Abstract: A micro scanning mirror, including a fixed substrate, a lens, and multiple cantilevers, are provided. Each cantilever includes a piezoelectric material structure, multiple first drive electrodes, and multiple second drive electrodes. The piezoelectric material structure includes a connecting part, a folding part, and a fixed part. The connecting part connects the lens along a direction parallel to a central axis of the lens. The folding part has a bending region and multiple drive electrode regions. The fixed part is connected to the fixed substrate, and the folding part is connected to the connecting part and the fixed part. The first drive electrodes and the second drive electrodes are respectively located in the corresponding drive electrode regions in the folding part. The micro scanning mirror of the disclosure can drive a large-sized micro mirror to rotate at an appropriate rotation angle.

Abstract: A lifting device configured to adjustably hold a display device at a certain height includes a support frame configured to support the display device, a shaft, a toothed gear, and a rack secured on the support frame. The shaft includes a wide portion secured on the display device and a narrow portion carrying the toothed gear, friction between the wide portion and the narrow portion being sufficient to hold the static weight of the display device. The toothed gear meshes with the rack. An upward or downward push on the display device drives the gear to move up and down along the rack to adjust the height of the display device.

Abstract: A lifting device configured to adjustably hold a display device at a certain height includes a support frame configured to support the display device, a shaft, a toothed gear, and a rack secured on the support frame. The shaft includes a wide portion secured on the display device and a narrow portion carrying the toothed gear, friction between the wide portion and the narrow portion being sufficient to hold the static weight of the display device. The toothed gear meshes with the rack. An upward or downward push on the display device drives the gear to move up and down along the rack to adjust the height of the display device.

Abstract: A point of sale device includes a base defining an opening in a top thereof and a through hole in a bottom thereof, a motherboard mounted in the base and comprising a plurality of sockets exposed in the opening to engage with a plurality of cables, and a top cover pivotably attached to the base to shield the opening. The cables extend through the through hole.

Abstract: A point of sale (POS) device is provided that includes a main body having a receiving space, a cover that is rotatably connected to the main body for covering the receiving space, a circuit board, and a storage device that is removably mounted in the cover. The POS device further includes two displays that are mounted outside of the main body and the cover. The main body and the cover are mechanically coupled by two hinges and a lock. Two ends of each hinge are respectively connected to inner sides of the cover and the main body at a first side. The lock is provided at a second side, which is opposite the first side, to lock the cover to the main body.

Abstract: An indication circuit includes a recommended standard 232 (RS232) connector, first to fourth electronic switches, first and second light-emitting diodes (LEDs), and first to fourth resistors. When the RS232 connector outputs a first voltage, the first LED emits, when the RS232 connector outputs a second voltage, the second LED emits.

Abstract: A mounting apparatus for selectively mounting a first storage device or a second storage device in a storage rack includes a supporting frame made of a resilient material. The supporting frame includes two side brackets. Each side bracket includes a sidewall, an upper wall, a lower wall opposite to the upper wall, and a deformable abutting member formed at the upper wall. The lower walls and the upper walls of the side brackets are capable of sandwiching two opposite portions of the first storage device. When the abutting members are bent below the corresponding upper walls, the lower walls and the abutting members of the side brackets are capable of sandwiching two opposite portions of the second storage device.

Abstract: A point of sale (POS) device is provided that includes a main body having a receiving space, a cover that is rotatably connected to the main body for covering the receiving space, a circuit board, and a storage device that is removably mounted in the cover. The POS device further includes two displays that are mounted outside of the main body and the cover. The main body and the cover are mechanically coupled by two hinges and a lock. Two ends of each hinge are respectively connected to inner sides of the cover and the main body at a first side. The lock is provided at a second side, which is opposite the first side, to lock the cover to the main body.

Abstract: A mounting apparatus for selectively mounting a first storage device or a second storage device in a storage rack includes a supporting frame made of a resilient material. The supporting frame includes two side brackets. Each side bracket includes a sidewall, an upper wall, a lower wall opposite to the upper wall, and a deformable abutting member formed at the upper wall. The lower walls and the upper walls of the side brackets are capable of sandwiching two opposite portions of the first storage device. When the abutting members are bent below the corresponding upper walls, the lower walls and the abutting members of the side brackets are capable of sandwiching two opposite portions of the second storage device.

Abstract: A point of sale device includes a base defining an opening in a top thereof and a through hole in a bottom thereof, a motherboard mounted in the base and comprising a plurality of sockets exposed in the opening to engage with a plurality of cables, and a top cover pivotably attached to the base to shield the opening. The cables extend through the through hole.

Abstract: A mounting apparatus is used to mount a hard disk drive to a storage rack. The mounting apparatus includes a supporting frame and two grounding members. The supporting frame includes a handle, and two side brackets extending from opposite ends of the handle, and attached to opposite sides of the hard disk drive. Each grounding member is made of resilient and conductive material, and includes a mounting plate mounted to the side bracket, and two abutting plates extending out from two opposite ends of the mounting plate. A part of each abutting plate is exposed out of the corresponding side bracket. when the mounting apparatus mounting the hard disk drive in a storage rack, the abutting plates are sandwiched between the storage rack and the hard disk drive.

Abstract: A mounting apparatus is used to mount a hard disk drive to a storage rack. The mounting apparatus includes a supporting frame and two grounding members. The supporting frame includes a handle, and two side brackets extending from opposite ends of the handle, and attached to opposite sides of the hard disk drive. Each grounding member is made of resilient and conductive material, and includes a mounting plate mounted to the side bracket, and two abutting plates extending out from two opposite ends of the mounting plate. A part of each abutting plate is exposed out of the corresponding side bracket. when the mounting apparatus mounting the hard disk drive in a storage rack, the abutting plates are sandwiched between the storage rack and the hard disk drive.

Abstract: A supporting frame is used to mount a hard disk drive to a storage rack. The storage rack forms two protrusions protruding inwards from opposite sides of the storage rack. The supporting frame includes a handle and two side brackets resiliently connected to the handle. The side brackets are fixedly attached to opposite sides of the hard disk drive. The handle defines two locking holes. The protrusions of the storage rack are respectively engaged in the locking holes. When the handle is moved away from the hard disk drive, the handle is deformed to disengage the protrusions of the storage rack from the locking holes of the handle.

Abstract: An indication circuit includes a recommended standard 232 (RS232) connector, first to fourth electronic switches, first and second light-emitting diodes (LEDs), and first to fourth resistors. When the RS232 connector outputs a first voltage, the first LED emits, when the RS232 connector outputs a second voltage, the second LED emits.

Abstract: A supporting frame is used to mount a hard disk drive to a storage rack. The storage rack forms two protrusions protruding inwards from opposite sides of the storage rack. The supporting frame includes a handle and two side brackets resiliently connected to the handle. The side brackets are fixedly attached to opposite sides of the hard disk drive. The handle defines two locking holes. The protrusions of the storage rack are respectively engaged in the locking holes. When the handle is moved away from the hard disk drive, the handle is deformed to disengage the protrusions of the storage rack from the locking holes of the handle.

Abstract: A computing apparatus includes a housing, a data storage device, an anchor member, and a fastener. The housing confines a compartment and has a mounting wall. The data storage device is disposed in the compartment. The anchor member has a first anchoring portion fastened to the data storage device, and a second anchoring portion that extends transverse to the first anchoring portion and that extends adjacent and parallel to the mounting wall of the housing. The fastener secures removably the second anchoring portion to the mounting wall of the housing.