JPS5814354A - Tape guide mechanism - Google Patents

Abstract

PURPOSE:To prevent the running load and the time base variance from being given to a tape to improve the capacity of the recording and reproducing operations, by using one guide post as a fixed post and a rotary post in accordance with the recording and reproducing state. CONSTITUTION:When a pinch roller 17 is set to the recording or constant tape speed, a tape 18 is driven by a supply reel 19 or a take-up reel 20. A turning arm 21 is turned around a fulcrum 22 and is energized counterclockwise by a spring 23 hooked on a shaft 21a of the arm 21 and is turned counterclockwise in the recording or the reproducing having the same speed as recording, when a plunger 24 is turned off, until the arm 21 is brought into contact with a stopper 25, and the arm 21 is brought into contact with a pawl 7 of a guide post 6 to stop the rotation of the post 6. In the reproducing having another tape speed, the plunger 24 is turned on to attract a rod 26 connected to the arm 21, and the arm 21 is separated from the pawl 7 against the spring 23, and the post 6 is freely rotatable.

Description

[Detailed description of the invention] The present invention is based on a tape guide.

Posts that guide the running of a magnetic tape in a magnetic recording/reproducing device can be broadly classified into fixed posts and rotating 4-stroke posts.

Although fixed posts do not cause time axis fluctuations such as jitter and wow to the tape during recording and playback, they greatly increase the tape running load. Same rotation? The strike does not increase the running load, but the
During playback, time axis fluctuations synchronized with the i-rotation frequency of the i-rotation stroke are imparted to the tape.

The present invention uses the same 4-stroke guide as a fixed post during recording or reproduction at the same tape speed as recording, which is extremely sensitive to time axis fluctuations, and is capable of suppressing time axis fluctuations while avoiding an increase in load on the tape such as high-speed playback. The purpose of the present invention is to provide a tape guide mechanism that can be used as a rotary guide mechanism when the rotation is not required.
1) is a cassette case, (2) is a supply t-pu, (3) is a take-up tube s (') (b) is a cassette post, (6
) is one (or multiple) in a position that does not touch the magnetic tape.
It has a claw (7) and rotates around the rotating shaft (8) with a turtle 1 arrow (rotating in the direction of the season). )
is the tape guide, (6) is the exit impedance roller,
0 is the audio oil race head, (2) is the audio head, (to) is the fixed guide 4 stroke, o4 is the capstan, the target is the pinch roller at the recording and same tape speed, and is pressed to the capstan. Driving magnetic tape Han. In FIG. 111, the pinch roller indicated by a two-dot chain line operates at a position other than the above-mentioned speed, and at this time the tape is reel-driven by the supply reel or the take-up reel.

(2) is a rotating arm, and this rotating arm (2) is a fulcrum (
2), and rotate the shaft (21) of the WX rotation arm (2).
When the plunger (2) is off, that is, when recording or playing at the same speed as recording, the plunger (2) rotates counterclockwise until it touches the stopper. Move it so that it comes into contact with the claw (υ) of the guide post (6).

Stop the rotation of the guide post (6). In moderate tape playback other than the above, the plunger (2) is turned on and sucks the rod 4 connected to the rotating arm (2) in the direction of the arrow in Figure 5. ) and move away from the claw (7) of the guide post (-) and pull the guide post (6
) can be rotated freely. @ is a cylinder.

The tape guide am of the present invention can be implemented as described above, and one guide post can be used as a fixed post or as a rotating post depending on the recording/reproducing device.
With one guide post! 11! Therefore, by using the Gaitoist of the present invention in a recording and reproducing device, it is possible to improve the performance of the recording and reproducing device without applying running load or time axis fluctuation to the tape. It gets cloudy.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 111 is a schematic configuration diagram of a recording/reproducing apparatus, and FIG. (・)-Guide bust, (7)--claw, (ll)--rotating shaft, -1 magnetic tape%...-moving arm, (2)-
・Spring, -1 plunger, (2)...stopper,
W-guchi, de agent Yoshihiro Morimoto

Claims (1)

[Claims] A rotatable guide is provided with a claw at a position where it does not come into contact with the magnetic tape and guides the running of the magnetic tape. It consists of a driving means that is turned on and off, and a rotating member that is interlocked with the driving means and is provided so as to be able to come into contact with the pawl of the guide post, and when the driving means is turned on and off,
With OFF, when recording or reproducing at the same tape speed as recording, the rotary member comes into contact with the claw of the guide post to stop the rotation of the guide 4 stroke, and at tape speeds other than the above, the rotary member stops rotating. A tape guide mechanism characterized in that a claw is separated from a guide bust to completely reverse the guide stroke.