Abstract: An impeller is provided, including a metal housing, a shaft, and a plastic member. The metal housing has a shaft mounting hole. The inner surface of the shaft mounting hole includes three or more contact points, and the contact points are closer to the shaft than other portions of the inner surface of the shaft mounting hole. The shaft passes through the shaft mounting hole and is affixed by the contact points. The metal housing divides the shaft into an upper section, a middle section, and a lower section. The plastic member passes through the shaft mounting hole and is in contact with the middle section.

Abstract: A semiconductor device includes a first contact layer, a second contact layer, an active layer, a photonic crystal layer, a passivation layer, a first electrode and a second electrode. The first contact layer has a first surface and a second surface opposite to each other. Microstructures are located on the second surface. The second contact layer is located below the first surface. The active layer is located between the first contact layer and the second contact layer. The photonic crystal layer is located between the active layer and the second contact layer. The passivation layer is located on the second contact layer. The first electrode is located on the passivation layer and is electrically connected the first surface of the first contact layer. The second electrode is located on the passivation layer and is electrically connected to the second contact layer.

Abstract: A reciprocating mechanism includes a first connecting element, a crankshaft and a second connecting element. The crankshaft includes a rotation shaft, a first following element and a second following element. The first following element is pivotally disposed on one side of the rotation shaft and movably coupled to the first connecting element. The second following element is pivotally disposed on the other side of the rotation shaft, and a first angle is formed between the first following element and the second following element. The second connecting element is movably coupled to the second following element. The first following element and the second following element are configured to rotate around the rotation shaft so as to be movably coupled to and cause each of the first connecting element and the second connecting element to reciprocate and cyclically pivot along an arc-shaped trajectory.

Abstract: A reciprocating mechanism includes a first connecting element, a crankshaft and a second connecting element. The crankshaft includes a rotation shaft, a first following element and a second following element. The first following element is pivotally disposed on one side of the rotation shaft and movably coupled to the first connecting element. The second following element is pivotally disposed on the other side of the rotation shaft, and a first angle is formed between the first following element and the second following element. The second connecting element is movably coupled to the second following element. The first following element and the second following element are configured to rotate around the rotation shaft so as to be movably coupled to and cause each of the first connecting element and the second connecting element to reciprocate and cyclically pivot along an arc-shaped trajectory.

Abstract: A magnetic coupling device includes first and second seat units, a first magnetic unit, and a releasing member. The first seat unit is adapted to be connected to a frame of a vehicle. The second seat unit is adapted to be connected to a mudguard. The first magnetic unit includes a first member disposed in the first seat unit, and a second member disposed in the second seat unit. The releasing member is connected between the first and the second seat units, and is operable between a linked state, where the second seat unit is coupled to the first seat unit with the second member being magnetically connected to the first member, and a released state, where the second seat unit is away from the first seat unit with the second member being separated from the first member.

Abstract: A magnetic coupling device includes a first seat, a second seat, a magnetic unit and a releasing member. The second seat is connected to the first seat. The magnetic unit includes a first member disposed in the first seat, and a second member disposed in the second seat. The releasing member is connected to the first seat and the second seat, and is convertible between a linked position, where the second seat is proximate to the first seat, and the second member is magnetically connected to the first member, and a released position, where the second seat is away from the first seat, and the second member is separated from the first member.

Abstract: A magnetic coupling device includes first and second seat units, a first magnetic unit, and a releasing member. The first seat unit is adapted to be connected to a frame of a vehicle. The second seat unit is adapted to be connected to a mudguard. The first magnetic unit includes a first member disposed in the first seat unit, and a second member disposed in the second seat unit. The releasing member is connected between the first and the second seat units, and is operable between a linked state, where the second seat unit is coupled to the first seat unit with the second member being magnetically connected to the first member, and a released state, where the second seat unit is away from the first seat unit with the second member being separated from the first member.

Abstract: A magnetic coupling device includes a first seat, a second seat, a magnetic unit and a releasing member. The second seat is connected to the first seat. The magnetic unit includes a first member disposed in the first seat, and a second member disposed in the second seat. The releasing member is connected to the first seat and the second seat, and is convertible between a linked position, where the second seat is proximate to the first seat, and the second member is magnetically connected to the first member, and a released position, where the second seat is away from the first seat, and the second member is separated from the first member.

