Abstract: A fastener is adapted for assembling a first housing to a second housing. The first housing is provided with a protruding portion and a buckling portion, and the second housing has a first surface, a second surface, and a through hole. The fastener includes a first portion, at least one connecting portion, at least two elastic portions, and a second portion. The first portion movably abuts against the first surface and has a first opening. The connecting portion is accommodated in the through hole. One end of the connecting portion is connected to the first portion. The connecting portion is spaced apart from an inner edge of the second housing by a gap. The two elastic portions inclinedly extend into the first opening. The second portion movably abuts against the second surface and is disposed at the another end of the connecting portion.

Abstract: A modular mat includes a first mat assembly including two first mat modules and a first adjoining element. The first mat module includes first bottom tubes and first top tubes. The first bottom tubes are parallel and spaced apart. The first top tubes are secured to a top of the first bottom tubes and perpendicular thereto. Each first bottom tube includes a first hole. Each first top tube includes a first hole member. The first adjoining element includes an elongated first body and parallel first adjoining rods extending from both sides of the first body respectively. The first adjoining rods are inserted into the first hole members of one first mat module and the first hole members of the other first mat module respectively so that the first mat modules are configured to releasably join together by the first adjoining element. It is easy to transport the disassembled mat.

Abstract: An over-temperature protecting apparatus and an over-temperature protecting method thereof are provided. The method includes following steps: detecting the temperature of the over-temperature protecting apparatus to obtain an adjusting signal and outputting the adjusting signal to a current detection pin of the control chip; adjusting the duty-ratio of the pulse-width modulated signal by the control chip output from the gate output pin according to the adjusting signal received by the current detection pin.

Abstract: A driving circuit of a light emitting diode (LED) includes a rectifier unit, a voltage-dividing circuit, a control unit, a voltage converter, a resistance and a capacitor. The rectifier unit rectifies an AC power to generate a first operation voltage. The voltage-dividing circuit generates a voltage-dividing signal. The control unit includes a regulating unit and a pulse width modulation (PWM) unit. An output terminal of the regulating unit is coupled to the PWM unit. The PWM unit outputs a PWM signal. The voltage converter adjusts a driving voltage and a driving current of the LED. The resistance is coupled between an output terminal of the regulating unit and a diode. The capacitor is coupled between a power input terminal of the regulating unit and a ground terminal. The PWM unit adjusts the PWM signal according to the voltage-dividing signal and a feedback signal output by the voltage converter.

Abstract: The string curtain has a hanging rack, multiple strings, multiple beads. The hanging rack has multiple hanging holes. The strings are hung on the hanging rack, and each string has a hanging head and a mounting head. The hanging head is mounted around the top end of the string, and mounted through one of the hanging holes, and protrudes a fastening tab toward the bottom end of the string, and fastened on the hanging hole of the hanging rack. The mounting head is mounted around the bottom end of the string. The beads are mounted slidably on the strings from the mounting head. Each bead has an inner diameter smaller than the outer diameter of the string for securely mounted around the string, and may be relocated a new pattern easily.

Abstract: A driving circuit of a light emitting diode (LED) includes a rectifier unit, a voltage-dividing circuit, a control unit, a voltage converter, a resistance and a capacitor. The rectifier unit rectifies an AC power to generate a first operation voltage. The voltage-dividing circuit generates a voltage-dividing signal. The control unit includes a regulating unit and a pulse width modulation (PWM) unit. An output terminal of the regulating unit is coupled to the PWM unit. The PWM unit outputs a PWM signal. The voltage converter adjusts a driving voltage and a driving current of the LED. The resistance is coupled between an output terminal of the regulating unit and a diode. The capacitor is coupled between a power input terminal of the regulating unit and a ground terminal. The PWM unit adjusts the PWM signal according to the voltage-dividing signal and a feedback signal output by the voltage converter.

Abstract: An expansion screw has at least three folding sections to provide a bracing effect. It includes an anchor nail and a bolt. The anchor nail has a tubular body formed by rolling a plate and an action zone in the middle portion. The action zone has a plurality of longitudinal slots and a plurality of strips. Each strip has a first section, a second section and a third section. After the expansion screw receives an action of a tensile force tool, the second section, due to having a upper end and a lower end that are weaker, can channel and concentrate stress to generate a bending and drive the first and third sections to bend in desired directions. Thereby the second section is folded over the first section and the third section presses the first section to form a bracing effect. The folding and bracing of the material can prevent defective construction and damage caused by excessive compression on the rim of the construction hole.

