Abstract: A power supply unit for a tattoo machine includes a power operating unit electrically connected to a power supply device. The power operating unit is electrically connected to an operating unit. The power operating unit can output a DC power and can control a current value or a voltage value of the DC power according to operation of the operating unit. A modulating unit is electrically connected to the power operating unit and the operating unit. The modulating unit modulates the DC power according to the operation of the operating unit and outputs a square wave power or the DC power. The modulating unit can control frequency or a work cycle of the square wave power according to the operation of the operating unit. An output end of the DC power supply unit is electrically connected to the tattoo machine to output the square wave power or the DC power.

Abstract: A tattoo machine includes a tubular housing and an electromagnetic assembly disposed in the tubular housing. The electromagnetic assembly includes a first through-hole extending axially therethrough. A magnet unit is disposed in the first through-hole and includes a second through-hole extending axially therethrough. A core bar extends through the second through-hole and includes a tattoo needle on an end thereof. The tattoo needle can be actuated by the magnet unit to an exposed position outside of a bottom end of the tubular housing. An electric power transmission unit is electrically connected to the electromagnetic assembly. The electric power transmission unit can be in electrical connection with a power grid or a power supply and can output alternating current to the electromagnetic assembly.

Abstract: A detection substrate includes a substrate, a wetting layer, a barrier layer, a reaction layer, a counter electrode layer, a reference electrode layer, an insulating frame, and a plurality of wirings. The substrate includes a counter electrode, a working electrode, and a reference electrode. The reaction layer is located on the barrier layer. A surface of the reaction layer has a naturally micro-etched nano pattern. The counter electrode layer has an accommodating area which accommodates the reaction layer, and the naturally micro-etched nano pattern is exposed from the accommodating area. The insulating frame is located on a measurement area. The detection substrate has electrodes. During use, a predetermined reaction potential is applied to the detection substrate by an electrochemical device, and a Raman spectroscopy analysis is performed to obtain a strengthened Raman spectroscopy signal. A Raman spectrum detection system and a Raman spectrum detection method are also provided.

Abstract: A power supply unit for a tattoo machine includes a power operating unit electrically connected to a power supply device. The power operating unit is electrically connected to an operating unit. The power operating unit can output a DC power and can control a current value or a voltage value of the DC current according to operation of the operating unit. A modulating unit is electrically connected to the power operating unit and the operating unit. The modulating unit modulates the DC current according to the operation of the operating unit and outputs a square wave power or the DC power. The modulating unit can control frequency or a work cycle of the square wave power according to the operation of the operating unit. An output end of the DC power supply unit is electrically connected to the tattoo machine to output the square wave power or the DC power.

Abstract: A composite catalyst for an electrode is described, including platinum for dehydrogenation, an element E for water dissociation, and a material MOx for stabilization of the element E, wherein x ranges from 0 to 3.

Abstract: A catalytic liquid fuel is described, including a liquid fuel added with at least one kind of catalytic ion or its salt to improve the oxidation activity thereof. The liquid fuel includes at least an organic liquid fuel or a reducing agent or their mixture. The oxidation activity of the fuel can be enhanced by adding an extremely low concentration of the catalytic ion or it salt. The catalytic liquid fuel also can overcome problems like low oxidation activity, surface poisoning and fading of catalysts.

Abstract: A ratchet device has a ratchet body, a rotating rod and a switching device. The ratchet body has a top and a central hole axially defined through the ratchet body. The rotating rod is mounted in the central hole and has a top and at least one lump notch defined on the top of the rotating rod. The switching device has a cover, a pivoting block and a switch. The cover is mounted securely on the top of the ratchet body and has a top. The pivoting block is mounted through the cover and abuts the top of the rotating rod and has a bottom and an eccentric lump. The eccentric lump protrudes from the bottom of the pivoting block and is inserted into one of the at least one lump notch. The switch is pivotally mounted in the cover and has a through hole mounted around the pivoting block.

Abstract: A key structure includes a scissors-type connecting member. The scissors-type connecting member includes a first frame and a second frame. The first frame includes a first protrusion and a second protrusion. The second frame includes a first receiving recess for accommodating the first protrusion, a second receiving recess for accommodating the second protrusion, and a partition wall between the first receiving recess and the second receiving recess. When the first frame is swung with respect to the second frame, the first protrusion is sustained against a first side of the partition wall and moved on the first side of the partition wall, and the second protrusion is sustained against a second side of the partition wall and moved on the second side of the partition wall. Consequently, the first protrusion and the second protrusion are permitted to be partially detached from first receiving recess and the second receiving recess, respectively.

Abstract: A key structure includes a scissors-type connecting member. The scissors-type connecting member includes a first frame and a second frame. The first frame includes a first protrusion and a second protrusion. The second frame includes a first receiving recess for accommodating the first protrusion, a second receiving recess for accommodating the second protrusion, and a partition wall between the first receiving recess and the second receiving recess. When the first frame is swung with respect to the second frame, the first protrusion is sustained against a first side of the partition wall and moved on the first side of the partition wall, and the second protrusion is sustained against a second side of the partition wall and moved on the second side of the partition wall. Consequently, the first protrusion and the second protrusion are permitted to be partially detached from first receiving recess and the second receiving recess, respectively.

Abstract: A composite catalyst for an electrode is described, including platinum for dehydrogenation, an element E for water dissociation, and a material MOx for stabilization of the element E, wherein x ranges from 0 to 3.

