Abstract: A transmission device for a photo conductor drum includes a shell, a limiting apparatus mounted in the shell and having a through hole, and a transmission shaft which is coaxial with the through hole at a beginning position. When the transmission shaft is moved axially by an external force to a pressed position, the transmission shaft is inclinable relative to the through hole, and when the external force is released, an elastic member will force the transmission shaft to move back to the beginning position. As a result, while the photo conductor drum is put into a housing of a printer, the transmission shaft can connect a driving shaft without a help of a guider for enabling the photo conductor drum to rotate steady and smoothly.

Abstract: A quick-release gear assembly includes a retaining base having a base body and an elastic arm extending from the base body and provided at a distal end thereof with a first locating portion, and a gear having a gear body and a second locating portion located at the gear body and detachably engaged with the first locating portion of the retaining base for fastening the gear to the retaining base. Accordingly, the gear can be disassembled from the retaining base conveniently by disengaging the second locating portion of the gear from the first locating portion of the retaining base for the purpose of quick replacement of the gear.

Abstract: An improved structure of light-receiving diode is disclosed. The light-receiving diode generally comprises: a support frame on which a transimpedance amplifier and a light-receiving chip having a built-in capacitor are located; and a plurality of pins. The light-receiving chip is attached to the support frame via a conducting spacer, and connected to other pins via several bonding wires. The aforesaid components and the top of the pins are packaged by a sealing adhesive. Accordingly, the manufacture process can be simplified and the noise can be reduced.

Abstract: The invention discloses a device with electrically alterable appearance including a shell having a non-display region, with a thin-film display disposed thereon to alter the appearance of the electronic device by electrically writing operation. The thin-film display maintains the present appearance of the electronic device without power supply.

Abstract: The invention provides an alignment checking structure with a checkered pattern comprising a plurality of metal squares and a plurality of non-metal squares that are arranged in alternation, in a first direction and a second direction, and the first direction is perpendicular to the second direction