Abstract: A belt sander includes a shield, a housing, and a sanding belt. The shield includes a main plate unit and an extension plate unit. The main plate unit cooperates with the housing to define a protection space. The extension plate unit extends from the main plate unit toward the sanding belt, and cooperates with the housing to define an opening that is in spatial communication with the protection space. The extension plate unit is spaced apart from the sanding belt in a first extending direction of a first axis, and cooperates with the sanding belt to define a first gap therebetween in the first extending direction. The extension plate unit is spaced apart from the sanding belt in a second extending direction of a second axis substantially orthogonal to the first axis, and cooperates with the sanding belt to define two second gaps therebetween in the second extending direction.

Abstract: An electric wrench includes a tool head unit, a wrench body unit that defines an accommodating space extending along a first axis, an output unit that includes a head driver configured to rotate in a selected direction and output rotational energy, a handle unit, an electric unit that is operable for driving rotation of the head driver, and a control unit that is mounted on the wrench body unit. The control unit includes a display, a control module that is disposed in the accommodating space, and a battery module that is disposed in the accommodating space between the electric unit and the handle unit, and that has at least one battery configured to provide electric energy to the electric unit and the display. The electric unit, the battery module and the handle unit are arranged along the first axis.

Abstract: An electric ratchet wrench includes a tool head unit, a wrench body unit, an output unit, an electric unit, and a sensor unit. The wrench body unit includes a main body portion, and an installation portion connected between the tool head unit and the main body portion. The output unit includes a head driver mounted on the tool head unit, and being configured to rotate in a selected direction and output rotational energy. The sensor unit includes a transmitting handle pivotably connected to the main body portion, and at least one sensor module disposed between the main body portion and the transmitting handle. When the transmitting handle is driven by an external force to pivot relative to the main body portion, the sensor module outputs a torque reading of the external force.

Abstract: A scroll wheel decoder includes two fixing bases, a scroll wheel, a rotary disk, and a rotation speed sensor and a rotation direction sensor for determining the rotation amount and rotation direction of the scroll wheel respectively. The fixing bases are provided on a circuit board in a computer mouse to support the rotating shaft of the scroll wheel, for enabling the rotary disk to rotate along with the scroll wheel. The rotary disk has peripheral teeth. The rotation speed sensor projects a first detection signal to be blocked by the teeth sequentially so that a control module can calculate the rotation speed and hence rotation amount of the scroll wheel. The rotation direction sensor projects a second detection signal to the scroll wheel, and the control module can identify the rotation direction of the scroll wheel according to the signal reflected by the scroll wheel.

Abstract: A metering valve includes a valve main body consisting of a body and a cover, a sliding rod and an elastic member. The body has a positioning hole, a metering chamber, a containing space, and two sealing pads disposed on two end portions of the metering chamber. The containing space is for assembling the gas cylinder. A groove is disconnected with the positioning hole, the metering chamber and the containing space. The sliding rod has two ends, wherein a gas channel is formed from one end toward an inner of the sliding rod, the sliding rod has a flange and a through hole, the through hole under the flange is for connecting the gas channel, and the sliding rod blocks a gas from the metering chamber by cooperating with the sealing pads. The elastic member in the groove is connected to the flange and the groove.

Abstract: A pneumatic nail gun includes a nail-gun main body, a first trigger, an auxiliary handle, an insurance unit, and an auxiliary insurance mechanism. The first trigger is disposed in the nail-gun main body. The auxiliary handle is extended from the nail-gun main body. The insurance unit is disposed at a nail outlet of the nail-gun main body and being capable of shifting between a non-firing location and a location to be fired. The auxiliary insurance mechanism includes a second trigger and an insurance stopper element. The second trigger is disposed on the auxiliary handle. The insurance stopper element is disposed in the nail-gun main body. The insurance stopper element is capable of shifting between a first location and a second location as controlled by operation of the second trigger so as to selectively block a shifting path of the insurance unit.

Abstract: A nailer includes a base seat and at least one abutment member. The base seat has at least one engaging structure. The abutment member has at least two engaging portions that are spaced apart from each other, and a connecting portion that is connected between the engaging portions. The engaging structure engages detachably one of the engaging portions. Each of the engaging portions has an engaging surface that is connected to the connecting portion and that abuts against the engaging structure. The other one of the engaging portions further has an abutment surface that is opposite to the engaging surface thereof, and that is for abutting against the object.

