A brake operation portion that allows a manual brake operation is included in a vehicle cabin, the brake operation portion includes a grip portion, and an elbow rest member is provided at, in the vehicle rear side of the grip portion, a position on which an elbow of a driver can abut in a state in which the driver grips the grip portion so as to be capable of operating the grip portion. Thus, even a physically disabled driver may freely perform a driving operation and easily manually perform a delicate brake operation.

A keyboard device includes a keyboard module and a palm rest module. The palm rest module is arranged beside a lateral side of the keyboard module, and supports a wrist of a user. The palm rest module includes a pedestal, a casing and an adjusting element. The casing is disposed on the pedestal. The adjusting element is arranged between the pedestal and the casing. A position of the casing relative to the pedestal is adjustable through the adjusting element. In a first usage state, the casing is moved toward the keyboard module or moved away from the keyboard module through the adjusting element. In a second usage state, the casing is rotated about the adjusting element and relative to the keyboard module, so that an included angle is formed between the casing and the lateral side of the keyboard module.

A keyboard device includes a keyboard module and a palm rest module. The palm rest module is arranged beside a lateral side of the keyboard module, and supports a wrist of a user. The palm rest module includes a pedestal, a casing and an adjusting element. The casing is disposed on the pedestal. The adjusting element is arranged between the pedestal and the casing. A position of the casing relative to the pedestal is adjustable through the adjusting element. In a first usage state, the casing is moved toward the keyboard module or moved away from the keyboard module through the adjusting element. In a second usage state, the casing is rotated about the adjusting element and relative to the keyboard module, so that an included angle is formed between the casing and the lateral side of the keyboard module.

A keyboard device includes a keyboard module and a palm rest module. The palm rest module is arranged beside a lateral side of the keyboard module, and supports a wrist of a user. The palm rest module includes a pedestal, a casing and an adjusting element. The casing is disposed on the pedestal. The adjusting element is arranged between the pedestal and the casing. A position of the casing relative to the pedestal is adjustable through the adjusting element. In a first usage state, the casing is moved toward the keyboard module or moved away from the keyboard module through the adjusting element. In a second usage state, the casing is rotated about the adjusting element and relative to the keyboard module, so that an included angle is formed between the casing and the lateral side of the keyboard module.

A keyboard device includes a keyboard module and a palm rest module. The palm rest module is arranged beside a lateral side of the keyboard module, and supports a wrist of a user. The palm rest module includes a pedestal, a casing and an adjusting element. The casing is disposed on the pedestal. The adjusting element is arranged between the pedestal and the casing. A position of the casing relative to the pedestal is adjustable through the adjusting element. In a first usage state, the casing is moved toward the keyboard module or moved away from the keyboard module through the adjusting element. In a second usage state, the casing is rotated about the adjusting element and relative to the keyboard module, so that an included angle is formed between the casing and the lateral side of the keyboard module.

An operation apparatus mountable to one hand of a user includes: a first operation section that is located on a front surface side and that can be operated by the thumb of the one hand; a second operation section that is located on a back surface side and that can be operated by a finger other than the thumb; and a first contact surface with which the palm of the one hand makes contact. At least one of the first contact surface and an extension plane of the first contact surface is inclined relative to a virtual plane in such a direction as to be spaced more therefrom in going in a first direction, the virtual plane being defined by the first direction from the front surface side toward the back surface side and a second direction being orthogonal to the first direction and directed from a bottom surface side toward a top surface side.

An operation apparatus mountable to one hand of a user includes: a first operation section that is located on a front surface side and that can be operated by the thumb of the one hand; a second operation section that is located on a back surface side and that can be operated by a finger other than the thumb; and a first contact surface with which the palm of the one hand makes contact. At least one of the first contact surface and an extension plane of the first contact surface is inclined relative to a virtual plane in such a direction as to be spaced more therefrom in going in a first direction, the virtual plane being defined by the first direction from the front surface side toward the back surface side and a second direction being orthogonal to the first direction and directed from a bottom surface side toward a top surface side.

An operation device includes a hold portion having a base end and a leading end, and an operation portion attached to the leading end of the hold portion. The operation portion includes a finger rest extending substantially along a direction in which the hold portion extends from the base end to the leading end, and first to third operation switches disposed with the finger rest interposed therebetween.

An operation device includes a hold portion having a base end and a leading end, and an operation portion attached to the leading end of the hold portion. The operation portion includes a finger rest extending substantially along a direction in which the hold portion extends from the base end to the leading end, and first to third operation switches disposed with the finger rest interposed therebetween.

A track-type machine includes first and second ground-engaging track assemblies, each having a drive motor, and a propulsion system including an operator station with first and second joysticks, and a travel control system including input devices resident on the first and second joysticks. The input devices are adjustable to vary at least one of a speed or a direction of the drive motors in the track assemblies. Adjustment of the drive motor speed can be in proportion to an adjustment of the corresponding input device.