Abstract: A disc driving device includes a rotor assembly including a cylindrical rotor frame, a magnet arranged inside the rotor frame concentrically therewith so as to form a cylindrical space, a shaft fixed at one end thereof with the center hole of the shaft holder formed at the rotation center of the rotor frame, and a bearing for supporting the rotor assembly. The center hole of the shaft holder includes a small-diameter portion at the bottom thereof in the axial direction of the shaft, and an inclined portion which is formed above the small-diameter portion in such a manner as to be tapered and expanded upward in the axial direction. The shaft holder and the shaft have a void therebetween, which is filled with ultraviolet curing adhesive so as to form an adhesive fastening portion.

Abstract: In a separation preventing mechanism used in a brushless motor, an insertion section is formed into a separation preventing member (5) using resin, which has a form difficult to shape with a metal pressed part, and to which a latching member (4) can be inserted by combining rotation and shaft-direction insertion, making it easy to disassemble it after assembly and size adjustment.

Abstract: The disc-driving unit is formed of a rotor having a turntable on which a disc is mounted, a stator having a bearing housing, and a drop-guard mechanism for protecting the rotor from coming out of the stator. On the turntable, a plurality of engaging sections are integrally formed, while on the bearing housing, an engaged section is integrally formed. The engaged section has a plurality of recesses each of which has an opening width wide enough for passing through each of the engaging sections and a plurality of guides for helically guiding the engaging sections into the recesses. A helical engagement of the engaging sections and the engaged section completes the drop-guard mechanism.

Abstract: The disc-driving unit is formed of a rotor having a turntable on which a disc is mounted, a stator having a bearing housing, and a drop-guard mechanism for protecting the rotor from coming out of the stator. On the turntable, a plurality of engaging sections are integrally formed, while on the bearing housing, an engaged section is integrally formed. The engaged section has a plurality of recesses each of which has an opening width wide enough for passing through each of the engaging sections and a plurality of guides for helically guiding the engaging sections into the recesses. A helical engagement of the engaging sections and the engaged section completes the drop-guard mechanism.

Abstract: In a separation preventing mechanism used in a brushless motor, an insertion section is formed into a separation preventing member (5) using resin, which has a form difficult to shape with a metal pressed part, and to which a latching member (4) can be inserted by combining rotation and shaft-direction insertion, making it easy to disassemble it after assembly and size adjustment.

Abstract: A motor which includes a core having two or more coiled teeth; a base to which the core is secured; and a terminal assembly secured to the base. The terminal assembly has lands for attaching coil ends, and is secured to the base by welding. This terminal assembly is configured by assembling at least next three components: an upper terminal holder which is an insulator; a terminal which is a conductor; and a lower terminal holder which is an insulator.

Abstract: A motor which includes a core having two or more coiled teeth; a base to which the core is secured; and a terminal assembly secured to the base. The terminal assembly has lands for attaching coil ends, and is secured to the base by welding. This terminal assembly is configured by assembling at least next three components: an upper terminal holder which is an insulator; a terminal which is a conductor; and a lower terminal holder which is an insulator.