Abstract: A status indicating device for a power nail gun includes a trigger adapted to be disposed on a gun body and having at least one transparent portion, and a light emitting module adapted to be disposed between the gun body and the trigger for emitting light through the transparent portion.

Abstract: A metering valve includes a valve main body consisting of a body and a cover, a sliding rod and an elastic member. The body has a positioning hole, a metering chamber, a containing space, and two sealing pads disposed on two end portions of the metering chamber. The containing space is for assembling the gas cylinder A groove is disconnected with the positioning hole, the metering chamber and the containing space. The sliding rod has two ends, wherein a gas channel is formed from one end toward an inner of the sliding rod, the sliding rod has a flange and a through hole, the through hole under the flange is for connecting the gas channel, and the sliding rod blocks a gas from the metering chamber by cooperating with the sealing pads. The elastic member in the groove is connected to the flange and the groove.

Abstract: A status indicating device for a power nail gun includes a trigger adapted to be disposed on a gun body and having at least one transparent portion, and a light emitting module adapted to be disposed between the gun body and the trigger for emitting light through the transparent portion.

Abstract: A nailer with an illumination device located adjacent to the muzzle thereof comprises a nailer and an illumination device. The nailer has a muzzle defined at a front end of a housing thererof, between the muzzle and the housing is arranged a panel and a protection hood covered on the panel, and on the protection hood is formed a notch aligned with the muzzle. Beneath the protection hold is disposed a circuit board, on the circuit board is battery. A positioning hole is defined in a side of the protection hood facing the housing. A buffer is disposed in the positioning hole of the protection hood in such a manner that a part of the buffer protrudes out of the positioning hole and is to be pressed against the housing. The illumination device is disposed beneath the protection hood of the nailer and located correspondingly to the notch.

Abstract: The invention is to provide a mouse having a heat dissipation arrangement, which comprises a sensor and at least one vent opening on the surface of the mouse, when one hand of a user holds and operates the mouse coupled to an electronic device, an internal fan installed within the mouse is activated to produce a current of air being guided through the vent opening to the palm in close contact with the surface of the mouse. As a result, it is possible to effectively utilize an unoccupied internal space of the mouse to produce current of air for preventing the hand of user from sweating during operating the mouse.

Abstract: A nail guide device for a power nailer includes a nose portion and a guiding member mounted to the nose portion of the power nailer by a pin passing through a orifice of the guiding member and a pivot hole of the connecting portion. The passage of the leading edge contacts against the inside of the semi-circle passage by the virtue of a first end of a spring engaging to a protrusion of the connecting portion and a second end of a spring engaging to a bulge of the guiding member.

Abstract: The present invention provides a headphone comprising at least three speakers wherein two of the speakers are held to the ears and the other speaker is in contact with parts of the head other than the ears so that sound from speakers is audible by the ears; a signal line having a conductor and a power line both coupled to each speaker so that external signals are sent to the speakers through the conductor and an external electrical power of source is applied to the speakers through the power line respectively. By utilizing this, a surround sound effect is obtained.

Abstract: A process for increasing resolution of mouse movement on computer screen comprises the steps of moving a mouse to cause two beams of light emitted from light emitting elements to be detected by photodetectors, converting the light into two sequential sinusoidal analog signals having a phase difference therebetween, activating an analog-to-digital converter (ADC) to perform an analog-to-digital conversion on the analog signals with respect to at least three predetermined references respectively, generating a series of integer in response to each analog signal passes two adjacent ones of the references, representing the series of integer as a step wave having a plurality of steps each representing an integer, and creating a coordinate comparison table with respect to the integers of the step wave, whereby there are at least six chances to determine change of coordinate with respect to a cursor moving on the screen during one movement cycle of the mouse.

Abstract: A headphone. The headphone includes at least three speakers. Two of the speakers are held to the ears and the other speaker is in contact with parts of the head other than the ears so that sound from speakers is audible by the ears. A signal line having a conductor and a power line are both coupled to each speaker so that external signals are sent to the speakers through the conductor and an external electrical power of source is applied to the speakers through the power line respectively.