摘要:
A latch mechanism includes a latching member, a button, and an elastic member for restoring the latching member. The latching member is rotatably installed in a cover unit. The latching member includes a latching portion for engaging with a base unit. The button is movably fixed to the cover unit. The button includes a slanted pushing portion for driving the latching member to rotate for disengaging the latching portion from the base unit.
摘要:
The present invention discloses a self-excitation synchronous rectification driver, which comprises a self-excitation coil, a self-excitation driver, a synchronous-signal source, a pulse transformer, a positive/negative edge detector, and a latch unit. The synchronous-signal source generates a synchronous signal to attain an external synchronous function. When the frequency is abnormal, the first and second rectifier switches of the rectification unit of the power supply are forced to turn on or turn off. Thereby, the first and second rectifier switches can turn on alternately, and the first and second rectifier switches are limited to within the highest and lowest working frequencies during the zero-load stage or the shutdown stage. Thus, the frequency of the synchronous rectification driver is under control, and abnormal voltage will not occur.
摘要:
A securing assembly includes a chassis comprising a top wall, a keyboard mounted on the top wall of the chassis, at least one securing member pivotably mounted on the chassis, and at least one elastic member. The chassis defines a positioning hole therein. The at least one securing member has a securing portion for locking the keyboard, a releasing portion for unlocking the keyboard, and a positioning portion engaging in the positioning hole of the chassis for positioning the securing member. The at least one elastic member is attached to the at least one securing member and the chassis for urging the at least one securing member to pivot, thereby unlocking the keyboard.
摘要:
The present invention discloses a method for controlling transformer excitation cycles and a circuit for controlling the same, wherein the excitation cycle and the demagnetization cycle, which determine the rise and fall of the excitation current, are modified to prevent the coil from being saturated. In the present invention, a sense current is acquired from the excitation current of the transformer coil, and a demagnetization reference value is set. The sense current is used to determine whether the excitation current is lowered to the demagnetization reference value in the demagnetization cycle. A cycle modifying circuit is used to modify the duty cycle signal output by a pulse control unit until the excitation current is lowered to a preset level.
摘要:
A latch mechanism includes a latching member, a push member, and a sliding member. The latching member is slidably installed in a cover unit in parallel to a front wall thereof. The latching member includes a hook for engaging with a base unit. The push member is slidably installed in the cover unit parallel to a sidewall perpendicular to the front wall thereof. The sliding member is connectable with the push member, and is capable of being operated to drive the push member to push the latching member for disengaging the hook of the latching member from the base unit.
摘要:
A mounting apparatus for mounting a data storage device that has a protrusion protruding from a sidewall thereof includes a mounting board, and a bracket. The mounting board includes a depressed portion for holding the data storage device. The depressed portion includes a first side wall. The bracket includes a leg member with an end pivotably mounted to the first side wall of the depressed portion of the mounting board. A first receiving slot for receiving the protrusion of the data storage device is defined in a bottom of the leg member. A drive portion is formed at a side of the receiving slot away from the end of the leg member, for cooperating with a corresponding protrusion of the data storage device when installing the data storage device.
摘要:
A cover assembly for covering a hinge (31) of a portable device includes a base (10) and a cover (20). The base (10) includes a fixing portion (11) protruding therefrom, a pair of slide protrusions (114) is formed on the fixing portion (11), and a latching slot (19) is defined in the base (10) adjacent the fixing portion (11). The cover (20) includes a pair of sliding slots (211) corresponding to the slide protrusions (114), and a hook (231) is formed on the cover (20) for engaging the latching slot (19).
摘要:
A portable computer includes a chassis, a top panel, a motherboard, and a side cover. The chassis includes a bottom panel and a side panel. The bottom panel forms a pair of restricting tabs. The top panel covers on the chassis. The top panel includes a plurality of resilient tabs. The motherboard is received in the chassis. The motherboard forms a plurality of sockets. The side cover is replaceably mounted between the chassis and the top panel, being held by the restricting tabs, the resilient tabs, and the first side panels. The side cover defines a plurality of slots for receiving the sockets of the motherboard.
摘要:
An exemplary ejection apparatus is provided for ejecting a data storage device out of a chassis. The ejection apparatus includes a pair of driving members, a connecting member, and an operating member. The operating member is slidably attached to the chassis and the connecting member. The connecting member includes a pair of second steps. The driving members are pivotably crossed together and attached to the chassis. Each of the driving members includes a driving portion with a slanting wall formed at one free end thereof, and a first step formed at the other end thereof slidably engaging with the corresponding second step. The operating member moves the connecting member to urge a scissoring movement of the driving member, with the first steps slidably engaging with the second steps. The driving portions push the data storage device out of the chassis.