Abstract: A strut fixing device includes a base plate having a bottom plate portion, a fixing hook, and a coupling frame. The fixing hook has a connecting portion connected to the bottom plate portion, a curved bending portion extending from the connecting portion, defining an opening, and being resiliently deformable, an abutting portion formed at an end of the portion that is distal from the connecting portion, and a stop portion. The abutting portion abuts against the stop portion when the abutting portion is deformed to close the opening, thereby securing a strut to the bending portion. The coupling frame is disposed on the bottom plate portion of the base plate and is adapted to engage an engaging hole of a mudguard.

Abstract: A video conference method, applied to a video conference system in a multi-way conference is provided. The video conference method includes: retrieving a first number of a plurality of terminals of the multi-way conference; determining whether at least one other terminal is requiring to join in on the multi-way conference; when the at least one other terminal is requiring to join in on the multi-way conference, increasing the first number of the terminals of the multi-way conference to a second number of the terminals; and determining a resolution of the video signal captured and transmitted by the video conference system according to the second number of the terminals. A video conference system using the video conference method, is also provided.

Abstract: A video conference method, applied to a video conference system in a multi-way conference is provided. The video conference method includes: retrieving a first number of a plurality of terminals of the multi-way conference; determining whether at least one other terminal is requiring to join in on the multi-way conference; when the at least one other terminal is requiring to join in on the multi-way conference, increasing the first number of the terminals of the multi-way conference to a second number of the terminals; and determining a resolution of the video signal captured and transmitted by the video conference system according to the second number of the terminals. A video conference system using the video conference method, is also provided.

Abstract: A fast displaceable bicycle fender plate structure includes at least a hitch and a fender plate. The hitch has a body and a coupler formed on the body to fasten a fender to a bicycle frame. The hitch further has a plate fastener which has at least one first fastening element located thereon. The fender plate has at least one second fastening element corresponding and fastenable to the first fastening element so that the fender plate can be quickly installed or removed by users without using any tool.

Abstract: A bicycle fender allowing different color selection includes a frame and a panel. The frame has a body at the periphery formed in a shape of the fender, and at least one carved out zone and at least one fastening element to be coupled with the panel to form changeable color and pattern combinations that can be selected and installed according to users' requirements and preferences.

Abstract: A fast displaceable bicycle fender plate structure includes at least a hitch and a fender plate. The hitch has a body and a coupler formed on the body to fasten a fender to a bicycle frame. The hitch further has a plate fastener which has at least one first fastening element located thereon. The fender plate has at least one second fastening element corresponding and fastenable to the first fastening element so that the fender plate can be quickly installed or removed by users without using any tool.

Abstract: A fender fastenable to a bicycle bracing post includes at least a fender body and a fastening assembly. The fender body has a front section on which a concave portion, a slit and a holding space are formed. The slit can be opened elastically to allow a bicycle rear fork to be held in the holding space. The fastening means and the fender body can be coupled and adjusted to quickly install the fender on the bicycle bracing post. As a result more space is available to hold other bicycle accessories.

Abstract: A detachable fastening apparatus for front fork accessories of bicycles to provide fast installation and removing of the bicycle accessories on the front fork of the bicycles. It includes a packing means and a coupling dock located on an accessory. The packing means has a rotary latch disk and can be anchored in a tube of the front fork. By swiveling the rotary latch disk the packing means can be fastened to the coupling dock thereby to install or remove the accessory rapidly.

Abstract: A fender fastenable to a bicycle bracing post includes at least a fender body and a fastening assembly. The fender body has a front section on which a concave portion, a slit and a holding space are formed. The slit can be opened elastically to allow a bicycle rear fork to be held in the holding space. The fastening means and the fender body can be coupled and adjusted to quickly install the fender on the bicycle bracing post. As a result more space is available to hold other bicycle accessories.

Abstract: A bicycle fender to provide multi-color combinations and selections includes a frame and a plate. The frame has a body formed in a profile of a fender and a flange extended from an inner side of the periphery with a plurality of first fastening elements formed thereon. The plate is mounted onto the frame and has second fastening elements on the periphery corresponding to the first fastening elements. Thereby the invention can provide different colors and patterns to allow users to change different colors and patterns according to their requirements.

Abstract: A detachable fastening apparatus for front fork accessories of bicycles to provide fast installation and removing of the bicycle accessories on the front fork of the bicycles. It includes a packing means and a coupling dock located on an accessory. The packing means has a rotary latch disk and can be anchored in a tube of the front fork. By swiveling the rotary latch disk the packing means can be fastened to the coupling dock thereby to install or remove the accessory rapidly.