Patent ID: 6422106
Filing Date: 2002-07-23
Classification: F16H,Y10T

Abstract:
A shift switch control device for selection lever units of automatic transmissions, comprising:a selection lever installed within a main frame of a chassis by a hinge shaft and used for selecting a desired range within a transmission pattern during an automatic transmission mode and performing an up- or down-shifting operation during a manual transmission mode, said transmission pattern having an automatic transmission mode pattern and a manual transmission mode pattern, said selection lever turning on or off up- and down-shift switches during the manual transmission mode, thus performing the up or down-shifting operation, said up- and down-shift switches being mounted to the chassis by brackets such that the up- and down-shift switches are symmetrical along a central axis of a M-stage of the manual transmission mode pattern; a rotary lever mounted to said hinge shaft at its lower end at one side of said selection lever such that a top portion of said rotary lever is positioned in a gap between the up- and down-shift switches, with a key slot formed at a central portion of said rotary lever at a surface facing said selection lever; rotary lever return means provided at the lower end of said rotary lever for providing a forward and backward returning force to said rotary lever; a locking key hinged within a casing of said selection lever such that the locking key is rotatable to pass through a connection hole of said casing so as to be finally inserted into said key slot of the rotary lever, thus locking said rotary lever to said selection lever at the M-stage of the manual transmission mode pattern, said locking key being normally biased by a key return spring in a direction such that the locking key is inserted into said key slot of the rotary lever; and a key actuation rod set within the casing of said selection lever, with a keyhole having a size corresponding to a radius of actuation of said locking key and formed at one sidewall of said key actuation rod, and a knob mounted to a top end of said key actuation rod and provided with a push button, said key actuation rod being operated in conjunction with both said push button and said key return spring, thus rotating said locking key to the outside or inside of said casing of the selection lever.