JPS6356854A - Rotary head type recording or reproducing device - Google Patents

Abstract

PURPOSE:To use a cassette in which a tape is taken up to its end immediately by taking up the prescribed quantity of the tape onto other reel of a couple of reels when tape end is detected in loading the cassette to the titled device. CONSTITUTION:In loading a cassette 1, a system controller 17 detects whether or not its tape comes to its end by the output of a photodetector 9a, a stopper driving circuit 15 parts a stopper 7 from a winding reel base at the time of detecting tape end and a reel driving circuit 14 drives a reel 2 for a prescribed period. After the tape is taken up a supply reel 2 by a quantity sufficient to the tape loading, the tape loading is started. Thus, even when a cassette in any state is loaded, the tape loading is started immediately to obtain the tape usable state.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotating head type recording or reproducing device, particularly a tape-shaped recording medium stored in a cassette and stretched between a pair of reels, which is equipped with a rotating head. The present invention relates to a device that is wound around a cylinder member and records or reproduces signals on the medium using the head.

[Conventional technology]

An example of the above-mentioned device is the well-known video tape recorder (
Hereinafter, there is a VTR (hereinafter referred to as a VTR), and this VTR will be explained below as an example.

FIG. 4 is a diagram showing the configuration of a general VTR.

In the figure, 101 is a cassette, 102 is a supply reel, 103 is a take-up reel, and 104 is a magnetic tape.
04 is both reels 1o2°10 in the cassette 101
It is wrapped in 3. Magnetic tape 1 in cassette 101
04 is stored, the tape 104 is stretched between the guide bins 100a and 100b in the cassette 101 so as to be exposed to the opening 101a of the cassette.

The stretched magnetic tape 1o4 (indicated by dotted lines in FIG. 4) is moved between guide posts 106°107, 1.
08. At step 109, the tape 104 is pulled out from the opening 101a and wound around the cylinder 105 having a rotary head on its circumferential surface, thereby making it possible to record and reproduce information on the tape 104. At this time, the tape path at the completion of so-called tape loading is performed by the above-mentioned moving guide posts 106, 107, 1.
08, 109 as well as fixed guide posts 112, 113, ], 14 fixed in advance to the main body of the apparatus.

1) 5 is a loading ring, which is rotatably held along a guide member (not shown), and movable guide posts 106, 107.
108 have been planted.

Further, in the figure, 111 is a capstan for conveying the tape 104 along the tape path, and 110 is a pinch roller that is pressed against the capstan 111. The pinch roller 110, together with the moving guide post +-109,
It is assumed that it is planted on a rotatable lever 116,
The lever 116 is moved from the inside of the opening 10]-i, l to the illustrated position by a mechanism not illustrated.

By the way, as mentioned above, when loading a tape in a VTR and when unloading a tape, it is desirable to prohibit rotation of one reel (for example, the take-up reel). This is due to the prohibition of tape movement due to repeated loading and unloading of the tape.

[Problem that the invention seeks to solve]

However, if a cassette with the tape completely wound on the take-up reel side is loaded into such a VTR and the take-up reel is prohibited from rotating even when attempting to load the tape, it is difficult to remove the tape from inside the cassette. I can't pull it out and can't load the tape.

Therefore, if the end of the tape is detected during tape fast forwarding in a VTR that runs the tape without tape loading, it is possible to rewind the tape to all the supply reels necessary for tape loading. Conceivable.

However, even in this case, it is not possible to deal with cases where the cassette is once removed from the VTR and used on another VTR, or where the user winds up the reel by hand. In a VTR operated under such conditions, the above-mentioned cassette could not be used.

In view of the above-mentioned problems, the present invention provides a device that prohibits the rotation of one reel during tape loading, in which a cassette in which a tape-shaped recording medium is wound to the end on one reel can also be used. The purpose is to

[Means for solving problems]

For this purpose, according to the present invention, a tape-shaped recording medium stored in a cassette and stretched between a pair of reels is wound around a cylinder member provided with a rotating head, and the In an apparatus for recording or reproducing signals with a head, there is provided a tape loading means for winding the tape-shaped recording medium around the cylinder member, and a rotation of one of the pair of reels during operation of the tape loading means. and means for inhibiting winding of the tape-shaped recording medium by a predetermined amount onto the other side of the pair of reels when the end of the tape-shaped recording medium is detected when the cassette is installed in the apparatus. And so.

[Effect]

By configuring as described above, even if the tape-shaped recording medium in the cassette is wound up to the end on one of the reels, it is possible to shift to a state in which tape loading is possible immediately after mounting the cassette.

〔Example〕

A VTR as an embodiment of the present invention will be described below.

Fig. 1 is a diagram showing the main part configuration of a VTR as an embodiment of the present invention, Fig. 2 is a flowchart for explaining the operation of the VTR shown in Fig. 1, and Fig. 3 is a flowchart of Fig. 2. FIG. 3 is a diagram schematically showing the illustrated operation.

