JPH0521345U - Fast forward / rewind device - Google Patents

Abstract

(57) [Summary] [Purpose] Even when the winding speed during the fast-forwarding or rewinding operation of the magnetic tape in the half-loading state is not the predetermined winding speed, it is always high speed and surely the end. The magnetic tape can be wound up to. A rotation detector 14 for detecting a winding speed during fast-forwarding or rewinding of the magnetic tape 2 in a half-loading state, and a controller 15 for controlling switching between a half-loading state and an unloading state. It will be.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fast-forward / rewind device for fast-forwarding or rewinding a magnetic tape in a half-loading state in a magnetic recording / reproducing device or the like.

[0002]

[Prior Art]

 As shown in FIG. 3, the conventional fast-forward / rewind device of this type has an audio control head 1 for recording / reproducing an audio signal and a control signal on a magnetic recording / reproducing device, and a magnetic tape 2 for the audio control head 1 described above. A fixed guide 3 that guides the vehicle to travel in an appropriate contact state, a half loading post 4 that forms a half loading state, a drum device 5, and a spring 6 that is added to the reel stand 7 to stabilize the tape running. A back tension brake 8 for adjusting the back tension of the magnetic tape 2 by increasing and decreasing the frictional force is provided, and a cassette 9 is provided with guides 10 to 13 in the cassette for guiding the running of the magnetic tape 2 at the entrance and exit of the cassette 9. Be prepared.

The fast-forwarding / rewinding device configured as described above uses the audio control head 1 to send the control signal recorded in the control track at the lower end of the magnetic tape 2 during the fast-forwarding or rewinding operation of the magnetic tape 2. In order to easily display the tape counter and display the beginning of the tape, the magnetic tape 2 is pulled out from the cassette 9 by moving the half loading post 4 to the position 4a (the position of the half loading post 4 in FIG. 3). Fast-forwarding or rewinding the magnetic tape 2 in a state where the tape running position in the half loading state is formed and the magnetic tape 2 is guided by the fixed guide 3 of the magnetic recording / reproducing apparatus and the guides 10 to 13 in the cassette 9. Is to do.

In FIG. 3, the arrow direction of the magnetic tape 2 indicates the traveling direction of the magnetic tape 2 in the rewinding operation.

[0005]

[Problems to be solved by the device]

 However, in the conventional fast-forwarding / rewinding device described above, the magnetic tape is wound around the audio control head, the fixed guide, and the half-loading post during the fast-forwarding or rewinding operation in the harvesting state, so that the tape feed load is applied. Is large, and the tape running load is increased due to changes in the braking force of the back tension brake over time, etc., and the prescribed winding speed cannot be maintained. There is a problem that the magnetic tape cannot be taken up, and when stopped, the magnetic tape cannot be taken up to the end.

[0006]

[Means for Solving the Problems]

 A fast-forwarding / rewinding device according to the present invention includes a rotation detector for detecting a winding speed during a fast-forwarding or rewinding operation of a magnetic tape in a half loading state, and a predetermined winding speed is detected by the rotation detector. The control unit controls the switching between the half-loading state in the case of being loaded and the unloading state in the case of detecting a situation at a predetermined winding speed.

[0007]

[Action]

 In the fast-forwarding / rewinding device according to the present invention, during the fast-forwarding or rewinding operation of the magnetic tape in the half-loading state, if the rotation detecting unit detects a situation where the winding speed is not the predetermined value, the control unit The magnetic tape is fast-forwarded or rewound in the unloading state by controlling the switching from the half-loading state to the unloading state.

[0008]

【Example】

 An embodiment of the fast forward / rewind device of the present invention will be described below with reference to FIGS. The same reference numerals are used for the same parts as in the conventional example.

The fast-forwarding / rewinding device of the present invention comprises an audio control head 1 for recording / reproducing an audio signal and a control signal on / from a magnetic recording / reproducing device, and a magnetic tape 2 in an appropriate contact state with the audio control head 1. A fixed guide 3 designed to run, a half loading post 4 forming a half loading state, a drum device 5, and a friction force applied to a reel stand 7 by a spring 6 for stabilizing tape running. A back tension brake 8 that adjusts the back tension of the magnetic tape 2 by increasing or decreasing it, a rotation detector 14 that detects the winding speed by the rotation of the reel base 7, and a predetermined winding speed by the rotation detector 14. Is detected, the half-loading condition and the situation where the winding speed is not the prescribed value, for example, The cassette includes a control unit 15 that controls switching to an unloading state when a situation in which the winding speed is reduced or stopped is detected, and a drive unit 16 that shifts from the half loading state to the unloading state. 9 is provided with in-cassette guides 10 to 13 for guiding the running of the magnetic tape 2 at the entrance and exit of the cassette 9.

In the fast-forwarding / rewinding device configured as described above, normally, during the fast-forwarding or rewinding operation of the magnetic tape 2, the control signal recorded in the control track at the lower end of the magnetic tape 2 is controlled by the audio control head. In order to easily display the tape counter and display the cue, the half loading post 4 is moved to the position 4a so that the magnetic tape 2 is pulled out from the cassette 9 to form a tape running position in the harflowing state. The magnetic tape 2 is fast-forwarded or rewound in a state where the magnetic tape 2 is guided by the fixed guide 3 of the magnetic recording / reproducing apparatus and the in-cassette guides 10 to 13 of the cassette 9. During fast-forwarding or rewinding operation of the magnetic tape 2 in the loading state When the rotation detection unit 14 detects a situation where the winding speed is not a predetermined winding speed due to an increase in the tape running load, for example, a situation where the winding speed is reduced or stopped, the control unit 15 changes from the half loading state to the unloading state. The drive unit 16 performs an unloading operation to return the half loading post 4 to the position 4b, and fast-forwards or rewinds the magnetic tape 2 in the unloading state.

In FIG. 2, the arrow direction of the magnetic tape 2 indicates the traveling direction of the magnetic tape 2 in the rewinding operation.

[0012]

[Effect of the device]

 Since the fast-forwarding / rewinding device of the present invention is configured as described above, during the fast-forwarding or rewinding operation of the magnetic tape in the half-loading state, the rotation detector detects a situation where the winding speed is not the predetermined winding speed. Then, the control unit controls to switch from the half-loading state to the unloading state, and the magnetic tape is fast-forwarded or rewound in the unloading state. It is possible to wind.

[Brief description of drawings]

FIG. 1 is a block diagram of essential parts showing an embodiment of a fast-forwarding / rewinding device of the present invention.

FIG. 2 is a plan view of the essential parts showing an embodiment of the fast-forwarding / rewinding device of the present invention.

FIG. 3 is an explanatory plan view of relevant parts of an example of a conventional fast-forward / rewind device.

[Explanation of symbols]

 2 magnetic tape 14 rotation detector 15 controller

Claims (1)

[Scope of utility model registration request] 1. A magnetic recording / reproducing device for fast-forwarding or rewinding a magnetic tape in a half-loading state.
In a rewinding device, a rotation detection unit that detects a winding speed during fast-forwarding or rewinding operation of the magnetic tape in a half loading state, and half loading when a predetermined winding speed is detected by the rotation detection unit A fast-forwarding / rewinding device comprising a state and a control unit for controlling switching of the unloading state when a situation where the winding speed is not a predetermined speed is detected.