Funai Electric Company Ltd.

Masaaki Suetsugu

Toyoshi Nogami

Tetsuo Nishidate

An optical pickup includes a light emitting component, an optical component and a base component. The light emitting component has a laser diode, a package and a holder. The package has a positioning recess formed in an outer peripheral face of the package. The holder holds the package in a fitting hole of the holder. The holder has a protrusion component that is formed in an inner peripheral face of the fitting hole of the holder and is fitted to the positioning recess of the package, and a guide component that extends from the protrusion component by a first specific height beyond an end face of the holder. The protrusion component has a width in a peripheral direction of the fitting hole that is at least equal to a width of the positioning recess of the package in a peripheral direction of the package.

Optical pickup

There is provided an optical pickup apparatus in which the collimator lens cannot be scratched before the support base for the objective lens actuator is fixed, and further dust can hardly come in and be deposited to result in contaminating the collimator lens and thereby degrading the performance for recording and/or reproduction. A pair of movement limiting wallsandfor limiting the horizontal movement of a support basefor an objective lens actuatorare formed on the upper surface of a base chassisas contact prevention means for preventing the support basefrom coming into contact with a collimator lensbefore the support baseis fixed. The movement limiting wallsandprevent the support basefrom coming into contact with and scratching the collimator lens. Each movement limiting wallhas a wall length equal to or greater than the diameter of the collimator lensto serve as a dust prevention wall, whereby dust can hardly come in and be deposited to result in contaminating the collimator lensand thereby degrading the performance for recording and/or reproduction.

Optical pickup apparatus with protected collimator lens

There is provided an optical pickup apparatus in which the assembling workability such as chucking of an LD holder by an adjusting jig and spreading of adhesive can be improved. In the optical pickup apparatus, multiple fitting portions (boss portions)formed on one of a side wall surfaceof a slide baseand an LD holderare fitted loosely into respective multiple fitted portions (hole portions)formed in the other one so that an adjustment spacerequired for adjustment of a laser diodeis ensured between each fitting portion and fitted portion. This allows the LD holderto be fixed temporarily to the side wall surfaceof the slide basewith the laser diodebeing adjustable freely, resulting in an improvement in the assembling workability such as chucking of the holder by the adjusting jig and spreading of adhesive.

Optical pickup apparatus

An optical pickup includes: a frame, having a first face formed with a groove, a second face opposite to the first face, a first hole in which a diffraction grating is disposed, and a second hole communicated with the groove and the second face; a spring plate, attached to the first face; and a spring member, including a ring portion disposed in the first hole and abutting on the diffraction grating, a first arm portion extended from an outer peripheral edge of the ring portion and inserted in the groove, and a second arm portion connected to the first arm portion and inserted in the second hole.

Optical pickup for a disk apparatus

The soldered connection of an end portion of a cable extending from each element with a main substrate is prevented from being broken. An end portion of a cable textending from a light source element LD that is fixed to a standing frameA on a slide basemovable back-and-forth in the radial direction of a disk passes through an insertion openingin the slide baseto be connected by solderingto a main substrate, and an extended portionextending from the peripheral edge of the insertion openingclose to the main substrateis formed integrally with the slide base, the clearance '&#x3b2;' between the leading end faceA of the extended portionand the main substratebeing set slightly greater than the thickness 'd' of the cable t, so that the cable t, if tensioned when positioning the light source element LD, is brought into contact with the edgeof the leading end faceA.

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Daito, Japan

Masaaki Suetsugu