Remote-control gearshift mechanism for vehicular transmission

In a remote-control gearshift mechanism for a vehicle of the type including

• a control shaft extended in parallel with a steering column and movable in the axial direction and rotatable about its axis by a gearshift lever,
• a linkage for transmitting the axial movement and rotation of said control shaft to a transmission,
• a first spring loaded over the lower portion of said control shaft for normally biasing said control shaft upward to its neutral position which corresponds to a position intermediate between the ends of the stroke of said control shaft in the axial direction,
• a second spring loaded over the upper portion of said control shaft for normally biasing said control shaft downward to its neutral position,
• stopper means for limiting the spring action of said first spring in such a manner that said control shaft may be prevented from moving past its neutral position,
• an improvement comprising
• a bore coaxially extended through the upper portion of said control shaft from the upper end thereof and downward a predetermined distance,
• a stationary rod which has its upper end securely attached to the steering column and is telescopically inserted into said bore of said control shaft,
• a small-diameter rod extended downward from the lower end of said stationary rod coaxially thereof,
• a spring retaining ring axially slidably fitted over said small-diameter rod,
• a stopper ring attached to the lower end of said small-diameter rod for engagement with said spring retaining ring to limit the downward movement of said spring retaining ring,
• a step at the bottom of said bore for engagement with the undersurface of said spring retaining ring, and
• said second spring fitted over said small-diameter rod and loaded between the lower end of said stationary rod and said spring retaining ring.