Abstract: An improved expansion screw and particularly an expansion screw for securely anchoring on various types of solid walls and hollow walls mainly includes a bolt and a nail tube. The nail tube has a front end fastened to a nut, a middle portion formed at least one expansion section which has carved slots formed thereon in an annular manner, and at least one -shaped slot formed annularly between the nut and the expansion section. Each -shaped slot has an expansion flap located therein. Every two neighboring -shaped slots are bridged by a longitudinal connection strip to form a bend section. When the bolt nut at the front end of the bolt is turned and driven to generate an inward compression, the expansion flap is forced to extend outwards and overlap with the annular ring at the front end of the nail tube, and the longitudinal connection strip is bent outwards on the bend section to form a double compression on the inner side of a construction hole in a wall to form a secured coupling.

Abstract: An improved expansion screw and particularly an expansion screw for securely anchoring on various types of solid walls and hollow walls mainly includes a bolt and a nail tube. The nail tube has a front end fastened to a nut, a middle portion formed at least one expansion section which has carved slots formed thereon in an annular manner, and at least one -shaped slot formed annularly between the nut and the expansion section. Each -shaped slot has an expansion flap located therein. Every two neighboring -shaped slots are bridged by a longitudinal connection strip to form a bend section. When the bolt nut at the front end of the bolt is turned and driven to generate an inward compression, the expansion flap is forced to extend outwards and overlap with the annular ring at the front end of the nail tube, and the longitudinal connection strip is bent outwards on the bend section to form a double compression on the inner side of a construction hole in a wall to form a secured coupling.

Abstract: An expandable body of expansion bolt comprises an upper section having a hollow upper circular member including a cut and a connection member coupled to the upper section, and a hollow lower circular member including a cut and a dent with the connection member received therein; a middle section having a plurality of parallel longitudinal slots; and a lower section having a plurality of substantially rectangular members on a lower portion. In operation, a piece of object is fastened between lower portion of the lower section and the middle section by driving the bolt in response to an insertion of the bolt through the body and the piece of object. A variety of configurations of upper section and circular members are provided for enhancing the positioning of the expandable body and guiding of the thread of bolt.

Abstract: An expandable body of expansion bolt comprises an upper section having a hollow upper circular member including a cut and a connection member coupled to the upper section, and a hollow lower circular member including a cut and a dent with the connection member received therein; a middle section having a plurality of parallel longitudinal slots; and a lower section having a plurality of substantially rectangular members on a lower portion. In operation, a piece of object is fastened between lower portion of the lower section and the middle section by driving the bolt in response to an insertion of the bolt through the body and the piece of object. A variety of configurations of upper section and circular members are provided for enhancing the positioning of the expandable body and guiding of the thread of bolt.

Abstract: A rotary unit and illumination unit for a 3-side variable advertisement display board is disclosed. It has a frame made up of a lower groove and two lateral hollow tubes and fixed to a supporting leg by welding. Light tubes are fixed inside triangular hollow columns by rubber pads screwed to an upper member. A cross-head shaft passing through the worms of a worm gear disposed inside a lower supporting member and connected to a rectangular axle on top of the lower supporting member, is joined to a gearing wheel which driven by a driving wheel actuated by a motor, will cause the movement of the cross-head shaft, resulting in the rotation of the triangular hollow columns. An ultra-red ray sensor is used to signal the stop movement of the triangular hollow columns, a timer and a rectifier are used to preset and control the regular movement of the triangular hollow columns.

Abstract: The present invention is concerned with an innovative design of venetian blind providing the functions of sun screening, light regulating, the prevention of burglary and beautiful appearance; in particular, the one which is easy to be assembled by consumers themselves. It is to unite and fix a lot of supporting seats in equal spacing on a fixed guide rail and then connect serially with a regulating shaft which is combined with a regulating wheel; the supporting seats are combined with a slat respectively and the top end of the slat is restricted and positioned by two fixing plates which allows the slat to turn. The regulating shaft is driven to rotate by the regulating wheel and then the supporting seats would drive in turn the slats to turn to adjust the angle of the slats of the venetian blind.