Hitachi-lg Data Storage, Inc.

Hitachi Consumer Electronics Co., Ltd.

Hitachi, Ltd.

Seiji Hamaie

Yoshiaki Yamauchi

Koji Matsumoto

Shinya Asano

Nozomu Harada

Hideyuki Nagamine

Ikuo Nishida

Hisahiro Miki

Makoto Ibe

Shinya Tsubota

Sojiro Kirihara

Takayuki Fujimoto

Hideyuki Onuma

Tomoki Hirata

Seiichi Katou

Yoshihiro Fukagawa

Tatsuya Yamasaki

Kuniyuki Kimura

Yosuke Ishizuka

Shinsuke Takatsuka

An example of an optical disc apparatus includes a top case and a bottom case. The top case includes a tab extending downward from one end of the top case. The tab includes a protrusion protruding inward. The bottom case includes a lower-side folded portion formed by folding inward an upper end of one side surface of the bottom case. The lower-side folded portion includes a cantilever spring. The cantilever spring includes a spring portion extending in a vertical direction and a curved portion formed by folding inward an upper part of the spring portion. The protrusion comes into contact with the curved portion when the top case is being affixed to the bottom case and is in contact with the spring portion under a state where the top case is affixed to the bottom case.

Optical disc apparatus

An optical disk apparatus includes a tray mounting an optical disk and a casing which stores the tray so that the tray may be inserted into and ejected from the casing. The tray has a guide rail on at least one of parallel sides relative to the direction of tray insertion or ejection and for guiding the movement of tray in the direction of tray insertion or ejection. The casing has rail guides formed on a side section of the casing in opposition with the guide rails when the tray is inserted and for guiding the guide rail, and a spring member formed on a frontend of the rail guides in the direction of tray insertion or ejection to provide elastic deformation when a force toward the tray insertion direction is applied to the spring member.

Optical disk apparatus

A disc drive for suppressing warpage deformation of a disc tray generated as initial deformation during molding is provided. A supporting structure of a disc trayprovided to be inserted into and ejected from a drive housing' through a tray insertion/ejection openingis provided with guide mechanismsandwhich slidably support a tray bodyin the depth direction as viewed from the tray insertion/ejection openingin an interior space of the drive housing&#x2032;, and a protrusionwhich is slidably contacted to an upper end of the guide mechanismon a lower surface of a wing partprotruding from the tray bodyon the side where a disc protrudes in the width direction.

Optical disc drive

An optical disc drive including a conductive plate provided on a front surface of a disc tray. The conductive plate includes a structure of a hook portion at two places on the right and left and a structure of a pressure bar spring on the side end, in which the conductive plate is fixed using hook holes provided on the disc tray and the pressure bar spring presses and grounds a cabinet with the disc tray loaded in the inside of the cabinet.

Grounding structure for optical disc drive

A disc drive apparatus comprises: a spindle motorfor hold a discand for rotate it; an optical headfor conducting either one of recording or reproducing of information onto/from the disc; a driver unit for moving the optical head in a radial direction of the disc; and a unit mechanism chassisfor supporting those thereon, fixedly, wherein the spindle motor is constructed with a rotational drive means made of a magnetic circuit, a rotor portion and a rotation shaft, which define a rotation body, and a spindle motor attachment plate to hold those thereon, and the spindle motor attachment plate has a semi-circular shaped plate configuration in a part thereof, nearly fitting to an outer diameter the rotor portion, in a direction where the optical head is provided, and has a step-like structure in thickness direction of the plate thereof, within a semi-circular shaped region with respect to a line connecting between corner portions on both ends of that semi-circular shape, and also bridging over that line.

Spindle motor attachment structure for a disc drive apparatus

An optical disc apparatus, presenting recording quality without degradation by an extreme temperature rise in an objective-lens drive mechanism in an optical pickup, includes a mechanical chassis on which a disc rotation mechanism, an optical pickup, and a transfer mechanism are mounted, a decorative plate that is a plate-shaped member located between the disc and the optical pickup and fixed on the mechanical chassis, a disc tray for loading and removing the disc, a circuit board for operation control, and an apparatus housing containing the components. A recess is formed in an indented shape in a portion of the mechanical chassis facing an outer peripheral region of the disc recording surface. An incline is formed in a position close to an opening of the disc tray for mounting the mechanical chassis and opposite the outer peripheral region of the disc recording surface, and slopes gently down to the recess.

