Abstract: An asymmetric half-bridge converter is provided. The asymmetric half-bridge converter includes a switch circuit, a resonance tank, a current sensor, and a controller. The current sensor senses a waveform of a resonance current flowing through the resonance tank to generate a sensing result. The controller determines the sensing result. When the sensing result indicates that an ending current value of a primary resonance waveform of the resonance current is greater than a predetermined value, the controller performs a first switching operation on the switch circuit. When the sensing result indicates that the ending current value of the primary resonance waveform is less than or equal to the predetermined value, the controller performs a second switching operation on the switch circuit.

Abstract: A laser target pointer comprises a case, a lighting module, a laser module, an operating module, an adjustment mechanism and a magnetic switch. The adjustment mechanism is equipped with a biaxial pivoting mechanism to adjust the position of the laser aiming point of the laser module. The magnetic switch can be magnetically attracted and detachably connected with a contact block and electrically connected to the laser target pointer. The power of the laser target pointer can be conveniently turned on or off by operating the magnetic switch. The lighting module comprises a plurality of invisible light emitting diodes having different divergence angles in order to provide different irradiation distances. The operating module comprises a plurality of luminous patterns each corresponding to an operation function, such that the user can clearly and quickly identify which one of the operation functions is currently enabled.

Abstract: A laser target pointer comprises a case, a lighting module, a laser module, an operating module, an adjustment mechanism and a magnetic switch. The adjustment mechanism is equipped with a biaxial pivoting mechanism to adjust the position of the laser aiming point of the laser module. The magnetic switch can be magnetically attracted and detachably connected with a contact block and electrically connected to the laser target pointer. The power of the laser target pointer can be conveniently turned on or off by operating the magnetic switch. The lighting module comprises a plurality of invisible light emitting diodes having different divergence angles in order to provide different irradiation distances. The operating module comprises a plurality of luminous patterns each corresponding to an operation function, such that the user can clearly and quickly identify which one of the operation functions is currently enabled.

Abstract: A laser target pointer for engaging a gun includes a body, a locating plate, a positioning block, a first fitting element and an adjustable positioning assembly. By providing the adjustable positioning assembly, the laser target pointer can be clamped to a gun with an arbitrary body width. By adjusting a position of the positioning block with respect to the locating plate, the laser target pointer can be positioned to a gun with an arbitrary transverse positioning groove. Thus, the laser target pointer can be properly assembled to any gun body having specifications within a predetermined range, and the position of the laser target pointer can be adjusted on the gun body in the extension direction, such that a single laser target pointer can be applicable to various guns with different brands, types, series or specifications.

Abstract: The present invention relates to a hot rolling high-pressure fluid descaling method and descaling apparatus. The apparatus comprises at least one descaling unit, a axial direction of a main pipe header of the descaling unit and a rolling stock transportation direction intersect. Each nozzle ejects fluid onto a surface of the rolling stock to form an impact region. The adjacent impact regions are presented in an alternate pattern on the surface of the rolling stock. The center lines of the impact regions along a longitudinal direction are spaced apart by a specific distance, and the center lines are essentially perpendicular to the rolling stock transportation direction.

Abstract: The present invention provides an improved structure of laser sight, which comprises a sight body, a block, a displacement adjusting device, and a switch. The block can be disposed flexibly to locations on one side of the sight body for fitting different type of firearms. The displacement adjusting device can control the location of a laser module inside the laser sight for changing the location of light emission of the laser module and modifying the location of the laser module. The switch is used for controlling the laser module and improving the convenience in control. By using the structure described above, the laser sight will have better practicability and sighting performance.

Abstract: The present invention relates to a hot rolling high-pressure fluid descaling method and descaling apparatus. The apparatus comprises at least one descaling unit, a axial direction of a main pipe header of the descaling unit and a rolling stock transportation direction intersect. Each nozzle ejects fluid onto a surface of the rolling stock to form an impact region. The adjacent impact regions are presented in an alternate pattern on the surface of the rolling stock. The center lines of the impact regions along a longitudinal direction are spaced apart by a specific distance, and the center lines are essentially perpendicular to the rolling stock transportation direction. The interference caused by the rebounding of the jet sprays from the adjacent nozzles is reduced. Hence, the descaling quality is improved, that is, the roll-in-scale in the surface of the products is reduced and the surface quality of the products is enhanced.

Abstract: A laser module capable of being connected onto a circuit board includes a main body having a front opening, a rear opening, and an inner wall, a focusing lens connected in the front opening, a housing mounted to the exterior of the main body and enclosing the main body, with one end of the housing corresponding to the focusing lens having a through hole and the other end having an opening to accommodate the insertion of the main body into the housing.

