JPS62134849A - Run height control mechanism for magnetic tape - Google Patents

Abstract

PURPOSE:To control the run height of a magnetic tape even during a reverse run by pressing a guide member against the roller of a tape cassette on the take-up reel side, when a pinch roller is pressed against a capstan. CONSTITUTION:The guide member 22 is provided on a pinch roller arm 19 between a pinch roller 13 and a roller 23 and this guide member 22 is abutted on the roller 3 to control the up-down movement of the magnetic tape 4. The guide member 22 is caulked in a plate 29, which is fitted to a pinch roller arm 19 with a pin 30 along with a spring body 31. At this time, the plate 29 is rotatable as shown by arrows 32 and 33, but energized by the spring 31 as shown by the arrow 32 all the time; while the pinch roller arm 19 rotates as shown by the arrow 32 to press the pinch roller 13 against the capstan 14, the guide member 22 abuts on the roller 23 to prevent the guide member 22 by the spring 31 from separating from the roller 23.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a magnetic tape running height regulating mechanism during magnetic tape running in a magnetic recording/reproducing device, and is particularly suitable for regulating the magnetic tape running height during reverse running. This invention relates to a magnetic tape running height regulating mechanism.

[Background of the invention J1] In the conventional magnetic recording 111 generation device, [;
As described in Publication No. 9-8236, the running height of the magnetic tape is regulated by the horns of the guide member installed on the chassis. It wasn't.

[Object 1 of the invention] Object 1 of the present invention is a magnetic IC tape running system having a function of eliminating the disadvantages described in +'+ii and maintaining a stable magnetic tape running height even when running in reverse. The objective is to provide a regulatory mechanism. .

[Summary of the invention]

1-1 of the magnetic tape during reverse running: The main cause of the tape force is the step winding of the magnetic tape in the take-up reel hub of the tape force set 1~, and the roller on the take-up reel hub side to the tape force set 1. 31 to fall? The guide oil phase is brought into direct contact with the roller in order to obtain a stable running height of the magnetic tape.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

Figure 2 shows the tape force set 1 to 1 in a conventional magnetic recording/reproducing device.
is attached and the magnetic tape is running. During normal playback, the installed tape strength is 1 to 1.
The magnetic tape 4 pulled out by the loading post 2.3 is transferred to the guide boss 1 5 and then to the tension post 1-6.
．． Guide boss 1-7. Full width erase head8. The pinch roller 13 is wound around the cylinder 10 at a predetermined angle while being attached to the impedance roller 9, and is attached to the bosses 1 to 12 of the audio/CTL head 11° and is pivotally supported by the pinch roller arm 19. capstan] 4, and then attached to rollers 20 of tape force sets 1 to I,
Tape force set 1 rotated clockwise by take-up reel 16 rotationally driven by idler arm 15
-1 winding reel hub (not shown). In addition, in reverse regeneration, the idler arm 1-5 rotates in the direction of arrow 17 from the above-mentioned state, rotates the feed-out rule 18 in a counterclockwise direction 81, and the capstan 14 begins to reverse. , the magnetic tape 4 is configured to run in the opposite direction to the running direction during normal reproduction.

Next, the present invention will be explained in detail using FIGS. 1 and 3. FIG. 1 is a simplified view of the vicinity of the capstan 14 in FIG. 2, viewed from the direction of arrow 21. 1);1
As mentioned above, magnetic tape 4 is connected to audio/CTL 11
At this time, there is no sound.
/ CTL head F1]
L belly button F 2! "i" reads the CTL signal 26 recorded on the 1st edge of the magnetic tape 45. Conventionally, in magnetic recording and reproducing devices, the above-mentioned cTr and head 25 The read CTL signal 26 controls the rotational speed of the cylinder O (Fig. 2) and the capstan 14. Therefore, the cTL head 25 cannot accurately read the CTl signal 26. In the case, 1. Physically, the magnetic tape 4 is driven -1 in the direction of the arrow 27, c'r r, and the signal 26 is sent to the CTL.
3. If you get a tatoo from a person, 3.

If this occurs, the normal rotation of the cylinder 10 (Fig. 2) and capstan 14 will be hindered, so a guide post 12 is provided between the audio/CTL head 11 and the capstan 14 to prevent the magnetic tape 4 from running. We are trying to regulate the height. However, due to various conditions, the magnetic tape 4 may be reversely wound within the take-up reel hub 24, when the bottom ends are not aligned and the magnetic tape is wound in stages, or when the roller 23 is tilted.
When the Tj raw is performed, the guide post 12 cannot fully restrict the downward movement of the magnetic tape 4, and the CT from the CTL head 25 is
The LTl signal 26 may be lost. For this purpose, a new guide member 22 is newly provided between the pinch roller 13 and the roller 23 and between the pinch roller arm 19'', and the guide member 22 is brought into contact with the roller 23 so that the magnetic tape 4 can be
1- The drive was regulated. Next, the detailed mechanism will be explained with reference to FIG. FIG. 3 is a view of FIG. 1 viewed from the direction of arrow 28. The guide member 22 is a plate 29
The plate 29, together with the spring body 31, is attached to the pinch roller 19 by means of a pin 3o. At this time, play 1-29 is arrow 32.
Although it is possible to rotate in 33 directions, it is constantly biased in the direction of arrow 32 by the spring body 31.

In actual operation, the pinch roller arm 19 rotates in the direction of the arrow 32, and the pinch roller 13 moves toward the capstan 1.
4, the guide member 22 comes into contact with the roller 23, and the guide member 22 is pressed against the roller 23 by the spring body 31.
I try not to leave.

According to the present invention, it is possible to regulate the vertical movement of the magnetic tape during reverse playback, which could not be controlled only by the conventional guide bosses 1 to 1. ] is also effective.

〔Effect of the invention〕

According to the present invention, since the running height of the magnetic tape can be completely regulated even during reverse running, there is an effect of reducing defects.

[Brief explanation of drawings]

1 is a parent view of the vicinity of the magnetic tape running height regulating mechanism according to an embodiment of the present invention, viewed from the direction of arrow 21 in FIG. 2; FIG. 2 is a plan view of a conventional magnetic recording/reproducing apparatus; The figure is a parent view taken from the direction of arrow 28 in FIG. 4...Magnetic tape, 11...Audio/CTL head. 12... Guide post, 13... Pinch roller, 1
4...Capstan, 19...Pinch roller arm. 22...Guide member, 23...Roller, 24...
Take-up reel hub, 29... plate, 30...
pin. 931...Spiritual body.

Claims (1)

[Claims] 1. In a magnetic recording and reproducing device, a magnetic tape driving force generator consisting of a pinch roller and a pinch roller arm that pivotally supports the pinch roller is provided with a guide member and a spring body, and the guide member is driven by the spring body. A running height of a magnetic tape characterized by a mechanism in which the guide member is pressed against the roller on the take-up reel side of the tape cassette when the pinch roller is pressed against the capstan by biasing in one direction. Regulatory mechanism.