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: A disk apparatus comprises a rotor frame 221 in which disk holding member is placed on a center of an upper surface of the rotor frame 221, a shaft 222 mounted on a center of the rotor frame 221, a bearing metal 231 which holds the shaft 222, a holder 232 which is disposed on an outer periphery of the bearing metal 231 and which holds the bearing metal 231, a stator 240 disposed on an outer periphery of the holder 232, a magnet 224 fixed to the rotor frame 221 at a location opposed to the stator 240, and a thrust cap 233 fixed to a center of a lower portion of the holder 232. An outer periphery of the lower portion of the holder 232 is swaged and fixed to a motor plate 234, and the shaft 222 is disposed between the disk holding member and the thrust cap 233.

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: The invention relates to skin whitening external preparations which contain tocopherol phosphate and/or a salt thereof as an active ingredient capable of prevention and/or removal of skin pigmentation, cosmetics including the skin whitening external preparation and cosmetic cares using the cosmetic. The skin whitening external preparations have excellent skin whitening effects and are readily producible so that they can find wide use for the purpose of skin whitening.

Abstract: In a brushless motor, a projected annular portion is formed in a central portion of a rotor frame and the projected annular portion has a bore that includes a small-bore portion and a large-bore portion. A length L1 of the small-bore portion is in a range of D×0.05≦L1≦D×0.20, where D represents the diameter of the shaft. An axial length L2 of the projected annular portion is arranged to satisfy L2≧L1×2. Thus, the brushless motor realizes a small and thin construction and has a high deflection precision as well as high productivity.

Abstract: The present invention relates to an agent for preventing and treating skin diseases comprising as an active ingredient an ascorbic acid derivative which is a compound represented by the following formula (1) or a salt thereof and which per se exhibits no anti-oxidation activity but is capable of transforming in vivo into a compound having an anti-oxidation activity; wherein R1 represents a group capable of bonding to the carbon at the 2-position of the ascorbic acid skeleton through an ether or ester bond and transformable in vivo into a hydroxyl group, and R2 to R4 may be the same or different and each represents a hydroxyl group or a group derived therefrom.

Abstract: In a brushless motor, a projected annular portion is formed in a central portion of a rotor frame and the projected annular portion has a bore that includes a small-bore portion and a large-bore portion. A length L1 of the small-bore portion is in a range of D×0.05≦L1≦D×0.20, where D represents the diameter of the shaft. An axial length L2 of the projected annular portion is arranged to satisfy L2≧L1×2. Thus, the brushless motor realizes a small and thin construction and has a high deflection precision as well as high productivity.

Abstract: A method for detection of the edge and/or shape of transparent films, wherein the incident rays from a light source enter a polarizer to yield the linearly polarized light for irradiation to a transparent film with a property of rotatory polarization, and the rotatorily polarized light therefrom is transmitted through an analyzer with a polarization axis orthogonal to that of the polarizer, allowing the transmitted light to indicate the edge position and/or shape of the transparent film. An apparatus for detection of the edge and/or shape of transparent films, which is furnished with a polarizer, analyzer and detector to utilize the property of rotatory polarization of a transparent film placed between the polarizer and the analyzer, wherein the polarizer linearly polarizes the incident rays from a light source, emitting the light to be fed to the analyzer, a polarization axis of which is orthogonal to that of the polarizer, and the detector recognizes the output of the analyzer.