Abstract:
An engaging head implemented in a movement converting mechanism to engage with a screwed rod comprises an attachment body, a gear part, and a resilient pre-loading element. The attachment body has a pushing sidewall. The gear part has an inner surface facing the pushing sidewall of the attachment body, and an opposite outer surface provided with gear teeth. The resilient pre-loading element is mounted between the pushing sidewall of the attachment body and the inner surface, and has a side abutting against the pushing sidewall and another side abutting against the inner surface of the gear part. Being compressed between the pushing sidewall and the inner surface, the resilient pre-loading element thereby exerts a pre-loaded engagement pressure that results in a deflection of the gear part to ensure an adequate engagement of the gear teeth with the screwed rod.
Abstract:
The present invention relates to an apparatus for connecting a transmission device to an optical pick-up. The transmission device includes a connecting unit and a lead screw and a driving unit. The connecting unit includes a main portion, an elastic portion, a tooth-like portion and a restriction portion. The restriction portion limits the elastic portion to move within a range of a first value. The lead screw engages with the tooth-like portion. A maximum engagement depth between the lead screw and the tooth-like portion is a second value. The second value is larger than the first value to prevent the lead screw and the tooth-like portion from disengaging.
Abstract:
A lower inertial compact disc drive includes a rotary needle, a rotary driving device and a straight movement device. The rotary needle is installed below a read and written surface of the disc, and a center of the rotary needle is installed with a fixed reflector. The selected positions at two sides thereof are installed with a movable reflector and a balance block; and a straight movement device for controlling the reflector and the balance block to move oppositely along a straight path on the rotary needle so as to control the alternation of the reading optic path. The rotary driving device has a small inertia, and thus a small power motor may serve the object. Similarly, the movable reflector, convex lens, and balance block are light and a small power servomotor can be used. Consequently, the power is saved greatly.
Abstract:
A mechanical transmission of an optical pick-up head is disposed inside the casing of an optical disk drive for sliding the optical head between a worm shaft and a pressing block, which has a flexible embedded section; wherein the pressing block has a pair of elastic arms and the front end of the elastic arm has an embedded section for embedding the worm shaft; an elastic plate, with one of its end being pressed against the embedding section, and the other end being pressed by the embedded section, by means of the elasticity, the embedded section is also embedded into the worm shaft by elastic pressing. In the sliding movement of the optical head, or the rotating worm shaft brings the embedded section into movement until it ends its journey, the pressing embedded section is detached from the worm shaft. Alternatively, when the worm shaft reverses its rotation, the embedded section will be embedded into the warm shaft again by pressing. Such arrangement allows the optical pick up head of the optical drive to slide in a fast and stable manner.
Abstract:
A drive-force transmitting mechanism includes a drive disk and a driven disk that are rotatable about an axis. The driven disk has two diametrically opposing engagement portions. The drive disk has two levers pivotally mounted thereon, each lever having a clutch pin formed thereon. The two disks are disposed so that the levers are sandwiched between the two disks. The levers are operatively coupled through a coupling member such that rotation of one lever is transmitted to the other. A cam member has a groove that guides a pin member of one lever such that when the drive disk rotates through a first angle, the pins move toward the axis to engage the engagement portions to transmit rotation of the drive disk to the driven disk, and when the drive disk rotates through another angle, the pins move away from the axis to disengage from the engagement portions.
Abstract:
A skew adjustment mechanism for an optical pick-up used in an optical disc drive is disclosed, in which the optical pick-up is freely movable in a radial direction of an optical disc along a guide rod for playing back or recording and playing back information recorded on the optical disc. The optical pick-up includes a pick-up base having a first end and a second end opposite to the first end, the first end being slidably connected to the guide rod. The tangential skew adjustment mechanism includes a pick-up base displacement mechanism provided on the second end of the pick-up base for rotationally displacing the pick-up base about an axis of the guide rod. The pick-up base displacement mechanism includes a screw which vertically passes through the second end of the pick-up base such that a lower end portion of the screw which protrudes from the bottom surface of the pick-up base is in contact with a sliding surface which is positioned a prescribed distance below the bottom surface of the second end of the pick-up, whereby the pick-up base can be displaced by adjusting the protruding length of the lower end portion of the screw to achieve tangential skew adjustment.
Abstract:
A disc transport member whose width for mounting of a disc is smaller than the diameter of the disc is inserted into and removed from a drive main body while being mounted with the disc. A disc protection member is provided, so as to face the disc, on an edge of the disc transport member or a region close thereto on a side where the disc that is mounted on the disc transport member projects.
Abstract:
A recording medium playback device is provided which comprises: a recording medium accommodation unit for accommodating a plurality of recording mediums in a stacked array; a carriage chassis having at least a pickup, a turntable and a pickup moving means, the pickup moving means being adapted to move the pickup in the direction of playing back the recording medium; a moving means for moving the carriage chassis from a standby position to a position between the recording mediums accommodated in the recording medium accommodation unit to play back the recording medium; and a recording medium loading means for loading the recording medium inserted from outside into the recording medium accommodation unit; wherein when the carriage chassis is in the standby position, the pickup is situated on a vertical tangential plane which is tangent to an outer circumferential edge of the recording medium on the carriage chassis side at a point where the outer circumferential edge is intersected by a loading center line of the recording medium when the recording medium is completely loaded in the recording medium accommodation unit by the recording medium loading means.
Abstract:
A sled apparatus for an optical head frame of an optical disk drive consists of a lend screw, an elastic element and two opposing racks located on an upper side and a lower side of the lend screw. The racks have respectively one end fixedly fastened to the optical head frame and another end engaged with each other through the elastic element for the two racks to clamp the lend gear and engage with screw threads of the lend gear such that two ends of the lend screw subject to reduced pre-load force and friction force incurred to the lend screw during rotation also decreases. As a result, rotation can be transmitted to the lend screw smoothly and reliably to move the optical head frame rapidly and smoothly.
Abstract:
A disk device including a movable portion which supports pivotally and enably to swing a feed screw axis, a thread motor to drive a small gear and the like which engage with a gear interlocked in an end portion of the feed screw axis thereby to rotate the feed screw axis, and a control screw to perform a height control of the movable portion.