Abstract: A system structure with a fan module. The system structure has a housing and a fan module. The housing has a substrate with the fan module detachably installed thereon. The substrate has a plurality of guide ports, several first positioning portions and a second positioning portion. The fan module has a body, two plates and a fan unit. Each plate is detachably disposed on the body and provided with several positioning portions. When the fan module is attached to the substrate of the housing, the third positioning portions of the fan module are fixed by the first positioning portions of the substrate, and the fourth positioning portion of the fan module fits into the second positioning portion of the substrate.

Abstract: A fin is formed using a set of sectional molds, in which two material injecting units are provided to simultaneously inject two different types of raw materials into the molds, so that a blade portion and a foot pocket portion of the fin are formed at the instant of injection to produce a complete fin. The two injecting units may be separately preset or adjusted to optimal injecting time and pressure according to flow rates of the two types of raw materials in molten state, so that the molded blade portion and foot pocket portion are fully connected together to have an optimal bonding strength between them.

Abstract: A set of fasteners is adapted to fasten a motherboard on a computer housing. The motherboard has a first side, a second side, and a fastener slot that extends through the first and second sides. Each of the fasteners includes a positioning member and a spring arm. The positioning member permits movement of the motherboard from an unlocking position, where a periphery of the fastener slot is disengaged from the positioning member, and a locking position, where the periphery of the fastener slot is engaged within a groove in the positioning member. The spring arm is connected to the positioning member so as to be adapted to abut against the motherboard to urge the motherboard to engage the positioning member when the motherboard is at the locking position.

Abstract: A computer housing includes a frame, a fixed plate mounted in a space confined by the frame and formed with a plurality of slots, and a board-mounting plate mounted slidably and detachably on the fixed plate and formed with a plurality of stamped tabs. The board-mounting plate is slidable to a locking position where each tab engages a periphery of a respective one of the slots.

Abstract: A set of fasteners is adapted to fasten a motherboard on a computer housing. The motherboard has a first side, a second side, and a fastener slot that extends through the first and second sides. Each of the fasteners includes a positioning member and a spring arm. The positioning member permits movement of the motherboard from an unlocking position, where a periphery of the fastener slot is disengaged from the positioning member, and a locking position, where the periphery of the fastener slot is engaged within a groove in the positioning member. The spring arm is connected to the positioning member so as to be adapted to abut against the motherboard to urge the motherboard to engage the positioning member when the motherboard is at the locking position.

Abstract: A strap fastener of a swimming flipper uses the resilience of a spring to press a wedge block of a wedge block set and a bevel of a main body to tightly depress the fastening strap of the swimming flipper. For fastening, the said flipper fastening strap goes vertically into the fastener to improve the fastening method of bending the traditional fastening strap reversely at 180°, to eliminate the situation of bending and cracking generated after a certain period of application and to increase the useful life of the present invention. Moreover, the fastening strap of the swimming flipper of the present invention goes vertically into the fastener, closely attaches to the main body of the swimming flipper and turns along with the direction of flowing water during swimming or diving to thereby reduce the water resistance and enhance the diving efficiency.