Abstract: A keyboard device includes a keyboard module and an illumination module. The keyboard module includes plural first keys and at least one second key. The illumination module includes a light guide plate and a circuit board. The light guide plate includes plural first mapping zones and a second mapping zone. The first mapping zones are located under the corresponding first keys. The second mapping zone is located under the second key. Moreover, at least one side-view light-emitting element and at least one top-view light-emitting element are installed on the circuit board. The side-view light-emitting element emits a first light beam. The top-view light-emitting element emits a second light beam. The first light beam is extracted through the corresponding first mapping zone and transferred to the corresponding first key. The second light beam is transferred to the second key.

Abstract: A keyboard device includes a keyboard module and an illumination module. The keyboard module includes plural first keys and at least one second key. The illumination module includes a light guide plate and a circuit board. The light guide plate includes plural first mapping zones and a second mapping zone. The first mapping zones are located under the corresponding first keys. The second mapping zone is located under the second key. Moreover, at least one side-view light-emitting element and at least one top-view light-emitting element are installed on the circuit board. The side-view light-emitting element emits a first light beam. The top-view light-emitting element emits a second light beam. The first light beam is extracted through the corresponding first mapping zone and transferred to the corresponding first key. The second light beam is transferred to the second key.

Abstract: A scroll type air compressor provided by the invention utilizes an L-shape mounting frame for respectively mounting a compressor and a generator to a first mounting section and a second mounting section thereon. The generator is mounted to the second mounting section via a plate and is capable of being fine-tuned in displacement with respect to the plate, such that a second end surface of a second drive pulley of the generator can be made coplanar with a first end surface of a first drive pulley of the compressor. The position of the plate can also be adjusted up and down with respect to the second mounting section to a required position so that the distance between the drive pulleys of the generator and the compressor can be adjusted and the tension of a transmission belt can be determined.

Abstract: A manufacturing method a coating layer structure applied to a machine element includes: forming a continuous graphene structure layer on a metal substrate; and forming a coating layer on the continuous graphene structure layer for cooperatively protecting the metal substrate. The continuous graphene structure layer is disposed between the metal substrate and the coating layer to act as a buffer structure between the metal substrate and the coating layer.

Abstract: A testing system connected to a gas cylinder and includes a pressure detector, a temperature detector, and a controller. The pressure detector is configured to detect a pressure of a stored gas in the gas cylinder. The temperature detector is configured to detect a temperature of the stored gas in the gas cylinder. The controller is configured to calculate variations in the pressure and the temperature of the stored gas and to determine whether a stored state of the stored gas is present within a predetermined range according to the variances in the pressure and the temperature of the stored gas.

Abstract: An osteotome includes a connector, a first arm, a second arm, a third arm, a fourth arm and a cutting head. A coordinate system has an X axis, a Y axis, and a Z axis. The X axis, the Y axis and the Z axis are perpendicular to each other and intersect at an original point. The connector extends along the Y axis. The first arm, extending along the Y axis, connects to the second arm, extending along the plane with the X and Y axes. An angle between the first and second arms is within a range between 125 to 145 degrees. The third and fourth arms respectively extend along the Z axis and the X axis. The cutting head is parallel to the X axis and the Y axis so as to easily control the insertion angle of the osteotome for the patients with smaller face or smaller oral cavity.

Abstract: A fully automatic speed-reading trainer for which reading speed can be adjusted in a non-step fashion is provided which includes an electric motor designed to drive a relatively large gear, which is one main component of a driving assembly forming a portion of the trainer. Coaxial with the larger gear, on opposite sides thereof, are an eccentric cam and a first pulley. The eccentric cam and pulley are each provided with an axle tube, and each has a coil spring attached thereto, with each coil spring having a free end inserted into respective holes on the larger gear. When the larger gear is rotatably driven in a predetermined direction, one of the springs is tightened about one of the axle tubes, which in turn, dependent upon the rotational direction of the larger gear, drives either the eccentric cam or the first pulley.