Abstract: A lens is provided for converting a laser beam into laser lines of uniform brightness. The lens has an emission plane through which the laser beam passes, the emission plane having a continuous incline. There is also provided a method for designing the lens.

Abstract: A lighting audio playing apparatus comprising: a printed circuit board, for bearing the following elements; a connector, disposed on the printed circuit board for being coupled to a portable storage device; a playing controller, coupled to the connector; an audio decode controller, coupled to the playing controller; at least one lighting device, coupled to the playing controller; an audio output device, coupled to the audio decode controller; and at least one function key, coupled to the playing controller; whereby while the portable storage device being inserted into the connector, the playing controller will check whether a compressed audio file stored therein or not, if there exists a compressed audio file, the playing controller will transfer the compressed audio file to the audio decode controller to decompress it then output, meanwhile, the playing controller will drive the lighting device to light various color lights.

Abstract: A lens is provided for converting a laser beam into laser lines of uniform brightness. The lens has an emission plane through which the laser beam passes, the emission plane having a continuous incline. There is also provided a method for designing the lens.

Abstract: A lens is provided for converting a laser beam into laser lines of uniform brightness. The lens has an emission plane through which the laser beam passes, the emission plane having a continuous incline. There is also provided a method for designing the lens.

Abstract: A lens is provided for converting a laser beam into laser lines of uniform brightness. The lens has an emission plane through which the laser beam passes, the emission plane having a continuous incline. There is also provided a method for designing the lens.

Abstract: A position and adjustment device for a laser module has a cylindrical body having a bore therein, the body having a first plurality of openings and a second plurality of openings that are spaced apart around the body. A laser module is positioned inside the bore. The position and adjustment device also has a plurality of bolts, with each bolt extending through a corresponding one of the first openings into the bore, each bolt having an inner end and a rotating ball provided at the inner end and providing a rolling contact with the external surface of the laser module. The position and adjustment device also has a plurality of biased pins, with each pin extending through a corresponding one of the second plurality of openings into the bore, each pin having a curved inner end that provides a point contact with the external surface of the laser module.

Abstract: A non-contact electronic level has a light source, a vial having an air bubble and positioned to be irradiated by light from the light source, a photo sensor located at a position corresponding to the air bubble at a fixed distance from the vial, with the photo sensor capturing an image of the air bubble after the vial is irradiated by the light source, and an image processing unit electrically coupled to the photo sensor and converting the image of the air bubble into an electronic level signal.

Abstract: A fixable rotary base can be fixed at one of a plurality of positions at different angles. The rotary base includes a bushing having a cylindrical ring and a locking element disposed at the circumference of the ring, and a circular buckle having a circular body and a plurality of grooves disposed along the circumference of the circular body. The locking element is seated in one of the grooves when the bushing couples the buckle.

Abstract: A lens is provided for converting a laser beam into laser lines of uniform brightness. The lens has an emission plane through which the laser beam passes, the emission plane having a continuous incline. There is also provided a method for designing the lens.

Abstract: A position and adjustment device for a laser module has a cylindrical body having a bore therein, the body having a first plurality of openings and a second plurality of openings that are spaced apart around the body. A laser module is positioned inside the bore. The position and adjustment device also has a plurality of bolts, with each bolt extending through a corresponding one of the first openings into the bore, each bolt having an inner end and a rotating ball provided at the inner end and providing a rolling contact with the external surface of the laser module. The position and adjustment device also has a plurality of biased pins, with each pin extending through a corresponding one of the second plurality of openings into the bore, each pin having a curved inner end that provides a point contact with the external surface of the laser module.

Abstract: A laser projection apparatus has an adjustment platform having a base seat, a platform portion that is adjustably coupled to the base seat, and an adjustment mechanism that is operatively coupled to the base seat and the platform portion to adjust the inclination angle of the platform portion with respect to the base seat. The apparatus also has a frame body that is connected to the adjustment platform, and a column that is suspended by the frame body and which is separated from the adjustment platform by a distance. The apparatus further includes a first projection light-source mechanism that is connected to the column and which projects a straight light that is parallel to a central axis, and a second projection light-source mechanism which is connected to the column and which projects a light ring that is transverse to the central axis.

Abstract: A holding device is removably attached to the protection bow of a pistol. The holding device has a main body, a fixing portion, an abutting portion that is pivotably coupled to the main body, and an accommodation space defined between the fixing portion and the abutting portion for receiving the protection bow.