Optical disc apparatus with mechanical chassis having a recess

A housing included in an optical disc deviceincludes a top caseand a bottom case. The top caseincludes a ceiling plateand side plates. The bottom caseincludes a bottom plateand side plates. The top caseand the bottom caseare assembled and fixed to each other so that the side platesof the top case are located on the outer sides of the side platesof the bottom case. The top case is formed with a grooveand flat portionson an inner-side end portion of the ceiling plateof the top case, the grooveand flat portionsextending along bent portionsof the side platesof the top case. The flat portions shield the groove

Optical disc device

An optical disc device prevents a rail guide from falling off from a bottom case when a housing receives an impact force. The bottom caseincludes a bottom plate, a side plateand a second bottom plate. The rail guidehas a bottom surface, a side surfaceand an upper surface. The side surfaceof the rail guide is engaged with the side plateof the bottom case. The rail guide has a convex portionthat is located on the side surfaceof the rail guide, the convex portion extending from the upper surface of the rail guide and being in contact with the second bottom plateof the bottom case. The convex portionprevents the rail guidefrom falling off from the bottom casewhen the bottom caseis deformed.

From an optical disc drive, internal static electricity has to be discharged to the outside to prevent breakage of electric components such as laser diodes. A grounding spring has been used to discharge static electricity from a unit mechanism to the enclosure of the optical disc drive but it is necessary to improve the reliability of the drive in consideration of the dimensional accuracy and workability of the spring. Thus the free end of a grounding spring having a cantilever structure is shaped like an arc and an end of the grounding spring has a curved structure. This configuration improves the dimensional accuracy and workability of the spring, so that the performance of the optical disc drive can be more reliable.

The present invention provides an optical disk drive that performs a stable lock operation with a small number of components at the time of the insertion of a tray. The optical disk drive has a locking mechanism which engages the inserted tray with the chassis, a reset arm provided in the tray to return the locking mechanism to the initial state, and an engaging boss that is provided in the chassis and is engaged with the reset arm. The tray has a projecting portion for controlling the engagement position between the reset arm and the engaging boss. The projecting portion comes into contact with a back surface of the engaging boss, to control the engaging amount between the reset arm and the engaging boss to be constant.

Optical disk drive

There are provided a disk motor arranged on a chassis, an optical pickup that performs recording and reproducing of a signal from an information recorded surface of an optical disk, a pair of guide shafts arranged on the optical pickup to guide the optical pickup radially of the optical disk, adjustment screw that move at least one ends of the guide shafts in a direction substantially perpendicular to a surface of the chassis, a leaf spring arranged on a frame body to bias the one end of the guide shaft toward the surface of the chassis, and the leaf spring includes a support surface that supports the one end of the guide shaft, and a stopper portion projecting from the support surface to define a clearance between the support surface and the surface of the chassis.

Optical disk apparatus having guide shaft adjusting mechanism

The present application relates to an optical disc apparatus for carrying out at least one of recording and reproduction of signals onto or from a data recording surface of an optical disc loaded in the optical disc apparatus. The optical disc apparatus is capable of being thinned and lightened while ensuring a mechanical strength and a stiffness, and also capable of restraining sticking of a flexible printed circuit (FPC) connected to the optical pickup and reducing the sliding resistance of the FPC during movement of the optical pickup.

In a prior art slim-type high speed rotation optical disk apparatus, the side wall of the bottom chassis is bent at a bending point toward the side of the optical disk according to the configuration of the corner air window section of the chassis. According to the present invention, this bent side wall is formed so as to have a first vertical wall which is adjacent to the bending point and a second vertical wall which is adjacent to and lower than the first vertical wall. This constitutes an L-shaped vertical wall in the air window section of the bottom chassis, resulting in reduced noise.

Disclosed is a slim-type high speed rotation optical disk apparatus having a turn table for loading an optical disk thereon. As compared with conventional ones, a brake pad is located near to the front end so that the brake pad comes into tight contact with a side of the tray's front portion when the tray is inserted. This reduces the noise and vibration of the optical disk apparatus.

Optical disk apparatus having brake pad located near to front end of chassis block

In an optical disk apparatus, a feed motor for moving an optical pickup in approximately the radial direction of a disk is provided on a base, such as unit mechanism mounting member, that pivotally moves about a supporting point together with the optical pickup and a disk motor, and on the base, the feed motor is disposed at an outer circumferential position of the optical disk or at a position near the supporting point, in the projection region of the optical disk in its chucked condition.

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Kawasaki, Japan

Seiji Hamaie