Automatic switch

The present invention relates to an automatic switch for a user to automatically switch between two or more computer configurations, and more particularly to an automatic switch that has an integrally injection-molded enclosure to provide good weather-resistance, impact-resistance, and absolute protection of an internal circuit board thereof.

The highly developed electronic and information technologies enable people to collect required information or to trade directly over networks via computers, making computers a requisite tool in people's work, learning, entertainments, leisure activities, and daily life.

For people to access two or more computers at the same time, there is developed an automatic switch to enable a user to automatically switch among different signal paths. FIG. 1 shows a conventional automatic switch 40 that is configured into a box 41 . The box 41 is internally provided with a circuit board (not shown). Ports 42 , 43 , and 44 for various types of signal cable connectors are provided on peripheral walls of the box 41 . Inmost cases, the box 41 includes outer walls that are made of metal material or rigid plastic material and assembled together by means of screws (not shown). The automatic switch 40 is normally positioned on a host enclosure of a computer configuration and tends to unexpectedly fall off the host enclosure to result in a damaged circuit board due to vibration. Moreover, when a high humidity exists, moisture in the air tends to attach to the circuit board to cause short circuit. Repair or maintenance of the circuit board is therefore required.

A primary object of the present invention is to provide a plug-type automatic switch for a user to access and control multiple computer configurations through one single switch. The automatic switch includes a main body externally provided with connector ports and enclosing an internal circuit board. The main body has an integrally injection-molded plastic enclosure to provide good weather-resistance, impact-resistance, and absolute protection of the internal circuit board and circuits thereon.

The automatic switch of the present invention also includes more than one or two sets of cable-connected connectors directly extended from the main body and electrically connected to the internal circuit board via signal cables.

The integrally injection-molded enclosure of the main body includes a circuit-protecting layer for enclosing the circuit board, an outer case enclosing the circuit-protecting layer, and an anti-slipping layer coating an outer surface of the outer case.

The circuit-protecting layer of the main body is made of a plastic material having a low melting point to avoid damages to circuits provided on the circuit board during the injection molding.

The outer case of the main body has good strength and high rigidity and therefore provides excellent protection to the internal circuit board and the entire main body of the automatic switch.

The anti-slopping layer of the main body has soft surface to enable firm holding of the main body and convenient plugging and unplugging of signal cables in and from the main body.

The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein

FIG. 1 is a perspective view of a conventional automatic switch for switching between two or more computer configurations;

FIG. 2 is a front view of an automatic switch according to the present invention;

FIG. 3 is a perspective view of a main body of the automatic switch of the present invention; and

FIG. 4 is a cross-sectional view of the main body of the automatic switch of the present invention.

Please refer to FIG. 2 that is a front view of an automatic switch 10 according to an embodiment of the present invention. As shown, the automatic switch 10 includes a main body 20 having connector ports provided on external walls thereof, and more than one or two sets of cable-connected connectors 30 directly extended from the main body 20 .

Please refer to FIGS. 3 and 4 that are perspective and cross-sectional views, respectively, of the main body 20 of the automatic switch 10 of the present invention. The main body 20 has an integral enclosure that is formed through three times of injection molding to include a circuit-protecting layer 21 for enclosing a circuit board 24 provided in the main body 20 , an outer case 22 enclosing the circuit-protecting layer 21 , and an anti-slipping layer 23 coating an outer surface of the outer case 22 .

It is to be noted that the circuit-protecting layer 21 of the main body 20 is in completely close contact with the circuit board 24 , so that the circuit board 24 is entirely isolated from and protected against external environments. Electronic elements (not shown) soldered onto the circuit board 24 are not subjected to undesired looseness or separation even if the main body 20 is fiercely vibrated or impacted. Moreover, the circuit board 24 enclosed in the circuit-protecting layer 21 is also isolated from moisture in the air to therefore always maintain good electric performance. That is, the circuit board 24 is best protected in the main body 20 .

The circuit-protecting layer 21 enclosing the circuit board 24 is made of a plastic material having a low melting point to avoid damages to circuits on the circuit board 24 due to a high temperature in the course of injection molding of the circuit-protecting layer 21 .

The outer case 22 enclosing the circuit-protecting layer 21 is made of a plastic material that shows high strength and high rigidity after being molded into a desired shape. The outer case 22 occupies a major part of the enclosure of the main body 20 and serves to ensure a well-shaped overall appearance of the main body 20 while protecting the internal circuit board 24 .

The anti-slipping layer 23 coating the outer surface of the outer case 22 is made of a plastic material that provides a soft surface after being molded to enable a user to hold the switch without the risk of easily slipping off the main body 20 . Cables can therefore be more easily plugged or unplugged in or from the main body 20 .

As can be seen from FIG. 2 , each set of the cable-connected connectors 30 includes a central processing unit (CPU) signal cable connector 31 , a keyboard signal cable connector 32 , and a mouse signal cable connector 33 . The cable-connected connectors 31 , 32 , and 33 are adapted to plug in corresponding connectors (not shown) on computer configurations to which the automatic switch 10 is to be connected. As can be seen from FIG. 4 , the circuit board 24 is electrically connected to the sets of cable-connected connectors 30 via signal cables 11 .

In brief, the automatic switch 10 of the present invention uses the main body 20 having cable-connected connector sets 30 to replace the conventional box-type switch 40 , enabling the switch 10 to be used in a more convenient manner. Moreover, the enclosure of the main body 20 of the automatic switch 10 is integrally formed through multiple times of injection molding to protect circuits provided on the internal circuit board 24 , making the automatic switch 10 safer and more convenient for use.