Movable tape guide devices for use in helical-scan video tape recorders
AssigneeHitachi Denshi Kabushiki Kaisha
InventorsNobuyoshi Owada, Tamotsu Tominaga
Life of this patent
Estimating the term…
Abstract
In a helical scan type video tape recorder, a tape guide is moved toward and away from a head drum of the recorder. The tape guide is reciprocated by a slider moved in a groove by a lever loosely connected to the slider. A stop member is provided for preventing the slider from moving beyond a limit, and a detector is provided to detect a position of the slider for controlling the lever. Spring means are connected to the lever for applying a predetermined pressure to the stop member when the slider is stopped by the stop member.
Claims10
A movable tape guide device comprising:
- a deck establishing a reference plane;
- a guide for a tape;
- a slider supporting the tape guide;
- guide means supported by the deck for guiding reciprocating motion of said slider which is straightforward and in parallel with the reference plane;
- drive means for reciprocating said slider;
- stop means for preventing said slider from moving beyond a predetermined limit;
- detecting and controlling means responsive to a position of said slider for controlling said drive means;
- and
- spring means for applying a predetermined force, which is larger than a maximum resultant force in the slider motion direction of the tension forces of the tape acting on the tape guide, to said stop means when said slider is stopped by said stop means.
A guide device for a tape moving along a first path, comprising:
- a deck establishing a reference plane;
- a slider;
- a tape guide mounted on said slider;
- guide means supported by said deck, said guide means being arranged to guide said slider for reciprocating movement parallel to said plane and along a linear second path between an advanced position at which said tape guide is located adjacent to said first path to guide the tape moving therealong, and a retracted position at which said tape guide is remote from said first path;
- stop means for preventing said slider from moving towards said first path beyond said advanced position;
- spring means for biasing said slider into said advanced position;
- drive means operable during one mode to move said slider against the biasing action of said spring means from said advanced position to said retracted position, said drive means being operable in another mode to permit said slider to return to said advanced position under the biasing action of said spring means;
- and
- detecting and controlling means responsive to the position of said slider for controlling said drive means.
Dependencies are inferred from the claim text.