Abstract: A catalytic liquid fuel is described, including a liquid fuel added with at least one kind of catalytic ion or its salt to improve the oxidation activity thereof. The liquid fuel includes at least an organic liquid fuel or a reducing agent or their mixture. The oxidation activity of the fuel can be enhanced by adding an extremely low concentration of the catalytic ion or it salt. The catalytic liquid fuel also can overcome problems like low oxidation activity, surface poisoning and fading of catalysts.

Abstract: A light positioning frame for a back light module includes an assembly frame composed of an outer frame, a top frame extending from a side of the outer frame, a receiving space, at least one slot defined through a top face of the top face communicating with the receiving space and a first shoulder formed on a bottom face defining the at least one slot and a mask having a base, a light source cap portion extending from a free side of the base and an extension extending into the receiving space so as to be supported by the first shoulder such that engagement between the fixed frame and the mask is finished, whereby a light source received in the mask is securely sandwiched between the fixed frame and the mask and light from the light source is dimmed by the top frame.

Abstract: An illuminating membrane switch includes an upper membrane sheet and a lower membrane sheet. The lower membrane sheet includes an electroluminescent device and a plurality of lower lead wires disposed on the illuminating surface of the electroluminescent device. An insulating spacer layer is further disposed on the illuminating surface of the electroluminescent device, and separates the upper lead wires of the upper membrane sheet from the lower lead wire. When a pressing force acting on the illuminating membrane is sufficient, the upper lead wire and the lower lead wire at the pressing position can contact each other through the opening of the insulating spacer layer so as to form a closed circuit. The keyboard can light up the symbols on the surfaces of key caps by light emitted from the illuminating membrane for a user to identify the function or alphabetic input of each key cap, and detect any input from a keystroke.

Abstract: An illuminating membrane switch includes an upper membrane sheet and a lower membrane sheet. The lower membrane sheet includes an electroluminescent device and a plurality of lower lead wires disposed on the illuminating surface of the electroluminescent device. An insulating spacer layer is further disposed on the illuminating surface of the electroluminescent device, and separates the upper lead wires of the upper membrane sheet from the lower lead wire. When a pressing force acting on the illuminating membrane is sufficient, the upper lead wire and the lower lead wire at the pressing position can contact each other through the opening of the insulating spacer layer so as to form a closed circuit. The keyboard can light up the symbols on the surfaces of key caps by light emitted from the illuminating membrane for a user to identify the function or alphabetic input of each key cap, and detect any input from a keystroke.

Abstract: A waterproof structure is used with a printed circuit board, which is primarily composed of an upper layer membrane, a lower layer membrane, and an insulation layer, which are conjoined to one another. Besides, at least one first channel and second channel are provided on the upper layer membrane and the lower layer membrane respectively and correspondingly. Also, a pressure-adjusting hole, whose periphery is larger than that of the first channel and the second channel, is provided on the insulation layer corresponding to the positions of the first channel and the second channel. After the first channel, the second channel, and the pressure-adjusting hole of the insulation layer have been conjoined, a waterproof unit will be formed at a place where the contact points of the three are not connected to one another. The waterproof unit contains circulated air and prevents moisture from permeating into the circuit board thereby avoiding a short circuit of the circuit board.

Abstract: The invention provides an improved waterproof structure of a printed circuit board. The printed circuit board is primarily composed of an upper layer membrane, a lower layer membrane, and an insulation layer, which are conjoined to one another. Besides, at least one first channel and second channel are provided on the upper layer membrane and the lower layer membrane respectively and correspondingly. Also, a pressure-adjusting hole, whose diameter is larger than that of the first channel and the second channel, is provided on the insulation layer corresponding to the positions of the first channel and the second channel. After the first channel, the second channel, and the pressure-adjusting hole of the insulation layer have been conjoined, a waterproof unit will be formed at a place where the contact points of the three are not connected to one another. The waterproof unit contains circulated air and prevents moisture from permeating into the circuit board to cause short circuit on the circuit board.

Abstract: An improved keyboard structure consists of a lower plate, a membrane circuit, an upper plate, a bridge means, an elastic element and a key cap. The lower plate has a set of symmetrical first latch sections and a set of retaining sections formed at selected locations corresponding to the first latch sections. The upper plate has a set of symmetrical second apertures corresponding to the first latch sections and a set of symmetrical second latch sections corresponding to the second apertures. There are openings in front of the second latch sections for housing the retaining sections. The bridge means has a first pivotal end insertable in a biased manner into a space formed between the second latch section and the retaining sections and a second pivotal end latching to the first latch sections such that the bridge means can be assembled on the upper plate and the lower plate in single direction.

Abstract: An improved keyboard structure consists of a lower plate, a membrane circuit, an upper plate, a bridge means, an elastic element and a key cap. The lower plate has a set of symmetrical first latch sections and a set of retain section formed at selected locations corresponding to the first latch sections. The upper plate has a set of symmetrical second apertures corresponding to the first latch sections and a set of symmetrical second latch sections corresponding to the second apertures. There are openings in front of the second latch sections for housing the retain sections. The bridge means has a first pivotal end insertable in a bias manner into a space formed between the second latch section and the retain sections and a second pivotal end latching to the first latch sections such that the bridge means can be assembled on the upper plate and the lower plate in single direction. The upper plate may be pushed to move the second latch sections away from the first pivotal end for removing the bridge means.