The reaction force output device includes a drive source configured to output power to an operation portion in a direction opposite to an operating direction thereof; and a clutch mechanism interposed between the operation portion and the drive source and configured to connect and disconnect transmission of the power to the operation portion, wherein the clutch mechanism includes a first rotating body connected to the drive source side and to which the power of the drive source is transmitted, a second rotating body connected to the operation portion side, disposed coaxially with the first rotating body and configured to be relatively rotatable with respect to the first rotating body, a clutch lever rotatably supported by the first rotating body, and a plurality of engagement portions disposed at the second rotating body in a circumferential direction thereof and engaged with the clutch lever.

This power transmission device includes a motor, a worm connected to a rotating shaft of the motor, and a worm wheel engaged with the worm and disposed at an operation pedal side with respect to the worm, wherein a biasing member which biases the motor in a direction in which the worm and the worm wheel come in contact with each other when the motor is driven is disposed between the motor and a housing.

An accelerator device includes at least one drive source, a pedal lever, and a power transmission mechanism. The pedal lever is configured to move according to a pedal depressing operation. The power transmission mechanism is configured to transmit force both in the pedal lever's closing direction and opening direction to the pedal lever by driving of the drive source.

An accelerator device includes a pedal lever, at least one drive source, a power transmission mechanism, and a locking mechanism. The pedal lever operates in response to a depressing operation. The drive source is configured to exert a reaction force as a force in a returning direction to the pedal lever. The power transmission mechanism transmits a drive force from the drive source to the pedal lever. The locking mechanism is capable of regulating the operation of the pedal lever.

An accelerator device includes an inner housing, a pedal lever, an urging member, and an actuator. The inner housing is supported to the outer housing by a support member. The pedal lever is rotatably supported to the inner housing in response to a stepping operation. The urging member urges the pedal lever in a closing direction. The actuator can drive the inner housing in an opening and closing directions of the pedal lever.

An accelerator pedal device for use in a vehicle has: a housing fixed to a vehicle body; an accelerator arm that has a drum at one end and a pedal at the other end; a friction pad that has a pad shaft; and a spring that is interposed between the accelerator arm and the friction pad. The drum has an arm pivoting shaft that pivotally supports the accelerator arm and a recess that is recessed from a periphery of the drum toward the arm pivoting shaft, the friction pad has a friction part that is pressed against the recess by a spring force of the spring, the friction part has a side surface member having a side surface in an arched cross section to face the recess, and the side surface member has a contact part that is brought into point-contact with the recess of the drum.

An electronic throttle control pedal assembly includes a housing having a friction generating surface, a pedal arm, a spring carrier, and at least one spring. The pedal arm includes a hub portion and a friction generating member. The friction generating member has a lobe connected to a cross member and is positioned on a side surface of the hub portion. The cross member extends within the hub portion. The spring carrier has a friction generating portion. As the pedal arm is depressed, a portion of the spring carrier engages the friction generating portion against the cross member positioned within the hub aperture and pivotally engages a portion of the lobe of the friction generating member against the friction generating surface of the housing thereby creating at least two independent friction generating surfaces to create a hysteresis proportional to the depression of the pedal arm.

An accelerator device includes a pedal lever, a reaction force adjuster and a controller. The pedal lever operates according to a stepping operation. The reaction force adjuster is driven by an actuator, and is capable of adjusting a reaction force that is a force in a direction of pushing back the pedal lever. The controller includes a target operation amount setting unit and a drive control unit. The target operation amount setting unit sets a target operation amount, which is an operation amount of the pedal lever according to a vehicle speed. The drive control unit controls a drive of the actuator. The controller controls the reaction force according to the target operation amount so that the operation amount of the pedal lever is within a target range when switching from an automatic drive to a manual drive.

A vehicular pedal device includes a stroke characteristic control unit that controls a stroke characteristic of the vehicular pedal with respect to a pedaling force of a driver. the stroke characteristic control unit changes the stroke characteristic of the vehicular pedal to a stepped stroke characteristic when the vehicle is under automatic speed control, and the stepped stroke characteristic has a stepping force step corresponding to an override stroke position at which override of automatic speed control is started by operation of the vehicular pedal by the driver.

A pedal apparatus for a vehicle is provided. The pedal apparatus includes a pedal arm coupled to a pedal housing such that the pedal arm is rotated with respect to a first axis by an actuating force applied to a pedal pad disposed on a distal end of the pedal arm, a pressing member for applying a force to a proximal end of the pedal arm in response to the pedal arm being rotated, a pedal reaction force generating unit disposed between the pedal arm and the pressing member to generate a pedal reaction force corresponding to the actuating force, a first friction member disposed at the pressing member to contact the proximal end of the pedal arm, and a second friction member disposed at the proximal end of the pedal arm to contact an inner surface of the pedal housing.