An elevation mechanism for a central input selector knob includes: a cylindrical cam having two cylindrical rails; a central input device mounted on a slider cylinder having two opposite ends of a pin that run in the two cylindrical rails to move the central input device between an operation position and a storage position; a cap that has two opposite guiding ribs configured to slide into rails of a main housing, the cap being attached to the main housing such that the slider cylinder is enclosed by the main housing and the cap; and a motor having an axis where a second gear is mounted, the second gear being configured and arranged to transmit movement to a first gear thereby causing the slider cylinder to move thereby moving the central input device between the operation position and the storage position.

Provided is a grip heater apparatus for a construction machine that can improve operability by heating the grip portions of left and right operating levers and maintaining a favorable operating environment for the left and right operating levers when work is carried out in a cold region and the operator's hands get cold. The grip heater apparatus includes: left and right grip heaters 31 and 32 provided in grip portions of left and right operation levers 26 and 28, respectively; a battery supplying electric power to the left and right grip heaters; a heater switch 34 for instructing the left and right grip heaters to be turned on or off; and a control device supplying the electric power from the battery to the left and right grip heaters only when the engine is running, the gate lock lever 27 is at a getting-on/off prevention position, and the heater switch instructs the left and right grip heaters to be turned on.

Provided is a grip heater apparatus for a construction machine that can improve operability by heating the grip portions of left and right operating levers and maintaining a favorable operating environment for the left and right operating levers when work is carried out in a cold region and the operator's hands get cold. The grip heater apparatus includes: left and right grip heaters 31 and 32 provided in grip portions of left and right operation levers 26 and 28, respectively; a battery supplying electric power to the left and right grip heaters; a heater switch 34 for instructing the left and right grip heaters to be turned on or off; and a control device supplying the electric power from the battery to the left and right grip heaters only when the engine is running, the gate lock lever 27 is at a getting-on/off prevention position, and the heater switch instructs the left and right grip heaters to be turned on.

An illumination switch device includes a push button, a plurality of indicator lenses, a holder, a detector, a plurality of light emitters, and a base. The push button has an internal space and an opening. Each indicator lens has a columnar shape. The indicator lenses are juxtaposed in the internal space of the push button. The holder holds the push button such that the push button is movable in a longitudinal direction of each indicator lens. The detector detects a displacement of the push button in the longitudinal direction. The light emitters are respectively disposed opposite one ends of the indicator lenses in the longitudinal direction. The base is made of an opaque resin, and covers side faces of the indicator lenses while being in tight contact with the side faces. The base is integrated with the indicator lenses.

An illumination switch device includes a push button, a plurality of indicator lenses, a holder, a detector, a plurality of light emitters, and a base. The push button has an internal space and an opening. Each indicator lens has a columnar shape. The indicator lenses are juxtaposed in the internal space of the push button. The holder holds the push button such that the push button is movable in a longitudinal direction of each indicator lens. The detector detects a displacement of the push button in the longitudinal direction. The light emitters are respectively disposed opposite one ends of the indicator lenses in the longitudinal direction. The base is made of an opaque resin, and covers side faces of the indicator lenses while being in tight contact with the side faces. The base is integrated with the indicator lenses.

The invention relates to a height-adjustable control lever carrier for a commercial vehicle seat, which carrier is at least partially arranged to the side of a seat part, wherein the control lever carrier is provided for receiving at least one control lever for controlling vehicle equipment and at least one armrest, and is characterised in that the control lever carrier comprises a multi-joint mechanism construction, by means of which the control lever carrier is adjustable both in a seat height direction and in a seat longitudinal direction relative to the seat part.

The invention relates to a height-adjustable control lever carrier for a commercial vehicle seat, which carrier is at least partially arranged to the side of a seat part, wherein the control lever carrier is provided for receiving at least one control lever for controlling vehicle equipment and at least one armrest, and is characterised in that the control lever carrier comprises a multi-joint mechanism construction, by means of which the control lever carrier is adjustable both in a seat height direction and in a seat longitudinal direction relative to the seat part.

An operation device includes an operation unit including an operation body worked by an operator's manipulation; a position detecting part detecting a position of the operation body; and a display unit displaying a position of the operation body. The display unit includes an operation member, a supporting body, and a movable load applying mechanism including a movable member, a magnetic generating mechanism, a magnetorheological fluid, and an operation controlling part. The display unit includes a display part displaying the operation position. A display controlling part PS controls a display. A controller is included to control the operation controlling part and the display controlling part. In a control method of the operation device, the controller controls to display a state of the operation position of the operation body on the display part.

Provided is an input/output operation device including: an operation unit, which is operated by an operator; a detection unit, which detects a position of the operation unit to generate a position signal corresponding to the position of the operation unit; a control circuit, which receives the position signal to generate a speed control signal; and a drive circuit, which receives the speed control signal to drive the operation unit, in which the control circuit: (a) causes the position signal to pass through a first filter circuit to generate a speed signal; (b) causes the position signal to pass through a second filter circuit, which has a frequency transmission characteristic that is different from that of the first filter circuit, to generate a correction signal; and (c) adds at least the speed signal and the correction signal together to generate the speed control signal.

Provided is an input/output operation device including: an operation unit, which is operated by an operator; a detection unit, which detects a position of the operation unit to generate a position signal corresponding to the position of the operation unit; a control circuit, which receives the position signal to generate a speed control signal; and a drive circuit, which receives the speed control signal to drive the operation unit, in which the control circuit: (a) causes the position signal to pass through a first filter circuit to generate a speed signal; (b) causes the position signal to pass through a second filter circuit, which has a frequency transmission characteristic that is different from that of the first filter circuit, to generate a correction signal; and (c) adds at least the speed signal and the correction signal together to generate the speed control signal.