Abstract: A light source device includes: a semiconductor laser configured to emit light; a coupling lens configured to convert the light from the semiconductor laser into light beam; and a holder supporting the coupling lens. The coupling lens has: an optical surface defining an optical axis; and a flange portion protruding outward in a radial direction orthogonal to the optical axis. The flange portion includes: a first flange portion having an arcuate surface centered on the optical axis; and a second flange portion having a flat surface extending along the optical axis. The holder has: a first positioning part opposing the arcuate surface in the radial direction for positioning of the coupling lens; and a first notch through which a part of the flat surface is exposed in the radial direction. At least a part of the first flange portion is bonded to the holder.

Abstract: A ball joint includes a bearing seat in the form of a resin ball seat provided within a seat-accommodating portion of a metal socket for slidably and rotatably receiving a ball portion of a ball stud. An end portion of the seat-accommodating portion through which the stud portion passes extends towards the stud portion beyond the spherical center of the ball portion. The ball seat has a covering portion formed on the outer side of a seat opening portion of a ball-accommodating portion which has a spherical shape conforming to a sliding surface of the ball portion of the ball stud. The covering portion is formed by bending the seat opening portion such that it covers the outer periphery of the opening portion of the seat-accommodating portion of the socket.

Abstract: A ball joint which is capable of ensuring the retention strength to resist a force tending to pull out or pry out a ball portion of a ball stud while ensuring sealing performance of the dust cover is provided. A ball joint 100 includes a bearing seat in the form of a resin ball seat 130 which is provided within a seat-accommodating portion 121 of a metal socket 120 for slidably and rotatably receiving a ball portion 113 of a ball stud 110. The seat-accommodating portion 121 is formed such that its end portion through which the stud portion 111 passes extends towards the stud portion 111 beyond the spherical center O of the ball portion 114. The ball seat 130 has a covering portion 133 formed on the outer side of a seat opening portion 132 of a ball-accommodating portion 131 which has a spherical shape in conformity to a sliding surface 114a of the ball portion 114 of the ball stud 110.