JPH11219554A - Magnetic recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the scraching of a tape and also to lower the cost of a device by eliminating the lower flange of a guide roller and unitizing a guide for regulating the position of the width direction at the time of drawing out a tape to a tape guiding body. SOLUTION: The flange 10b provided in a tape guiding body 10 by holding a roller 24 with a washer 29 achieves a function equivalent to a lower flange. The relation of respective diameters ϕC, ϕA, ϕB of the flange 10b, an upper flange 23 and roller 24 is constituted so as to satisfy ϕC>=ϕA>ϕB or ϕA>=ϕC>ϕB. As a result, the flange 10b regulates the position of the width direction of a tape until the tape is drawn out from a cassette to be wound around a cylinder and prevents damage of scraches or the like from being imparted on the tape without applying a restricting force to the tape during the tape is running. Thus, even when a guide roller which does not have the lower flange is used in this device, the constant running of the tape is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus such as a VTR and a DAT for recording / reproducing by pulling out a magnetic tape (hereinafter referred to as "tape") in a cassette and winding it around a rotary cylinder having a magnetic head. And the configuration of the tape guide.

[0002]

2. Description of the Related Art A conventional example will be described below with reference to FIGS.

FIG. 2 is a plan view of a tape running system when a cassette of a mechanism is mounted.

FIG. 3 is a schematic diagram of a tape running system.

In FIG. 2, 1 is a tape, 2 is a cassette, 3 is a supply side reel, 5 is a tension pin, 4 and 6 are entry side tape guides, 7 is an erasing head, 8 is an entry side guide roller, and 10 is a tape. The guide L is provided with an entrance guide roller 8 and an entrance inclined guide 9. Reference numeral 11 denotes a cylinder on which a magnetic head is mounted; 22, a lead provided on the cylinder 11;
2. The delivery guide roller 13 is mounted. Reference numeral 15 denotes an audio head, 16 denotes an output tape guide, 17 denotes a capstan, 18 denotes a pinch roller, 19 denotes a tape pull-out guide, 20 denotes a take-up reel, and 21 denotes a main board.

The operation of the above configuration will be briefly described.

Although not shown when the cassette 2 is mounted, the operation of the mechanism is switched and the tape guides L10 and R14 are driven by the power from a loading motor which is a drive source of the operation element, so that the tape is driven. Is drawn out and wound around each tape guide or the like and a cylinder to form a traveling path.

Next, the running path of the tape will be described with reference to FIG.

The cylinder 11 rotates in the direction of arrow C, and the head mounted on the cylinder 11 scans the tape 1 obliquely, so that the tape 1 is vertically moved by the scraping force of the cylinder 11 (direction of arrow D). I have received F0. On the other hand, the guide rollers 8, 13 on the entrance side and the exit side of the cylinder 11
Of the tape 1 from the upper flange 23 (FIG. 4),
By adding F2, the lower end of the tape 1 becomes the cylinder 1
The traveling height is regulated so as to contact the one lead 22.
Therefore, the tape 1 does not move up and down in the width direction and
Drive stably along. Also, the entry side tape guide 6,
In the lower flange of the exit tape guide 16, the reaction forces F3, F with respect to the regulating forces F1, F2 applied by the entrance flange of the entrance guide roller 8 and the upper flange of the exit guide roller 13, respectively.
4 have been added to tape 1.

The structure of the tape guide will be described with reference to FIG.

The tape guides L10 and R14, the entrance guide roller 8, and the exit guide roller 13 have the same structure, and the description will be made on the entrance side.

A thread portion 10a is formed in the tape guide body L10, an entry-side inclined guide 9 is planted, and a piece 27 is press-fitted. The entry side guide roller 8 has an upper flange 23, a lower flange 25, and a flange screw 26 press-fitted into predetermined positions on a shaft 28, and the roller 24 is rotatably mounted. A screw portion is formed on the outer periphery of the flange screw 26 and engages with the screw portion 10a to regulate the height of the upper flange 23.

The shaft 28 is lightly press-fitted into the piece 27 to ensure the height regulation of the upper flange 23.

