Abstract: In the conventionl magnetic recording/regenerating apparatus,loading/unloading of a cartridge has been manually carried out, thus requiring a large force (about 1.5 to 3 kgf) for these operations by a spring force of a leaf spring, and making it difficult to ensure loading of the cartridge in the magnetic recording/regenerating apparatus. In the magnetic recording/regenerating apparatus of the invention, the portion between one end side and the other side of the linking member is rotatably supported on the bottom plate of the enclosure, and the supporting point as a fulcrum, the distance between the fulcrum and an end connecting the second sliding member is made smaller than the distance between the fulcrum and the other end connecting the first sliding member.

Abstract: Disclosed is a magnetic recording-reproducing device in which an engagement portion of a cartridge is locked by a locking portion of a first slide member; therefore as first and second slide members and slide, the cartridge also slides to be loaded and unloaded. The loading and unloading of the cartridge, therefore, can easily be accomplished with extremely little force.

Abstract: The present invention provides a polyacetal resin composition improved, when molded, in environmental stress cracking resistance and in the physical properties of the weld portion. Environmental stress cracking resistance and physical properties of the weld portion before a heat aging resistance test can be improved by adding, to 100 parts by weight of a polyacetal resin, 0.001 to 1.0 part by weight of a difatty acid alkaline earth metal salt produced using two or more kinds of fatty acid and an alkaline earth metal. Also, the physical properties of the weld portion after a heat aging resistance test can be improved by further adding particular fatty acid ester compounds.

Abstract: A magnetic recording/reproducing apparatus including a detecting member which is operated to rotate a drive source disposed in a housing, and a slidable operating member for operating the detecting member. By simply pressing an indicator portion of the operating member with a small force from the front face side of the housing, the cartridge 4 is easily ejected by electrical power as a result of rotation of the drive source. In conventional magnetic recording/reproducing apparatuses, when the cartridge, loaded in the apparatus, is ejected therefrom, the back end of the cartridge must be firmly gripped to pull it out. Therefore, more force is required to pull out the cartridge than is required to insert it, making it very difficult to pull out the cartridge. The magnetic recording/reproducing apparatus of the invention overcomes this problem.

Abstract: A polyacetal resin molded article excellent in thermal aging resistance and surface appearance of molded article in which an amino-substituted triazine compound is dispersed in the form of particles having an average particle size of not more than 1 .mu.m in a polyacetal resin, which molded article is obtained by melt-kneading a polyacetal resin having a formaldehyde content of 1,000 to 3,000 with an amino-substituted triazine compound for a time of 250 seconds or less.

Abstract: At least one aliphatic carboxylic acid metal salt is added to a terminally-stabilized polyacetal resin, said salt having occluded therein at least one metal compound selected from the group consisting of a metal hydroxide and a metal chloride, and optionally having attached to a surface thereof at least one metal compound selected from the group consisting of a metal hydroxide and a metal chloride.