Rotary lock swtich for switching and resetting a computer

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG.
1, the computer lock switch is operated by a key which is exactly the same as the key for the conventional computer lock switch in FIG.
7 and which also is provided with recesses G, shoulders G1, and a projection G2.
Since all the parts from the keyhole of the computer switch lock to the bush thereof are the same as the prior art in FIG.
7, the details of the parts can be omitted.
Unlike a conventional computer lock switch, the lock switch according to this invention has a RESET or resetting position RE in addition to OFF and ON positions, and its terminal seat 4, which is made by insulating material, carries four terminals 431, 441, 451, and 461 instead of two.
When the key is turned to the RE position, the result is the same as that when the reset button of a conventional keyboard is touched.
Referring to FIG.
3 to FIG.
5, the inside of the terminal seat has an annular groove 42, in which the two contacts I1 and I2 are received.
Unlike the prior art, the two contacts here are not interconnected by a conducting piece J but are electrically insulated with each other.
The respective fixed end of each terminal 431, 441, 451 and 461 is arcuated to define an arcuated track 43, 44, 45 and 46.
Terminal 431 is connected to the power source, terminal 441 is connected to the reset circuit of a computer provided with the lock switch of the invention, terminal 451 is connected to the grounding line, and terminal 461 is connected to the keyboard.
Referring to FIG.
3 and FIG.
9, when the key is not inserted or kept in the OFF position, no tracks are interconnected or only tracks 43 and 45 are interconnected by contact I2.
The keyboard is not energized, so the computer is in OFF state.
In FIG.
4 and FIG.
10, when the key is turned to ON position, tracks 43 and 46 are interconnected by contact I1.
Thus the keyboard is energized and available for use.
In FIG.
5 and FIG.
11, when the key is turned to RESET or the resetting position, tracks 43 and 46 are interconnected by contact I1, whereas tracks 44 and 45 are interconnected by contact I2