Abstract: A tip of the shift lever 5 is connected with the head member 10 and is freely swingable in the up and down directions around the second swing center axis 12 and is made integrally with the head member 10 to swing freely in the right and left directions around the first swing center axis 6. While the click ball 18 in a tip of the head member 10 is pushed against the click groove 19, the rotating position of the shift lever 5 is engaged with any one position of the neutral N, the first forward position F1, the second forward position F2, the first reverse position R1, or the second reverse position R2 and the shift switch is changed corresponding to each position by the tip of the head member 10.

Abstract: A diagnosis apparatus for a photo coupler having at least one photo coupler including a light emitting element the amount of light emitted from which changes in accordance with the value of a current flowing therethrough and a light receiving element which receives the light from the light emitting element to convert it into an electric signal corresponding to the received amount of light, a checking current setting circuit for setting a current flowing through the light emitting element to a current value for checking, a level detecting circuit for controlling a current flowing through the light emitting element on the basis of the current value set by the checking current setting circuit, a reference signal generator for generating a reference signal, a comparing and detecting circuit for comparing the electric signal from the light receiving element with the reference signal and detecting the deterioration of a function of the photo coupler on the basis of the result of comparison.