53results about How to "Suppress abnormal noise" patented technology

There is provided a pillar trim structure. A plate-shaped slider is configured to slide on a backside of a pillar trim in a longitudinal direction. A tunnel part is provided at an upper end of the backside of the pillar trim and formed with a through-hole. A rib is provided so as to stand at one side of an entrance of the through-hole over the longitudinal direction and inclined so that one edge of the slider gets away from the pillar trim as the slider gets over the rib. The entrance is cut out in an elongated shape at an opposite side and is cut out widely so that the entrance is more inclined with respect to the pillar trim than the slider from a predetermined starting point towards the one side and the entrance abuts on the slider at the starting point.

The invention provides a check valve which comprises a valve seat component, a valve main body of a limiting part, a circular plate part, a plurality of guide parts protruding from the periphery of the circular plate part and a valve body capable of moving between the valve seat component and the limiting part and losing the valve due to dead weight, wherein fluid passages are formed in the periphery of the circular plate part by gaps between the adjacent guide parts; on the moving range part of the valve main body corresponding to the valve body, convex parts protruding from the inner side of the valve main body are arranged; the condition that the valve body rotates due to the rotation component of the fluid cannot happen in the check valve.

Abnormal noise generated while driving a piezoelectric actuator is prevented. A pulse-generation circuit is capable of selectively generating a displacement pulse and a stationary pulse as a drive pulse for application to a piezoelectric element, the displacement pulse having a duty ratio for causing a lens to be displaced by a predetermined step width, and the stationary pulse having a duty ratio for causing the lens to remain stationary in a current position. The pulse-generation circuit controls the production of the drive pulse continuously for a plurality of times within the servo control cycle, causes the displacement pulse to be produced when the remainder of a required amount of displacement is equal to or greater than a threshold value, and causes the stationary pulse to be continuously produced until the initiation of the next servo control cycle when the remainder is less than the threshold value.

The present invention relates to a liquid-sealed vibration-damping device (10). This vibration-damping device (10) is configured such that a limiting passage (24) is provided with: a body passage (25) disposed within a partition member (16); a first communication section (26) for connecting the body passage (25) and a first liquid chamber (14); and a second communication section (27) for connecting the body passage (25) and a second liquid chamber (12), and the first communication section (26) and / or the second communication section (27) is provided with a plurality of openings (31).

A drive-side part having recesses and protrusions engages in a cup-side first part having recesses and protrusions, and the drive-side part having recesses and protrusions engages in a portion of a cup-side third part having recesses and protrusions that is positioned farther toward one axial side than a dividing wall part, such that interposed therebetween is a circumferential-direction gap larger than a circumferential-direction gap formed in the engagement part of the drive-side part having recesses and protrusions and the cup-side first part having recesses and protrusions. A driven-side part having recesses and protrusions engages with a cup-side second part having recesses and protrusions, and the driven-side part having recesses and protrusions engages in a portion of the cup-side third part having recesses and protrusions that is positioned farther toward another axial side than the dividing wall part, such that interposed therebetween is a circumferential-direction gap largerthan a circumferential-direction gap formed in the engagement part of the driven-side part having recesses and protrusions and the cup-side second part having recesses and protrusions. At least one portion of the dividing wall part is disposed between the axial end faces of a drive-side transmission member and a driven-side transmission member.

Provided is a bearing device for a wheel that can realize prevention of a backlash in a circumferential direction and is excellent in workability of connection of a hub wheel and an outer joint member of a constant velocity universal joint. Further, provided is a bearing device for a wheel that can prevent deterioration in NVH characteristics, which is caused by the backlash occurring in a joint section between the hub wheel and the constant velocity universal joint or between an outer member and a knuckle, and can perform rotation torque transmission with high accuracy. The bearing device includes a recess-projection fitting structure (M) in which the hub wheel (1) and a shaft section (12), which is fitted in a hole (22) of the hub wheel (1) of the outer joint member of the constant velocity universal joint (3) are unitized together. In the recess-projection fitting structure (M), entire fitting regions among projections (35) on the outer surface of the shaft section (12) of the outer joint member and recesses (36), which fit on the projections, are brought into intimate contact with each other.