JP2893874B2 - Magnetic recording and playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape protection function in a magnetic recording / reproducing apparatus (hereinafter, referred to as VTR), and automatically stops STILL, REC PAUSE, etc. depending on the type of tape. The state continuation time is determined, and after the elapse of the time, the tape tension is released and the tape is released, and after a certain period of time, the cylinder or the drum (hereinafter, cylinder) is stopped. is there.

2. Description of the Related Art In recent years, the popularity of VTRs has increased, and VTRs have been used for all purposes from home use to professional use.

A conventional technique will be described with reference to the drawings. FIG. 2 to FIG.
This shows the state of the VTR mechanism.

Fig. 2 shows the STILL and REC PAUSE state of the VTR, Fig. 3 shows the loosening state with the tape unloaded, and Fig. 4 shows the pinch roller with the tape in contact with the cylinder. It is in a state where the tape tension is released by separating from the stun.

In FIG. 2, 7 is a tape and 8 is its cassette. Reference numeral 9 denotes a pinch roller, which runs and stops the tape 7 between the pinch roller and the capstan 10. 11 is a cylinder.

STIL as shown in Fig. 2 during editing, searching, etc. in the use of VTR
It is often left in the state of L, REC PAUSE.
At this time, conventionally, for example, as shown in FIG. 3, the tape is unloaded after 5 minutes, for example, to protect the tape.

Problems to be Solved by the Invention However, in the above-described tape protection, a tape protection time (for example, VHS, super
VHS, metal tape, etc.) could not be set, and had to be set to the shortest STILL time among the tapes that could be used. Also, if the cylinder is rotated forever in the tape loosening state as shown in Fig. 4, helical scratches will be made on the tape no matter how much the tape tension is released. ).

The present invention solves the above-mentioned problems, and automatically determines the state continuation time such as STILL, REC PAUSE, etc., based on the type of tape, and after the elapse of the time, shifts to a tape loosening state. It is an object of the present invention to provide a VTR having a complete tape protection function of stopping a cylinder after a lapse of a certain time in a loosening state.

Means for Solving the Problems In order to achieve the above object, a VTR of the present invention includes a maximum time determination unit that determines a maximum time during which a pause state is continued according to a type of a tape, and an arbitrary time within this maximum time. An operation unit for setting a pause duration is provided, and a control unit for releasing the tape tension when the set duration elapses.

Function With the above configuration, STILL, REC according to the type of tape
The duration of PAUSE etc. is automatically determined, and after that time, the tape shifts to the tape loosening state.After a certain period of the tape loosening state, the cylinder must be stopped to ensure tape protection. Can be.

Embodiment An embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a block diagram of a VTR of the present invention. In the figure, reference numeral 1 denotes a tape type discriminating switch, which is automatically turned on / off by a claw or unevenness of a cassette. . Reference numeral 2 denotes a maximum time determination unit that determines the maximum time during which a pause state such as STILL is continued according to the type of the tape. Reference numeral 3 denotes an operation unit for setting an arbitrary STILL time or the like. 4 is S
It is a timer for the duration of TILL or the like, and issues a tape loosening command when the time set by the operation unit 3 in the mechanism control unit 5 has elapsed. Numeral 5 receives the command and controls the mechanism. Reference numeral 6 denotes a timer for elapse of the tape loosening time, which issues a cylinder stop command when the tape loosening state elapses for a predetermined time.

FIGS. 1 to 4 show the VTR constructed as described above.
The operation will be described with reference to the drawings.

First, for example, when the switch 1 determines whether the cassette is a VHS or a super VHS, the maximum time determination unit 2
10 minutes for cassette, 5 minutes for Super VHS, maximum STILL
The duration is set automatically.

The VTR user can set the STILL duration only within the maximum STILL duration by the operation unit 3. However, for home use, the maximum value may be automatically set without being set by the operation unit 3.

Next, while the VTR is in use, when STILL or the like elapses, the timer 4 sends a loosening command to the mechanism control unit 5 from the timer 4, and the mechanism control unit 5 sends the loosening command to the VTR.
Is shifted from the state of FIG. 2 to the state of FIG. 3 or FIG. 3 or 4 can be set by the user.

In the state shown in FIG. 4, if the cylinder is rotating, a timer 6 sends a cylinder stop command to the mechanism control unit 5 after a certain period of time, and the cylinder is stopped by the mechanism control unit 5.

As described above, according to the present embodiment, an appropriate state duration such as STILL is automatically determined based on the type of tape,
After the elapse of that time, the tape tension is released, and the tape loosening state is reached.
Complete tape protection can be provided.

Advantageous Effects of the Invention As is apparent from the above description, according to the present invention, the maximum duration of STILL or the like is automatically determined based on the type of tape, and after that time, the tape enters a tape loosening state, and an important tape is Will not hurt.

[Brief description of the drawings]

FIG. 1 is a block diagram of a VTR according to an embodiment of the present invention, and FIGS. 2 to 4 are plan views showing respective states of a mechanism of the VTR. 1 ... Tape type discriminating switch, 2 ... Maximum time judging unit, 3 ... Operation unit, 4 ... Timer 1, 5 ... Mechanism control unit, 6 ... Timer 2, 7 ... Tape, 8 ... Cassette, 9 ... Pinch roller, 10 ... Capstan, 11 ...
…cylinder.

Claims (1)

(57) [Claims] A maximum time determination unit for determining a maximum time for which a pause state is continued according to a type of a tape, an operation unit for setting an arbitrary pause duration within the maximum time, A magnetic recording / reproducing apparatus comprising: a controller for releasing the tape tension while the tape is in contact with the cylinder when the set duration has elapsed.