As described above, although the guide roller has the upper and lower flanges, the lower flange has no regulating force at all when the tape is running, and is unnecessary. However, until the tape is pulled out of the cassette and wound around a cylinder to form a traveling path, if there is no position regulation in the width direction of the tape, the tape is likely to fluctuate in the width direction during tape withdrawal, and the tape may be scratched. This is because it is necessary to regulate the position in the width direction during drawing.

[0015]

The prior art described above is
This is effective in preventing tape damage and the like until the tape is pulled out from the cassette and wound around the cylinder to form a traveling path. However, a guide roller having a lower flange has more manufacturing steps than a guide roller without a lower flange, and has been an obstacle in reducing costs.

Accordingly, a technical problem to be solved by the present invention is to solve the above-mentioned problems of the prior art. The purpose of the present invention is to use a guide roller having no lower flange even if a guide roller having no lower flange is used. It is an object of the present invention to provide a magnetic recording / reproducing apparatus which can obtain the same performance as that of the related art without scratches or the like and without using expensive components without affecting tape running.

[0017]

In order to achieve the above object, a guide for regulating the position in the width direction when the tape is pulled out is provided integrally with the tape guide body without the lower flange of the guide roller.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below.

Since the mechanical components in the present invention are the same as those described in the conventional example, the following description will focus on the guide rollers and the tape guide.

FIG. 1 is a sectional view of the tape guide of the present embodiment.

Reference numeral 29 denotes a washer for holding the roller 24. Numeral 10b (14b) is a flange provided on the tape guide, and has the same function as the lower flange 25 described in the conventional example of FIG. The relationship between the flange 10b (14b), the upper flange 23, and the roller 24 is φC ≧ φA> φB or φA.
It is configured to satisfy the condition of ≧ φC> φB. As a result, the flange 10b (14b) regulates the position of the tape in the width direction until the tape is pulled out from the cassette and wound around the cylinder without giving a restricting force to the tape 1 while the tape is running as shown in FIG. This makes it possible to prevent the tape from being damaged such as being scratched.

[0022]

As described above, according to the present invention,
Even if a guide roller having no lower flange is used, the tape can run stably, and the cost can be reduced with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a sectional view of a tape guide according to an embodiment of the present invention.

FIG. 2 is a plan view of a tape traveling system when a cassette is mounted in a conventional mechanism.

FIG. 3 is a schematic view of a tape running system of a conventional mechanism.

FIG. 4 is a sectional view of a tape guide of a conventional mechanism.

FIG. 5 is a schematic diagram of a traveling system according to an embodiment of the present invention.

[Explanation of symbols]

1 ... tape, 2 ... cassette, 3 ...
Supply reel, 4 ... Entering tape guide, 5 ... Tension pin, 6 ... Entering tape guide, 7 ... Erase head,
8 Entry side guide roller, 9 Entry side inclined guide, 10 Tape guide L, 10a Screw part, 10b ...
Flange, 11: Cylinder, 12: Outgoing inclined guide, 13: Outgoing guide roller, 14: Tape guide R, 14a: Screw part, 14b: Flange, 15
... Sound head, 16 ... Tape guide on the outgoing side, 17 ... Capstan, 18 ... Pinch roller, 19 ... Guide to pull out the tape, 20 ... Reel on the winding side, 21 ... Main board, 22 ... Lead, 23 ... Top flange, 24 ... Roller, 25 ... lower flange,
26 ... flange screw, 27 ... piece, 28
... shaft, 29 ... washer.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideharu Ohno 1410 Inada, Hitachinaka-shi, Ibaraki Pref. Hitachi, Ltd. Visual Information Media Division

Claims (1)

[Claims] 1. A rotary cylinder on which a magnetic head for recording / reproducing information on / from a tape is mounted, and a traveling path for guiding the tape stretched between two reels and winding the tape around the rotary cylinder at a predetermined angle. In a recording / reproducing apparatus comprising a first tape guide and a guide roller to be formed, and a second tape guide and a guide roller, the first and second guides are provided on the first and second tape guides. A magnetic recording / reproducing apparatus, wherein a lower flange of a roller is formed and integrated.