Abstract: An antenna device includes a casing, a circuit board, and an antenna. The casing has a positioning structure. The circuit board is disposed in the casing. The antenna is disposed in the casing and includes a main body portion and a connection portion connected to each other. The connection portion is connected to a surface of the circuit board. The main body portion is extended on a plane defined by a first axial direction and a second axial direction. The first axial direction is perpendicular to the surface and the second axial direction is parallel to the surface. The main body portion is positioned on the positioning structure and separated from the circuit board.

Abstract: A semiconductor structure includes a first device and a second device. The first device includes: a first gate structure formed over an active region and a first air spacer disposed adjacent to the first gate structure. The second device includes: a second gate structure formed over an isolation structure and a second air spacer disposed adjacent to the second gate structure. The first air spacer and the second air spacer have different sizes.

Abstract: A control circuit of a power converter and a control method thereof are provided. The control circuit includes an error amplifier, a controller, a digital filter, and a digital pulse width signal modulator. The error amplifying circuit is coupled to an output terminal of the power converter and provides a digital error signal. The controller provides a first working parameter corresponding to the first external control command when receiving a first external control command. The digital filter generates a current digital compensation value. The digital pulse width signal modulator generates a pulse width modulation signal. The controller provides a second working parameter corresponding to the second external control command when receiving a second external control command. The controller calculates a transition value according to the second working parameter and the current digital compensation value. The controller provides the second working parameter and the transition value to the digital filter.

Abstract: A steering apparatus includes a first joint disposed on a control rod that extends rotatably through a head tube, two second joints disposed respectively on two suspension units, and two connecting bars each connected between the first joint and a respective one of the second joints. The first joint includes a seat disposed fixedly on the control rod, at least one first rotating member having a central axis and rotatable on the seat about the central axis of the first rotating member, and at least one second rotating member having a central axis and rotatable on the first rotating member about the central axis of the second rotating member. The axes of the first and second rotating members of the first joint are perpendicular to each other.

Abstract: A steering apparatus includes a first joint disposed on a control rod that extends rotatably through a head tube, two second joints disposed respectively on two suspension units, and two connecting bars each connected between the first joint and a respective one of the second joints. The first joint includes a seat disposed fixedly on the control rod, at least one first rotating member having a central axis and rotatable on the seat about the central axis of the first rotating member, and at least one second rotating member having a central axis and rotatable on the first rotating member about the central axis of the second rotating member. The axes of the first and second rotating members of the first joint are perpendicular to each other.

Abstract: A steering device for steering front wheels of a four-wheeled vehicle is disclosed, comprising a steering wheel, a steering column, a lower column, and a steering gear box. The lower column is coupled via universal joints to the steering column and the steering gear box. The steering gear box includes a housing in which a rack and a screw rod are accommodated. The rack has an end coupled via a spherical joint to a tie rod, which is jointed to the front wheel. The spherical joint includes an anti-loosening washer. The housing has an inside surface forming a step over which a sleeve is fit for being engageable with the anti-loosening washer of the spherical joint to form a constraint to an inward travel of the spherical joint of the tie rod into the housing so as to set a constraint to steering angle of the front wheel.

Abstract: A steering device for steering front wheels of a four-wheeled vehicle is disclosed, comprising a steering wheel, a steering column, a lower column, and a steering gear box. The lower column is coupled via universal joints to the steering column and the steering gear box. The steering gear box includes a housing in which a rack and a screw rod are accommodated. The rack has an end coupled via a spherical joint to a tie rod, which is jointed to the front wheel. The spherical joint includes an anti-loosening washer. The housing has an inside surface forming a step over which a sleeve is fit for being engageable with the anti-loosening washer of the spherical joint to form a constraint to an inward travel of the spherical joint of the tie rod into the housing so as to set a constraint to steering angle of the front wheel.

Abstract: A cushioning mechanism for a sprocket of an all terrain vehicle which includes: a sprocket and a fixed seat, wherein the sprocket has a first side and a second side, the first side is provided with a plurality of tubular members in each of which is fitted a bushing, and the fixed seat is mounted on the second side of the sprocket by fasteners extending through the fixed seat and the bushing to engage with nuts, whereby when the all terrain vehicle travels on rough terrain, the bushing will effectively absorb impact to the sprocket thereby preventing the sprocket from either pulling a chain to make it longer or even breaking the chain.