JPH0439143B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention involves loading a cassette half into a tape recorder having a rotating cylinder to which a magnetic head is attached, and during recording and playback, the tape is pulled out from the cassette half and transferred to the rotating cylinder. The present invention relates to an improvement in a tape guide device for guiding a pulled-out tape toward a rotating cylinder in a cassette tape recorder for video, digital audio, etc. that performs recording and reproduction by winding, rotating a rotating cylinder, and running the tape.

[Conventional technology]

The conventional cassette tape player of this type was replaced by a third
This is shown in the figure and will be explained below. Reference numeral 1 denotes a rotary cylinder that is rotatable around its axis, and 2 is a fixed cylinder that does not rotate coaxially with the rotary cylinder 1. Both axes are inclined with respect to a support frame 3 (not shown), and the rotary cylinder 1 A magnetic head is attached to the lower end surface, which is the interface with the fixed cylinder 2. Note that 3 is a driving circuit for the rotary cylinder 1.

4 is a post stand, on which a guide roller 5 and a guide post 7 are erected. Further, 8 is a catcher that regulates the stop position of the post stand 4.

The operation is as follows: After loading the cassette half into the player, when a recording or playback command is given,
The post stand 4 moves, and a tape pull-out member such as a guide post 7 erected on the post stand 4 pulls out the tape from the cassette half and winds the tape around the rotating cylinder 1.

At this time, the tape is wound at a certain angle with respect to the center of the rotating cylinder 1, and as the tape runs while the rotating cylinder 1 rotates, an oblique track is formed.

In such a tape player, a guide roller 5 is installed upright on the post stand 4, and at the unloading position where the tape is not pulled out from the cassette, the guide roller 5 is inserted into the back side of the tape inside the cassette. As the post stand 4 moves, the guide roller 5 performs a loading operation in which the tape is pulled out to the side of the rotary cylinder 1.

[Problem that the invention seeks to solve]

As described above, when the post stand 4 is in the loading position, if the tape is suddenly switched from running during playback or recording to a stopped state, the tape may become slack due to the rotational inertia of the tape reel.

This slack causes the tape to move away from the guide roller 5, so the path to the rotating drum via the guide post 7 changes, and the next time you try to play or record, the magnetic head and tape track will be misaligned. There are drawbacks that arise. Furthermore, if the tape is too slack, the tape may fall off from the flange of the guide roller 5.

In particular, digital audio tape recorders have very fast fast forwarding and rewinding speeds.
This tendency was likely to occur when entering the playback state from fast forwarding or rewinding due to inter-track detection, etc.

[Purpose of the invention]

The present invention eliminates the above-mentioned drawbacks of the conventional tape guide device of this type of cassette tape player, and
This prevents the tape from separating from the guide rollers due to tape running inertia, and minimizes locally large slack in the tape. This prevents misalignment between the magnetic head and tape track at startup, and prevents the tape from moving away from the guide flange. The purpose is to prevent the tape from falling off.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention opposes a guide roller provided on a post stand that moves to wrap a tape around a rotating cylinder, and creates a small space between the guide roller and the tape winding surface. The gist is to provide a receiving wall whose surface facing the tape winding surface is formed in an arc shape concentric with the guide roller to prevent the tape from bulging outward away from the guide roller surface.

[Embodiments of the invention]

Next, an example of implementation of the present invention will be described below with reference to the drawings. Note that the same reference numerals as in FIG. 3 indicate the same parts, and the explanation thereof will be omitted.

The present embodiment shown in FIGS. 1 and 2 is different from the conventional example shown in FIG. This is because the receiving wall 6 is erected.

Therefore, in the unloading state where the tape A is drawn into the cassette half, the guide roller 5 is located on the back side of the tape inside the cassette half, and the tape A is moved between the rotating cylinder 1 and the fixed cylinder 2.
The post stand 4 moves to the loading position where the tape A is wound around the tape A so that the guide roller 5 pulls out the tape A.

At this time, since the axes of the rotary cylinder 1 and the fixed cylinder 2 are inclined, the tape A contacts them obliquely, and azimuth recording is performed by the magnetic head.

Then, when switching from playback or recording to stop, the tape A suddenly changes from running to stopped.

Therefore, due to running inertia, tape A
As shown by the imaginary line in the figure, it may separate from the guide roller 5 and stop in an outwardly expanded state.

Then, due to the slack in the tape A, the tape path leading to the rotating cylinder 1 shifts downward, and
The relative position of the track recorded on tape A and the magnetic head in the vertical direction becomes misaligned, making it impossible to perform correct playback.

In other words, when fast forwarding or rewinding is fast, such as with a digital audio or tape recorder, it is even more effective to detect gaps between songs and prevent tape A from slacking due to sudden changes from fast forwarding to playback. It is something that does work.

〔Effect of the invention〕

As described above, the present invention forms a slight gap between the guide roller and the tape winding surface by arranging a receiving wall formed in an arc shape concentric with the guide roller. When the tape moves from running to stopping, there is no local slack in the tape, so there is little change in the tape running path due to slack, and at the beginning of the next playback or recording, there is no change in the tape track due to misalignment between the tape track and the magnetic head. There are fewer recording and reproduction defects, and the rise characteristics are stable.

In particular, when detecting between songs, when moving from fast forwarding or rewinding to playback, even if fast forwarding or rewinding is performed at high speeds such as digital audio or tape recorders, the detection between songs is completed and the Correct playback can be performed from the initial stage of playback.

Furthermore, the danger of the tape riding on or coming off the flange of the guide roller can be prevented, and therefore, even in the event of an abnormality, the tape can be quickly ejected without becoming entangled inside.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a side view of the same. FIG. 3 is a plan view of a conventional example. A... Tape, 1... Rotating cylinder, 2... Fixed cylinder, 4... Post stand, 5... Guide roller, 6... Receiving wall, 7... Guide post.

Claims (1)

[Claims] 1 a rotating cylinder with a magnetic head attached;
a post stand that moves to pull out the tape from the cassette half and wrap it around the rotating cylinder during playback;
A slight gap is formed between the guide roller, which is erected on the post stand and guides the tape, and the guide roller faces the tape winding surface of the guide roller, and the tape winding surface is opposite to the guide roller. 1. A tape guide device for a cassette tape player, comprising a guide roller and a receiving wall formed in a concentric arc shape on opposing surfaces.