JPS5826355A - Magnetic tape guide device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic tape guide device for magnetic recording and reproducing bags [H].

Some magnetic recording and reproducing apparatuses perform recording and reproducing by winding a magnetic tape around a guide drum having a built-in rotary head by less than 360 degrees. In this type of magnetic recording and reproducing apparatus, as mentioned above, it is necessary to wrap the magnetic tape around the guide drum by a little less than 360 degrees. The drum posts are placed close to each other. When these drum posts are fixed, it is difficult to load the magnetic tape because the spaces between the guide drum and the drum posts and between the drum posts are narrow. Therefore, when manually loading a magnetic tape, the drum post at the magnetic tape entrance is retracted. In addition, when using a leading tape, the joint between the leading tape and the magnetic tape is large compared to the tape thickness, so it is impossible to pass through this joint, and the leading tape is larger than the magnetic tape. Because it is rigid, it is not desirable for its running path to curve sharply. For this reason, the tape loading operation had to be done manually, which was a hindrance to the loading operation.

The present invention has been made based on the above-mentioned problems, and an object of the present invention is to provide an entire magnetic tape guide device that can improve tape loading operations.

In order to achieve the above object, the present invention provides drum posts for guiding the tape at the entrance and exit of the magnetic tape to the guide drum, and retracts the drum posts from these drum posts when loading the tape. This means that a means has been established.

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

FIG. 11 shows the configuration of a magnetic recording/reproducing device including an example of the device of the present invention, and in the figure, 1 is a base. On this base 1 is a cartridge station tension arm 1.
1, 12, an erasing head 13, a leading tape guide member 14, a guide drum 16 having a rotating head 15, an audio head 17, a pinch roller 18, a capstan 19,
A timer roller 20 and a winding reel 21 are arranged.

A cartridge 22 is loaded into the cartridge 2 . Inside this cartridge 22, a magnetic tape 24 is wound around a supply reel 23. A male joint member 25 is provided at the end of the magnetic tape 24. A male joint member 26 of the magnetic tape 24 is attached to one end of the leading tape 26 that leads the magnetic tape 24.
A female joint member 27 is provided which engages with. This female joint member 27 is connected to the cartridge 2.
2 is held on the joint stand 3 before loading. The leading tape 26 has a width larger than the width of the magnetic tape 24, and a tape running path is formed in the middle thereof by guide rollers 4 to 10, a leading guide member 14, a pinch roller 18, a capstan 19, etc. The other end is fixed to the inner reel 21A of the take-up reel 21. Reel 21 is the inner reel 21
Outer reel 2 for winding magnetic tape 24 on the outside of A
It is equipped with 1B. The joint member 27 of the leading tape 26 and the joint member 25 of the magnetic tape 24 described above are joined together in cooperation with the loading operation of the cartridge 22.

Magnetic tape guide means 28 are provided at the inlet and outlet of the tape to the guide drum 16, respectively. This magnetic tape guide means 28 is retracted so as not to become an obstacle when loading the tape, and functions to apply a handle force to the magnetic tape 24 so that the magnetic tape 24 is wrapped around the guide drum 16 by a little less than 360 degrees when the tape loading is completed. fulfill.

The structure of this magnetic tape guide means 28 is shown in FIGS.
This will be explained using figures. In these figures, the same reference numerals as in FIG. 1 indicate the same parts. When the magnetic tape 24 is loaded on the running path, the magnetic tape 24Fi is pressed by the drum guide 29 and wound around the guide drum 16 by a little less than 360 degrees. This drum guide 29 is provided on the movable body 30.

This moving body 30 is slidably supported by a guide member 31,
Can move in a straight line. This movement of the moving body 3° is detected by a detector 32. This detector 32 drives and controls a motor 33. The motor 33 rotates the screw shaft 34. A cylindrical body 35 is engaged with this screw shaft 34 .

This cylindrical body 35 is held by a guide body 36.

The cylindrical body 35 and the movable body 30 are connected by a bottle 36 and a long hole 37. In addition, the cylindrical body 35 and the movable body 30
A spring 38 is disposed between the drum guide 29 and the magnetic tape 24 to apply a predetermined pressing force to the magnetic tape 24.

Next, the operation of an example of the apparatus of the present invention described above will be explained.

As shown in FIG. 1, in a state where the leading tape 26 and the magnetic tape 24 are combined, the winding reel 2
By winding up the leading tape 26 with 1, the magnetic tape 24 in the cartridge 22 can be loaded onto the running path. As a result, when the leading tape 26 is wound onto the reel 21, the motor 33 is driven by this detection signal, and the screw shaft 34 is rotated.

This rotation of the screw shaft 34 causes the cylindrical body 35 to move to the left in the drawings of FIGS. 2 and 3. Along with this movement, the moving body 30 similarly moves to the left via the spring 38. When the moving body 30 reaches a predetermined position, the detector 32 detects this and outputs a stop signal to the motor 33. At this time, the drum guide 29 at the tip of the movable body 30 comes into contact with the magnetic tape 24, and the magnetic tape 24 is wound around the guide drum 16 by a little less than 360 degrees as shown by the two-dot chain line in FIG. This winding is reliably applied by the spring force of the spring 38. This facilitates the loading operation when loading the tape, and allows the magnetic tape 24 to be reliably wound around the guide drum 16 after loading is completed.

As described in detail above, according to the present invention, the tape loading operation can be easily performed and the tape can be wound reliably.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the configuration of a magnetic recording/reproducing device including an example of the device of the present invention, FIG. 2 is a front view showing an example of the device of the present invention, and FIG. 3 is a partial view of the device of the present invention. The bottom view shown in cross section, FIG. 4 is a view taken along the line ■-■ in FIG. 3. 1... Base, 2... Cartridge stage, 15.
... Rotating head, 16... Guide drum, 28... Drum guide guide means. Agent Patent Attorney Toshiyuki Usuda Punishment 1 Figure 6 Figure 2 Fu 3 O? q ”′ Shoulder 4 Figure 3j

Claims (1)

[Scope of Claims] 1. In a magnetic recording/reproducing device in which a magnetic tape is loaded by a leading tape onto a guide drum having a built-in rotary head and its running path, the tape is placed at the entrance and exit of the magnetic tape to the guide drum. What is claimed is: 1. A magnetic tape guide device characterized in that a drum post is provided for guiding the magnetic tape, and a means for retracting the drum post when loading a tape is provided on each of these drum posts. 2. The magnetic tape guide device according to claim 1, wherein the drum post is supported by a guide member so as to be linearly movable. 3. The means for retracting the drum post includes a motor, a screw shaft rotated by the motor, a cylindrical body that engages with the screw shaft and moves linearly, and allows the relative position of the cylindrical body and the drum post. Claim 2, characterized in that the drum post is comprised of a coupling portion that applies a predetermined pressure to the drum post, a spring that applies a predetermined pressure to the drum post, and a detector that detects the position of the drum post and controls the drive of the motor. The magnetic tape guide device described in .