Abstract: A gearshift lock is used to prevent a gearshift from moving with respect to a gearshift seat from which the gearshift extends. The gearshift lock includes a locking box firmly attached on the gearshift seat and includes two passages therein. Two first springs each are respectively received in a corresponding one of the passages of the locking box. A U-shaped latch includes a curved rod and two prongs each of which is received in a corresponding passage of the locking box. A motor is positioned in the locking box and includes a toothed rotor head. A spring-biased engaging device is positioned in the locking box and engaged to the two prongs of the U-shaped latch thus limiting the two prongs of the U-shaped latch in the passages of the locking box and the curved rod of the U-shaped latch enclosing the gearshift thus preventing the gearshift from being moved. A control circuit functions to drive the motor in response to a reception of an effective control signal from a remote control.

Abstract: A linear ball guide assembly for guiding a load to move smoothly and linearly along the guide rail at low frictional resistances, including a straight guide rail, a slide block, a pair of end caps, a pair of cover plates for U-shaped ball turning grooves, a pair of loaded ball retainers and two loops of balls. Both sides of the guide rail and inner sides of the slide block are formed with linear Gothic ball grooves for increasing the load capacity of the ball guide assembly. Above the ball grooves, two recirculating holes are formed on the slide block for the recirculation of balls. The end cap is formed with U-shaped ball turning grooves for guiding the loaded balls into the recirculating holes of the slide block. The balls then go through the U-shaped ball turning grooves of the opposite end cap back to the Gothic ball grooves to complete the recirculating loop of the balls between the slide block and the guide rail.