Abstract: There is provided a smoke detector including a first light source, a second light source surface, a light sensor and a processor. The light sensor receives reflected light when the first light source and the second light source emit light, and generates a first detection signal corresponding to light emission of the first light source and a second detection signal corresponding to light emission of the second light source. The processor distinguishes smoke and floating particles according to a similarity between the first detection signal and the second detection signal.

Abstract: The structure of a ratchet wrench has a ratchet and a brake wheel that engage with each other, and a redirecting mechanism which switchs the rotating direction of the ratchet. The redirecting mechanism has a transmission axle pivotally installed inside the brake wheel. The transmission axle has a pushing assembly for pushing the brake wheel to deviate. The pushing assembly changes its pushing direction as the transmission axle rotates, thereby changing the rotatable direction of the ratchet.

Abstract: A one-way ratchet wheel element has engaged and linked driving wheel and driven wheel in a body. The side of the body that connects with the driving wheel has a shifting space. A tooth section is provided on a wedge opposite to the shifting space. When the driven wheel rolls and engages with the tooth section, there is a resistance to the rotation of the driving wheel, forming an engagement state. When the driven wheel is away from the tooth section on the wedge, it is in the idle state.

Abstract: A one-way ratchet wheel element has engaged and linked driving wheel and driven wheel in a body. The side of the body that connects with the driving wheel has a shifting space. A tooth section is provided on a wedge opposite to the shifting space. When the driven wheel rolls and engages with the tooth section, there is a resistance to the rotation of the driving wheel, forming an engagement state. When the driven wheel is away from the tooth section on the wedge, it is in the idle state.

Abstract: A universal serial bus (USB) apparatus for lowering power consumption is provided. The universal serial bus apparatus includes a universal serial bus circuitry, a monitor unit, and a system duty clock generator. The monitor unit is used to monitor a start of frame (SOF) packet generated by the universal serial bus circuitry and generates a clock control signal accordingly. The system duty clock generator receives the clock control signal and a reference clock signal to generate a system duty clock signal. The enable or disable status of the system duty clock signal can be determined according to the SOF packet monitored by the monitor unit so as to make the universal serial bus apparatus enter into runtime idle mode to lower the power consumption.

Abstract: Provided are device for assembling groups of eyebrow beautifying needles and method therefor. The assembling device comprises a base, a sliding block including two resilient members biased between the base and the sliding block, a central fastener for fastening the sliding block on or above the base, a holding assembly comprising a plurality of clamping posts vertically disposed on the base, and a plurality of holes with the sliding blocks passed through. Groups of eyebrow beautifying needles are adapted to insert into holding heads of the clamping posts with needle tips being flush in the holding heads of the clamping posts, and the needles in each group are fastened together by soldering. Moreover, sleeves of different colors or marks may be put on the needle groups for facilitating identifying the number of needles in each group.

Abstract: A safety needle device for tattooing body and eyebrows comprises a body; a needle; a needle cover for receiving the needle; a holding cover combinable to a rear end of the needle cover; a needle clamper received in the holding cover for clamping the needle at one end and engaged to the body at another end thereof; and a telescopic element installed between the holding cover and a rear end of the needle clamper. The body has a joint; one end of the joint has a combining portion and the needle clamper has a combining block; two wedge recesses are formed at two sides of a connection area between the combining block and the joint. In the unused state, the needle and the needle clamper are received within the needle cover. An interior of the needle cover is formed with a protecting space for receiving the needle.

Abstract: A transmission system of eyebrow-beautifying device is disclosed. A lever member has two contacts at bottoms of both sides. The contacts rest on a periphery of a wear-resistant member. A pivot point of a transmission unit and the lever member is disposed above the contacts. A torque of the lever member is substantially the same as that of the transmission unit. A rate of wear between the lever member and the wear-resistant member is substantially the same as that between the transmission unit and the lever member. That is, no amplification of error or wear may exist therebetween. Hence, the prior drawback of deterioration of vibration of the motor shaft caused by serious wear of the action block is completely eliminated.

Abstract: Provided are device for assembling groups of eyebrow beautifying needles and method therefor. The assembling device comprises a base, a sliding block including two resilient members biased between the base and the sliding block, a central fastener for fastening the sliding block on or above the base, a holding assembly comprising a plurality of clamping posts vertically disposed on the base, and a plurality of holes with the sliding blocks passed through. Groups of eyebrow beautifying needles are adapted to insert into holding heads of the clamping posts with needle tips being flush in the holding heads of the clamping posts, and the needles in each group are fastened together by soldering. Moreover, sleeves of different colors or marks may be put on the needle groups for facilitating identifying the number of needles in each group.

Abstract: A transmission system of eyebrow-beautifying device is disclosed. A lever member has two contacts at bottoms of both sides. The contacts rest on a periphery of a wear-resistant member. A pivot point of a transmission unit and the lever member is disposed above the contacts. A torque of the lever member is substantially the same as that of the transmission unit. A rate of wear between the lever member and the wear-resistant member is substantially the same as that between the transmission unit and the lever member. That is, no amplification of error or wear may exist therebetween. Hence, the prior drawback of deterioration of vibration of the motor shaft caused by serious wear of the action block is completely eliminated.