Abstract: A laser beam path device received in a laser distance measure includes a box having a receiving unit and a first reflector respectively in two ends of the box. The first reflector is inclinedly installed and has a hole defined centrally therethrough. The receiving unit controls displacement of the laser distance measure. A driving unit is located above the first reflector and has a second reflector received therein which is located corresponding to the first reflector. An opening is defined through the driving unit and located corresponding to the second reflector. A laser unit is connected to the box and emits laser beams which pass through the hole of the first reflector and are reflected by the second reflector, and the laser beams move toward an object. The laser beam are bounced back by the object and reflected by first and second reflectors, and received by the receiving unit.

Abstract: A power supply device for a rotary distance detection device of a robot vacuum cleaner includes a base having a control board which is electrically connected to a power supply so as to control the base to move. The control board has bearings and a distance-detection circuit board on the bearings. The distance-detection circuit board is electrically connected to the control board and the power supply via the bearings so that the robot vacuum cleaner is able to work continuously without worry of replacement of batteries.

Abstract: A laser distance measure includes a box with an emitting path and a receiving path defined therein. The receiving path is a tubular path and has a reflection wall therein. A light emitting unit is located in the emitting path and emits a first beam out from the box via the emitting path. The first beam is bounced back when hitting an object and enters into the receiving path to form a second beam which passes through the receiving path and is received by a light receiver in the receiving path. The first beam is bounced back and reflected by the reflection wall so as to be successfully received by the light receiver so as to measure a short distance.

Abstract: A measurement device includes a movable member 1, an angle-detection unit 2 and a rotary unit 3. The rotary unit 3 has a shaft 31, a roller 32 and a magnetic disk 33, all of which are connected along a common axis. The outer periphery of the roller 32 rolls along the movable member 1 when the movable member 1 is pulled. There is a gap formed between the angle-detection unit 2 and the magnetic disk 33 which is located corresponding to the center of the angle-detection unit 2 so that the angle-detection unit 2 detects the angular change of the magnetic disk 33 and precisely calculates the distance that the movable member 1 moves.

Abstract: A structure of an optical path for laser range finding includes a main body and a light-emitting unit assembled in the main body. The main body has a transmitting channel, a receiving channel and a calibration channel. The light-emitting unit is assembled in the transmitting channel. The light-emitting unit emits an external optical beam and an internal optical beam. The external optical beam is emitted through the transmitting channel. The internal optical beam is emitted to the receiving channel via the calibration channel. An included angle is defined between the external optical beam and the internal optical beam. A receiver is mounted in the receiving channel. Under this arrangement, the external optical beam and the internal optical beam do not interfere with each other.

Abstract: A structure of an optical path for laser range finding includes a main body and a light-emitting unit assembled in the main body. The main body has a transmitting channel, a receiving channel and a calibration channel. The light-emitting unit is assembled in the transmitting channel. The light-emitting unit emits an external optical beam and an internal optical beam. The external optical beam is emitted through the transmitting channel. The internal optical beam is emitted to the receiving channel via the calibration channel. An included angle is defined between the external optical beam and the internal optical beam. A receiver is mounted in the receiving channel. Under this arrangement, the external optical beam and the internal optical beam do not interfere with each other.

Abstract: A laser rangefinder with single shutter includes a body and a laser-radiating board. The body has a transmitting gateway and a receiving gateway. A shutter is mounted in the transmitting gateway. The body has an adjusting gateway communicating with the transmitting gateway and the receiving gateway. The laser beam is radiated to the object via the transmitting gateway and the shutter. When the object receives the laser beam, the laser beam is reflected into the receiving gateway by the object and the laser beam goes through the receiving gateway to the laser-radiating board thereafter the laser-radiating board calculates the actual distance from the laser rangefinder with single shutter to the object. Furthermore, the adjusting gateway prevents the laser beam interfering in the operating of the laser-radiating board and the laser beam is reflected by the shutter to the laser-radiating board via the adjusting gateway for calculating a reference distance.

Abstract: A laser rangefinder with a voice control function has a housing, a voice sensor module, a measure module, a circuit board and a display module. The housing has a voice-receiving hole and a screen. The voice sensor module receives voice commands through the voice-receiving hole. The measure module produces and emits a laser beam toward an object and then receives the laser beam reflected from the object. The circuit board judges the voice command sent by the voice sensor module to activate the measure module for calculating and determining a distance between the laser rangefinder and the object based by a time interval of the laser beam traveling toward and returning from the object. The display module shows a determined result on the screen.

Abstract: A laser rangefinder with a voice control function has a housing, a voice sensor module, a measure module, a circuit board and a display module. The housing has a voice-receiving hole and a screen. The voice sensor module receives voice commands through the voice-receiving hole. The measure module produces and emits a laser beam toward an object and then receives the laser beam reflected from the object. The circuit board judges the voice command sent by the voice sensor module to activate the measure module for calculating and determining a distance between the laser rangefinder and the object based by a time interval of the laser beam traveling toward and returning from the object. The display module shows a determined result on the screen.

Abstract: A theodolite with laser indicators has a seat, a body, a rotating case and two laser indicators. The seat can be set on a tripod and has an adjustable level base. The level base can be adjusted to a virtual level. The body is rotatably mounted on the level base and has a frame and two arms. The frame has a top. The two arms respectively extend from the top of the frame. The rotating case is rotatably mounted between the two arms of the body and has a top and a bottom. The laser indicators are respectively mounted rotatably on the top and bottom of the rotating case and generate horizontal and vertical laser beams to indicate a predicted position for improved measuring accuracy.

Abstract: A pendulum-type measuring device is disclosed that includes a steel ball-type universal joining mechanism for joining a pendulum with a base, and a laser measuring assembly mounted on the pendulum wherein a swing of the pendulum can be expressed as a first component on a first plane and a second component on a second plane perpendicular to the first plane.

Abstract: A theodolite has a body, a telescope, a laser indicator, pushbuttons and a display. The laser indicator is mounted on the telescope and has a casing, a transmission device, a prism, a laser generator and a base. The transmission device is mounted in the casing. The prism is mounted on the transmission device. The laser generator is mounted in the casing and generates a laser beam refracted by the prism to aim at a target when turned on. The base is mounted between the laser indicator and the telescope and has a stationary bracket and a movable bracket. The stationary bracket is mounted to the telescope. The casing of the laser indicator is mounted on the movable bracket, which is itself mounted rotatably and slidably on the stationary bracket. The laser indicator precisely aims at a target so virtual axes can be accurately defined by the theodolite.