Abstract: The method prevents an optical disk from being scraped by an optical apparatus of a pickup head of an optical disc drive is disclosed, it mainly includes: moving the optical apparatus of the pickup head to a detection position in which the laser-light emitted from the pickup head focuses on the optical disk; detecting the first-detection position and setting a movement boundary according to the first-detection position, wherein the movement boundary has a upper boundary and a bottom boundary; preventing the optical apparatus from moving out of the movement boundary. The present method can be implemented without installing any additional apparatus in the original video disc player, and can prevent the optical disk and the inner apparatus of the optical disc drive from being scraped or damaged by the pickup head during a read/write process to increase the service life of the optical disk and the optical disc drive.

Abstract: The method prevents an optical disk from being scraped by an optical apparatus of a pickup head of an optical disc drive is disclosed, it mainly includes: moving the optical apparatus of the pickup head to a detection position in which the laser-light emitted from the pickup head focuses on the optical disk; detecting the first-detection position and setting a movement boundary according to the first-detection position, wherein the movement boundary has a upper boundary and a bottom boundary; preventing the optical apparatus from moving out of the movement boundary. The present method can be implemented without installing any additional apparatus in the original video disc player, and can prevent the optical disk and the inner apparatus of the optical disc drive from being scraped or damaged by the pickup head during a read/write process to increase the service life of the optical disk and the optical disc drive.

Abstract: A method for compensating frequency response of an actuator in an optical disc drive is provided. The present invention utilizes the temperature sensor within the optical pick-up head to sense work temperature. When the work temperature rises to a presetting threshold value, the servo system will induce the appropriated equalizer to compensate the frequency response of the actuator according to this work temperature, such that the servo controlling of the optical disc drive can operate accurately both in the high temperature condition and in the low temperature condition.

Abstract: A method and apparatus for automatic adjustment procedure of optical drive are disclosed. The steps of the method include determining tracking error signals of the inner and the outer zone of the disk, respectively. A difference of the tracking error signal between the inner and the outer-diameter zones of the disk is calculated. The difference of the tracking error signal between the inner diameter and the outer diameter of the disc is compensated.

Abstract: The method prevents an optical disk from being scraped by an optical apparatus of a pickup head of an optical disc drive is disclosed, it mainly includes: moving the optical apparatus of the pickup head to a detection position in which the laser-light emitted from the pickup head focuses on the optical disk; detecting the first-detection position and setting a movement boundary according to the first-detection position, wherein the movement boundary has a upper boundary and a bottom boundary; preventing the optical apparatus from moving out of the movement boundary. The present method can be implemented without installing any additional apparatus in the original video disc player, and can prevent the optical disk and the inner apparatus of the optical disc drive from being scraped or damaged by the pickup head during a read/write process to increase the service life of the optical disk and the optical disc drive.

Abstract: An outer assembling mechanism of a backpack for carrying a detachable skate. The mechanism includes a base plate fixed to assembling seats. The assembling seats are adapted to releasably engage with the detachable skate for walking or to disengage with the detachable skate for skating.

Abstract: The locking device for a detachable skate of sports shoe in accordance with the present invention mainly comprises a rotatable hook, an elastic member, a lever and an engaging wall. The rotatable hook is provided on the detachable skate being adapted to releasably engaging with the engaging wall provided under the sports shoes. The elastic member is provided to bias the rotatable hook and the lever is used to rotate the rotatable hook for assembling or disassembling by means of overcoming bias force of the elastic member.

Abstract: An outer assembling mechanism of a backpack for carrying a detachable skate in accordance with the present invention mainly comprises a base plate and a plurality of assembling seats fixed thereto. The assembling seats are adapted to releasably engage with the detachable skate in walking or to disengage with the detachable skate for skating.

Abstract: The locking device for a detachable skate of sports shoe in accordance with the present invention mainly comprises a rotatable hook, an elastic member, a lever and an engaging wall. The rotatable hook is provided on the detachable skate being adapted to releasably engaging with the engaging wall provided under the sports shoes. The elastic member is provided to bias the rotatable hook and the lever is used to rotate the rotatable hook for assembling or disassembling by means of overcoming bias force of the elastic member.

Abstract: The sports shoe in accordance with the present invention mainly comprises a pivotal means, a blocking plate and a latch means. The pivotal means is adapted to pivotally connect the sports shoes to a detachable ice/roller skate and the latch means is adapted to securely lock therebetween. The blocking plate is arranged in spaced relationship with the pivotal means and a space provided therebetween is adapted to receive a pivotal hook seat of the pivotal means. The latch means includes an elastic member and a plurality of guiding studs which are used to increase the sports shoe in assembled reliability for operating the detachable ice/roller skate.

