# US 5,710,679 A · Magnetic recording and reproducing apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,710,679 A - Document ID: US5710679A - Status: Granted - Kind: A - Application number: 08/430,130 - Filed: 1995-04-25 - Granted: 1998-01-20 - Earliest claimed: 1990-06-13 - Assignees: Canon Kabushiki Kaisha - Inventors: Hidetoshi Matsuoka; Junji Kobayashi; Osamu Nagatsuka; Akira Tomitaka; Osamu Morita - Web page: https://patentgrep.com/patent/US5710679A ## CPC - G11B 15/6656: {using two-sided extraction, i.e. "M-type"} - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) ## Abstract In a magnetic recording and reproducing apparatus for recording and reproducing information by pulling out a tape from a cassette by revolving a pair of tape pull-out members in opposite directions with a tape loading mechanism and by wrapping the tape around a rotary drum, a tape pull-out aiding member is arranged in combination with one of the tape pull-out members; and a differential mechanism is arranged between the tape pull-out aiding member and the tape pull-out member to cause the two members to revolve at different angles of revolution in such a way as to give a desired angle of inclination of the tape relative to the rotary drum. The differential mechanism is formed jointly by a slide member which is slidable in the direction of revolution, the tape pull-out aiding member being disposed at the slide member, and a positioning member which is arranged to lock the tape pull-out aiding member by restricting its movement in such a way as to cause two members to revolve at the different angles of revolution. ## Claims ### Claim 1 A recording and/or reproducing apparatus for recording and/or reproducing information by pulling out a tape from a cassette by moving a pair of tape pull-out members in opposite directions with a loading mechanism and by wrapping the tape around a rotary drum, comprising: a) a tape pull-out aiding member for pulling out said tape in combination with one of said tape pull-out members; and b) differential means arranged between said one of said tape pull-out members and said tape pull-out aiding member to cause said one of said pull-out members and said tape pull-out aiding member to revolve at different angles of revolution, and said differential means including a slide member along said rotary drum, and said tape pull-out aiding member being swingably carried by a fore-end of a slide arm which is carried to be movable in a longitudinal direction of the slide arm and which is swingably carried by said slide member, and every portion of said differential means moving with said one of said tape pull-out members and said tape pull-out aiding member along said rotary drum. ### Claim 2 (depends on 1) An apparatus according to claim 1, wherein said tape pull-out aiding member which is carried by said slide arm is engageable with a stopper and unswingable in a first position in which a distance between a fulcrum of said arm and that of said slide arm is at a maximum value thereof and disengageable from said stopper and swingable in a second position in which the distance between the fulcrum of said arm and that of said slide arm is at a minimum value thereof. ### Claim 3 (depends on 1) An apparatus according to claim 1, wherein said arm and said slide arm are arranged to be urged by a torsion spring in the direction of revolution of said slide member and also in the direction of moving said slide arm during a process of wrapping the tape around the rotary drum, and to be urged by said torsion spring only in the direction of moving said slide arm by almost completely nullifying an urging force of said torsion spring in the direction of revolution of said slide member when the process of wrapping the tape around the rotary drum has ended. ### Claim 4 A recording and/or reproducing apparatus arranged to load and unload a tape on/or from a head drum by driving a plurality of tape guide members respectively through a plurality of rotatably provided loading rings which are driven by gears, comprising: a protruding part arranged to be stationary all the time on a first loading ring on one side thereof which is opposed to a second loading ring, said protruding part regulating a gap between said first and second loading rings so that said gap is not smaller than a predetermined distance to permit said first and second loading rings to be driven, said protruding part having a portion inclined in the direction of rotation of said loading ring. ### Claim 5 (depends on 4) An apparatus according to claim 4, wherein said protruding part is disposed in a boundary area between a gear part and a non-gear part of said first loading ring. ### Claim 6 A tape loading mechanism for a recording and/or reproducing apparatus arranged to wrap a tape around a head carrying drum by rotating two ring members to which guide posts for guiding the tape are connected, comprising: a drum base secured to a chassis of said magnetic recording and/or reproducing apparatus and arranged to support said drum, said drum base forming parts of a plurality of guide portions for guiding the guide posts, and said two ring members being rotatably mounted on said drum base; and a gear train mounted on said drum base for transmitting a rotational force between said two ring members, wherein said gear train is arranged to be able to revolve in two directions along peripheries of said two ring members and to be urged by an elastic member in one of said two directions. ### Claim 7 (depends on 6) A mechanism according to claim 6, wherein said two ring members are in mutually parallel and confronting disposition, said two ring members having holes formed therein in parts confronting each other at a predetermined phase of rotation, and fixing members for securing said drum to said drum base are arranged to be attached or removed through said holes. ### Claim 8 (depends on 6) A mechanism according to claim 6, wherein said two ring members are in mutually parallel and confronting disposition, and one of said two ring members is provided with a cutout part for escaping a specific gear included in said gear train in mounting said gear train, said cutout part being formed at a predetermined part in a periphery of said one of said ring members. ### Claim 9 (depends on 6) A tape loading mechanism according to claim 6, wherein said parts of the plurality of guide portions include guide portions for guiding said guide posts when tape loading has been completed. ### Claim 10 A recording and/or reproducing apparatus comprising: a) a rotary drum arranged to have a tape wrapped around said rotary drum over a predetermined angular range, said rotary drum having heads mounted thereon; b) a plurality of tape pull-out members for wrapping the tape around said rotary drum; c) a plurality of rotatably provided driving members arranged to drive said tape pull-out members and superposed on each other in layers; and d) a spacer interposed between said driving members to permit said driving members to be driven, said spacer arranged to be stationary all the time on a surface of one of said driving members and said spacer having a portion inclining in the direction of rotation of said one driving member. ### Claim 11 (depends on 10) An apparatus according to claim 10, wherein said spacer includes a cut-and-raised piece formed on the sum face of one of said driving members. ### Claim 12 (depends on 10) An apparatus according to claim 10, wherein said spacer includes a protruding part provided on the surface of one of said driving members. ### Claim 13 (depends on 10) An apparatus according to claim 10, wherein said driving members include a pair of loading rings.