Patent ID: 7291942

Claim:
An autofocus actuator, comprising: a holder having a hollow body portion having one end to which a lens is attached; a coil fixedly secured to the holder in such a manner as to surround the hollow body portion of the holder; a pair of leaf springs respectively provided on opposite end sides of the hollow body portion of the holder for supporting the holder displaceably in an optical axis direction of the lens with the holder being positioned in a radial direction; and a yoke having a permanent magnet provided in a confronting relationship with the coil, the yoke adapted to adjust the position of the lens attached to the holder in the optical axis through the use of interaction between a magnetic field of the permanent magnet and a magnetic field generated by the coil as the coil is supplied with electric power, wherein the yoke has an end surface that makes contact with the leaf spring positioned on the other end of the hollow body portion of the holder, and the end surface of the yoke is integrally formed with an increased bonding surface for retaining the leaf spring with an adhesive; wherein the increased bonding surface comprises at least one tab-shaped portion integrally formed with the end surface of the outer cylindrical portion of the yoke in such a manner that the tab-shaped portion remains flush with the end surface of the outer cylindrical portion and extends outwardly from the outer cylindrical portion.