Abstract: A wheel assembly mainly comprises a pivotal seat, a locking device, a singular elastic member and a wheel. The pivotal seat includes a first end pivotally connected to a base by a mounting member for moving between an extended position and an stowed position and a second end rotatably connected to the wheel for skating. The locking device is combined with the singular elastic member as a unit, which is adapted to optionally lock the pivotal seat either in the extended position or in the extracted position by the bias force of the singular elastic member. The singular elastic member is further adapted to bias the pivotal seat for facilitating its movement between the extended position and the stowed position.

Abstract: The present invention is disclosed the wheel assembly for roller skate. The wheel assembly mainly comprises a wheel/pivotal seat, a locking means, a singular elastic member and a wheel set. The wheel/pivotal seat includes a first end pivotally connected to a base by a mounting member for moving between an extended position and an stowed position and a second end rotatably connected to the wheel set for skating. The locking means is combined with the singular elastic member as a unit, which is adapted to optionally lock the wheel/pivotal seat either in the extended position or in the extracted position by the bias force of the singular elastic member. The singular elastic member is further adapted to bias the wheel/pivotal seat for facilitating and guiding to move between the extended position and the stowed position.

Abstract: A wheel assembly for a roller skate. The wheel assembly mainly includes a pivotal seat, a singular locking member and a wheel set. The pivotal seat includes a first end pivotally connected to a sole base by a mounting member for convertibly moving between a stowed position and an extended position and a second end rotatably connected to the wheel set for skating. The singular locking member is adapted to optionally position the pivotal seat either in the stowed position or in the extended position. The singular locking member includes a main plate being adapted to structurally engage with the sole base and two teeth being adapted to lock or unlock the pivotal seat either in the stowed position or in the extended position. The wheel assembly further includes a button being adapted to actuate the singular locking member to unlock the pivotal seat.

Abstract: A base structure for a roller skate includes a base having at least two compartments, a bottom plate secured to the base, and a number of wheel assemblies each of which is mounted in an associated compartment. The bottom plate includes a number of blocks formed on the underside thereof, each block being received in an associated compartment. Each wheel assembly includes a pivotal seat having a first end secured to the underside of the bottom plate, a wheel seat having a first end pivotally connected to a second end of the pivotal seat, and a wheel rotatably mounted to a second end of the wheel seat. Each wheel seat may be pivoted to a storage position in the associated compartment when not in use. When skating is required, each wheel seat is pivoted to an operative position, in which each wheel seat bears against an underside of an associated block while the wheel rotatably attached to each wheel seat extends beyond the base for skating.

Abstract: A wheel assembly for a roller skate includes a pivotal seat having a first end secured to a base of the roller skate, a wheel seat having a first end pivotally connected to a second end of the pivotal seat by a pin, and a wheel rotatably mounted to a second end of the wheel seat. A first elastic member has a first end attached to the pivotal seat and a second end attached to a mounting member on the wheel seat for biasing the wheel seat to a storage position in the base. A stopping member includes a first end mounted to the pin and a second end through which the mounting member is extended. A second elastic member is mounted around the pin for biasing a stop of the stopping member to a position for releasably engaging with the wheel seat to prevent the wheel seat from moving into the storage position in the base when the wheel seat and the wheel are extended beyond the base for skating.

Abstract: A skate base for a roller skate is attached to a shoe sole having at least two engaging sections on an underside thereof. The engaging portions are located corresponding to front and rear ends of an arch of a wearer's foot. The skate base has engaging members formed on a top thereof for releasably engaging with the engaging sections on the shoe sole. The skate base includes several axles to which wheels are rotatably mounted.

Abstract: A wheel assembly for a roller skate includes a pivotal seat having a first end secured to a base of the roller skate, a wheel seat having a first end pivotally connected to a second end of the pivotal seat by a pin, and a wheel rotatably mounted to a second end of the wheel seat. A first elastic member has a first end attached to the pivotal seat and a second end attached to a mounting member on the wheel seat for biasing the wheel seat to a storage position in the base. A stopping member includes a first end mounted to the pin and a second end through which the mounting member is extended. A second elastic member is mounted around the pin for biasing a stop of the stopping member to a position for releasably engaging with the wheel seat to prevent the wheel seat from moving into the storage position in the base when the wheel seat and the wheel are extended beyond the base for skating.

Abstract: A wheel assembly for a roller skate includes a pivotal seat having a first end secured to a base of the roller skate, a wheel seat having a first end pivotally connected to a second end of the pivotal seat by a pin, and a wheel rotatably mounted to a second end of the wheel seat. A first elastic member has a first end attached to the pivotal seat and a second end attached to a mounting member on the wheel seat for biasing the wheel seat to a storage position in the base. A stopping member includes a first end mounted to the pin and a second end through which the mounting member is extended. A second elastic member is mounted around the pin for biasing a stop of the stopping member to a position for releasably engaging with the wheel seat to prevent the wheel seat from moving into the storage position in the base when the wheel seat and the wheel are extended beyond the base for skating.