Abstract: An easy assembly level includes a body, a fixing assembly, and a bubble level vial. The body defines at least one compartment. The at least one bubble level vial is positioned within the at least one compartment. The at least one fixing assembly includes a first retainer and a second retainer connectable to the body and configured for jointly retaining the at least one bubble level vial within at least one compartment. The first and second retainers are fastened to the body by at least one rivet.

Abstract: An easy assembly level includes a body, a fixing assembly, and a bubble level vial. The body defines a compartment. The fixing assembly includes a first retainer and a second retainer. The first and second retainers are releasably joinable to each other and are releasably mountable on the body. The first retainer defines a channel and the bubble level vial is received in the channel. The first retainer is inserted in the compartment and is mounted on the body. The second retainer is inserted in the compartment and is mounted on the body. The first and second retainers are releasably joined together and encapsulate the bubble level vial. The first retainer defines a first window and the second retainer defines a second window respectively.

Abstract: A handheld electronic device includes a casing; a camera unit disposed in the casing; a light sensing unit disposed in the casing; and a processing unit disposed in the casing and electrically connected to the camera unit and the light sensing unit, the processing unit determining whether the light sensing unit is covered continuously for a predetermined time period, the processing unit driving the camera unit to take a photo when the light sensing unit is covered continuously for the predetermined time period.

Abstract: A method of enhancing information security in a computer system comprises receiving an input signal, reading a starting password, comparing the input signal with the starting password for generating a comparison result, and controlling an operating status of a basic input and output system of the computer system according to the comparison result.

Abstract: A range finder is disclosed to include a housing, two spirit levels, a transceiver and a circuit board. The housing includes a first window defined therein, a second window defined therein and two fins formed thereon for contact with a first object. A phantom line, in which the centers of the windows lie, is perpendicular to a plane defined by the fins. The spirit levels are installed on the housing so that they are perpendicular to each other. The transceiver is installed in the housing. The transceiver can transmit laser to a second object through the first window. The transceiver can receive light reflected from the object. The circuit board is installed in the housing and electrically connected with the transceiver in order to receive data from the transceiver and determine the distance between the first and second objects based on the data.

Abstract: A laser leveling device includes a laser instrument disposed in a housing, a plate slidably received in the housing and a lens attached to the plate. The lens includes two or more portions having different patterns to generate different light beams when the laser instrument generates the light through either of the portions of the lens, by moving the plate relative to the housing. The plate includes an aperture movable to align with the laser instrument, to allow the light beam to selectively emit through the aperture of the plate directly, without emitting through the lens. A switch may be disposed in the housing and actuated by the plate when either the aperture or the lens of the plate is aligned with the laser instrument.

Abstract: A level includes a level vial device detachably secured to a casing without additional fasteners or tools. The casing has a hook engaged with one end of the level vial device and a spring biased latch for detachably latching the level vial device to the casing. A spring member may be used for biasing the level vial device away from the casing and for allowing the level vial device to be easily disengaged from the casing when the level vial device is released by the latch. The casing has two fences for vertically securing the level vial device to the casing.

Abstract: A level includes a level vial device detachably secured to a housing without additional fasteners or tools. A latch is rotatably secured to the housing and has a tongue for selectively engaging with and securing the level vial device to the housing. A seat and a cap are secured to the housing, the latch includes one or more spring legs rotatably secured onto a hub of the cap. The housing includes two side walls engaged with the seat for securing the seat to the plate. One or more bubble vials may further be secured to the plate with two covers.