In Figure 1, 1 is a tape cassette, 2 is a supply reel,
3 is a take-up reel, 4 is a magnetic tape, 6a, 6b.

6c is 106. in FIG. 4, respectively. 108. 109 is an idle post that moves in the same manner as 109; 7 is a stopper that prevents rotation of the take-up reel 3 by coming into pressure contact with a nut provided on a take-up reel stand (not shown); 8 is a cylinder member provided with a rotating head; 9a , 9b are a light receiving element and a light emitting element for detecting the end of the tape. The end of the tape is detected by detecting a transparent leader tape section provided at the end of the magnetic tape 4 using the light receiving element 9a and the light emitting element 9b.

Also, 10 is a capstan, 11 is a pinch roller, 12 is a cassette attachment detector, 13 is a moving guide post) 6a,
6b is a loading ring drive circuit that drives an erected loading ring (not shown); 14 is a reel drive circuit; 15 is a stopper drive circuit that controls the compression of the stopper 7 to the shoe of the take-up reel stand; 16 is a camp stand; 1
17 is a system controller.

The operation of the system controller 17 in FIG. 1 regarding cassette mounting will be described below with reference to FIGS. 2 and 3.

Furthermore, when the cassette 1 is installed in the VTR main body, the cassette installation detector 12 detects this and sends a detection signal to the system controller 17. In response to this, the system controller 17 sets the flag (FL) to 0, and then detects whether or not it is the end of the tape based on the output of the light receiving element 9a. (This state is shown in FIG. 3(a)) Separated from the stand, the reel 2 is driven for a predetermined period by the reel drive circuit 14 (this state is shown in FIG. 3(b)). This driving period is sufficient for tape loading.
Needless to say, the period is set to a period necessary for winding the tape onto the supply reel 2. After this, start tape loading.

On the other hand, if the end of the tape is not detected, the flag is set to 1.
and starts loading immediately.

This tape loading is carried out by prohibiting rotation of the take-up wheel 3 by the stopper 7 and by driving the aforementioned loading ring by the loading ring drive circuit 13. A state in which this tape loading is completed is shown in FIG. 3(c).

After tape loading is completed, if the flag is 1, the device is in a standby state for the next operation. On the other hand, if the flag is O, the capstan drive circuit 16
0 to transport the tape at low speed in the direction shown in FIG. 3(d). At this time, of course, the take-up reel 3 is also driven by the reel drive circuit 14. Then, when the end of the tape is detected again, the tape conveyance is stopped and the apparatus waits for the next operation.

This tape transport prevents the end of the tape from being detected when tape loading is completed even though the cassette 1 has been wound up to the end of the tape and loaded into the device. This is particularly effective for VTRs equipped with a mechanism for rewinding the tape to the supply reel 2 at high speed when the tape is detected to be wound up.

According to the above-mentioned VTR, no matter what state a cassette is loaded in, it is possible to immediately load the tape and make the tape usable.

In addition, in the VTR of the above embodiment, the rotation of the take-up reel is prohibited during tape loading, but the rotation of the supply reel is also prohibited, and when the end of the tape is detected when the cassette is loaded, the tape is wound. A similar effect can be obtained by using a configuration in which the material is fed to the reel side.

〔Effect of the invention〕

As explained above, according to the present invention, even in a device that prohibits rotation of one reel during tape loading, a cassette in which a tape-shaped recording medium is wound to the end on one reel can be used immediately. It became possible to do this.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the main part configuration of a VTR as an embodiment of the present invention, Fig. 2 is a flowchart for explaining the operation of the VTR shown in Fig. 1, and Fig. 3 is a flowchart of Fig. 2. FIG. 4 is a diagram schematically showing the operation shown, and FIG. 4 is a diagram showing the configuration of a general VTR. In the diagram, l...cassette, 2... supply reel, 3
...Take-up reel, 4.Magnetic tape, 6.
...Moving guide post, 7...Stopper, 8...
Cylinder member, 9a, 9b... Tape end detection element, 10... Capstan, 12... Cassette attachment detector,
13... Loading ring drive circuit, 14... Reel drive circuit, 15... Stopper drive circuit, 16
...Casbutane drive circuit, 17...System controller.

Claims (1)

[Claims] A device in which a tape-shaped recording medium stored in a cassette and stretched between a pair of reels is wound around a cylinder member having a rotating head, and a signal is recorded on or reproduced from the medium by the head. , comprising: a tape loading means for winding the tape-shaped recording medium around the cylinder member; and means for prohibiting rotation of one of the pair of reels during operation of the tape loading means; 1. A rotary head type recording or reproducing apparatus, characterized in that when the tape-shaped recording medium is mounted on the tape-shaped recording medium, when the end of the tape-shaped recording medium is detected, the tape-shaped recording medium is wound up by a predetermined amount onto the other side of the pair of reels.