Abstract: A screw structure is disclosed herein. It comprises a fastening member having a thread part and a magnetic layer formed on a surface of the thread part.

Abstract: An auxiliary eyeglass frame is provided with a position-adjustable device pivotally securing to the bridge. The position-adjustable device includes a mounting block, at least one magnetic piece is provided in the mounting block, two through bores are respectively provided adjacent to the left side and right side of the at least one magnetic piece, each through bore is provided to receive one fixing piece and one pivotal connecting article, and the pivotal connecting articles are disposed on the bridge of the auxiliary eyeglass frame.

Abstract: A movable magnetic coupling system is provided for securing a one-piece lens to a cap visor. The movable magnetic coupling system includes a magnet-receiving block inlaid in a cap visor and a protruding member pivotally assembled with a universal connector thereon and mounted on the top rim of a one-piece lens. The magnet-receiving block is provided with sliding grooves therein, and at least one strong magnetic article is provided in each sliding groove. The protruding member is provided with a screwing hole therein for pivotally assembling with the universal connector, which is provided with at least one strong magnetic article therein, so as for the one-piece lens convenient to be pivotally and movably coupled to the cap visor by the mutual magnetic attractive force of the magnetic articles in the sliding grooves and in the universal connector.

Abstract: The eyeglass frames with hidden magnetic attachment structutre include a primary eyeglass frame and an auxiliary eyeglass frame. The primary eyeglass frame is provided with a groove in the specific bottom portion, the bridge or each hinge, at least one magnetic article is provided in the groove, and a pad is provided at the bottom of the magnetic article. The auxiliary eyeglass frame is provided with a reverse U-shaped block at the specific portion, the bridge or each end, and at least one magnetic article is provided in each leg portion of the reverse U-shaped block.

Abstract: The eyeglass frames with hidden magnetic attachment structutre include a primary eyeglass frame and an auxiliary eyeglass frame. The primary eyeglass frame is provided with a groove in the specific bottom portion, the bridge or each hinge, at least one magnetic article is provided in the groove, and a pad is provided at the bottom of the magnetic article. The auxiliary eyeglass frame is provided with a reverse U-shaped block at the specific portion, the bridge or each end, and at least one magnetic article is provided in each leg portion of the reverse U-shaped block.

Abstract: A coupling system for securing an illuminating light to a cap visor includes one coupling piece with at least one magnetic article inlaid in the cap visor and one coupling block with at least one magnetic article therein so as for the coupling block convenient to be securely coupled to the cap visor by the mutual magnetic attractive force of the at least one magnetic article inlaid in the coupling piece and the at least one magnetic article in the coupling block. In the bottom of the coupling block is pivotally connected with a pivotal connector, and in the bottom of the pivotal connector is provided with a hollow for receiving a jointing ball on the top of an illuminating light which can be adjusted to proper degrees for illumination.

Abstract: A magnetic coupling system for securing a temple to an eyeglass hinge includes a pivotal flange on the rear end of the eyeglass hinge and one clipping structure formed on the front end of the temple. One coupling magnet is provided in the pivotal flange of the eyeglass hinge. The clipping structure includes a pair of opposed pivotal flanges spaced one from the other to capture the pivotal flange of the eyeglass hinge therebetween and two magnets respectively secured in the pair of opposed pivotal flanges for respective magnetic coupling to the coupling magnet in the pivotal flange of the eyeglass hinge. Therefore, the temple is pivotally coupled to the eyeglass hinge in a magnetically reinforced manner.

Abstract: A coupling system in the present invention is provided for securing an eyeglass frame to a cap visor. The coupling system includes at least one coupling magnetic article inlaid in the cap visor and a protruding member provided with at least one coupling magnetic article therein and mounted on the top rim of the eyeglass frame so as for the eyeglass frame convenient to be securely coupled to the cap visor by the mutual magnetic attractive force of the at least one magnetic article inlaid in the cap visor and the at least one magnetic article in the protruding member.

Abstract: A loudspeaker comprising a T-shaped disc, a magnetic iron disc, a disc-shaped base, a voice coil, and a cone-shaped diaphragm, the two discs and the base having air holes to communicating with one another after being assembled together, the T-shaped disc being able to be rotated to change the position of its air holes to communicate with the air holes in the magnetic disc and the base in various degrees to change the volume of the air compressed by the diaphragm to flow through the holes.