by screwing. When the rubber gasket22is continuously pressed by the pushing pipe231, and is meanwhile stopped by the cable40therein, the rubber gasket22is deformed towards the gaps so as to entirely wrap the cable40, thus achieving a tighter joining and a better waterproofness. Besides, such a joining manner by screwing also reduces the cost of pressing with a tool, and is more convenient in use.

Due to the above sophisticated designs, the present invention achieves the following advantages in practice.

1. In the present invention, as the inserting slot211in the outer sleeve pipe21is straight, it is not difficult for manufacturing. Meanwhile, the rubber gasket22is an elastomer, so that after being closely joined to the inserting slot211in the outer sleeve pipe21, the rubber gasket22may not be damaged. Thereby, the cable is effectively wrapped, and a better waterproofness is achieved. Moreover, when the adapter needs to be reassembled (because of a misoperation), the rubber gasket22is still a complete piece and can be reused, such that the cost is lowered. This is an advantage of the present invention.

2. In the present invention, the pushing pipe231of the inner sleeve pipe23is plastic, and accordingly the rubber gasket22is made of rubber, thus achieving a better adhesiveness and meanwhile obtaining a lighter weight, which is another advantage of the present invention.

3. As the rubber gasket22is of a pure cylindrical structure, the conventional rigid plastic is not required, and the tapering or squeezing process is not performed, so that the manufacturing is simplified and the product yield is increased, which is another advantage of the present invention.

4. In the present invention, the internal thread213and the external thread234matching with each other are respectively disposed in the outer sleeve pipe21and the inner sleeve pipe23, such that the adapter can be assembled without requiring relatively expensive tools, and also locked more easily to achieve a compact wrapping and desired waterproofness.

To sum up, due to its novelty, practicability, and industrial utilization value, the present invention conforms to the patent requirements, and is filed with the IPO according to the Patent Law.